OpenE2K
/
glibc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

mips: Fix store/load gp registers to/from ucontext_t 

General purpose registers in mcontext_t structure
are 8 bytes long for both MIPS32/MIPS64.

get/set/make/swap context implementations for MIPS O32
incorrectly assume that general purpose registers
in this structure are 4 bytes long.

This patch is fixing that.

Tested for MIPS O32 LE and BE.
Compared objdump of modified functions for mips n32 and mips n64.

	[BZ #21548]
	* sysdeps/unix/sysv/linux/mips/getcontext.S: Define MCONTEXT_SZGREG as
	8 and use it when copying general purpose registers.
	* sysdeps/unix/sysv/linux/mips/makecontext.S: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/Makefile: Include new test for
	mips o32.
	* sysdeps/unix/sysv/linux/mips/mips32/bug-getcontext-mips-gp.c: Added
	new test for mips o32.
	* sysdeps/unix/sysv/linux/mips/setcontext.S: Define MCONTEXT_SZGREG as
	8 and use it when copying general purpose registers.
	* sysdeps/unix/sysv/linux/mips/swapcontext.S: Likewise.
This commit is contained in:
Gordana Cmiljanovic 2017-06-13 21:34:45 +00:00 committed by Joseph Myers
parent c2528fef3b
commit b309f058cf
7 changed files with 192 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
ChangeLog
View File

@ -1,3 +1,17 @@
2017-06-13 Gordana Cmiljanovic <gordana.cmiljanovic@imgtec.com>
[BZ #21548]
* sysdeps/unix/sysv/linux/mips/getcontext.S: Define MCONTEXT_SZGREG as
8 and use it when copying general purpose registers.
* sysdeps/unix/sysv/linux/mips/makecontext.S: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/Makefile: Include new test for
mips o32.
* sysdeps/unix/sysv/linux/mips/mips32/bug-getcontext-mips-gp.c: Added
new test for mips o32.
* sysdeps/unix/sysv/linux/mips/setcontext.S: Define MCONTEXT_SZGREG as
8 and use it when copying general purpose registers.
* sysdeps/unix/sysv/linux/mips/swapcontext.S: Likewise.
2017-06-13 Florian Weimer <fweimer@redhat.com>
* configure.ac (find_cxx_header): Suppress compiler error message.

35
sysdeps/unix/sysv/linux/mips/getcontext.S
View File

@ -38,6 +38,12 @@ MASK = 0x10000000
#endif
FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK
GPOFF = FRAMESZ - (1 * SZREG)
MCONTEXT_GREGSZ = 8
#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
MCONTEXT_GREGOFF = 4
#else
MCONTEXT_GREGOFF = 0
#endif
NESTED (__getcontext, FRAMESZ, ra)
.mask MASK, 0
@ -74,23 +80,24 @@ NESTED (__getcontext, FRAMESZ, ra)
/* Store a magic flag. */
li v1, 1
REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
/* zero */
REG_S v1, (MCONTEXT_GREGOFF + 0 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s0, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s1, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s2, (MCONTEXT_GREGOFF + 18 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s3, (MCONTEXT_GREGOFF + 19 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s4, (MCONTEXT_GREGOFF + 20 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s5, (MCONTEXT_GREGOFF + 21 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s6, (MCONTEXT_GREGOFF + 22 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s7, (MCONTEXT_GREGOFF + 23 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
REG_S _GP, (MCONTEXT_GREGOFF + 28 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#endif
REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
REG_S ra, MCONTEXT_PC(a0)
REG_S _SP, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S fp, (MCONTEXT_GREGOFF + 30 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S ra, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S ra, (MCONTEXT_GREGOFF + MCONTEXT_PC)(a0)
#ifdef __mips_hard_float
# if _MIPS_SIM == _ABI64

27
sysdeps/unix/sysv/linux/mips/makecontext.S
View File

@ -53,6 +53,12 @@ NARGREGS = 8
A3OFF = FRAMESZ + (3 * SZREG) /* caller-allocated */
NARGREGS = 4
#endif
MCONTEXT_GREGSZ = 8
#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
MCONTEXT_GREGOFF = 4
#else
MCONTEXT_GREGOFF = 0
#endif
NESTED (__makecontext, FRAMESZ, ra)
.mask MASK, -(ARGSZ * SZREG)
@ -89,7 +95,8 @@ NESTED (__makecontext, FRAMESZ, ra)
/* Store a magic flag. */
li v1, 1
REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
/* zero */
REG_S v1, (MCONTEXT_GREGOFF + 0 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
/* Set up the stack. */
PTR_L t0, STACK_SP(a0)
@ -100,14 +107,14 @@ NESTED (__makecontext, FRAMESZ, ra)
blez a2, 2f /* no arguments */
/* Store register arguments. */
PTR_ADDIU t2, a0, MCONTEXT_GREGS + 4 * SZREG
PTR_ADDIU t2, a0, MCONTEXT_GREGS + 4 * MCONTEXT_GREGSZ + MCONTEXT_GREGOFF
move t3, zero
0:
addiu t3, 1
REG_L v1, (t1)
PTR_ADDIU t1, SZREG
REG_S v1, (t2)
PTR_ADDIU t2, SZREG
PTR_ADDIU t2, MCONTEXT_GREGSZ
bgeu t3, a2, 2f /* all done */
bltu t3, NARGREGS, 0b /* next */
@ -138,13 +145,17 @@ NESTED (__makecontext, FRAMESZ, ra)
#else
PTR_LA t9, 99f
#endif
REG_S t0, (29 * SZREG + MCONTEXT_GREGS)(a0) /* sp */
REG_S v1, (16 * SZREG + MCONTEXT_GREGS)(a0) /* s0 */
/* sp */
REG_S t0, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
/* s0 */
REG_S v1, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#ifdef __PIC__
REG_S gp, (17 * SZREG + MCONTEXT_GREGS)(a0) /* s1 */
/* s1 */
REG_S gp, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#endif
REG_S t9, (31 * SZREG + MCONTEXT_GREGS)(a0) /* ra */
REG_S a1, MCONTEXT_PC(a0)
/* ra */
REG_S t9, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S a1, (MCONTEXT_GREGOFF + MCONTEXT_PC)(a0)
#ifdef __PIC__
RESTORE_GP64_STACK

4
sysdeps/unix/sysv/linux/mips/mips32/Makefile
View File

@ -2,3 +2,7 @@ ifeq ($(subdir),conform)
# For bugs 17786 and 21278.
conformtest-xfail-conds += mips-o32-linux
endif
ifeq ($(subdir),stdlib)
tests += bug-getcontext-mips-gp
endif

63
sysdeps/unix/sysv/linux/mips/mips32/bug-getcontext-mips-gp.c Normal file
View File

@ -0,0 +1,63 @@
/* Tests register values retreived by getcontext() for mips o32.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ucontext.h>
#if !defined __mips__ || _MIPS_SIM != _ABIO32
# error "MIPS O32 specific test."
#endif
#define SP_REG 29
static int
do_test (void)
{
ucontext_t ctx;
memset (&ctx, 0, sizeof (ctx));
int status = getcontext (&ctx);
if (status)
{
printf ("\ngetcontext() failed, errno: %d.\n", errno);
return 1;
}
if (ctx.uc_mcontext.gregs[SP_REG] == 0
|| ctx.uc_mcontext.gregs[SP_REG] > 0xffffffff)
{
printf ("\nError getcontext(): invalid $sp = 0x%llx.\n",
ctx.uc_mcontext.gregs[SP_REG]);
return 1;
}
if (ctx.uc_mcontext.pc == 0
|| ctx.uc_mcontext.pc > 0xffffffff)
{
printf ("\nError getcontext(): invalid ctx.uc_mcontext.pc = 0x%llx.\n",
ctx.uc_mcontext.pc);
return 1;
}
return 0;
}
#include <support/test-driver.c>

51
sysdeps/unix/sysv/linux/mips/setcontext.S
View File

@ -47,6 +47,12 @@ A0OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
#else
A0OFF = FRAMESZ + (0 * SZREG) /* caller-allocated */
#endif
MCONTEXT_GREGSZ = 8
#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
MCONTEXT_GREGOFF = 4
#else
MCONTEXT_GREGOFF = 0
#endif
NESTED (__setcontext, FRAMESZ, ra)
.mask MASK, -(ARGSZ * SZREG)
@ -73,7 +79,8 @@ NESTED (__setcontext, FRAMESZ, ra)
/* Check for the magic flag. */
li v0, 1
REG_L v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
/* zero */
REG_L v1, (MCONTEXT_GREGOFF + 0 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
bne v0, v1, 98f
REG_S a0, A0OFF(sp)
@ -117,32 +124,32 @@ NESTED (__setcontext, FRAMESZ, ra)
/* Note the contents of argument registers will be random
unless makecontext() has been called. */
REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a0, (MCONTEXT_GREGOFF + 4 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a1, (MCONTEXT_GREGOFF + 5 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a2, (MCONTEXT_GREGOFF + 6 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a3, (MCONTEXT_GREGOFF + 7 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#if _MIPS_SIM != _ABIO32
REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a4, (MCONTEXT_GREGOFF + 8 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a5, (MCONTEXT_GREGOFF + 9 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a6, (MCONTEXT_GREGOFF + 10 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a7, (MCONTEXT_GREGOFF + 11 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#endif
REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s0, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s1, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s2, (MCONTEXT_GREGOFF + 18 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s3, (MCONTEXT_GREGOFF + 19 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s4, (MCONTEXT_GREGOFF + 20 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s5, (MCONTEXT_GREGOFF + 21 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s6, (MCONTEXT_GREGOFF + 22 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s7, (MCONTEXT_GREGOFF + 23 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
REG_L gp, (MCONTEXT_GREGOFF + 28 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#endif
REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
REG_L t9, MCONTEXT_PC(v0)
REG_L sp, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L fp, (MCONTEXT_GREGOFF + 30 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L ra, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L t9, (MCONTEXT_GREGOFF + MCONTEXT_PC)(v0)
move v0, zero
jr t9

77
sysdeps/unix/sysv/linux/mips/swapcontext.S
View File

@ -47,6 +47,12 @@ A1OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
#else
A1OFF = FRAMESZ + (1 * SZREG) /* caller-allocated */
#endif
MCONTEXT_GREGSZ = 8
#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
MCONTEXT_GREGOFF = 4
#else
MCONTEXT_GREGOFF = 0
#endif
NESTED (__swapcontext, FRAMESZ, ra)
.mask MASK, -(ARGSZ * SZREG)
@ -83,23 +89,24 @@ NESTED (__swapcontext, FRAMESZ, ra)
/* Store a magic flag. */
li v1, 1
REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
/* zero */
REG_S v1, (MCONTEXT_GREGOFF + 0 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
REG_S s0, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s1, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s2, (MCONTEXT_GREGOFF + 18 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s3, (MCONTEXT_GREGOFF + 19 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s4, (MCONTEXT_GREGOFF + 20 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s5, (MCONTEXT_GREGOFF + 21 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s6, (MCONTEXT_GREGOFF + 22 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S s7, (MCONTEXT_GREGOFF + 23 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
REG_S _GP, (MCONTEXT_GREGOFF + 28 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#endif
REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
REG_S ra, MCONTEXT_PC(a0)
REG_S _SP, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S fp, (MCONTEXT_GREGOFF + 30 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S ra, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
REG_S ra, (MCONTEXT_GREGOFF + MCONTEXT_PC)(a0)
#ifdef __mips_hard_float
# if _MIPS_SIM == _ABI64
@ -167,32 +174,32 @@ NESTED (__swapcontext, FRAMESZ, ra)
/* Note the contents of argument registers will be random
unless makecontext() has been called. */
REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a0, (MCONTEXT_GREGOFF + 4 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a1, (MCONTEXT_GREGOFF + 5 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a2, (MCONTEXT_GREGOFF + 6 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a3, (MCONTEXT_GREGOFF + 7 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#if _MIPS_SIM != _ABIO32
REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
REG_L a4, (MCONTEXT_GREGOFF + 8 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a5, (MCONTEXT_GREGOFF + 9 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a6, (MCONTEXT_GREGOFF + 10 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L a7, (MCONTEXT_GREGOFF + 11 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#endif
REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
REG_L s0, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s1, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s2, (MCONTEXT_GREGOFF + 18 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s3, (MCONTEXT_GREGOFF + 19 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s4, (MCONTEXT_GREGOFF + 20 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s5, (MCONTEXT_GREGOFF + 21 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s6, (MCONTEXT_GREGOFF + 22 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L s7, (MCONTEXT_GREGOFF + 23 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
REG_L gp, (MCONTEXT_GREGOFF + 28 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
#endif
REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
REG_L t9, MCONTEXT_PC(v0)
REG_L sp, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L fp, (MCONTEXT_GREGOFF + 30 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L ra, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(v0)
REG_L t9, (MCONTEXT_GREGOFF + MCONTEXT_PC)(v0)
move v0, zero
jr t9