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Fix amd64-darwin.dylib-entry.S so it compiles.

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This commit is contained in:
John Reiser 2010-03-11 14:37:17 -08:00
parent 910008e9e7
commit dba256d384
2 changed files with 616 additions and 611 deletions
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1210
src/stub/amd64-darwin.dylib-entry.h
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17
src/stub/src/amd64-darwin.dylib-entry.S
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@ -45,6 +45,7 @@
section MACHMAINX
_start: .globl _start
L100: pause; jmp L100 // FIXME
int3 // FIXME
push %rax // space for &user_init function
push %rbp // callee-save registers
@ -213,7 +214,7 @@ PROT_EXEC= 4
bad_mmap:
hlt
j bad_mmap
jmp bad_mmap
main:
pop %rbp # &decompress
lea -4+ _start - decompress(%rbp),%rbx # &total_length
@ -251,9 +252,9 @@ dy_reloc:
// Copy compressed __TEXT.
push %rdi # remember start of compressed __TEXT
mov %rbx,%rdx # &total_length
mov -3*4(%rbx),%eax # offset(user_init_function)
mov -4*4(%rbx),%eax # offset(user_init_function)
sub (%rbx),%edx # runtime base address
add %rdx,%rax; mov %rax,(1+2+8)*4(%rsp) # relocate &user_init_function
add %rdx,%rax; mov %rax,(1+2+2)*4(%rsp) # relocate &user_init_function
mov -2*4(%rbx),%esi; add %rdx,%rsi
mov -1*4(%rbx),%ecx
rep movsb
@ -265,7 +266,7 @@ dy_reloc:
// So, skip the first compressed block.
lodsl; add %rax,%rdi # sz_unc
lodsl; add %rax,%rsi # sz_cpr
lodsl # b_method
lodsl # junk {b_method}
dy_uncpr:
push %rsi; push %rdi # save in case unfilter
@ -296,10 +297,12 @@ dy_uncpr:
SYS_munmap= 0x02000000 + 73
dy_done:
pop %rax; pop %rcx # discard
mov $PAGE_SIZE,%arg2l // length for munmap
pop %arg1 // addr for munmap
pop %rbx; pop %rbp // saved registers
mov $SYS_munmap,%eax
lea -4(%rdi),%rdx # steal some space at high end of __TEXT
movl $0x90c35d5b,(%rdx) # pop %rbx; pop %rbp; ret; nop
# FIXME mov $SYS_munmap,%eax
# FIXME syscall
movl $0x90c3050f,(%rdx) # syscall; ret; nop
jmp *%rdx
#undef off