+++ /dev/null
-/*
- * File dwarf.c - read dwarf2 information from the ELF modules
- *
- * Copyright (C) 2005, Raphael Junqueira
- * Copyright (C) 2006-2011, Eric Pouech
- * Copyright (C) 2010, Alexandre Julliard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#include "dbghelp_private.h"
-
-#ifdef HAVE_ZLIB
-#include <zlib.h>
-#endif
-
-WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
-
-/* FIXME:
- * - Functions:
- * o unspecified parameters
- * o inlined functions
- * o Debug{Start|End}Point
- * o CFA
- * - Udt
- * o proper types loading (nesting)
- */
-
-#if 0
-static void dump(const void* ptr, unsigned len)
-{
- int i, j;
- BYTE msg[128];
- static const char hexof[] = "0123456789abcdef";
- const BYTE* x = ptr;
-
- for (i = 0; i < len; i += 16)
- {
- sprintf(msg, "%08x: ", i);
- memset(msg + 10, ' ', 3 * 16 + 1 + 16);
- for (j = 0; j < min(16, len - i); j++)
- {
- msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
- msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
- msg[10 + 3 * j + 2] = ' ';
- msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
- x[i + j] : '.';
- }
- msg[10 + 3 * 16] = ' ';
- msg[10 + 3 * 16 + 1 + 16] = '\0';
- TRACE("%s\n", msg);
- }
-}
-#endif
-
-/**
- *
- * Main Specs:
- * http://www.eagercon.com/dwarf/dwarf3std.htm
- * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
- *
- * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
- *
- * example of projects who do dwarf2 parsing:
- * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
- * http://elis.ugent.be/diota/log/ltrace_elf.c
- */
-#include "dwarf.h"
-
-/**
- * Parsers
- */
-
-typedef struct dwarf2_abbrev_entry_attr_s
-{
- unsigned long attribute;
- unsigned long form;
- struct dwarf2_abbrev_entry_attr_s* next;
-} dwarf2_abbrev_entry_attr_t;
-
-typedef struct dwarf2_abbrev_entry_s
-{
- unsigned long entry_code;
- unsigned long tag;
- unsigned char have_child;
- unsigned num_attr;
- dwarf2_abbrev_entry_attr_t* attrs;
-} dwarf2_abbrev_entry_t;
-
-struct dwarf2_block
-{
- unsigned size;
- const unsigned char* ptr;
-};
-
-struct attribute
-{
- unsigned long form;
- enum {attr_direct, attr_abstract_origin, attr_specification} gotten_from;
- union
- {
- unsigned long uvalue;
- ULONGLONG lluvalue;
- long svalue;
- const char* string;
- struct dwarf2_block block;
- } u;
-};
-
-typedef struct dwarf2_debug_info_s
-{
- const dwarf2_abbrev_entry_t*abbrev;
- struct symt* symt;
- const unsigned char** data;
- struct vector children;
- struct dwarf2_debug_info_s* parent;
-} dwarf2_debug_info_t;
-
-typedef struct dwarf2_section_s
-{
- BOOL compressed;
- const unsigned char* address;
- unsigned size;
- DWORD_PTR rva;
-} dwarf2_section_t;
-
-enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_ranges, section_max};
-
-typedef struct dwarf2_traverse_context_s
-{
- const unsigned char* data;
- const unsigned char* end_data;
- unsigned char word_size;
-} dwarf2_traverse_context_t;
-
-/* symt_cache indexes */
-#define sc_void 0
-#define sc_int1 1
-#define sc_int2 2
-#define sc_int4 3
-#define sc_num 4
-
-typedef struct dwarf2_parse_context_s
-{
- const dwarf2_section_t* sections;
- unsigned section;
- struct pool pool;
- struct module* module;
- struct symt_compiland* compiland;
- const struct elf_thunk_area*thunks;
- struct sparse_array abbrev_table;
- struct sparse_array debug_info_table;
- unsigned long load_offset;
- unsigned long ref_offset;
- struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
- char* cpp_name;
-} dwarf2_parse_context_t;
-
-/* stored in the dbghelp's module internal structure for later reuse */
-struct dwarf2_module_info_s
-{
- dwarf2_section_t debug_loc;
- dwarf2_section_t debug_frame;
- dwarf2_section_t eh_frame;
- unsigned char word_size;
-};
-
-#define loc_dwarf2_location_list (loc_user + 0)
-#define loc_dwarf2_block (loc_user + 1)
-
-/* forward declarations */
-static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
-
-static unsigned char dwarf2_get_byte(const unsigned char* ptr)
-{
- return *ptr;
-}
-
-static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
-{
- unsigned char uvalue = dwarf2_get_byte(ctx->data);
- ctx->data += 1;
- return uvalue;
-}
-
-static unsigned short dwarf2_get_u2(const unsigned char* ptr)
-{
- return *(const UINT16*)ptr;
-}
-
-static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
-{
- unsigned short uvalue = dwarf2_get_u2(ctx->data);
- ctx->data += 2;
- return uvalue;
-}
-
-static unsigned long dwarf2_get_u4(const unsigned char* ptr)
-{
- return *(const UINT32*)ptr;
-}
-
-static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
-{
- unsigned long uvalue = dwarf2_get_u4(ctx->data);
- ctx->data += 4;
- return uvalue;
-}
-
-static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
-{
- return *(const UINT64*)ptr;
-}
-
-static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx)
-{
- DWORD64 uvalue = dwarf2_get_u8(ctx->data);
- ctx->data += 8;
- return uvalue;
-}
-
-static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
-{
- unsigned long ret = 0;
- unsigned char byte;
- unsigned shift = 0;
-
- do
- {
- byte = dwarf2_get_byte(ptr++);
- ret |= (byte & 0x7f) << shift;
- shift += 7;
- } while (byte & 0x80);
-
- if (end) *end = ptr;
- return ret;
-}
-
-static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
-{
- unsigned long ret;
-
- assert(ctx);
-
- ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
-
- return ret;
-}
-
-static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
-{
- long ret = 0;
- unsigned char byte;
- unsigned shift = 0;
- const unsigned size = sizeof(int) * 8;
-
- do
- {
- byte = dwarf2_get_byte(ptr++);
- ret |= (byte & 0x7f) << shift;
- shift += 7;
- } while (byte & 0x80);
- if (end) *end = ptr;
-
- /* as spec: sign bit of byte is 2nd high order bit (80x40)
- * -> 0x80 is used as flag.
- */
- if ((shift < size) && (byte & 0x40))
- {
- ret |= - (1 << shift);
- }
- return ret;
-}
-
-static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
-{
- long ret = 0;
-
- assert(ctx);
-
- ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
- return ret;
-}
-
-static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
-{
- unsigned ret;
- for (ret = 0; ctx->data[ret] & 0x80; ret++);
- return ret + 1;
-}
-
-/******************************************************************
- * dwarf2_get_addr
- *
- * Returns an address.
- * We assume that in all cases word size from Dwarf matches the size of
- * addresses in platform where the exec is compiled.
- */
-static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
-{
- unsigned long ret;
-
- switch (word_size)
- {
- case 4:
- ret = dwarf2_get_u4(ptr);
- break;
- case 8:
- ret = dwarf2_get_u8(ptr);
- break;
- default:
- FIXME("Unsupported Word Size %u\n", word_size);
- ret = 0;
- }
- return ret;
-}
-
-static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
-{
- unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
- ctx->data += ctx->word_size;
- return ret;
-}
-
-static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
-{
- return wine_dbg_sprintf("ctx(%p)", ctx->data);
-}
-
-static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
-{
- return wine_dbg_sprintf("ctx(%p,%s)",
- ctx, debugstr_w(ctx->module->module.ModuleName));
-}
-
-static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
-{
- return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
- di->abbrev, di->symt);
-}
-
-static dwarf2_abbrev_entry_t*
-dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
- unsigned long entry_code)
-{
- assert( NULL != abbrev_table );
- return sparse_array_find(abbrev_table, entry_code);
-}
-
-static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
- struct sparse_array* abbrev_table,
- struct pool* pool)
-{
- unsigned long entry_code;
- dwarf2_abbrev_entry_t* abbrev_entry;
- dwarf2_abbrev_entry_attr_t* new = NULL;
- dwarf2_abbrev_entry_attr_t* last = NULL;
- unsigned long attribute;
- unsigned long form;
-
- assert( NULL != abbrev_ctx );
-
- TRACE("%s, end at %p\n",
- dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
-
- sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
- while (abbrev_ctx->data < abbrev_ctx->end_data)
- {
- TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
- entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
- TRACE("found entry_code %lu\n", entry_code);
- if (!entry_code)
- {
- TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
- break;
- }
- abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
- assert( NULL != abbrev_entry );
-
- abbrev_entry->entry_code = entry_code;
- abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
- abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
- abbrev_entry->attrs = NULL;
- abbrev_entry->num_attr = 0;
-
- TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
- abbrev_table, sparse_array_length(abbrev_table),
- entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
-
- last = NULL;
- while (1)
- {
- attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
- form = dwarf2_leb128_as_unsigned(abbrev_ctx);
- if (!attribute) break;
-
- new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
- assert(new);
-
- new->attribute = attribute;
- new->form = form;
- new->next = NULL;
- if (abbrev_entry->attrs) last->next = new;
- else abbrev_entry->attrs = new;
- last = new;
- abbrev_entry->num_attr++;
- }
- }
- TRACE("found %u entries\n", sparse_array_length(abbrev_table));
-}
-
-static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
- const dwarf2_abbrev_entry_attr_t* abbrev_attr)
-{
- unsigned step;
-
- TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
-
- switch (abbrev_attr->form)
- {
- case DW_FORM_flag_present: step = 0; break;
- case DW_FORM_ref_addr:
- case DW_FORM_addr: step = ctx->word_size; break;
- case DW_FORM_flag:
- case DW_FORM_data1:
- case DW_FORM_ref1: step = 1; break;
- case DW_FORM_data2:
- case DW_FORM_ref2: step = 2; break;
- case DW_FORM_data4:
- case DW_FORM_ref4:
- case DW_FORM_strp: step = 4; break;
- case DW_FORM_data8:
- case DW_FORM_ref8: step = 8; break;
- case DW_FORM_sdata:
- case DW_FORM_ref_udata:
- case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
- case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
- case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
- case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
- case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
- case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
- default:
- FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
- return;
- }
- ctx->data += step;
-}
-
-static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
- const dwarf2_abbrev_entry_attr_t* abbrev_attr,
- const unsigned char* data,
- struct attribute* attr)
-{
- attr->form = abbrev_attr->form;
- switch (attr->form)
- {
- case DW_FORM_ref_addr:
- case DW_FORM_addr:
- attr->u.uvalue = dwarf2_get_addr(data,
- ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
- TRACE("addr<0x%lx>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_flag:
- attr->u.uvalue = dwarf2_get_byte(data);
- TRACE("flag<0x%lx>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_flag_present:
- attr->u.uvalue = 1;
- TRACE("flag_present\n");
- break;
-
- case DW_FORM_data1:
- attr->u.uvalue = dwarf2_get_byte(data);
- TRACE("data1<%lu>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_data2:
- attr->u.uvalue = dwarf2_get_u2(data);
- TRACE("data2<%lu>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_data4:
- attr->u.uvalue = dwarf2_get_u4(data);
- TRACE("data4<%lu>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_data8:
- attr->u.lluvalue = dwarf2_get_u8(data);
- TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
- break;
-
- case DW_FORM_ref1:
- attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
- TRACE("ref1<0x%lx>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_ref2:
- attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
- TRACE("ref2<0x%lx>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_ref4:
- attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
- TRACE("ref4<0x%lx>\n", attr->u.uvalue);
- break;
-
- case DW_FORM_ref8:
- FIXME("Unhandled 64-bit support\n");
- break;
-
- case DW_FORM_sdata:
- attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
- break;
-
- case DW_FORM_ref_udata:
- attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
- break;
-
- case DW_FORM_udata:
- attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
- break;
-
- case DW_FORM_string:
- attr->u.string = (const char *)data;
- TRACE("string<%s>\n", attr->u.string);
- break;
-
- case DW_FORM_strp:
- {
- unsigned long offset = dwarf2_get_u4(data);
- attr->u.string = (const char*)ctx->sections[section_string].address + offset;
- }
- TRACE("strp<%s>\n", attr->u.string);
- break;
-
- case DW_FORM_block:
- attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
- break;
-
- case DW_FORM_block1:
- attr->u.block.size = dwarf2_get_byte(data);
- attr->u.block.ptr = data + 1;
- break;
-
- case DW_FORM_block2:
- attr->u.block.size = dwarf2_get_u2(data);
- attr->u.block.ptr = data + 2;
- break;
-
- case DW_FORM_block4:
- attr->u.block.size = dwarf2_get_u4(data);
- attr->u.block.ptr = data + 4;
- break;
-
- default:
- FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
- break;
- }
-}
-
-static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
- const dwarf2_debug_info_t* di,
- unsigned at, struct attribute* attr)
-{
- unsigned i, refidx = 0;
- dwarf2_abbrev_entry_attr_t* abbrev_attr;
- dwarf2_abbrev_entry_attr_t* ref_abbrev_attr = NULL;
-
- attr->gotten_from = attr_direct;
- while (di)
- {
- ref_abbrev_attr = NULL;
- for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
- {
- if (abbrev_attr->attribute == at)
- {
- dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
- return TRUE;
- }
- if ((abbrev_attr->attribute == DW_AT_abstract_origin ||
- abbrev_attr->attribute == DW_AT_specification) &&
- at != DW_AT_sibling)
- {
- if (ref_abbrev_attr)
- FIXME("two references %lx and %lx\n", ref_abbrev_attr->attribute, abbrev_attr->attribute);
- ref_abbrev_attr = abbrev_attr;
- refidx = i;
- attr->gotten_from = (abbrev_attr->attribute == DW_AT_abstract_origin) ?
- attr_abstract_origin : attr_specification;
- }
- }
- /* do we have either an abstract origin or a specification debug entry to look into ? */
- if (!ref_abbrev_attr) break;
- dwarf2_fill_attr(ctx, ref_abbrev_attr, di->data[refidx], attr);
- if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
- FIXME("Should have found the debug info entry\n");
- }
- return FALSE;
-}
-
-static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*);
-
-#define Wine_DW_no_register 0x7FFFFFFF
-
-static unsigned dwarf2_map_register(int regno)
-{
- if (regno == Wine_DW_no_register)
- {
- FIXME("What the heck map reg 0x%x\n",regno);
- return 0;
- }
- return dbghelp_current_cpu->map_dwarf_register(regno, FALSE);
-}
-
-static enum location_error
-compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
- HANDLE hproc, const struct location* frame)
-{
- DWORD_PTR tmp, stack[64];
- unsigned stk;
- unsigned char op;
- BOOL piece_found = FALSE;
-
- stack[stk = 0] = 0;
-
- loc->kind = loc_absolute;
- loc->reg = Wine_DW_no_register;
-
- while (ctx->data < ctx->end_data)
- {
- op = dwarf2_parse_byte(ctx);
-
- if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
- stack[++stk] = op - DW_OP_lit0;
- else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
- {
- /* dbghelp APIs don't know how to cope with this anyway
- * (for example 'long long' stored in two registers)
- * FIXME: We should tell winedbg how to deal with it (sigh)
- */
- if (!piece_found)
- {
- DWORD cvreg = dwarf2_map_register(op - DW_OP_reg0);
- if (loc->reg != Wine_DW_no_register)
- FIXME("Only supporting one reg (%s/%d -> %s/%d)\n",
- dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
- dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
- loc->reg = cvreg;
- }
- loc->kind = loc_register;
- }
- else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
- {
- /* dbghelp APIs don't know how to cope with this anyway
- * (for example 'long long' stored in two registers)
- * FIXME: We should tell winedbg how to deal with it (sigh)
- */
- if (!piece_found)
- {
- DWORD cvreg = dwarf2_map_register(op - DW_OP_breg0);
- if (loc->reg != Wine_DW_no_register)
- FIXME("Only supporting one breg (%s/%d -> %s/%d)\n",
- dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
- dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
- loc->reg = cvreg;
- }
- stack[++stk] = dwarf2_leb128_as_signed(ctx);
- loc->kind = loc_regrel;
- }
- else switch (op)
- {
- case DW_OP_nop: break;
- case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
- case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
- case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
- case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
- case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
- case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
- case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
- case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
- case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
- case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
- case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
- case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
- case DW_OP_drop: stk--; break;
- case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
- case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
- case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
- case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
- case DW_OP_abs: stack[stk] = labs(stack[stk]); break;
- case DW_OP_neg: stack[stk] = -stack[stk]; break;
- case DW_OP_not: stack[stk] = ~stack[stk]; break;
- case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
- case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
- case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
- case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
- case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
- case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
- case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
- case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
- case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
- case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
- case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
- case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
- case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
- case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
- case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
- case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
- case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
- case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
- case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
- case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break;
- case DW_OP_regx:
- tmp = dwarf2_leb128_as_unsigned(ctx);
- if (!piece_found)
- {
- if (loc->reg != Wine_DW_no_register)
- FIXME("Only supporting one reg\n");
- loc->reg = dwarf2_map_register(tmp);
- }
- loc->kind = loc_register;
- break;
- case DW_OP_bregx:
- tmp = dwarf2_leb128_as_unsigned(ctx);
- if (loc->reg != Wine_DW_no_register)
- FIXME("Only supporting one regx\n");
- loc->reg = dwarf2_map_register(tmp);
- stack[++stk] = dwarf2_leb128_as_signed(ctx);
- loc->kind = loc_regrel;
- break;
- case DW_OP_fbreg:
- if (loc->reg != Wine_DW_no_register)
- FIXME("Only supporting one reg (%s/%d -> -2)\n",
- dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg);
- if (frame && frame->kind == loc_register)
- {
- loc->kind = loc_regrel;
- loc->reg = frame->reg;
- stack[++stk] = dwarf2_leb128_as_signed(ctx);
- }
- else if (frame && frame->kind == loc_regrel)
- {
- loc->kind = loc_regrel;
- loc->reg = frame->reg;
- stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
- }
- else
- {
- /* FIXME: this could be later optimized by not recomputing
- * this very location expression
- */
- loc->kind = loc_dwarf2_block;
- stack[++stk] = dwarf2_leb128_as_signed(ctx);
- }
- break;
- case DW_OP_piece:
- {
- unsigned sz = dwarf2_leb128_as_unsigned(ctx);
- WARN("Not handling OP_piece (size=%d)\n", sz);
- piece_found = TRUE;
- }
- break;
- case DW_OP_deref:
- if (!stk)
- {
- FIXME("Unexpected empty stack\n");
- return loc_err_internal;
- }
- if (loc->reg != Wine_DW_no_register)
- {
- WARN("Too complex expression for deref\n");
- return loc_err_too_complex;
- }
- if (hproc)
- {
- DWORD_PTR addr = stack[stk--];
- DWORD_PTR deref;
-
- if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
- {
- WARN("Couldn't read memory at %lx\n", addr);
- return loc_err_cant_read;
- }
- stack[++stk] = deref;
- }
- else
- {
- loc->kind = loc_dwarf2_block;
- }
- break;
- case DW_OP_deref_size:
- if (!stk)
- {
- FIXME("Unexpected empty stack\n");
- return loc_err_internal;
- }
- if (loc->reg != Wine_DW_no_register)
- {
- WARN("Too complex expression for deref\n");
- return loc_err_too_complex;
- }
- if (hproc)
- {
- DWORD_PTR addr = stack[stk--];
- BYTE derefsize = dwarf2_parse_byte(ctx);
- DWORD64 deref;
-
- if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
- {
- WARN("Couldn't read memory at %lx\n", addr);
- return loc_err_cant_read;
- }
-
- switch (derefsize)
- {
- case 1: stack[++stk] = *(unsigned char*)&deref; break;
- case 2: stack[++stk] = *(unsigned short*)&deref; break;
- case 4: stack[++stk] = *(DWORD*)&deref; break;
- case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
- }
- }
- else
- {
- dwarf2_parse_byte(ctx);
- loc->kind = loc_dwarf2_block;
- }
- break;
- case DW_OP_stack_value:
- /* Expected behaviour is that this is the last instruction of this
- * expression and just the "top of stack" value should be put to loc->offset. */
- break;
- default:
- if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
- FIXME("Unhandled attr op: %x\n", op);
- /* FIXME else unhandled extension */
- return loc_err_internal;
- }
- }
- loc->offset = stack[stk];
- return 0;
-}
-
-static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
- const dwarf2_debug_info_t* di,
- unsigned long dw,
- struct location* loc,
- const struct location* frame)
-{
- struct attribute xloc;
-
- if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
-
- switch (xloc.form)
- {
- case DW_FORM_data1: case DW_FORM_data2:
- case DW_FORM_udata: case DW_FORM_sdata:
- loc->kind = loc_absolute;
- loc->reg = 0;
- loc->offset = xloc.u.uvalue;
- return TRUE;
- case DW_FORM_data4: case DW_FORM_data8:
- loc->kind = loc_dwarf2_location_list;
- loc->reg = Wine_DW_no_register;
- loc->offset = xloc.u.uvalue;
- return TRUE;
- case DW_FORM_block:
- case DW_FORM_block1:
- case DW_FORM_block2:
- case DW_FORM_block4:
- break;
- default: FIXME("Unsupported yet form %lx\n", xloc.form);
- return FALSE;
- }
-
- /* assume we have a block form */
-
- if (xloc.u.block.size)
- {
- dwarf2_traverse_context_t lctx;
- enum location_error err;
-
- lctx.data = xloc.u.block.ptr;
- lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
- lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
-
- err = compute_location(&lctx, loc, NULL, frame);
- if (err < 0)
- {
- loc->kind = loc_error;
- loc->reg = err;
- }
- else if (loc->kind == loc_dwarf2_block)
- {
- unsigned* ptr = pool_alloc(&ctx->module->pool,
- sizeof(unsigned) + xloc.u.block.size);
- *ptr = xloc.u.block.size;
- memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
- loc->offset = (unsigned long)ptr;
- }
- }
- return TRUE;
-}
-
-static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
- const dwarf2_debug_info_t* di)
-{
- struct attribute attr;
- dwarf2_debug_info_t* type;
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
- return NULL;
- if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue)))
- {
- FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
- return NULL;
- }
- if (!type->symt)
- {
- /* load the debug info entity */
- dwarf2_load_one_entry(ctx, type);
- if (!type->symt)
- FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag);
- }
- return type->symt;
-}
-
-static const char* dwarf2_get_cpp_name(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* di, const char* name)
-{
- char* last;
- struct attribute diname;
- struct attribute spec;
-
- if (di->abbrev->tag == DW_TAG_compile_unit) return name;
- if (!ctx->cpp_name)
- ctx->cpp_name = pool_alloc(&ctx->pool, MAX_SYM_NAME);
- last = ctx->cpp_name + MAX_SYM_NAME - strlen(name) - 1;
- strcpy(last, name);
-
- /* if the di is a definition, but has also a (previous) declaration, then scope must
- * be gotten from declaration not definition
- */
- if (dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec) && spec.gotten_from == attr_direct)
- {
- di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue);
- if (!di)
- {
- FIXME("Should have found the debug info entry\n");
- return NULL;
- }
- }
-
- for (di = di->parent; di; di = di->parent)
- {
- switch (di->abbrev->tag)
- {
- case DW_TAG_namespace:
- case DW_TAG_structure_type:
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_union_type:
- if (dwarf2_find_attribute(ctx, di, DW_AT_name, &diname))
- {
- size_t len = strlen(diname.u.string);
- last -= 2 + len;
- if (last < ctx->cpp_name) return NULL;
- memcpy(last, diname.u.string, len);
- last[len] = last[len + 1] = ':';
- }
- break;
- default:
- break;
- }
- }
- return last;
-}
-
-/******************************************************************
- * dwarf2_read_range
- *
- * read a range for a given debug_info (either using AT_range attribute, in which
- * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes)
- * in all cases, range is relative to beginning of compilation unit
- */
-static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_info_t* di,
- unsigned long* plow, unsigned long* phigh)
-{
- struct attribute range;
-
- if (dwarf2_find_attribute(ctx, di, DW_AT_ranges, &range))
- {
- dwarf2_traverse_context_t traverse;
- unsigned long low, high;
-
- traverse.data = ctx->sections[section_ranges].address + range.u.uvalue;
- traverse.end_data = ctx->sections[section_ranges].address +
- ctx->sections[section_ranges].size;
- traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
-
- *plow = ULONG_MAX;
- *phigh = 0;
- while (traverse.data + 2 * traverse.word_size < traverse.end_data)
- {
- low = dwarf2_parse_addr(&traverse);
- high = dwarf2_parse_addr(&traverse);
- if (low == 0 && high == 0) break;
- if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n");
- if (low < *plow) *plow = low;
- if (high > *phigh) *phigh = high;
- }
- if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
- if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;}
-
- return TRUE;
- }
- else
- {
- struct attribute low_pc;
- struct attribute high_pc;
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) ||
- !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc))
- return FALSE;
- *plow = low_pc.u.uvalue;
- *phigh = high_pc.u.uvalue;
- return TRUE;
- }
-}
-
-/******************************************************************
- * dwarf2_read_one_debug_info
- *
- * Loads into memory one debug info entry, and recursively its children (if any)
- */
-static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
- dwarf2_traverse_context_t* traverse,
- dwarf2_debug_info_t* parent_di,
- dwarf2_debug_info_t** pdi)
-{
- const dwarf2_abbrev_entry_t*abbrev;
- unsigned long entry_code;
- unsigned long offset;
- dwarf2_debug_info_t* di;
- dwarf2_debug_info_t* child;
- dwarf2_debug_info_t** where;
- dwarf2_abbrev_entry_attr_t* attr;
- unsigned i;
- struct attribute sibling;
-
- offset = traverse->data - ctx->sections[ctx->section].address;
- entry_code = dwarf2_leb128_as_unsigned(traverse);
- TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
- if (!entry_code)
- {
- *pdi = NULL;
- return TRUE;
- }
- abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
- if (!abbrev)
- {
- WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
- return FALSE;
- }
- di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
- if (!di) return FALSE;
- di->abbrev = abbrev;
- di->symt = NULL;
- di->parent = parent_di;
-
- if (abbrev->num_attr)
- {
- di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
- for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
- {
- di->data[i] = traverse->data;
- dwarf2_swallow_attribute(traverse, attr);
- }
- }
- else di->data = NULL;
- if (abbrev->have_child)
- {
- vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
- while (traverse->data < traverse->end_data)
- {
- if (!dwarf2_read_one_debug_info(ctx, traverse, di, &child)) return FALSE;
- if (!child) break;
- where = vector_add(&di->children, &ctx->pool);
- if (!where) return FALSE;
- *where = child;
- }
- }
- if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
- traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
- {
- WARN("setting cursor for %s to next sibling <0x%lx>\n",
- dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
- traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
- }
- *pdi = di;
- return TRUE;
-}
-
-static struct vector* dwarf2_get_di_children(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct attribute spec;
-
- while (di)
- {
- if (di->abbrev->have_child)
- return &di->children;
- if (!dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec)) break;
- if (!(di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue)))
- FIXME("Should have found the debug info entry\n");
- }
- return NULL;
-}
-
-static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct attribute name;
- struct attribute size;
- struct attribute encoding;
- enum BasicType bt;
- int cache_idx = -1;
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
- name.u.string = NULL;
- if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
- if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
-
- switch (encoding.u.uvalue)
- {
- case DW_ATE_void: bt = btVoid; break;
- case DW_ATE_address: bt = btULong; break;
- case DW_ATE_boolean: bt = btBool; break;
- case DW_ATE_complex_float: bt = btComplex; break;
- case DW_ATE_float: bt = btFloat; break;
- case DW_ATE_signed: bt = btInt; break;
- case DW_ATE_unsigned: bt = btUInt; break;
- case DW_ATE_signed_char: bt = btChar; break;
- case DW_ATE_unsigned_char: bt = btChar; break;
- default: bt = btNoType; break;
- }
- di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
- switch (bt)
- {
- case btVoid:
- assert(size.u.uvalue == 0);
- cache_idx = sc_void;
- break;
- case btInt:
- switch (size.u.uvalue)
- {
- case 1: cache_idx = sc_int1; break;
- case 2: cache_idx = sc_int2; break;
- case 4: cache_idx = sc_int4; break;
- }
- break;
- default: break;
- }
- if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
- ctx->symt_cache[cache_idx] = di->symt;
-
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
- return di->symt;
-}
-
-static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct symt* ref_type;
- struct attribute name;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
- ref_type = dwarf2_lookup_type(ctx, di);
-
- if (name.u.string)
- di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
- return di->symt;
-}
-
-static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct symt* ref_type;
- struct attribute size;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *);
- if (!(ref_type = dwarf2_lookup_type(ctx, di)))
- {
- ref_type = ctx->symt_cache[sc_void];
- assert(ref_type);
- }
- di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt;
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
- return di->symt;
-}
-
-static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct symt* ref_type;
- struct symt* idx_type = NULL;
- struct attribute min, max, cnt;
- dwarf2_debug_info_t* child;
- unsigned int i;
- const struct vector* children;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- ref_type = dwarf2_lookup_type(ctx, di);
-
- if (!(children = dwarf2_get_di_children(ctx, di)))
- {
- /* fake an array with unknown size */
- /* FIXME: int4 even on 64bit machines??? */
- idx_type = ctx->symt_cache[sc_int4];
- min.u.uvalue = 0;
- max.u.uvalue = -1;
- }
- else for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
- switch (child->abbrev->tag)
- {
- case DW_TAG_subrange_type:
- idx_type = dwarf2_lookup_type(ctx, child);
- if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
- min.u.uvalue = 0;
- if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
- max.u.uvalue = 0;
- if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
- max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
- break;
- default:
- FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
- child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
- break;
- }
- }
- di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
- return di->symt;
-}
-
-static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct symt* ref_type;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!(ref_type = dwarf2_lookup_type(ctx, di)))
- {
- ref_type = ctx->symt_cache[sc_void];
- assert(ref_type);
- }
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
- di->symt = ref_type;
-
- return ref_type;
-}
-
-static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct symt* ref_type;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!(ref_type = dwarf2_lookup_type(ctx, di)))
- {
- ref_type = ctx->symt_cache[sc_void];
- assert(ref_type);
- }
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
- di->symt = ref_type;
-
- return ref_type;
-}
-
-static struct symt* dwarf2_parse_unspecified_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct attribute name;
- struct attribute size;
- struct symt_basic *basic;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (di->symt) return di->symt;
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
- name.u.string = "void";
- size.u.uvalue = sizeof(void *);
-
- basic = symt_new_basic(ctx->module, btVoid, name.u.string, size.u.uvalue);
- di->symt = &basic->symt;
-
- if (!ctx->symt_cache[sc_void])
- ctx->symt_cache[sc_void] = di->symt;
-
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
- return di->symt;
-}
-
-static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct symt* ref_type = NULL;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- ref_type = dwarf2_lookup_type(ctx, di);
- /* FIXME: for now, we hard-wire C++ references to pointers */
- di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt;
-
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
-
- return di->symt;
-}
-
-static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di,
- struct symt_udt* parent)
-{
- struct symt* elt_type;
- struct attribute name;
- struct attribute bit_size;
- struct attribute bit_offset;
- struct location loc;
-
- assert(parent);
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
- elt_type = dwarf2_lookup_type(ctx, di);
- if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
- {
- if (loc.kind != loc_absolute)
- {
- FIXME("Found register, while not expecting it\n");
- loc.offset = 0;
- }
- else
- TRACE("found member_location at %s -> %lu\n",
- dwarf2_debug_ctx(ctx), loc.offset);
- }
- else
- loc.offset = 0;
- if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
- bit_size.u.uvalue = 0;
- if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
- {
- /* FIXME: we should only do this when implementation is LSB (which is
- * the case on i386 processors)
- */
- struct attribute nbytes;
- if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
- {
- DWORD64 size;
- nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
- (unsigned long)size : 0;
- }
- bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
- }
- else bit_offset.u.uvalue = 0;
- symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
- (loc.offset << 3) + bit_offset.u.uvalue,
- bit_size.u.uvalue);
-
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
-}
-
-static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di);
-
-static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di,
- enum UdtKind udt)
-{
- struct attribute name;
- struct attribute size;
- struct vector* children;
- dwarf2_debug_info_t*child;
- unsigned int i;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- /* quirk... FIXME provide real support for anonymous UDTs */
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
- name.u.string = "zz_anon_zz";
- if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
-
- di->symt = &symt_new_udt(ctx->module, dwarf2_get_cpp_name(ctx, di, name.u.string),
- size.u.uvalue, udt)->symt;
-
- children = dwarf2_get_di_children(ctx, di);
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
-
- switch (child->abbrev->tag)
- {
- case DW_TAG_array_type:
- dwarf2_parse_array_type(ctx, di);
- break;
- case DW_TAG_member:
- /* FIXME: should I follow the sibling stuff ?? */
- dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
- break;
- case DW_TAG_enumeration_type:
- dwarf2_parse_enumeration_type(ctx, child);
- break;
- case DW_TAG_subprogram:
- dwarf2_parse_subprogram(ctx, child);
- break;
- case DW_TAG_const_type:
- dwarf2_parse_const_type(ctx, child);
- break;
- case DW_TAG_structure_type:
- case DW_TAG_class_type:
- case DW_TAG_union_type:
- case DW_TAG_typedef:
- /* FIXME: we need to handle nested udt definitions */
- case DW_TAG_inheritance:
- case DW_TAG_template_type_param:
- case DW_TAG_template_value_param:
- case DW_TAG_variable:
- case DW_TAG_imported_declaration:
- case DW_TAG_ptr_to_member_type:
- case DW_TAG_GNU_template_parameter_pack:
- case DW_TAG_GNU_formal_parameter_pack:
- /* FIXME: some C++ related stuff */
- break;
- default:
- FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
- child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
- break;
- }
- }
-
- return di->symt;
-}
-
-static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di,
- struct symt_enum* parent)
-{
- struct attribute name;
- struct attribute value;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
- if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
- symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
-
- if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
-}
-
-static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct attribute name;
- struct attribute size;
- struct symt_basic* basetype;
- struct vector* children;
- dwarf2_debug_info_t*child;
- unsigned int i;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
- if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
-
- switch (size.u.uvalue) /* FIXME: that's wrong */
- {
- case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
- case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
- default:
- case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
- }
-
- di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
-
- children = dwarf2_get_di_children(ctx, di);
- /* FIXME: should we use the sibling stuff ?? */
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
-
- switch (child->abbrev->tag)
- {
- case DW_TAG_enumerator:
- dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
- break;
- default:
- FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
- di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
- }
- }
- return di->symt;
-}
-
-/* structure used to pass information around when parsing a subprogram */
-typedef struct dwarf2_subprogram_s
-{
- dwarf2_parse_context_t* ctx;
- struct symt_function* func;
- BOOL non_computed_variable;
- struct location frame;
-} dwarf2_subprogram_t;
-
-/******************************************************************
- * dwarf2_parse_variable
- *
- * Parses any variable (parameter, local/global variable)
- */
-static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
- struct symt_block* block,
- dwarf2_debug_info_t* di)
-{
- struct symt* param_type;
- struct attribute name, value;
- struct location loc;
- BOOL is_pmt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
-
- is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
- param_type = dwarf2_lookup_type(subpgm->ctx, di);
-
- if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
- /* cannot do much without the name, the functions below won't like it. */
- return;
- }
- if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
- &loc, &subpgm->frame))
- {
- struct attribute ext;
-
- TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
- name.u.string, loc.kind, loc.offset, loc.reg,
- dwarf2_debug_ctx(subpgm->ctx));
-
- switch (loc.kind)
- {
- case loc_error:
- break;
- case loc_absolute:
- /* it's a global variable */
- /* FIXME: we don't handle its scope yet */
- if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
- ext.u.uvalue = 0;
- loc.offset += subpgm->ctx->load_offset;
- symt_new_global_variable(subpgm->ctx->module, subpgm->ctx->compiland,
- dwarf2_get_cpp_name(subpgm->ctx, di, name.u.string), !ext.u.uvalue,
- loc, 0, param_type);
- break;
- default:
- subpgm->non_computed_variable = TRUE;
- /* fall through */
- case loc_register:
- case loc_regrel:
- /* either a pmt/variable relative to frame pointer or
- * pmt/variable in a register
- */
- assert(subpgm->func);
- symt_add_func_local(subpgm->ctx->module, subpgm->func,
- is_pmt ? DataIsParam : DataIsLocal,
- &loc, block, param_type, name.u.string);
- break;
- }
- }
- else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
- {
- VARIANT v;
- if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
- if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
- switch (value.form)
- {
- case DW_FORM_data1:
- case DW_FORM_data2:
- case DW_FORM_data4:
- case DW_FORM_udata:
- case DW_FORM_addr:
- v.n1.n2.vt = VT_UI4;
- v.n1.n2.n3.lVal = value.u.uvalue;
- break;
-
- case DW_FORM_data8:
- v.n1.n2.vt = VT_UI8;
- v.n1.n2.n3.llVal = value.u.lluvalue;
- break;
-
- case DW_FORM_sdata:
- v.n1.n2.vt = VT_I4;
- v.n1.n2.n3.lVal = value.u.svalue;
- break;
-
- case DW_FORM_strp:
- case DW_FORM_string:
- /* FIXME: native doesn't report const strings from here !!
- * however, the value of the string is in the code somewhere
- */
- v.n1.n2.vt = VT_I1 | VT_BYREF;
- v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
- break;
-
- case DW_FORM_block:
- case DW_FORM_block1:
- case DW_FORM_block2:
- case DW_FORM_block4:
- v.n1.n2.vt = VT_I4;
- switch (value.u.block.size)
- {
- case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
- case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
- case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
- default:
- v.n1.n2.vt = VT_I1 | VT_BYREF;
- v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
- memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
- }
- break;
-
- default:
- FIXME("Unsupported form for const value %s (%lx)\n",
- name.u.string, value.form);
- v.n1.n2.vt = VT_EMPTY;
- }
- di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->ctx->compiland,
- name.u.string, param_type, &v)->symt;
- }
- else
- {
- /* variable has been optimized away... report anyway */
- loc.kind = loc_error;
- loc.reg = loc_err_no_location;
- if (subpgm->func)
- {
- symt_add_func_local(subpgm->ctx->module, subpgm->func,
- is_pmt ? DataIsParam : DataIsLocal,
- &loc, block, param_type, name.u.string);
- }
- else
- {
- WARN("dropping global variable %s which has been optimized away\n", name.u.string);
- }
- }
- if (is_pmt && subpgm->func && subpgm->func->type)
- symt_add_function_signature_parameter(subpgm->ctx->module,
- (struct symt_function_signature*)subpgm->func->type,
- param_type);
-
- if (dwarf2_get_di_children(subpgm->ctx, di)) FIXME("Unsupported children\n");
-}
-
-static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
- const dwarf2_debug_info_t* di)
-{
- struct attribute name;
- struct attribute low_pc;
- struct location loc;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
- if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
- name.u.string = NULL;
-
- loc.kind = loc_absolute;
- loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
- symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
- &loc, name.u.string);
-}
-
-static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
- struct symt_block* parent_block,
- dwarf2_debug_info_t* di);
-
-static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di);
-
-static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
- struct symt_block* parent_block,
- dwarf2_debug_info_t* di)
-{
- struct symt_block* block;
- unsigned long low_pc, high_pc;
- struct vector* children;
- dwarf2_debug_info_t*child;
- unsigned int i;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
- {
- FIXME("cannot read range\n");
- return;
- }
-
- block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
- subpgm->ctx->load_offset + low_pc - subpgm->func->address,
- high_pc - low_pc);
-
- children = dwarf2_get_di_children(subpgm->ctx, di);
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
-
- switch (child->abbrev->tag)
- {
- case DW_TAG_formal_parameter:
- case DW_TAG_variable:
- dwarf2_parse_variable(subpgm, block, child);
- break;
- case DW_TAG_lexical_block:
- dwarf2_parse_subprogram_block(subpgm, block, child);
- break;
- case DW_TAG_inlined_subroutine:
- dwarf2_parse_inlined_subroutine(subpgm, block, child);
- break;
- case DW_TAG_label:
- dwarf2_parse_subprogram_label(subpgm, child);
- break;
- case DW_TAG_GNU_call_site:
- /* this isn't properly supported by dbghelp interface. skip it for now */
- break;
- default:
- FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
- child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
- dwarf2_debug_di(di));
- }
- }
- symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
-}
-
-static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
- struct symt_block* parent_block,
- dwarf2_debug_info_t* di)
-{
- struct symt_block* block;
- unsigned long low_pc, high_pc;
- struct vector* children;
- dwarf2_debug_info_t*child;
- unsigned int i;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
- {
- WARN("no range\n");
- return;
- }
-
- block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
- subpgm->ctx->load_offset + low_pc - subpgm->func->address,
- high_pc - low_pc);
-
- children = dwarf2_get_di_children(subpgm->ctx, di);
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
-
- switch (child->abbrev->tag)
- {
- case DW_TAG_inlined_subroutine:
- dwarf2_parse_inlined_subroutine(subpgm, block, child);
- break;
- case DW_TAG_variable:
- dwarf2_parse_variable(subpgm, block, child);
- break;
- case DW_TAG_pointer_type:
- dwarf2_parse_pointer_type(subpgm->ctx, di);
- break;
- case DW_TAG_subroutine_type:
- dwarf2_parse_subroutine_type(subpgm->ctx, di);
- break;
- case DW_TAG_const_type:
- dwarf2_parse_const_type(subpgm->ctx, di);
- break;
- case DW_TAG_lexical_block:
- dwarf2_parse_subprogram_block(subpgm, block, child);
- break;
- case DW_TAG_subprogram:
- /* FIXME: likely a declaration (to be checked)
- * skip it for now
- */
- break;
- case DW_TAG_formal_parameter:
- /* FIXME: likely elements for exception handling (GCC flavor)
- * Skip it for now
- */
- break;
- case DW_TAG_imported_module:
- /* C++ stuff to be silenced (for now) */
- break;
- case DW_TAG_GNU_call_site:
- /* this isn't properly supported by dbghelp interface. skip it for now */
- break;
- case DW_TAG_label:
- dwarf2_parse_subprogram_label(subpgm, child);
- break;
- case DW_TAG_class_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_enumeration_type:
- case DW_TAG_typedef:
- /* the type referred to will be loaded when we need it, so skip it */
- break;
- default:
- FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
- child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
- }
- }
-
- symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
-}
-
-static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct attribute name;
- unsigned long low_pc, high_pc;
- struct attribute is_decl;
- struct attribute inline_flags;
- struct symt* ret_type;
- struct symt_function_signature* sig_type;
- dwarf2_subprogram_t subpgm;
- struct vector* children;
- dwarf2_debug_info_t* child;
- unsigned int i;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
- {
- WARN("No name for function... dropping function\n");
- return NULL;
- }
- /* if it's an abstract representation of an inline function, there should be
- * a concrete object that we'll handle
- */
- if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags) &&
- inline_flags.u.uvalue != DW_INL_not_inlined)
- {
- TRACE("Function %s declared as inlined (%ld)... skipping\n",
- debugstr_a(name.u.string), inline_flags.u.uvalue);
- return NULL;
- }
-
- if (dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl) &&
- is_decl.u.uvalue && is_decl.gotten_from == attr_direct)
- {
- /* it's a real declaration, skip it */
- return NULL;
- }
- if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc))
- {
- WARN("cannot get range for %s\n", name.u.string);
- return NULL;
- }
- /* As functions (defined as inline assembly) get debug info with dwarf
- * (not the case for stabs), we just drop Wine's thunks here...
- * Actual thunks will be created in elf_module from the symbol table
- */
-#ifndef DBGHELP_STATIC_LIB
- if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0)
- return NULL;
-#endif
- if (!(ret_type = dwarf2_lookup_type(ctx, di)))
- {
- ret_type = ctx->symt_cache[sc_void];
- assert(ret_type);
- }
- /* FIXME: assuming C source code */
- sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
- subpgm.func = symt_new_function(ctx->module, ctx->compiland,
- dwarf2_get_cpp_name(ctx, di, name.u.string),
- ctx->load_offset + low_pc, high_pc - low_pc,
- &sig_type->symt);
- di->symt = &subpgm.func->symt;
- subpgm.ctx = ctx;
- if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
- &subpgm.frame, NULL))
- {
- /* on stack !! */
- subpgm.frame.kind = loc_regrel;
- subpgm.frame.reg = dbghelp_current_cpu->frame_regno;
- subpgm.frame.offset = 0;
- }
- subpgm.non_computed_variable = FALSE;
-
- children = dwarf2_get_di_children(ctx, di);
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
-
- switch (child->abbrev->tag)
- {
- case DW_TAG_variable:
- case DW_TAG_formal_parameter:
- dwarf2_parse_variable(&subpgm, NULL, child);
- break;
- case DW_TAG_lexical_block:
- dwarf2_parse_subprogram_block(&subpgm, NULL, child);
- break;
- case DW_TAG_inlined_subroutine:
- dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
- break;
- case DW_TAG_pointer_type:
- dwarf2_parse_pointer_type(subpgm.ctx, di);
- break;
- case DW_TAG_const_type:
- dwarf2_parse_const_type(subpgm.ctx, di);
- break;
- case DW_TAG_subprogram:
- /* FIXME: likely a declaration (to be checked)
- * skip it for now
- */
- break;
- case DW_TAG_label:
- dwarf2_parse_subprogram_label(&subpgm, child);
- break;
- case DW_TAG_class_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_enumeration_type:
- case DW_TAG_typedef:
- /* the type referred to will be loaded when we need it, so skip it */
- break;
- case DW_TAG_unspecified_parameters:
- case DW_TAG_template_type_param:
- case DW_TAG_template_value_param:
- case DW_TAG_GNU_call_site:
- case DW_TAG_GNU_template_parameter_pack:
- case DW_TAG_GNU_formal_parameter_pack:
- /* FIXME: no support in dbghelp's internals so far */
- break;
- default:
- FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
- child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
- }
- }
-
- if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
- {
- symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
- &subpgm.frame, NULL);
- }
- if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
-
- return di->symt;
-}
-
-static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct symt* ret_type;
- struct symt_function_signature* sig_type;
- struct vector* children;
- dwarf2_debug_info_t* child;
- unsigned int i;
-
- if (di->symt) return di->symt;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- if (!(ret_type = dwarf2_lookup_type(ctx, di)))
- {
- ret_type = ctx->symt_cache[sc_void];
- assert(ret_type);
- }
-
- /* FIXME: assuming C source code */
- sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
-
- children = dwarf2_get_di_children(ctx, di);
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
-
- switch (child->abbrev->tag)
- {
- case DW_TAG_formal_parameter:
- symt_add_function_signature_parameter(ctx->module, sig_type,
- dwarf2_lookup_type(ctx, child));
- break;
- case DW_TAG_unspecified_parameters:
- WARN("Unsupported unspecified parameters\n");
- break;
- }
- }
-
- return di->symt = &sig_type->symt;
-}
-
-static void dwarf2_parse_namespace(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- struct vector* children;
- dwarf2_debug_info_t* child;
- unsigned int i;
-
- if (di->symt) return;
-
- TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
-
- di->symt = ctx->symt_cache[sc_void];
-
- children = dwarf2_get_di_children(ctx, di);
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
- dwarf2_load_one_entry(ctx, child);
- }
-}
-
-static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
- dwarf2_debug_info_t* di)
-{
- switch (di->abbrev->tag)
- {
- case DW_TAG_typedef:
- dwarf2_parse_typedef(ctx, di);
- break;
- case DW_TAG_base_type:
- dwarf2_parse_base_type(ctx, di);
- break;
- case DW_TAG_pointer_type:
- dwarf2_parse_pointer_type(ctx, di);
- break;
- case DW_TAG_class_type:
- dwarf2_parse_udt_type(ctx, di, UdtClass);
- break;
- case DW_TAG_structure_type:
- dwarf2_parse_udt_type(ctx, di, UdtStruct);
- break;
- case DW_TAG_union_type:
- dwarf2_parse_udt_type(ctx, di, UdtUnion);
- break;
- case DW_TAG_array_type:
- dwarf2_parse_array_type(ctx, di);
- break;
- case DW_TAG_const_type:
- dwarf2_parse_const_type(ctx, di);
- break;
- case DW_TAG_volatile_type:
- dwarf2_parse_volatile_type(ctx, di);
- break;
- case DW_TAG_unspecified_type:
- dwarf2_parse_unspecified_type(ctx, di);
- break;
- case DW_TAG_reference_type:
- dwarf2_parse_reference_type(ctx, di);
- break;
- case DW_TAG_enumeration_type:
- dwarf2_parse_enumeration_type(ctx, di);
- break;
- case DW_TAG_subprogram:
- dwarf2_parse_subprogram(ctx, di);
- break;
- case DW_TAG_subroutine_type:
- dwarf2_parse_subroutine_type(ctx, di);
- break;
- case DW_TAG_variable:
- {
- dwarf2_subprogram_t subpgm;
-
- subpgm.ctx = ctx;
- subpgm.func = NULL;
- subpgm.frame.kind = loc_absolute;
- subpgm.frame.offset = 0;
- subpgm.frame.reg = Wine_DW_no_register;
- dwarf2_parse_variable(&subpgm, NULL, di);
- }
- break;
- case DW_TAG_namespace:
- dwarf2_parse_namespace(ctx, di);
- break;
- /* silence a couple of C++ defines */
- case DW_TAG_imported_module:
- case DW_TAG_imported_declaration:
- case DW_TAG_ptr_to_member_type:
- break;
- default:
- FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
- di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
- }
-}
-
-static void dwarf2_set_line_number(struct module* module, unsigned long address,
- const struct vector* v, unsigned file, unsigned line)
-{
- struct symt_function* func;
- struct symt_ht* symt;
- unsigned* psrc;
-
- if (!file || !(psrc = vector_at(v, file - 1))) return;
-
- TRACE("%s %lx %s %u\n",
- debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
- if (!(symt = symt_find_nearest(module, address)) ||
- symt->symt.tag != SymTagFunction) return;
- func = (struct symt_function*)symt;
- symt_add_func_line(module, func, *psrc, line, address - func->address);
-}
-
-static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
- dwarf2_parse_context_t* ctx,
- const char* compile_dir,
- unsigned long offset)
-{
- dwarf2_traverse_context_t traverse;
- unsigned long length;
- unsigned insn_size, default_stmt;
- unsigned line_range, opcode_base;
- int line_base;
- const unsigned char* opcode_len;
- struct vector dirs;
- struct vector files;
- const char** p;
-
- /* section with line numbers stripped */
- if (sections[section_line].address == IMAGE_NO_MAP)
- return FALSE;
-
- if (offset + 4 > sections[section_line].size)
- {
- WARN("out of bounds offset\n");
- return FALSE;
- }
- traverse.data = sections[section_line].address + offset;
- traverse.end_data = traverse.data + 4;
- traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
-
- length = dwarf2_parse_u4(&traverse);
- traverse.end_data = sections[section_line].address + offset + length;
-
- if (offset + 4 + length > sections[section_line].size)
- {
- WARN("out of bounds header\n");
- return FALSE;
- }
- dwarf2_parse_u2(&traverse); /* version */
- dwarf2_parse_u4(&traverse); /* header_len */
- insn_size = dwarf2_parse_byte(&traverse);
- default_stmt = dwarf2_parse_byte(&traverse);
- line_base = (signed char)dwarf2_parse_byte(&traverse);
- line_range = dwarf2_parse_byte(&traverse);
- opcode_base = dwarf2_parse_byte(&traverse);
-
- opcode_len = traverse.data;
- traverse.data += opcode_base - 1;
-
- vector_init(&dirs, sizeof(const char*), 4);
- p = vector_add(&dirs, &ctx->pool);
- *p = compile_dir ? compile_dir : ".";
- while (*traverse.data)
- {
- const char* rel = (const char*)traverse.data;
- unsigned rellen = strlen(rel);
- TRACE("Got include %s\n", rel);
- traverse.data += rellen + 1;
- p = vector_add(&dirs, &ctx->pool);
-
- if (*rel == '/' || !compile_dir)
- *p = rel;
- else
- {
- /* include directory relative to compile directory */
- unsigned baselen = strlen(compile_dir);
- char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
- strcpy(tmp, compile_dir);
- if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
- strcpy(&tmp[baselen], rel);
- *p = tmp;
- }
-
- }
- traverse.data++;
-
- vector_init(&files, sizeof(unsigned), 16);
- while (*traverse.data)
- {
- unsigned int dir_index, mod_time;
- const char* name;
- const char* dir;
- unsigned* psrc;
-
- name = (const char*)traverse.data;
- traverse.data += strlen(name) + 1;
- dir_index = dwarf2_leb128_as_unsigned(&traverse);
- mod_time = dwarf2_leb128_as_unsigned(&traverse);
- length = dwarf2_leb128_as_unsigned(&traverse);
- dir = *(const char**)vector_at(&dirs, dir_index);
- TRACE("Got file %s/%s (%u,%lu)\n", dir, name, mod_time, length);
- psrc = vector_add(&files, &ctx->pool);
- *psrc = source_new(ctx->module, dir, name);
- }
- traverse.data++;
-
- while (traverse.data < traverse.end_data)
- {
- unsigned long address = 0;
- unsigned file = 1;
- unsigned line = 1;
- unsigned is_stmt = default_stmt;
- BOOL end_sequence = FALSE;
- unsigned opcode, extopcode, i;
-
- while (!end_sequence)
- {
- opcode = dwarf2_parse_byte(&traverse);
- TRACE("Got opcode %x\n", opcode);
-
- if (opcode >= opcode_base)
- {
- unsigned delta = opcode - opcode_base;
-
- address += (delta / line_range) * insn_size;
- line += line_base + (delta % line_range);
- dwarf2_set_line_number(ctx->module, address, &files, file, line);
- }
- else
- {
- switch (opcode)
- {
- case DW_LNS_copy:
- dwarf2_set_line_number(ctx->module, address, &files, file, line);
- break;
- case DW_LNS_advance_pc:
- address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
- break;
- case DW_LNS_advance_line:
- line += dwarf2_leb128_as_signed(&traverse);
- break;
- case DW_LNS_set_file:
- file = dwarf2_leb128_as_unsigned(&traverse);
- break;
- case DW_LNS_set_column:
- dwarf2_leb128_as_unsigned(&traverse);
- break;
- case DW_LNS_negate_stmt:
- is_stmt = !is_stmt;
- break;
- case DW_LNS_set_basic_block:
- break;
- case DW_LNS_const_add_pc:
- address += ((255 - opcode_base) / line_range) * insn_size;
- break;
- case DW_LNS_fixed_advance_pc:
- address += dwarf2_parse_u2(&traverse);
- break;
- case DW_LNS_extended_op:
- dwarf2_leb128_as_unsigned(&traverse);
- extopcode = dwarf2_parse_byte(&traverse);
- switch (extopcode)
- {
- case DW_LNE_end_sequence:
- dwarf2_set_line_number(ctx->module, address, &files, file, line);
- end_sequence = TRUE;
- break;
- case DW_LNE_set_address:
- address = ctx->load_offset + dwarf2_parse_addr(&traverse);
- break;
- case DW_LNE_define_file:
- FIXME("not handled define file %s\n", traverse.data);
- traverse.data += strlen((const char *)traverse.data) + 1;
- dwarf2_leb128_as_unsigned(&traverse);
- dwarf2_leb128_as_unsigned(&traverse);
- dwarf2_leb128_as_unsigned(&traverse);
- break;
- case DW_LNE_set_discriminator:
- {
- unsigned descr;
-
- descr = dwarf2_leb128_as_unsigned(&traverse);
- WARN("not handled discriminator %x\n", descr);
- }
- break;
- default:
- FIXME("Unsupported extended opcode %x\n", extopcode);
- break;
- }
- break;
- default:
- WARN("Unsupported opcode %x\n", opcode);
- for (i = 0; i < opcode_len[opcode]; i++)
- dwarf2_leb128_as_unsigned(&traverse);
- break;
- }
- }
- }
- }
- return TRUE;
-}
-
-static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
- struct module* module,
- const struct elf_thunk_area* thunks,
- dwarf2_traverse_context_t* mod_ctx,
- unsigned long load_offset)
-{
- dwarf2_parse_context_t ctx;
- dwarf2_traverse_context_t abbrev_ctx;
- dwarf2_debug_info_t* di;
- dwarf2_traverse_context_t cu_ctx;
- const unsigned char* comp_unit_start = mod_ctx->data;
- unsigned long cu_length;
- unsigned short cu_version;
- unsigned long cu_abbrev_offset;
- BOOL ret = FALSE;
-
- cu_length = dwarf2_parse_u4(mod_ctx);
- cu_ctx.data = mod_ctx->data;
- cu_ctx.end_data = mod_ctx->data + cu_length;
- mod_ctx->data += cu_length;
- cu_version = dwarf2_parse_u2(&cu_ctx);
- cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
- cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
-
- TRACE("Compilation Unit Header found at 0x%x:\n",
- (int)(comp_unit_start - sections[section_debug].address));
- TRACE("- length: %lu\n", cu_length);
- TRACE("- version: %u\n", cu_version);
- TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
- TRACE("- word_size: %u\n", cu_ctx.word_size);
-
- if (cu_version != 2)
- {
- WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
- cu_version);
- return FALSE;
- }
-
- module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
- mod_ctx->word_size = cu_ctx.word_size;
-
- pool_init(&ctx.pool, 65536);
- ctx.sections = sections;
- ctx.section = section_debug;
- ctx.module = module;
- ctx.thunks = thunks;
- ctx.load_offset = load_offset;
- ctx.ref_offset = comp_unit_start - sections[section_debug].address;
- memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
- ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
- ctx.cpp_name = NULL;
-
- abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
- abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
- abbrev_ctx.word_size = cu_ctx.word_size;
- dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
-
- sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
- dwarf2_read_one_debug_info(&ctx, &cu_ctx, NULL, &di);
-
- if (di->abbrev->tag == DW_TAG_compile_unit)
- {
- struct attribute name;
- struct vector* children;
- dwarf2_debug_info_t* child = NULL;
- unsigned int i;
- struct attribute stmt_list, low_pc;
- struct attribute comp_dir;
-
- if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
- name.u.string = NULL;
-
- /* get working directory of current compilation unit */
- if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
- comp_dir.u.string = NULL;
-
- if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
- low_pc.u.uvalue = 0;
- ctx.compiland = symt_new_compiland(module, ctx.load_offset + low_pc.u.uvalue,
- source_new(module, comp_dir.u.string, name.u.string));
- di->symt = &ctx.compiland->symt;
- children = dwarf2_get_di_children(&ctx, di);
- if (children) for (i = 0; i < vector_length(children); i++)
- {
- child = *(dwarf2_debug_info_t**)vector_at(children, i);
- dwarf2_load_one_entry(&ctx, child);
- }
- if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
- {
-#if defined(__REACTOS__) && defined(__clang__)
- unsigned long stmt_list_val = stmt_list.u.uvalue;
- if (stmt_list_val > module->module.BaseOfImage)
- {
- /* FIXME: Clang is recording this as an address, not an offset */
- stmt_list_val -= module->module.BaseOfImage + sections[section_line].rva;
- }
- if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list_val))
-#else
- if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
-#endif
- module->module.LineNumbers = TRUE;
- }
- ret = TRUE;
- }
- else FIXME("Should have a compilation unit here\n");
- pool_destroy(&ctx.pool);
- return ret;
-}
-
-static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
- unsigned long ip, dwarf2_traverse_context_t* lctx)
-{
- DWORD_PTR beg, end;
- const BYTE* ptr = start;
- DWORD len;
-
- while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
- {
- beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
- end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
- if (!beg && !end) break;
- len = dwarf2_get_u2(ptr); ptr += 2;
-
- if (beg <= ip && ip < end)
- {
- lctx->data = ptr;
- lctx->end_data = ptr + len;
- lctx->word_size = modfmt->u.dwarf2_info->word_size;
- return TRUE;
- }
- ptr += len;
- }
- WARN("Couldn't find ip in location list\n");
- return FALSE;
-}
-
-static enum location_error loc_compute_frame(struct process* pcs,
- const struct module_format* modfmt,
- const struct symt_function* func,
- DWORD_PTR ip, struct location* frame)
-{
- struct symt** psym = NULL;
- struct location* pframe;
- dwarf2_traverse_context_t lctx;
- enum location_error err;
- unsigned int i;
-
- for (i=0; i<vector_length(&func->vchildren); i++)
- {
- psym = vector_at(&func->vchildren, i);
- if ((*psym)->tag == SymTagCustom)
- {
- pframe = &((struct symt_hierarchy_point*)*psym)->loc;
-
- /* First, recompute the frame information, if needed */
- switch (pframe->kind)
- {
- case loc_regrel:
- case loc_register:
- *frame = *pframe;
- break;
- case loc_dwarf2_location_list:
- WARN("Searching loclist for %s\n", func->hash_elt.name);
- if (!dwarf2_lookup_loclist(modfmt,
- modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
- ip, &lctx))
- return loc_err_out_of_scope;
- if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
- if (frame->kind >= loc_user)
- {
- WARN("Couldn't compute runtime frame location\n");
- return loc_err_too_complex;
- }
- break;
- default:
- WARN("Unsupported frame kind %d\n", pframe->kind);
- return loc_err_internal;
- }
- return 0;
- }
- }
- WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
- return loc_err_internal;
-}
-
-enum reg_rule
-{
- RULE_UNSET, /* not set at all */
- RULE_UNDEFINED, /* undefined value */
- RULE_SAME, /* same value as previous frame */
- RULE_CFA_OFFSET, /* stored at cfa offset */
- RULE_OTHER_REG, /* stored in other register */
- RULE_EXPRESSION, /* address specified by expression */
- RULE_VAL_EXPRESSION /* value specified by expression */
-};
-
-/* make it large enough for all CPUs */
-#define NB_FRAME_REGS 64
-#define MAX_SAVED_STATES 16
-
-struct frame_state
-{
- ULONG_PTR cfa_offset;
- unsigned char cfa_reg;
- enum reg_rule cfa_rule;
- enum reg_rule rules[NB_FRAME_REGS];
- ULONG_PTR regs[NB_FRAME_REGS];
-};
-
-struct frame_info
-{
- ULONG_PTR ip;
- ULONG_PTR code_align;
- LONG_PTR data_align;
- unsigned char retaddr_reg;
- unsigned char fde_encoding;
- unsigned char lsda_encoding;
- unsigned char signal_frame;
- unsigned char aug_z_format;
- unsigned char state_sp;
- struct frame_state state;
- struct frame_state state_stack[MAX_SAVED_STATES];
-};
-
-static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding)
-{
- ULONG_PTR base;
-
- if (encoding == DW_EH_PE_omit) return 0;
-
- switch (encoding & 0xf0)
- {
- case DW_EH_PE_abs:
- base = 0;
- break;
- case DW_EH_PE_pcrel:
- base = (ULONG_PTR)ctx->data;
- break;
- default:
- FIXME("unsupported encoding %02x\n", encoding);
- return 0;
- }
-
- switch (encoding & 0x0f)
- {
- case DW_EH_PE_native:
- return base + dwarf2_parse_addr(ctx);
- case DW_EH_PE_leb128:
- return base + dwarf2_leb128_as_unsigned(ctx);
- case DW_EH_PE_data2:
- return base + dwarf2_parse_u2(ctx);
- case DW_EH_PE_data4:
- return base + dwarf2_parse_u4(ctx);
- case DW_EH_PE_data8:
- return base + dwarf2_parse_u8(ctx);
- case DW_EH_PE_signed|DW_EH_PE_leb128:
- return base + dwarf2_leb128_as_signed(ctx);
- case DW_EH_PE_signed|DW_EH_PE_data2:
- return base + (signed short)dwarf2_parse_u2(ctx);
- case DW_EH_PE_signed|DW_EH_PE_data4:
- return base + (signed int)dwarf2_parse_u4(ctx);
- case DW_EH_PE_signed|DW_EH_PE_data8:
- return base + (LONG64)dwarf2_parse_u8(ctx);
- default:
- FIXME("unsupported encoding %02x\n", encoding);
- return 0;
- }
-}
-
-static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info)
-{
- unsigned char version;
- const char* augmentation;
- const unsigned char* end;
- ULONG_PTR len;
-
- memset(info, 0, sizeof(*info));
- info->lsda_encoding = DW_EH_PE_omit;
- info->aug_z_format = 0;
-
- /* parse the CIE first */
- version = dwarf2_parse_byte(ctx);
- if (version != 1 && version != 3 && version != 4)
- {
- FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
- return FALSE;
- }
- augmentation = (const char*)ctx->data;
- ctx->data += strlen(augmentation) + 1;
-
- switch (version)
- {
- case 4:
- /* skip 'address_size' and 'segment_size' */
- ctx->data += 2;
- /* fallthrough */
- case 1:
- case 3:
- info->code_align = dwarf2_leb128_as_unsigned(ctx);
- info->data_align = dwarf2_leb128_as_signed(ctx);
- info->retaddr_reg = version == 1 ? dwarf2_parse_byte(ctx) :dwarf2_leb128_as_unsigned(ctx);
- break;
- default:
- ;
- }
- info->state.cfa_rule = RULE_CFA_OFFSET;
-
- end = NULL;
- TRACE("\tparsing augmentation %s\n", augmentation);
- if (*augmentation) do
- {
- switch (*augmentation)
- {
- case 'z':
- len = dwarf2_leb128_as_unsigned(ctx);
- end = ctx->data + len;
- info->aug_z_format = 1;
- continue;
- case 'L':
- info->lsda_encoding = dwarf2_parse_byte(ctx);
- continue;
- case 'P':
- {
- unsigned char encoding = dwarf2_parse_byte(ctx);
- /* throw away the indirect bit, as we don't care for the result */
- encoding &= ~DW_EH_PE_indirect;
- dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */
- continue;
- }
- case 'R':
- info->fde_encoding = dwarf2_parse_byte(ctx);
- continue;
- case 'S':
- info->signal_frame = 1;
- continue;
- }
- FIXME("unknown augmentation '%c'\n", *augmentation);
- if (!end) return FALSE;
- break;
- } while (*++augmentation);
- if (end) ctx->data = end;
- return TRUE;
-}
-
-static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta,
- dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx,
- struct frame_info* info, BOOL in_eh_frame)
-{
- const unsigned char* ptr_blk;
- const unsigned char* cie_ptr;
- const unsigned char* last_cie_ptr = (const unsigned char*)~0;
- unsigned len, id;
- unsigned long start, range;
- unsigned cie_id;
- const BYTE* start_data = fde_ctx->data;
-
- cie_id = in_eh_frame ? 0 : DW_CIE_ID;
- /* skip 0-padding at beginning of section (alignment) */
- while (fde_ctx->data + 2 * 4 < fde_ctx->end_data)
- {
- if (dwarf2_parse_u4(fde_ctx))
- {
- fde_ctx->data -= 4;
- break;
- }
- }
- for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
- {
- /* find the FDE for address addr (skip CIE) */
- len = dwarf2_parse_u4(fde_ctx);
- if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
- ptr_blk = fde_ctx->data + len;
- id = dwarf2_parse_u4(fde_ctx);
- if (id == cie_id)
- {
- last_cie_ptr = fde_ctx->data - 8;
- /* we need some bits out of the CIE in order to parse all contents */
- if (!parse_cie_details(fde_ctx, info)) return FALSE;
- cie_ctx->data = fde_ctx->data;
- cie_ctx->end_data = ptr_blk;
- cie_ctx->word_size = fde_ctx->word_size;
- continue;
- }
- cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id;
- if (cie_ptr != last_cie_ptr)
- {
- last_cie_ptr = cie_ptr;
- cie_ctx->data = cie_ptr;
- cie_ctx->word_size = fde_ctx->word_size;
- cie_ctx->end_data = cie_ptr + 4;
- cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
- if (dwarf2_parse_u4(cie_ctx) != cie_id)
- {
- FIXME("wrong CIE pointer at %x from FDE %x\n",
- (unsigned)(cie_ptr - start_data),
- (unsigned)(fde_ctx->data - start_data));
- return FALSE;
- }
- if (!parse_cie_details(cie_ctx, info)) return FALSE;
- }
- start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
- range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
-
- if (addr >= start && addr < start + range)
- {
- /* reset the FDE context */
- fde_ctx->end_data = ptr_blk;
-
- info->ip = start;
- return TRUE;
- }
- }
- return FALSE;
-}
-
-static int valid_reg(ULONG_PTR reg)
-{
- if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
- return (reg < NB_FRAME_REGS);
-}
-
-static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
- ULONG_PTR last_ip, struct frame_info *info)
-{
- while (ctx->data < ctx->end_data && info->ip <= last_ip + info->signal_frame)
- {
- enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx);
-
- if (op & 0xc0)
- {
- switch (op & 0xc0)
- {
- case DW_CFA_advance_loc:
- {
- ULONG_PTR offset = (op & 0x3f) * info->code_align;
- TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
- info->ip += offset;
- break;
- }
- case DW_CFA_offset:
- {
- ULONG_PTR reg = op & 0x3f;
- LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align;
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_offset %s, %ld\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
- offset);
- info->state.regs[reg] = offset;
- info->state.rules[reg] = RULE_CFA_OFFSET;
- break;
- }
- case DW_CFA_restore:
- {
- ULONG_PTR reg = op & 0x3f;
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_restore %s\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
- info->state.rules[reg] = RULE_UNSET;
- break;
- }
- }
- }
- else switch (op)
- {
- case DW_CFA_nop:
- break;
- case DW_CFA_set_loc:
- {
- ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
- TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
- info->ip = loc;
- break;
- }
- case DW_CFA_advance_loc1:
- {
- ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
- TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
- info->ip += offset;
- break;
- }
- case DW_CFA_advance_loc2:
- {
- ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
- TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
- info->ip += offset;
- break;
- }
- case DW_CFA_advance_loc4:
- {
- ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
- TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
- info->ip += offset;
- break;
- }
- case DW_CFA_offset_extended:
- case DW_CFA_offset_extended_sf:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align
- : dwarf2_leb128_as_signed(ctx) * info->data_align;
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
- offset);
- info->state.regs[reg] = offset;
- info->state.rules[reg] = RULE_CFA_OFFSET;
- break;
- }
- case DW_CFA_restore_extended:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_restore_extended %s\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
- info->state.rules[reg] = RULE_UNSET;
- break;
- }
- case DW_CFA_undefined:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_undefined %s\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
- info->state.rules[reg] = RULE_UNDEFINED;
- break;
- }
- case DW_CFA_same_value:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_same_value %s\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
- info->state.regs[reg] = reg;
- info->state.rules[reg] = RULE_SAME;
- break;
- }
- case DW_CFA_register:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx);
- if (!valid_reg(reg) || !valid_reg(reg2)) break;
- TRACE("%lx: DW_CFA_register %s == %s\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2, TRUE)));
- info->state.regs[reg] = reg2;
- info->state.rules[reg] = RULE_OTHER_REG;
- break;
- }
- case DW_CFA_remember_state:
- TRACE("%lx: DW_CFA_remember_state\n", info->ip);
- if (info->state_sp >= MAX_SAVED_STATES)
- FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip);
- else
- info->state_stack[info->state_sp++] = info->state;
- break;
- case DW_CFA_restore_state:
- TRACE("%lx: DW_CFA_restore_state\n", info->ip);
- if (!info->state_sp)
- FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip);
- else
- info->state = info->state_stack[--info->state_sp];
- break;
- case DW_CFA_def_cfa:
- case DW_CFA_def_cfa_sf:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx)
- : dwarf2_leb128_as_signed(ctx) * info->data_align;
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_def_cfa %s, %ld\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
- offset);
- info->state.cfa_reg = reg;
- info->state.cfa_offset = offset;
- info->state.cfa_rule = RULE_CFA_OFFSET;
- break;
- }
- case DW_CFA_def_cfa_register:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_def_cfa_register %s\n",
- info->ip,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
- info->state.cfa_reg = reg;
- info->state.cfa_rule = RULE_CFA_OFFSET;
- break;
- }
- case DW_CFA_def_cfa_offset:
- case DW_CFA_def_cfa_offset_sf:
- {
- ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx)
- : dwarf2_leb128_as_signed(ctx) * info->data_align;
- TRACE("%lx: DW_CFA_def_cfa_offset %ld\n", info->ip, offset);
- info->state.cfa_offset = offset;
- info->state.cfa_rule = RULE_CFA_OFFSET;
- break;
- }
- case DW_CFA_def_cfa_expression:
- {
- ULONG_PTR expr = (ULONG_PTR)ctx->data;
- ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
- TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
- info->state.cfa_offset = expr;
- info->state.cfa_rule = RULE_VAL_EXPRESSION;
- ctx->data += len;
- break;
- }
- case DW_CFA_expression:
- case DW_CFA_val_expression:
- {
- ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
- ULONG_PTR expr = (ULONG_PTR)ctx->data;
- ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
- if (!valid_reg(reg)) break;
- TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
- info->ip, (op == DW_CFA_expression) ? "" : "val_",
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
- expr, expr + len);
- info->state.regs[reg] = expr;
- info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
- ctx->data += len;
- break;
- }
- case DW_CFA_GNU_args_size:
- /* FIXME: should check that GCC is the compiler for this CU */
- {
- ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx);
- TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args);
- /* ignored */
- break;
- }
- default:
- FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
- break;
- }
- }
-}
-
-/* retrieve a context register from its dwarf number */
-static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
-{
- unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz;
- ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
-
- if (sz != sizeof(ULONG_PTR))
- {
- FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
- return 0;
- }
- return *ptr;
-}
-
-/* set a context register from its dwarf number */
-static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg,
- ULONG_PTR val, BOOL isdebuggee)
-{
- unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz;
- ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
-
- if (isdebuggee)
- {
- char tmp[16];
-
- if (sz > sizeof(tmp))
- {
- FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz);
- return;
- }
- if (!sw_read_mem(csw, val, tmp, sz))
- {
- WARN("Couldn't read memory at %p\n", (void*)val);
- return;
- }
- memcpy(ptr, tmp, sz);
- }
- else
- {
- if (sz != sizeof(ULONG_PTR))
- {
- FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
- return;
- }
- *ptr = val;
- }
-}
-
-/* copy a register from one context to another using dwarf number */
-static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc)
-{
- unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst, TRUE), szdst;
- unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc, TRUE), szsrc;
- ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst);
- ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc);
-
- if (szdst != szsrc)
- {
- FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n",
- dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst);
- return;
- }
- memcpy(ptrdst, ptrsrc, szdst);
-}
-
-static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw,
- const unsigned char* zp, CONTEXT *context)
-{
- dwarf2_traverse_context_t ctx;
- ULONG_PTR reg, sz, tmp, stack[64];
- int sp = -1;
- ULONG_PTR len;
-
- ctx.data = zp;
- ctx.end_data = zp + 4;
- len = dwarf2_leb128_as_unsigned(&ctx);
- ctx.end_data = ctx.data + len;
- ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
-
- while (ctx.data < ctx.end_data)
- {
- unsigned char opcode = dwarf2_parse_byte(&ctx);
-
- if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
- stack[++sp] = opcode - DW_OP_lit0;
- else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
- stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0);
- else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
- stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx);
- else switch (opcode)
- {
- case DW_OP_nop: break;
- case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break;
- case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break;
- case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break;
- case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break;
- case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break;
- case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break;
- case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break;
- case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break;
- case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break;
- case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break;
- case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break;
- case DW_OP_deref:
- if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp)))
- {
- ERR("Couldn't read memory at %lx\n", stack[sp]);
- tmp = 0;
- }
- stack[sp] = tmp;
- break;
- case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
- case DW_OP_drop: sp--; break;
- case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
- case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break;
- case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
- case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
- case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
- case DW_OP_neg: stack[sp] = -stack[sp]; break;
- case DW_OP_not: stack[sp] = ~stack[sp]; break;
- case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
- case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
- case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
- case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
- case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
- case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
- case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
- case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
- case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break;
- case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
- case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
- case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
- case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
- case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
- case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
- case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
- case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
- case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
- case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break;
- case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break;
- case DW_OP_GNU_encoded_addr:
- tmp = dwarf2_parse_byte(&ctx);
- stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp);
- break;
- case DW_OP_regx:
- stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx));
- break;
- case DW_OP_bregx:
- reg = dwarf2_leb128_as_unsigned(&ctx);
- tmp = dwarf2_leb128_as_signed(&ctx);
- stack[++sp] = get_context_reg(context, reg) + tmp;
- break;
- case DW_OP_deref_size:
- sz = dwarf2_parse_byte(&ctx);
- if (!sw_read_mem(csw, stack[sp], &tmp, sz))
- {
- ERR("Couldn't read memory at %lx\n", stack[sp]);
- tmp = 0;
- }
- /* do integral promotion */
- switch (sz)
- {
- case 1: stack[sp] = *(unsigned char*)&tmp; break;
- case 2: stack[sp] = *(unsigned short*)&tmp; break;
- case 4: stack[sp] = *(unsigned int*)&tmp; break;
- case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */
- default: FIXME("Unknown size for deref 0x%lx\n", sz);
- }
- break;
- default:
- FIXME("unhandled opcode %02x\n", opcode);
- }
- }
- return stack[sp];
-}
-
-static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw,
- CONTEXT *context, struct frame_state *state, ULONG_PTR* cfa)
-{
- unsigned int i;
- ULONG_PTR value;
- CONTEXT new_context = *context;
-
- switch (state->cfa_rule)
- {
- case RULE_EXPRESSION:
- *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
- if (!sw_read_mem(csw, *cfa, cfa, sizeof(*cfa)))
- {
- WARN("Couldn't read memory at %p\n", (void*)*cfa);
- return;
- }
- break;
- case RULE_VAL_EXPRESSION:
- *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
- break;
- default:
- *cfa = get_context_reg(context, state->cfa_reg) + state->cfa_offset;
- break;
- }
- if (!*cfa) return;
-
- for (i = 0; i < NB_FRAME_REGS; i++)
- {
- switch (state->rules[i])
- {
- case RULE_UNSET:
- case RULE_UNDEFINED:
- case RULE_SAME:
- break;
- case RULE_CFA_OFFSET:
- set_context_reg(csw, &new_context, i, *cfa + state->regs[i], TRUE);
- break;
- case RULE_OTHER_REG:
- copy_context_reg(&new_context, i, context, state->regs[i]);
- break;
- case RULE_EXPRESSION:
- value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
- set_context_reg(csw, &new_context, i, value, TRUE);
- break;
- case RULE_VAL_EXPRESSION:
- value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
- set_context_reg(csw, &new_context, i, value, FALSE);
- break;
- }
- }
- *context = new_context;
-}
-
-/***********************************************************************
- * dwarf2_virtual_unwind
- *
- */
-BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa)
-{
- struct module_pair pair;
- struct frame_info info;
- dwarf2_traverse_context_t cie_ctx, fde_ctx;
- struct module_format* modfmt;
- const unsigned char* end;
- DWORD_PTR delta;
-
- if (!(pair.pcs = process_find_by_handle(csw->hProcess)) ||
- !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) ||
- !module_get_debug(&pair))
- return FALSE;
- modfmt = pair.effective->format_info[DFI_DWARF];
- if (!modfmt) return FALSE;
- memset(&info, 0, sizeof(info));
- fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address;
- fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size;
- fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
- /* let offsets relative to the eh_frame sections be correctly computed, as we'll map
- * in this process the IMAGE section at a different address as the one expected by
- * the image
- */
- delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva -
- (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address;
- if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE))
- {
- fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address;
- fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size;
- fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
- delta = pair.effective->reloc_delta;
- if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE))
- {
- TRACE("Couldn't find information for %lx\n", ip);
- return FALSE;
- }
- }
-
- TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n",
- ip, info.ip, info.code_align, info.data_align,
- dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg, TRUE)));
-
- /* if at very beginning of function, return and use default unwinder */
- if (ip == info.ip) return FALSE;
- execute_cfa_instructions(&cie_ctx, ip, &info);
-
- if (info.aug_z_format) /* get length of augmentation data */
- {
- ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx);
- end = fde_ctx.data + len;
- }
- else end = NULL;
- dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */
- if (end) fde_ctx.data = end;
-
- execute_cfa_instructions(&fde_ctx, ip, &info);
-
- /* if there is no information about retaddr, use default unwinder */
- if (info.state.rules[info.retaddr_reg] == RULE_UNSET) return FALSE;
-
- apply_frame_state(pair.effective, csw, context, &info.state, cfa);
-
- return TRUE;
-}
-
-static void dwarf2_location_compute(struct process* pcs,
- const struct module_format* modfmt,
- const struct symt_function* func,
- struct location* loc)
-{
- struct location frame;
- DWORD_PTR ip;
- int err;
- dwarf2_traverse_context_t lctx;
-
- if (!func->container || func->container->tag != SymTagCompiland)
- {
- WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
- err = loc_err_internal;
- }
- else
- {
- /* instruction pointer relative to compiland's start */
- ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
-
- if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0)
- {
- switch (loc->kind)
- {
- case loc_dwarf2_location_list:
- /* Then, if the variable has a location list, find it !! */
- if (dwarf2_lookup_loclist(modfmt,
- modfmt->u.dwarf2_info->debug_loc.address + loc->offset,
- ip, &lctx))
- goto do_compute;
- err = loc_err_out_of_scope;
- break;
- case loc_dwarf2_block:
- /* or if we have a copy of an existing block, get ready for it */
- {
- unsigned* ptr = (unsigned*)loc->offset;
-
- lctx.data = (const BYTE*)(ptr + 1);
- lctx.end_data = lctx.data + *ptr;
- lctx.word_size = modfmt->u.dwarf2_info->word_size;
- }
- do_compute:
- /* now get the variable */
- err = compute_location(&lctx, loc, pcs->handle, &frame);
- break;
- case loc_register:
- case loc_regrel:
- /* nothing to do */
- break;
- default:
- WARN("Unsupported local kind %d\n", loc->kind);
- err = loc_err_internal;
- }
- }
- }
- if (err < 0)
- {
- loc->kind = loc_register;
- loc->reg = err;
- }
-}
-
-#ifdef HAVE_ZLIB
-static void *zalloc(void *priv, uInt items, uInt sz)
-{
- return HeapAlloc(GetProcessHeap(), 0, items * sz);
-}
-
-static void zfree(void *priv, void *addr)
-{
- HeapFree(GetProcessHeap(), 0, addr);
-}
-
-static inline BOOL dwarf2_init_zsection(dwarf2_section_t* section,
- const char* zsectname,
- struct image_section_map* ism)
-{
- z_stream z;
- LARGE_INTEGER li;
- int res;
- BOOL ret = FALSE;
-
- BYTE *addr, *sect = (BYTE *)image_map_section(ism);
- size_t sz = image_get_map_size(ism);
-
- if (sz <= 12 || memcmp(sect, "ZLIB", 4))
- {
- ERR("invalid compressed section %s\n", zsectname);
- goto out;
- }
-
-#ifdef WORDS_BIGENDIAN
- li.u.HighPart = *(DWORD*)§[4];
- li.u.LowPart = *(DWORD*)§[8];
-#else
- li.u.HighPart = RtlUlongByteSwap(*(DWORD*)§[4]);
- li.u.LowPart = RtlUlongByteSwap(*(DWORD*)§[8]);
-#endif
-
- addr = HeapAlloc(GetProcessHeap(), 0, li.QuadPart);
- if (!addr)
- goto out;
-
- z.next_in = §[12];
- z.avail_in = sz - 12;
- z.opaque = NULL;
- z.zalloc = zalloc;
- z.zfree = zfree;
-
- res = inflateInit(&z);
- if (res != Z_OK)
- {
- FIXME("inflateInit failed with %i / %s\n", res, z.msg);
- goto out_free;
- }
-
- do {
- z.next_out = addr + z.total_out;
- z.avail_out = li.QuadPart - z.total_out;
- res = inflate(&z, Z_FINISH);
- } while (z.avail_in && res == Z_STREAM_END);
-
- if (res != Z_STREAM_END)
- {
- FIXME("Decompression failed with %i / %s\n", res, z.msg);
- goto out_end;
- }
-
- ret = TRUE;
- section->compressed = TRUE;
- section->address = addr;
- section->rva = image_get_map_rva(ism);
- section->size = z.total_out;
-
-out_end:
- inflateEnd(&z);
-out_free:
- if (!ret)
- HeapFree(GetProcessHeap(), 0, addr);
-out:
- image_unmap_section(ism);
- return ret;
-}
-
-#endif
-
-static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap,
- const char* sectname, const char* zsectname,
- struct image_section_map* ism)
-{
- struct image_section_map local_ism;
-
- if (!ism) ism = &local_ism;
-
- section->compressed = FALSE;
- if (image_find_section(fmap, sectname, ism))
- {
- section->address = (const BYTE*)image_map_section(ism);
- section->size = image_get_map_size(ism);
- section->rva = image_get_map_rva(ism);
- return TRUE;
- }
-
- section->address = NULL;
- section->size = 0;
- section->rva = 0;
-
- if (zsectname && image_find_section(fmap, zsectname, ism))
- {
-#ifdef HAVE_ZLIB
- return dwarf2_init_zsection(section, zsectname, ism);
-#else
- FIXME("dbghelp not built with zlib, but compressed section found\n" );
-#endif
- }
-
- return FALSE;
-}
-
-static inline void dwarf2_fini_section(dwarf2_section_t* section)
-{
- if (section->compressed)
- HeapFree(GetProcessHeap(), 0, (void*)section->address);
-}
-
-static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt)
-{
- dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_loc);
- dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_frame);
- HeapFree(GetProcessHeap(), 0, modfmt);
-}
-
-BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
- const struct elf_thunk_area* thunks,
- struct image_file_map* fmap)
-{
- dwarf2_section_t eh_frame, section[section_max];
- dwarf2_traverse_context_t mod_ctx;
- struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
- debug_line_sect, debug_ranges_sect, eh_frame_sect;
- BOOL ret = TRUE;
- struct module_format* dwarf2_modfmt;
-
- dwarf2_init_section(&eh_frame, fmap, ".eh_frame", NULL, &eh_frame_sect);
- dwarf2_init_section(§ion[section_debug], fmap, ".debug_info", ".zdebug_info", &debug_sect);
- dwarf2_init_section(§ion[section_abbrev], fmap, ".debug_abbrev", ".zdebug_abbrev", &debug_abbrev_sect);
- dwarf2_init_section(§ion[section_string], fmap, ".debug_str", ".zdebug_str", &debug_str_sect);
- dwarf2_init_section(§ion[section_line], fmap, ".debug_line", ".zdebug_line", &debug_line_sect);
- dwarf2_init_section(§ion[section_ranges], fmap, ".debug_ranges", ".zdebug_ranges", &debug_ranges_sect);
-
- /* to do anything useful we need either .eh_frame or .debug_info */
- if ((!eh_frame.address || eh_frame.address == IMAGE_NO_MAP) &&
- (!section[section_debug].address || section[section_debug].address == IMAGE_NO_MAP))
- {
- ret = FALSE;
- goto leave;
- }
-
- if (fmap->modtype == DMT_ELF && debug_sect.fmap)
- {
- /* debug info might have a different base address than .so file
- * when elf file is prelinked after splitting off debug info
- * adjust symbol base addresses accordingly
- */
- load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start;
- }
-
- TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
-
- mod_ctx.data = section[section_debug].address;
- mod_ctx.end_data = mod_ctx.data + section[section_debug].size;
- mod_ctx.word_size = 0; /* will be correctly set later on */
-
- dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0,
- sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info));
- if (!dwarf2_modfmt)
- {
- ret = FALSE;
- goto leave;
- }
- dwarf2_modfmt->module = module;
- dwarf2_modfmt->remove = dwarf2_module_remove;
- dwarf2_modfmt->loc_compute = dwarf2_location_compute;
- dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1);
- dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */
- dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt;
-
- /* As we'll need later some sections' content, we won't unmap these
- * sections upon existing this function
- */
- dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", ".zdebug_loc", NULL);
- dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", ".zdebug_frame", NULL);
- dwarf2_modfmt->u.dwarf2_info->eh_frame = eh_frame;
-
- while (mod_ctx.data < mod_ctx.end_data)
- {
- dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset);
- }
- dwarf2_modfmt->module->module.SymType = SymDia;
- dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
- /* FIXME: we could have a finer grain here */
- dwarf2_modfmt->module->module.GlobalSymbols = TRUE;
- dwarf2_modfmt->module->module.TypeInfo = TRUE;
- dwarf2_modfmt->module->module.SourceIndexed = TRUE;
- dwarf2_modfmt->module->module.Publics = TRUE;
-
- /* set the word_size for eh_frame parsing */
- dwarf2_modfmt->u.dwarf2_info->word_size = fmap->addr_size / 8;
-
-leave:
- dwarf2_fini_section(§ion[section_debug]);
- dwarf2_fini_section(§ion[section_abbrev]);
- dwarf2_fini_section(§ion[section_string]);
- dwarf2_fini_section(§ion[section_line]);
- dwarf2_fini_section(§ion[section_ranges]);
-
- image_unmap_section(&debug_sect);
- image_unmap_section(&debug_abbrev_sect);
- image_unmap_section(&debug_str_sect);
- image_unmap_section(&debug_line_sect);
- image_unmap_section(&debug_ranges_sect);
- if (!ret) image_unmap_section(&eh_frame_sect);
-
- return ret;
-}
projects / reactos.git / blobdiff