diff options
| author | Grazvydas Ignotas <notasas@gmail.com> | 2017-01-08 19:38:09 +0200 |
|---|---|---|
| committer | Nicolai Hähnle <nicolai.haehnle@amd.com> | 2017-01-13 00:59:32 +0100 |
| commit | 89458366585c34879b70110758bb4fd3acb62ce0 (patch) | |
| tree | 281ee77e13d803173fed7bc22dbdeb9d7e817d67 /src/mapi | |
| parent | 1007047ca1086eef89f65c87e7ea2371c4f80513 (diff) | |
mapi: update the asm code to support x32
Fixes crashes when both glx-tls and asm are enabled on x32.
Cc: mesa-stable@lists.freedesktop.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94512
Bugzilla: https://bugs.gentoo.org/show_bug.cgi?id=575458
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Diffstat (limited to 'src/mapi')
| -rw-r--r-- | src/mapi/entry_x86-64_tls.h | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/src/mapi/entry_x86-64_tls.h b/src/mapi/entry_x86-64_tls.h index 8f3fa914a7..1e29bde516 100644 --- a/src/mapi/entry_x86-64_tls.h +++ b/src/mapi/entry_x86-64_tls.h @@ -41,11 +41,23 @@ __asm__(".text\n" ".balign 32\n" \ func ":" +#ifndef __ILP32__ + #define STUB_ASM_CODE(slot) \ "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" \ "movq %fs:(%rax), %r11\n\t" \ "jmp *(8 * " slot ")(%r11)" +#else + +#define STUB_ASM_CODE(slot) \ + "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" \ + "movl %fs:(%rax), %r11d\n\t" \ + "movl 4*" slot "(%r11d), %r11d\n\t" \ + "jmp *%r11" + +#endif + #define MAPI_TMP_STUB_ASM_GCC #include "mapi_tmp.h" @@ -72,19 +84,32 @@ void entry_patch(mapi_func entry, int slot) { char *code = (char *) entry; - *((unsigned int *) (code + 12)) = slot * sizeof(mapi_func); + int offset = 12; +#ifdef __ILP32__ + offset = 13; +#endif + *((unsigned int *) (code + offset)) = slot * sizeof(mapi_func); } mapi_func entry_generate(int slot) { - const char code_templ[16] = { + const char code_templ[] = { +#ifndef __ILP32__ /* movq %fs:0, %r11 */ 0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00, /* jmp *0x1234(%r11) */ 0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00, +#else + /* movl %fs:0, %r11d */ + 0x64, 0x44, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00, + /* movl 0x1234(%r11d), %r11d */ + 0x67, 0x45, 0x8b, 0x9b, 0x34, 0x12, 0x00, 0x00, + /* jmp *%r11 */ + 0x41, 0xff, 0xe3, +#endif }; - unsigned long addr; + unsigned long long addr; char *code; mapi_func entry; |