| ##--------------------------------------------------------------------## |
| ##--- Support routines for the JITter output. amd64/helpers.S ---## |
| ##--------------------------------------------------------------------## |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2000-2005 Julian Seward |
| jseward@acm.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| #include "core_asm.h" |
| #include "vki_unistd.h" |
| |
| /* ------------------ SIMULATED CPU HELPERS ------------------ */ |
| /* A stubs for a return which we want to catch: a signal return. |
| returns and pthread returns. In the latter case, the thread's |
| return value is in %EAX, so we pass this as the first argument |
| to the request. In both cases we use the user request mechanism. |
| You need to to read the definition of VALGRIND_MAGIC_SEQUENCE |
| in valgrind.h to make sense of this. |
| |
| This isn't used in-place. It is copied into the client address space |
| at an arbitary address. Therefore, this code must be completely |
| position-independent. |
| */ |
| .global VG_(trampoline_code_start) |
| .global VG_(trampoline_code_length) |
| .global VG_(tramp_rt_sigreturn_offset) |
| .global VG_(tramp_syscall_offset) |
| .global VG_(tramp_gettimeofday_offset) |
| .global VG_(tramp_time_offset) |
| |
| VG_(trampoline_code_start): |
| rt_sigreturn_start: |
| /* Likewise for rt signal frames */ |
| movq $__NR_rt_sigreturn, %rax |
| syscall |
| ud2 |
| |
| # We can point our sysinfo stuff here |
| .align 16 |
| syscall_start: |
| /* unused on amd64 */ |
| |
| .align 16 |
| gettimeofday_start: |
| movq $__NR_gettimeofday, %rax |
| syscall |
| ret |
| |
| .align 16 |
| time_start: |
| movq $__NR_time, %rax |
| syscall |
| ret |
| tramp_code_end: |
| |
| .data |
| VG_(trampoline_code_length): |
| .long tramp_code_end - VG_(trampoline_code_start) |
| VG_(tramp_rt_sigreturn_offset): |
| .long rt_sigreturn_start - VG_(trampoline_code_start) |
| VG_(tramp_syscall_offset): |
| .long syscall_start - VG_(trampoline_code_start) |
| VG_(tramp_gettimeofday_offset): |
| .long gettimeofday_start - VG_(trampoline_code_start) |
| VG_(tramp_time_offset): |
| .long time_start - VG_(trampoline_code_start) |
| .text |
| |
| |
| /* Let the linker know we don't need an executable stack */ |
| .section .note.GNU-stack,"",@progbits |
| |
| ##--------------------------------------------------------------------## |
| ##--- end ---## |
| ##--------------------------------------------------------------------## |