generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Copy PIC handling code from x86_abi_support

Browse Source 
Change-Id: Ia05fe78d2bd29b6aebaf6605719fe8a32528f25c
This commit is contained in:
Johann 2016-02-17 18:21:03 -08:00
parent 71ccd103bd
commit 7e065cd573
2 changed files with 84 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
third_party/x86inc/README.libvpx vendored
View File

@ -14,3 +14,4 @@ Manage name mangling (prefixing with '_') manually because 'PREFIX' does not
exist in libvpx.
Expand PIC default to macho64 and respect CONFIG_PIC from libvpx
Set 'private_extern' visibility for macho targets.
Copy PIC 'GLOBAL' macros from x86_abi_support.asm

94
third_party/x86inc/x86inc.asm vendored
View File

@ -101,21 +101,93 @@
SECTION .rodata align=%1
%endmacro
%if WIN64
%define PIC
%elifidn __OUTPUT_FORMAT__,macho64
%define PIC
%elif ARCH_X86_64 == 0
; x86_32 doesn't require PIC.
; Some distros prefer shared objects to be PIC, but nothing breaks if
; the code contains a few textrels, so we'll skip that complexity.
%undef PIC
%elif CONFIG_PIC
%define PIC
; PIC macros are copied from vpx_ports/x86_abi_support.asm. The "define PIC"
; from original code is added in for 64bit.
%ifidn __OUTPUT_FORMAT__,elf32
%define ABI_IS_32BIT 1
%elifidn __OUTPUT_FORMAT__,macho32
%define ABI_IS_32BIT 1
%elifidn __OUTPUT_FORMAT__,win32
%define ABI_IS_32BIT 1
%elifidn __OUTPUT_FORMAT__,aout
%define ABI_IS_32BIT 1
%else
%define ABI_IS_32BIT 0
%endif
%if ABI_IS_32BIT
%if CONFIG_PIC=1
%ifidn __OUTPUT_FORMAT__,elf32
%define GET_GOT_DEFINED 1
%define WRT_PLT wrt ..plt
%macro GET_GOT 1
extern _GLOBAL_OFFSET_TABLE_
push %1
call %%get_got
%%sub_offset:
jmp %%exitGG
%%get_got:
mov %1, [esp]
add %1, _GLOBAL_OFFSET_TABLE_ + $$ - %%sub_offset wrt ..gotpc
ret
%%exitGG:
%undef GLOBAL
%define GLOBAL(x) x + %1 wrt ..gotoff
%undef RESTORE_GOT
%define RESTORE_GOT pop %1
%endmacro
%elifidn __OUTPUT_FORMAT__,macho32
%define GET_GOT_DEFINED 1
%macro GET_GOT 1
push %1
call %%get_got
%%get_got:
pop %1
%undef GLOBAL
%define GLOBAL(x) x + %1 - %%get_got
%undef RESTORE_GOT
%define RESTORE_GOT pop %1
%endmacro
%else
%define GET_GOT_DEFINED 0
%endif
%endif
%if ARCH_X86_64 == 0
%undef PIC
%endif
%else
%macro GET_GOT 1
%endmacro
%define GLOBAL(x) rel x
%define WRT_PLT wrt ..plt
%if WIN64
%define PIC
%elifidn __OUTPUT_FORMAT__,macho64
%define PIC
%elif CONFIG_PIC
%define PIC
%endif
%endif
%ifnmacro GET_GOT
%macro GET_GOT 1
%endmacro
%define GLOBAL(x) x
%endif
%ifndef RESTORE_GOT
%define RESTORE_GOT
%endif
%ifndef WRT_PLT
%define WRT_PLT
%endif
%ifdef PIC
default rel
%endif
; Done with PIC macros
%ifdef __NASM_VER__
%use smartalign