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* file.
*/
#include "config.h"
#include "platform.h"
.intel_syntax noprefix
.macro generate_lookup name not_found
.macro GENERATE_LOOKUP name notFound
\name:
mov edx, [esp+4]
test edx, edx
jz short ret_nil
movl 4(%esp), %edx
testl %edx, %edx
jz returnNilMethod
bt edx, 0
jc short .Ltagged_pointer_\name
testb $1, %dl
jnz .LtaggedPointer_\name
mov edx, [edx]
mov edx, [edx+32]
movl (%edx), %edx
movl 32(%edx), %edx
.Lmain_\name:
mov eax, [esp+8]
movl 8(%esp), %eax
#ifdef OF_SELUID24
movzx ecx, byte ptr [eax+2]
mov edx, [edx+ecx*4]
movzbl 2(%eax), %ecx
movl (%edx,%ecx,4), %edx
#endif
movzx ecx, byte ptr [eax+1]
mov edx, [edx+ecx*4]
movzx ecx, byte ptr [eax]
mov eax, [edx+ecx*4]
movzbl 1(%eax), %ecx
movl (%edx,%ecx,4), %edx
movzbl (%eax), %ecx
movl (%edx,%ecx,4), %eax
test eax, eax
jz short 0f
testl %eax, %eax
jz 0f
ret
0:
call get_eip
add eax, offset _GLOBAL_OFFSET_TABLE_
lea eax, [eax+\not_found@GOTOFF]
jmp eax
call getEIP
addl $_GLOBAL_OFFSET_TABLE_, %eax
lea \notFound@GOTOFF(%eax), %eax
jmp *%eax
.Ltagged_pointer_\name:
call get_eip
add eax, offset _GLOBAL_OFFSET_TABLE_
.LtaggedPointer_\name:
call getEIP
addl $_GLOBAL_OFFSET_TABLE_, %eax
lea ecx, [eax+objc_tagged_pointer_secret@GOTOFF]
xor edx, [ecx]
and dl, 0xE
movzx edx, dl
leal objc_taggedPointerSecret@GOTOFF(%eax), %ecx
xorl (%ecx), %edx
andb $0xE, %dl
movzbl %dl, %edx
lea eax, [eax+objc_tagged_pointer_classes@GOTOFF]
mov edx, [eax+edx*2]
mov edx, [edx+32]
leal objc_taggedPointerClasses@GOTOFF(%eax), %eax
movl (%eax,%edx,2), %edx
movl 32(%edx), %edx
jmp short .Lmain_\name
jmp .Lmain_\name
.type \name, %function
.size \name, .-\name
.endm
.macro generate_lookup_super name lookup
.macro GENERATE_LOOKUP_SUPER name lookup
\name:
movl 4(%esp), %edx
mov edx, [esp+4]
mov eax, [edx]
movl (%edx), %eax
testl %eax, %eax
test eax, eax
jz short ret_nil
mov [esp+4], eax
mov edx, [edx+4]
mov edx, [edx+32]
jmp short .Lmain_\lookup
movl %eax, 4(%esp)
mov 4(%edx), %edx
mov 32(%edx), %edx
jmp .Lmain_\lookup
.type \name, %function
.size \name, .-\name
.endm
generate_lookup objc_msg_lookup objc_method_not_found
generate_lookup objc_msg_lookup_stret objc_method_not_found_stret
generate_lookup_super objc_msg_lookup_super objc_msg_lookup
generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret
ret_nil:
call get_eip
add eax, offset _GLOBAL_OFFSET_TABLE_
lea eax, [eax+nil_method@GOTOFF]
returnNilMethod:
call getEIP
addl $_GLOBAL_OFFSET_TABLE_, %eax
leal nilMethod@GOTOFF(%eax), %eax
ret
nil_method:
xor eax, eax
nilMethod:
xorl %eax, %eax
ret
get_eip:
mov eax, [esp]
getEIP:
movl (%esp), %eax
ret
#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif
|