mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
synced 2026-02-06 03:23:58 +00:00
9d1b64dd4d
Only arg1 to arg6 have been passed down to kernel for syscalls. This patch ensures that arg7 is also passed down for syscalls. In addition to this, ensure that we have 16-byte aligned stack during mips64 syscall. Along with the change for sync_file_range, this will fix sync_file_range01 failure within LTP test suite. Patch by Nikola Milutinovic.
215 lines
5.9 KiB
ArmAsm
215 lines
5.9 KiB
ArmAsm
|
|
/*--------------------------------------------------------------------*/
|
|
/*--- Support for doing system calls. syscall-mips32-linux.S ---*/
|
|
/*--------------------------------------------------------------------*/
|
|
|
|
/*
|
|
This file is part of Valgrind, a dynamic binary instrumentation
|
|
framework.
|
|
|
|
Copyright (C) 2010-2017 RT-RK
|
|
mips-valgrind@rt-rk.com
|
|
|
|
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, see <http://www.gnu.org/licenses/>.
|
|
|
|
The GNU General Public License is contained in the file COPYING.
|
|
*/
|
|
|
|
#include "pub_core_basics_asm.h"
|
|
|
|
#if defined(VGP_mips32_linux)
|
|
|
|
#include "pub_core_vkiscnums_asm.h"
|
|
#include "libvex_guest_offsets.h"
|
|
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/*
|
|
Perform a syscall for the client. This will run a syscall
|
|
with the client's specific per-thread signal mask.
|
|
|
|
The structure of this function is such that, if the syscall is
|
|
interrupted by a signal, we can determine exactly what
|
|
execution state we were in with respect to the execution of
|
|
the syscall by examining the value of IP in the signal
|
|
handler. This means that we can always do the appropriate
|
|
thing to precisely emulate the kernel's signal/syscall
|
|
interactions.
|
|
|
|
The syscall number is taken from the argument, even though it
|
|
should also be in regs->v0. The syscall result is written
|
|
back to regs->v0 on completion.
|
|
|
|
Returns 0 if the syscall was successfully called (even if the
|
|
syscall itself failed), or a nonzero error code in the lowest
|
|
8 bits if one of the sigprocmasks failed (there's no way to
|
|
determine which one failed). And there's no obvious way to
|
|
recover from that either, but nevertheless we want to know.
|
|
|
|
VG_(fixup_guest_state_after_syscall_interrupted) does the
|
|
thread state fixup in the case where we were interrupted by a
|
|
signal.
|
|
|
|
Prototype:
|
|
|
|
UWord ML_(do_syscall_for_client_WRK)(
|
|
Int syscallno, // $4 - a0
|
|
void* guest_state, // $5 - a1
|
|
const vki_sigset_t *sysmask, // $6 - a2
|
|
const vki_sigset_t *postmask, // $7 - a3
|
|
Int nsigwords) // stack
|
|
*/
|
|
/* from vki_arch.h */
|
|
#define VKI_SIG_SETMASK 3
|
|
|
|
.globl ML_(do_syscall_for_client_WRK)
|
|
ML_(do_syscall_for_client_WRK):
|
|
|
|
subu $29, $29, 56 #set up the steck frame,
|
|
sw $4, 52($29)
|
|
sw $5, 48($29)
|
|
sw $6, 44($29)
|
|
sw $7, 40($29)
|
|
sw $31, 36($29)
|
|
sw $30, 32($29)
|
|
sw $16, 28($29)
|
|
sw $17, 24($29)
|
|
sw $18, 20($29)
|
|
sw $19, 16($29)
|
|
sw $20, 12($29)
|
|
sw $21, 8($29)
|
|
sw $22, 4($29)
|
|
sw $23, 0($29)
|
|
addu $30, $29, 56
|
|
|
|
|
|
/* Set the signal mask which should be current during the syscall. */
|
|
|
|
1: li $2, __NR_rt_sigprocmask
|
|
li $4, VKI_SIG_SETMASK
|
|
move $5, $6 /* sysmask */
|
|
move $6, $7 /* postmask */
|
|
lw $7, 72($29) /* nsigwords */
|
|
syscall
|
|
nop
|
|
|
|
# TODO: this should remain, keep it just for now
|
|
bnez $7, 7f
|
|
nop
|
|
|
|
lw $8, 48($29) /* t0 == ThreadState */
|
|
|
|
lw $2, OFFSET_mips32_r2($8) /* v0 == guest_v0 */
|
|
lw $4, OFFSET_mips32_r4($8)
|
|
lw $5, OFFSET_mips32_r5($8)
|
|
lw $6, OFFSET_mips32_r6($8)
|
|
lw $7, OFFSET_mips32_r7($8)
|
|
subu $29, $29, 32 #set up the steck frame,
|
|
lw $9, OFFSET_mips32_r29($8)
|
|
lw $10, 16($9)
|
|
sw $10, 16($29)
|
|
lw $10, 20($9)
|
|
sw $10, 20($29)
|
|
lw $10, 24($9)
|
|
sw $10, 24($29)
|
|
|
|
2: syscall
|
|
|
|
3: addu $29, $29, 32 #set up the steck frame,
|
|
|
|
lw $8, 48($29) /* t0 == ThreadState */
|
|
sw $2, OFFSET_mips32_r2($8)
|
|
sw $3, OFFSET_mips32_r3($8)
|
|
sw $7, OFFSET_mips32_r7($8)
|
|
|
|
4: li $2, __NR_rt_sigprocmask
|
|
li $4, VKI_SIG_SETMASK
|
|
lw $5, 40($29)
|
|
li $6, 0
|
|
lw $7, 72($29) /* nsigwords */
|
|
syscall
|
|
nop
|
|
|
|
bnez $7, 7f
|
|
nop
|
|
|
|
/* Success */
|
|
li $2, 0
|
|
|
|
5: lw $4, 52($29)
|
|
lw $5, 48($29)
|
|
lw $6, 44($29)
|
|
lw $7, 40($29)
|
|
lw $31, 36($29)
|
|
lw $30, 32($29)
|
|
lw $16, 28($29)
|
|
lw $17, 24($29)
|
|
lw $18, 20($29)
|
|
lw $19, 16($29)
|
|
lw $20, 12($29)
|
|
lw $21, 8($29)
|
|
lw $22, 4($29)
|
|
lw $23, 0($29)
|
|
addu $29, $29, 56 #release the stack frame.
|
|
|
|
jr $31
|
|
nop
|
|
|
|
7: /* Failure: return 0x8000 | error code */
|
|
li $2, 0x8000
|
|
|
|
lw $4, 52($29)
|
|
lw $5, 48($29)
|
|
lw $6, 44($29)
|
|
lw $7, 40($29)
|
|
lw $31, 36($29)
|
|
lw $30, 32($29)
|
|
lw $16, 28($29)
|
|
lw $17, 24($29)
|
|
lw $18, 20($29)
|
|
lw $19, 16($29)
|
|
lw $20, 12($29)
|
|
lw $21, 8($29)
|
|
lw $22, 4($29)
|
|
lw $23, 0($29)
|
|
addu $29, $29, 56 #release the stack frame.
|
|
|
|
jr $31
|
|
nop
|
|
|
|
.section .rodata
|
|
/* export the ranges so that
|
|
VG_(fixup_guest_state_after_syscall_interrupted) can do the
|
|
right thing */
|
|
|
|
.globl ML_(blksys_setup)
|
|
.globl ML_(blksys_restart)
|
|
.globl ML_(blksys_complete)
|
|
.globl ML_(blksys_committed)
|
|
.globl ML_(blksys_finished)
|
|
ML_(blksys_setup): .long 1b
|
|
ML_(blksys_restart): .long 2b
|
|
ML_(blksys_complete): .long 3b
|
|
ML_(blksys_committed): .long 4b
|
|
ML_(blksys_finished): .long 5b
|
|
|
|
#endif // defined(VGP_mips32_linux)
|
|
|
|
/* Let the linker know we don't need an executable stack */
|
|
MARK_STACK_NO_EXEC
|
|
|
|
/*--------------------------------------------------------------------*/
|
|
/*--- end ---*/
|
|
/*--------------------------------------------------------------------*/
|