Mercurial > sdl-ios-xcode
annotate src/hermes/mmx_main.asm @ 1199:2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
To: sdl@libsdl.org
Date: Sun, 11 Dec 2005 22:57:37 -0500
Subject: [SDL] exec stack in libsdl update
i posted back in September a patch to remove executable stacks:
http://www.devolution.com/pipermail/sdl/2005-September/070626.html
later in November, a similar patch was merged it seems:
http://www.libsdl.org/cgi/cvsweb.cgi/SDL12/src/hermes/mmx_main.asm
however, this lacks the additional output format checks that i posted in my
patch ... this isnt a problem if the hermes asm code is only ever used to
produce ELF objects, but if this is not true, then the additional checks in
my original patch will need to be merged
-mike
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 12 Dec 2005 09:13:12 +0000 |
| parents | da33b7e6d181 |
| children | 393092a3ebf6 |
| rev | line source |
|---|---|
| 0 | 1 ; |
| 2 ; mmx format converter main loops for HERMES | |
| 3 ; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk) | |
| 4 ; This source code is licensed under the GNU LGPL | |
| 5 ; | |
| 6 ; Please refer to the file COPYING.LIB contained in the distribution for | |
| 7 ; licensing conditions | |
| 8 ; | |
| 9 | |
| 10 BITS 32 | |
| 11 | |
| 12 GLOBAL _ConvertMMX | |
| 13 GLOBAL _mmxreturn | |
| 14 | |
| 15 SECTION .text | |
| 16 | |
| 17 ;; _ConvertMMX: | |
| 18 ;; [ESP+8] ConverterInfo* | |
| 19 ;; -------------------------------------------------------------------------- | |
| 20 ;; ConverterInfo (ebp+..) | |
| 21 ;; 0: void *s_pixels | |
| 22 ;; 4: int s_width | |
| 23 ;; 8: int s_height | |
| 24 ;; 12: int s_add | |
| 25 ;; 16: void *d_pixels | |
| 26 ;; 20: int d_width | |
| 27 ;; 24: int d_height | |
| 28 ;; 28: int d_add | |
| 29 ;; 32: void (*converter_function)() | |
| 30 ;; 36: int32 *lookup | |
| 31 | |
| 32 _ConvertMMX: | |
| 33 push ebp | |
| 34 mov ebp,esp | |
| 35 | |
| 36 ; Save the registers used by the blitters, necessary for optimized code | |
| 37 pusha | |
| 38 | |
| 39 mov eax,[ebp+8] | |
| 40 | |
| 41 cmp dword [eax+4],BYTE 0 | |
| 42 je endconvert | |
| 43 | |
| 44 mov ebp,eax | |
| 45 | |
| 46 mov esi,[ebp+0] | |
| 47 mov edi,[ebp+16] | |
| 48 | |
| 49 y_loop: | |
| 50 mov ecx,[ebp+4] | |
| 51 | |
| 52 jmp [ebp+32] | |
| 53 | |
| 54 _mmxreturn: | |
| 55 add esi,[ebp+12] | |
| 56 add edi,[ebp+28] | |
| 57 | |
| 58 dec dword [ebp+8] | |
| 59 jnz y_loop | |
| 60 | |
| 61 | |
| 62 ; Restore the registers used by the blitters, necessary for optimized code | |
| 63 popa | |
| 64 | |
| 65 pop ebp | |
| 66 | |
| 67 endconvert: | |
| 68 emms | |
| 69 | |
| 70 ret | |
| 71 | |
|
1199
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
72 %ifidn __OUTPUT_FORMAT__,elf |
|
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
73 section .note.GNU-stack noalloc noexec nowrite progbits |
|
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
74 %endif |