.section .text
- .globl setup_bats
_start:
.long 0xe00000 + 12
lis %r10,0xe00000@ha
stw %r5,ofw_call_addr - _start@l(%r10)
- bl setup_bats
-
lis %r3,0xe00000@ha
addi %r3,%r3,freeldr_banner - _start
bl ofw_print_eol
+ /* Claim enough bytes to place freeldr at 0x8000 */
+ lis %r3,0x8000@ha
+ addi %r3,%r3,0x8000@l
+
+ lis %r4,_binary_freeldr_tmp_end@ha
+ addi %r4,%r4,_binary_freeldr_tmp_end@l
+ lis %r5,_binary_freeldr_tmp_start@ha
+ addi %r5,%r5,_binary_freeldr_tmp_start@l
+ sub %r4,%r4,%r5
+
+ xor %r5,%r5,%r5
+ li %r5,0x1000
+
+ bl ofw_claim
+
lis %r4,_binary_freeldr_tmp_end@ha
addi %r4,%r4,_binary_freeldr_tmp_end@l
lis %r3,_binary_freeldr_tmp_start@ha
lis %r5,0x8000@ha
addi %r5,%r5,0x8000@l
- bl ofw_print_regs
+ bl ofw_dumpregs
bl copy_bits
bl zero_registers
-/* bl setup_exc */
-
/* Zero CTR */
mtcr %r31
-
+
lis %r3,0x8000@ha
addi %r3,%r3,0x8000@l
mtlr %r3
-
- lis %r3,call_ofw@ha
- addi %r3,%r3,call_ofw - _start
-
+
+ lis %r3,call_freeldr@ha
+ addi %r3,%r3,call_freeldr - _start
+
blr
/*
isync
blr
- .align 4
-call_freeldr:
- /* Get the address of the functions list --
- * Note:
- * Because of little endian switch we must use an even number of
- * instructions here.. Pad with a nop if needed. */
- mfmsr %r10
- ori %r10,%r10,1
- mtmsr %r10
-
- nop
-
- /* Note that this is little-endian from here on */
- blr
- nop
-
- .align 4
-call_ofw:
- /* R3 has the function offset to call (n * 4)
- * Other arg registers are unchanged.
- * Note that these 4 instructions are in reverse order due to
- * little-endian convention */
- andi. %r0,%r0,65534
- mfmsr %r0
- mtmsr %r0
- /* Now normal ordering resumes */
- subi %r1,%r1,0x100
-
- stw %r8,4(%r1)
- stw %r9,8(%r1)
- stw %r10,12(%r1)
- mflr %r8
- stw %r8,16(%r1)
-
- lis %r10,0xe00000@ha
- add %r9,%r3,%r10
- lwz %r3,ofw_functions - _start@l(%r9)
- mtctr %r3
-
- mr %r3,%r4
- mr %r4,%r5
- mr %r5,%r6
- mr %r6,%r7
- mr %r7,%r8
-
- /* Goto the swapped function */
- bctrl
-
- lwz %r8,16(%r1)
- mtlr %r8
-
- lwz %r8,4(%r1)
- lwz %r9,8(%r1)
- lwz %r10,12(%r1)
-
- addi %r1,%r1,0x100
- /* Ok, go back to little endian */
- mfmsr %r0
- ori %r0,%r0,1
- mtmsr %r0
-
- /* Note that this is little-endian from here on */
- blr
- nop
-
zero_registers:
xor %r2,%r2,%r2
mr %r0,%r2
blr
-prim_strlen:
- mr %r5,%r3
-prim_strlen_loop:
- lbz %r4,0(%r3)
- cmpi 0,0,%r4,0
- beq prim_strlen_done
- addi %r3,%r3,1
- b prim_strlen_loop
-
-prim_strlen_done:
- sub %r3,%r3,%r5
- blr
-
-copy_bits:
- cmp 0,0,%r3,%r4
- beqlr
- lwz %r6,0(%r3)
- stw %r6,0(%r5)
- addi %r3,%r3,4
- addi %r5,%r5,4
- b copy_bits
-
-ofw_print_string_hook:
- bl ofw_print_number
- bl ofw_exit
-
-ofw_print_string:
- /* Reserve some stack space */
- subi %r1,%r1,32
-
- /* Save args */
- stw %r3,0(%r1)
-
- /* Save the lr, a scratch register */
- stw %r8,8(%r1)
- mflr %r8
- stw %r8,12(%r1)
-
- /* Load the package name */
- lis %r3,0xe00000@ha
- addi %r3,%r3,ofw_chosen_name - _start
-
- /* Fire */
- bl ofw_finddevice
-
- /* Load up for getprop */
- stw %r3,16(%r1)
-
- lis %r4,0xe00000@ha
- addi %r4,%r4,ofw_stdout_name - _start
-
- addi %r5,%r1,20
-
- li %r6,4
-
- bl ofw_getprop
-
- /* Measure the string and remember the length */
- lwz %r3,0(%r1)
- bl prim_strlen
- mr %r5,%r3
-
- lwz %r3,20(%r1)
- lwz %r4,0(%r1)
-
- /* Write the string */
- bl ofw_write
-
- /* Return */
- lwz %r8,12(%r1)
- mtlr %r8
- lwz %r8,8(%r1)
-
- addi %r1,%r1,32
- blr
-
- /* Print 8 hex digits representing a number in r3 */
-ofw_print_number:
- subi %r1,%r1,32
- stw %r8,0(%r1)
- mflr %r8
- stw %r8,4(%r1)
- stw %r9,8(%r1)
-
- xor %r9,%r9,%r9
- stw %r9,12(%r1)
-
- /* Set up and, devide, shift */
- mr %r8,%r3
- lis %r6,0xf0000000@ha
- lis %r7,0x10000000@ha
- li %r9,8
-
-ofw_number_loop:
- nop
- cmpi 0,0,%r9,0
- beq ofw_number_return
- subi %r9,%r9,1
-
- /* Body: isolate digit, divide, print */
- and %r5,%r6,%r8
- divwu %r4,%r5,%r7
- srwi %r6,%r6,4
- srwi %r7,%r7,4
-
- nop
-
- cmpi 0,0,%r4,10
- bge ofw_number_letter
- addi %r4,%r4,'0'
- b ofw_number_digit_out
-
-ofw_number_letter:
- addi %r4,%r4,'A' - 10
-
-ofw_number_digit_out:
- stb %r4,12(%r1)
- addi %r3,%r1,12
-
- stw %r6,16(%r1)
- stw %r7,20(%r1)
- stw %r8,24(%r1)
- stw %r9,28(%r1)
-
- bl ofw_print_string
-
- lwz %r6,16(%r1)
- lwz %r7,20(%r1)
- lwz %r8,24(%r1)
- lwz %r9,28(%r1)
-
- b ofw_number_loop
-
-ofw_number_return:
- /* Return */
- lwz %r9,8(%r1)
- lwz %r8,4(%r1)
- mtlr %r8
- lwz %r8,0(%r1)
- addi %r1,%r1,32
- blr
-
-ofw_print_eol:
- subi %r1,%r1,16
- stw %r8,0(%r1)
- mflr %r8
- stw %r8,4(%r1)
- li %r4,0x0d0a
- sth %r4,8(%r1)
- xor %r4,%r4,%r4
- sth %r4,10(%r1)
- addi %r3,%r1,8
- bl ofw_print_string
- lwz %r8,4(%r1)
- mtlr %r8
- lwz %r8,0(%r1)
- addi %r1,%r1,16
- blr
-
-ofw_print_nothing:
- subi %r1,%r1,16
- stw %r8,0(%r1)
- mflr %r8
- stw %r8,4(%r1)
- li %r4,0
- sth %r4,8(%r1)
- xor %r4,%r4,%r4
- sth %r4,10(%r1)
- addi %r3,%r1,8
- bl ofw_print_string
- lwz %r8,4(%r1)
- mtlr %r8
- lwz %r8,0(%r1)
- addi %r1,%r1,16
- blr
-
-ofw_print_space:
- subi %r1,%r1,16
- stw %r8,0(%r1)
- mflr %r8
- stw %r8,4(%r1)
- li %r4,0x2000
- sth %r4,8(%r1)
- xor %r4,%r4,%r4
- sth %r4,10(%r1)
- addi %r3,%r1,8
- bl ofw_print_string
- lwz %r8,4(%r1)
- mtlr %r8
- lwz %r8,0(%r1)
- addi %r1,%r1,16
- blr
-
-ofw_print_regs:
- /* Construct ofw exit call */
- subi %r1,%r1,0xa0
-
- stw %r0,0(%r1)
- stw %r1,4(%r1)
- stw %r2,8(%r1)
- stw %r3,12(%r1)
-
- stw %r4,16(%r1)
- stw %r5,20(%r1)
- stw %r6,24(%r1)
- stw %r7,28(%r1)
-
- stw %r8,32(%r1)
- stw %r9,36(%r1)
- stw %r10,40(%r1)
- stw %r11,44(%r1)
-
- stw %r12,48(%r1)
- stw %r13,52(%r1)
- stw %r14,56(%r1)
- stw %r15,60(%r1)
-
- stw %r16,64(%r1)
- stw %r17,68(%r1)
- stw %r18,72(%r1)
- stw %r19,76(%r1)
-
- stw %r20,80(%r1)
- stw %r21,84(%r1)
- stw %r22,88(%r1)
- stw %r23,92(%r1)
-
- stw %r24,96(%r1)
- stw %r25,100(%r1)
- stw %r26,104(%r1)
- stw %r27,108(%r1)
-
- stw %r28,112(%r1)
- stw %r29,116(%r1)
- stw %r30,120(%r1)
- stw %r31,124(%r1)
-
- mflr %r0
- stw %r0,128(%r1)
- mfcr %r0
- stw %r0,132(%r1)
- mfctr %r0
- stw %r0,136(%r1)
- mfmsr %r0
- stw %r0,140(%r1)
-
- /* Count at zero */
- xor %r0,%r0,%r0
- stw %r0,144(%r1)
- mr %r3,%r1
- stw %r3,148(%r1)
-
- /* Body, print the regname, then the register */
-ofw_register_loop:
- lwz %r3,144(%r1)
- cmpi 0,0,%r3,32
- beq ofw_register_special
- lis %r3,0xe00000@ha
- addi %r3,%r3,freeldr_reg_init - _start
- bl ofw_print_string
- lwz %r3,144(%r1)
- bl ofw_print_number
- bl ofw_print_space
- lwz %r3,144(%r1)
- mulli %r3,%r3,4
- add %r3,%r1,%r3
- lwz %r3,0(%r3)
- stw %r3,152(%r1)
- bl ofw_print_number
- lwz %r3,144(%r1)
- addi %r3,%r3,1
- stw %r3,144(%r1)
-
- bl ofw_print_space
-
- lis %r3,0xe00000@ha
- addi %r3,%r3,freeldr_reg_init - _start
- bl ofw_print_string
- lwz %r3,144(%r1)
- bl ofw_print_number
- bl ofw_print_space
- lwz %r3,144(%r1)
- mulli %r3,%r3,4
- add %r3,%r1,%r3
- lwz %r3,0(%r3)
- stw %r3,152(%r1)
- bl ofw_print_number
- lwz %r3,144(%r1)
- addi %r3,%r3,1
- stw %r3,144(%r1)
-
- b done_dump
-
-dump_optional:
- bl ofw_print_space
- bl ofw_print_space
- lwz %r3,152(%r1)
- lwz %r3,0(%r3)
- bl ofw_print_number
- bl ofw_print_space
- lwz %r3,152(%r1)
- lwz %r3,4(%r3)
- bl ofw_print_number
- bl ofw_print_space
- lwz %r3,152(%r1)
- lwz %r3,8(%r3)
- bl ofw_print_number
- bl ofw_print_space
- lwz %r3,152(%r1)
- lwz %r3,12(%r3)
- bl ofw_print_number
- bl ofw_print_space
-done_dump:
- bl ofw_print_eol
- b ofw_register_loop
-
-ofw_register_special:
- /* LR */
- lis %r3,0xe00000@ha
- addi %r3,%r3,freeldr_reg_lr - _start
- bl ofw_print_string
- bl ofw_print_space
- lwz %r3,128(%r1)
- bl ofw_print_number
- bl ofw_print_eol
-
- /* CR */
- lis %r3,0xe00000@ha
- addi %r3,%r3,freeldr_reg_cr - _start
- bl ofw_print_string
- bl ofw_print_space
- lwz %r3,132(%r1)
- bl ofw_print_number
- bl ofw_print_eol
-
- /* CTR */
- lis %r3,0xe00000@ha
- addi %r3,%r3,freeldr_reg_ctr - _start
- bl ofw_print_string
- bl ofw_print_space
- lwz %r3,136(%r1)
- bl ofw_print_number
- bl ofw_print_eol
-
- /* MSR */
- lis %r3,0xe00000@ha
- addi %r3,%r3,freeldr_reg_msr - _start
- bl ofw_print_string
- bl ofw_print_space
- lwz %r3,140(%r1)
- bl ofw_print_number
- bl ofw_print_eol
-
- /* Return */
- lwz %r0,128(%r1)
- mtlr %r0
-
- lwz %r0,0(%r1)
- lwz %r2,8(%r1)
- lwz %r3,12(%r1)
-
- lwz %r4,16(%r1)
- lwz %r5,20(%r1)
- lwz %r6,24(%r1)
- lwz %r7,28(%r1)
-
- addi %r1,%r1,0xa0
-
- blr
-
-ofw_finddevice_hook:
- subi %r1,%r1,32
- stw %r3,0(%r1)
- mflr %r3
- stw %r3,4(%r1)
- lwz %r3,0(%r1)
- bl ofw_finddevice
- stw %r3,0(%r1)
- lwz %r3,4(%r1)
- mtlr %r3
- lwz %r3,0(%r1)
- addi %r1,%r1,32
- blr
-
-ofw_finddevice:
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,32
-
- /* Store r8, r9, lr */
- stw %r8,20(%r1)
- stw %r9,24(%r1)
- mflr %r8
- stw %r8,28(%r1)
-
- /* Get finddevice name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_finddevice_name - _start
- stw %r9,0(%r1)
-
- /* 1 Argument and 1 return */
- li %r9,1
- stw %r9,4(%r1)
- stw %r9,8(%r1)
-
- stw %r3,12(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- lwz %r3,16(%r1)
-
- /* Restore registers */
- lwz %r8,28(%r1)
- mtlr %r8
- lwz %r9,24(%r1)
- lwz %r8,20(%r1)
-
- addi %r1,%r1,32
-
- /* Return */
- blr
-
-ofw_open:
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,32
-
- /* Store r8, r9, lr */
- stw %r8,20(%r1)
- stw %r9,24(%r1)
- mflr %r8
- stw %r8,28(%r1)
-
- /* Get open name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_open_name - _start
- stw %r9,0(%r1)
-
- /* 1 Argument and 1 return */
- li %r9,1
- stw %r9,4(%r1)
- stw %r9,8(%r1)
-
- stw %r3,12(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- lwz %r3,16(%r1)
-
- /* Restore registers */
- lwz %r8,28(%r1)
- mtlr %r8
- lwz %r9,24(%r1)
- lwz %r8,20(%r1)
-
- addi %r1,%r1,32
-
- /* Return */
- blr
-
-ofw_getprop_hook:
- /* Reserve stack space:
- * 32 bytes for the ofw call
- * 12 bytes for r8, r9, lr
- */
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,48
-
- /* Store r8, r9, lr */
- stw %r8,32(%r1)
- stw %r9,36(%r1)
- mflr %r8
- stw %r8,40(%r1)
-
- /* Get getprop name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_getprop_name - _start
- stw %r9,0(%r1)
-
- /* 4 Argument and 1 return */
- li %r9,4
- stw %r9,4(%r1)
- li %r9,1
- stw %r9,8(%r1)
-
- stw %r3,12(%r1) /* Package */
- stw %r4,16(%r1) /* Property */
- stw %r5,20(%r1) /* Return buffer */
- stw %r6,24(%r1) /* Buffer size */
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- /* Workaround to a wierd crash ... not sure what causes it.
- * XXX investigate me */
- bl ofw_print_nothing
-
- /* Return */
- lwz %r3,28(%r1)
-
- /* Restore registers */
- lwz %r8,40(%r1)
- mtlr %r8
- lwz %r9,36(%r1)
- lwz %r8,32(%r1)
-
- addi %r1,%r1,48
-
- /* Return */
- blr
-
-ofw_getprop:
- /* Reserve stack space:
- * 32 bytes for the ofw call
- * 12 bytes for r8, r9, lr
- */
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,48
-
- /* Store r8, r9, lr */
- stw %r8,32(%r1)
- stw %r9,36(%r1)
- mflr %r8
- stw %r8,40(%r1)
-
- /* Get getprop name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_getprop_name - _start
- stw %r9,0(%r1)
-
- /* 4 Argument and 1 return */
- li %r9,4
- stw %r9,4(%r1)
- li %r9,1
- stw %r9,8(%r1)
-
- stw %r3,12(%r1) /* Package */
- stw %r4,16(%r1) /* Property */
- stw %r5,20(%r1) /* Return buffer */
- stw %r6,24(%r1) /* Buffer size */
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- /* Return */
- lwz %r3,28(%r1)
-
- /* Restore registers */
- lwz %r8,40(%r1)
-
- mtlr %r8
- lwz %r9,36(%r1)
- lwz %r8,32(%r1)
-
- addi %r1,%r1,48
-
- /* Return */
- blr
-
-ofw_write:
- /* Reserve stack space:
- * 28 bytes for the ofw call
- * 12 bytes for r8, r9, lr
- */
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,48
-
- nop
-
- /* Store r8, r9, lr */
- stw %r8,28(%r1)
- stw %r9,32(%r1)
- mflr %r8
- stw %r8,36(%r1)
-
- /* Get write name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_write_name - _start
- stw %r9,0(%r1)
-
- /* 3 Arguments and 1 return */
- li %r9,3
- stw %r9,4(%r1)
- li %r9,1
- stw %r9,8(%r1)
-
- stw %r3,12(%r1)
- stw %r4,16(%r1)
- stw %r5,20(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- /* Return */
- lwz %r3,24(%r1)
-
- /* Restore registers */
- lwz %r8,36(%r1)
- mtlr %r8
- lwz %r9,32(%r1)
- lwz %r8,28(%r1)
-
- addi %r1,%r1,48
-
- /* Return */
- blr
-
-ofw_read:
- /* Reserve stack space:
- * 28 bytes for the ofw call
- * 12 bytes for r8, r9, lr
- */
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,48
-
- nop
-
- /* Store r8, r9, lr */
- stw %r8,28(%r1)
- stw %r9,32(%r1)
- mflr %r8
- stw %r8,36(%r1)
-
- /* Get read name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_read_name - _start
- stw %r9,0(%r1)
-
- /* 3 Arguments and 1 return */
- li %r9,3
- stw %r9,4(%r1)
- li %r9,1
- stw %r9,8(%r1)
-
- stw %r3,12(%r1)
- stw %r4,16(%r1)
- stw %r5,20(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- /* Return */
- lwz %r3,24(%r1)
-
- /* Restore registers */
- lwz %r8,36(%r1)
- mtlr %r8
- lwz %r9,32(%r1)
- lwz %r8,28(%r1)
-
- addi %r1,%r1,48
-
- /* Return */
- blr
-
-ofw_exit:
- lis %r3,0xe00000@ha
- addi %r3,%r3,freeldr_halt - _start
-
- bl ofw_print_string
-/*
-ofw_exit_loop:
- b ofw_exit_loop
-*/
- /* Load the exit name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_exit_name - _start
- stw %r9,0(%r1)
-
- /* Zero args, zero returns */
- xor %r9,%r9,%r9
- stw %r9,4(%r1)
- stw %r9,8(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- mr %r3,%r1
-
- /* Fire */
- blrl
- /* No return from exit */
-
-ofw_child:
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,32
-
- /* Store r8, r9, lr */
- stw %r8,20(%r1)
- stw %r9,24(%r1)
- mflr %r8
- stw %r8,28(%r1)
-
- /* Get child name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_child_name - _start
- stw %r9,0(%r1)
-
- /* 1 Argument and 1 return */
- li %r9,1
- stw %r9,4(%r1)
- stw %r9,8(%r1)
-
- stw %r3,12(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- lwz %r3,16(%r1)
-
- /* Restore registers */
- lwz %r8,28(%r1)
- mtlr %r8
- lwz %r9,24(%r1)
- lwz %r8,20(%r1)
-
- addi %r1,%r1,32
-
- /* Return */
- blr
-
-ofw_peer:
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,32
-
- /* Store r8, r9, lr */
- stw %r8,20(%r1)
- stw %r9,24(%r1)
- mflr %r8
- stw %r8,28(%r1)
-
- /* Get peer name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_peer_name - _start
- stw %r9,0(%r1)
-
- /* 1 Argument and 1 return */
- li %r9,1
- stw %r9,4(%r1)
- stw %r9,8(%r1)
-
- stw %r3,12(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- lwz %r3,16(%r1)
-
- /* Restore registers */
- lwz %r8,28(%r1)
- mtlr %r8
- lwz %r9,24(%r1)
- lwz %r8,20(%r1)
-
- addi %r1,%r1,32
-
- /* Return */
- blr
-
-ofw_seek:
- /* Reserve stack space ...
- * 20 bytes for the ofw call,
- * r8, r9, and lr */
- subi %r1,%r1,32
-
- /* Store r8, r9, lr */
- stw %r8,20(%r1)
- stw %r9,24(%r1)
- mflr %r8
- stw %r8,28(%r1)
-
- /* Get peer name */
- lis %r8,0xe00000@ha
- addi %r9,%r8,ofw_seek_name - _start
- stw %r9,0(%r1)
-
- /* 3 Arguments and 1 return */
- li %r9,3
- stw %r9,4(%r1)
- li %r9,1
- stw %r9,8(%r1)
-
- stw %r3,12(%r1)
- stw %r4,16(%r1)
- stw %r5,20(%r1)
-
- /* Load up the call address */
- lwz %r9,ofw_call_addr - _start(%r8)
- mtlr %r9
-
- /* Set argument */
- mr %r3,%r1
-
- /* Fire */
- blrl
-
- lwz %r3,16(%r1)
-
- /* Restore registers */
- lwz %r8,28(%r1)
- mtlr %r8
- lwz %r9,24(%r1)
- lwz %r8,20(%r1)
-
- addi %r1,%r1,32
-
- /* Return */
- blr
-
-
-setup_exc:
- subi %r1,%r1,32
-
- stw %r3,0(%r1)
- mflr %r3
- stw %r3,4(%r1)
- stw %r8,8(%r1)
- stw %r9,12(%r1)
- stw %r10,16(%r1)
- stw %r12,20(%r1)
-
- lis %r8,0xe00000@ha
- xor %r12,%r12,%r12
- addi %r12,%r12,0x300
- addi %r9,%r8,dsi_exc - _start
- addi %r10,%r8,dsi_end - _start
-
-copy_loop:
- cmp 0,0,%r9,%r10
- beq ret_setup_exc
-
- mr %r3,%r12
- bl ofw_print_number
- bl ofw_print_space
-
- lwz %r3,0(%r9)
- stw %r3,0(%r12)
-
- bl ofw_print_number
- bl ofw_print_eol
-
- addi %r12,%r12,4
- addi %r9,%r9,4
- b copy_loop
-
-ret_setup_exc:
- mfmsr %r12
- andi. %r12,%r12,0xffbf
- mtmsr %r12
-
- lwz %r12,20(%r1)
- lwz %r10,16(%r1)
- lwz %r9,12(%r1)
- lwz %r8,8(%r1)
-
- lwz %r3,4(%r1)
- mtlr %r3
- lwz %r3,0(%r1)
-
- blr
-
-dsi_exc:
- subi %r1,%r1,16
-
- stw %r0,0(%r1)
- stw %r3,4(%r1)
-
- mfsrr0 %r3
- addi %r3,%r3,4
- mtsrr0 %r3
-
- /* mfsrr1 %r3 */
- /* ori %r3,%r3,2 */
- /* mtsrr1 %r3 */
-
- lwz %r3,4(%r1)
- lwz %r0,0(%r1)
-
- addi %r1,%r1,16
- rfi
-dsi_end:
-
.org 0x1000
freeldr_banner:
.ascii "ReactOS OpenFirmware Boot Program\r\n\0"
freeldr_halt:
.ascii "ReactOS OpenFirmware Boot Program Halting\r\n\0"
-freeldr_reg_init:
- .ascii "r\0"
-freeldr_reg_lr:
- .ascii "lr \0"
-freeldr_reg_cr:
- .ascii "cr \0"
-freeldr_reg_ctr:
- .ascii "ctr\0"
-freeldr_reg_msr:
- .ascii "msr\0"
-
-ofw_call_addr:
- .long 0
-
ofw_memory_size:
.long 0
.long 0
.long 0
.long 0
-ofw_finddevice_name:
- .ascii "finddevice\0"
-
-ofw_getprop_name:
- .ascii "getprop\0"
-
-ofw_write_name:
- .ascii "write\0"
-
-ofw_read_name:
- .ascii "read\0"
-
-ofw_exit_name:
- .ascii "exit\0"
-
-ofw_open_name:
- .ascii "open\0"
-
-ofw_child_name:
- .ascii "child\0"
-
-ofw_peer_name:
- .ascii "peer\0"
-
-ofw_seek_name:
- .ascii "seek\0"
-
-ofw_chosen_name:
- .ascii "/chosen\0"
-
-ofw_stdout_name:
- .ascii "stdout\0"
-
-ofw_memory_name:
- .ascii "/memory@0\0"
-
-ofw_reg_name:
- .ascii "reg\0"
-
-ofw_functions:
- .long ofw_finddevice_hook
- .long ofw_getprop_hook
- .long ofw_write
- .long ofw_read
- .long ofw_exit
- .long ofw_print_regs
- .long ofw_print_string
- .long ofw_print_number
- .long ofw_open
- .long ofw_child
- .long ofw_peer
- .long ofw_seek
-
.org 0x2000
stack:
.space 0x4000
projects / reactos.git / commitdiff