reactos/lib/sdk/crt/setjmp/amd64/setjmp.s

   1 /*
   2  * COPYRIGHT:         See COPYING in the top level directory
   3  * PROJECT:           ReactOS system libraries
   4  * PURPOSE:           Implementation of _setjmp/longjmp
   5  * FILE:              lib/sdk/crt/setjmp/amd64/setjmp.s
   6  * PROGRAMMER:        Timo Kreuzer (timo.kreuzer@reactos.org)
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include <reactos/asm.h>
  12 #include <ndk/amd64/asm.h>
  13
  14 #define JUMP_BUFFER_Frame 0x00
  15 #define JUMP_BUFFER_Rbx   0x08
  16 #define JUMP_BUFFER_Rsp   0x10
  17 #define JUMP_BUFFER_Rbp   0x18
  18 #define JUMP_BUFFER_Rsi   0x20
  19 #define JUMP_BUFFER_Rdi   0x28
  20 #define JUMP_BUFFER_R12   0x30
  21 #define JUMP_BUFFER_R13   0x38
  22 #define JUMP_BUFFER_R14   0x40
  23 #define JUMP_BUFFER_R15   0x48
  24 #define JUMP_BUFFER_Rip   0x50
  25 #define JUMP_BUFFER_Spare 0x58
  26 #define JUMP_BUFFER_Xmm6  0x60
  27 #define JUMP_BUFFER_Xmm7  0x70
  28 #define JUMP_BUFFER_Xmm8  0x80
  29 #define JUMP_BUFFER_Xmm9  0x90
  30 #define JUMP_BUFFER_Xmm10 0xa0
  31 #define JUMP_BUFFER_Xmm11 0xb0
  32 #define JUMP_BUFFER_Xmm12 0xc0
  33 #define JUMP_BUFFER_Xmm13 0xd0
  34 #define JUMP_BUFFER_Xmm14 0xe0
  35 #define JUMP_BUFFER_Xmm15 0xf0
  36
  37
  38 /* FUNCTIONS ******************************************************************/
  39
  40 /*
  41  * int _setjmp(jmp_buf env);
  42  *
  43  * Parameters: <rcx> - jmp_buf env
  44  * Returns:    0
  45  * Notes:      Sets up the jmp_buf
  46  */
  47 PUBLIC _setjmp
  48 .proc _setjmp
  49     /* Load rsp as it was before the call into rax */
  50     lea rax, [rsp + 8]
  51     /* Load return address into r8 */
  52     mov r8, [rsp]
  53     mov qword ptr [rcx + JUMP_BUFFER_Frame], 0
  54     mov [rcx + JUMP_BUFFER_Rbx], rbx
  55     mov [rcx + JUMP_BUFFER_Rbp], rbp
  56     mov [rcx + JUMP_BUFFER_Rsi], rsi
  57     mov [rcx + JUMP_BUFFER_Rdi], rdi
  58     mov [rcx + JUMP_BUFFER_R12], r12
  59     mov [rcx + JUMP_BUFFER_R13], r13
  60     mov [rcx + JUMP_BUFFER_R14], r14
  61     mov [rcx + JUMP_BUFFER_R15], r15
  62     mov [rcx + JUMP_BUFFER_Rsp], rax
  63     mov [rcx + JUMP_BUFFER_Rip], r8
  64     movdqa [rcx + JUMP_BUFFER_Xmm6], xmm6
  65     movdqa [rcx + JUMP_BUFFER_Xmm7], xmm7
  66     movdqa [rcx + JUMP_BUFFER_Xmm8], xmm8
  67     movdqa [rcx + JUMP_BUFFER_Xmm9], xmm9
  68     movdqa [rcx + JUMP_BUFFER_Xmm10], xmm10
  69     movdqa [rcx + JUMP_BUFFER_Xmm11], xmm11
  70     movdqa [rcx + JUMP_BUFFER_Xmm12], xmm12
  71     movdqa [rcx + JUMP_BUFFER_Xmm13], xmm13
  72     movdqa [rcx + JUMP_BUFFER_Xmm14], xmm14
  73     movdqa [rcx + JUMP_BUFFER_Xmm15], xmm15
  74     xor rax, rax
  75     ret
  76 .endp setjmp
  77
  78 /*
  79  * int _setjmpex(jmp_buf _Buf,void *_Ctx);
  80  *
  81  * Parameters: <rcx> - jmp_buf env
  82  *             <rdx> - frame
  83  * Returns:    0
  84  * Notes:      Sets up the jmp_buf
  85  */
  86 PUBLIC _setjmpex
  87 .proc _setjmpex
  88     /* Load rsp as it was before the call into rax */
  89     lea rax, [rsp + 8]
  90     /* Load return address into r8 */
  91     mov r8, [rsp]
  92     mov [rcx + JUMP_BUFFER_Frame], rdx
  93     mov [rcx + JUMP_BUFFER_Rbx], rbx
  94     mov [rcx + JUMP_BUFFER_Rbp], rbp
  95     mov [rcx + JUMP_BUFFER_Rsi], rsi
  96     mov [rcx + JUMP_BUFFER_Rdi], rdi
  97     mov [rcx + JUMP_BUFFER_R12], r12
  98     mov [rcx + JUMP_BUFFER_R13], r13
  99     mov [rcx + JUMP_BUFFER_R14], r14
 100     mov [rcx + JUMP_BUFFER_R15], r15
 101     mov [rcx + JUMP_BUFFER_Rsp], rax
 102     mov [rcx + JUMP_BUFFER_Rip], r8
 103     movdqa [rcx + JUMP_BUFFER_Xmm6], xmm6
 104     movdqa [rcx + JUMP_BUFFER_Xmm7], xmm7
 105     movdqa [rcx + JUMP_BUFFER_Xmm8], xmm8
 106     movdqa [rcx + JUMP_BUFFER_Xmm9], xmm9
 107     movdqa [rcx + JUMP_BUFFER_Xmm10], xmm10
 108     movdqa [rcx + JUMP_BUFFER_Xmm11], xmm11
 109     movdqa [rcx + JUMP_BUFFER_Xmm12], xmm12
 110     movdqa [rcx + JUMP_BUFFER_Xmm13], xmm13
 111     movdqa [rcx + JUMP_BUFFER_Xmm14], xmm14
 112     movdqa [rcx + JUMP_BUFFER_Xmm15], xmm15
 113     xor rax, rax
 114     ret
 115 .endp setjmpex
 116
 117
 118 /*
 119  * void longjmp(jmp_buf env, int value);
 120  *
 121  * Parameters: <rcx> - jmp_buf setup by _setjmp
 122  *             <rdx> - int     value to return
 123  * Returns:    Doesn't return
 124  * Notes:      Non-local goto
 125  */
 126 PUBLIC longjmp
 127 .proc longjmp
 128
 129     // FIXME: handle frame
 130
 131     mov rbx, [rcx + JUMP_BUFFER_Rbx]
 132     mov rbp, [rcx + JUMP_BUFFER_Rbp]
 133     mov rsi, [rcx + JUMP_BUFFER_Rsi]
 134     mov rdi, [rcx + JUMP_BUFFER_Rdi]
 135     mov r12, [rcx + JUMP_BUFFER_R12]
 136     mov r13, [rcx + JUMP_BUFFER_R13]
 137     mov r14, [rcx + JUMP_BUFFER_R14]
 138     mov r15, [rcx + JUMP_BUFFER_R15]
 139     mov rsp, [rcx + JUMP_BUFFER_Rsp]
 140     mov r8, [rcx + JUMP_BUFFER_Rip]
 141     movdqa xmm6, [rcx + JUMP_BUFFER_Xmm6]
 142     movdqa xmm7, [rcx + JUMP_BUFFER_Xmm7]
 143     movdqa xmm8, [rcx + JUMP_BUFFER_Xmm8]
 144     movdqa xmm9, [rcx + JUMP_BUFFER_Xmm9]
 145     movdqa xmm10, [rcx + JUMP_BUFFER_Xmm10]
 146     movdqa xmm11, [rcx + JUMP_BUFFER_Xmm11]
 147     movdqa xmm12, [rcx + JUMP_BUFFER_Xmm12]
 148     movdqa xmm13, [rcx + JUMP_BUFFER_Xmm13]
 149     movdqa xmm14, [rcx + JUMP_BUFFER_Xmm14]
 150     movdqa xmm15, [rcx + JUMP_BUFFER_Xmm15]
 151
 152     /* return param2 or 1 if it was 0 */
 153     mov rax, rdx
 154     test rax, rax
 155     jnz 2f
 156     inc rax
 157 2:  jmp r8
 158 .endp longjmp