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b309f058cf
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.
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/* Tests register values retreived by getcontext() for mips o32.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ucontext.h>
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#if !defined __mips__ || _MIPS_SIM != _ABIO32
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# error "MIPS O32 specific test."
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#endif
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#define SP_REG 29
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static int
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do_test (void)
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{
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ucontext_t ctx;
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memset (&ctx, 0, sizeof (ctx));
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int status = getcontext (&ctx);
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if (status)
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{
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printf ("\ngetcontext() failed, errno: %d.\n", errno);
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return 1;
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}
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if (ctx.uc_mcontext.gregs[SP_REG] == 0
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|| ctx.uc_mcontext.gregs[SP_REG] > 0xffffffff)
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{
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printf ("\nError getcontext(): invalid $sp = 0x%llx.\n",
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ctx.uc_mcontext.gregs[SP_REG]);
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return 1;
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}
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if (ctx.uc_mcontext.pc == 0
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|| ctx.uc_mcontext.pc > 0xffffffff)
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{
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printf ("\nError getcontext(): invalid ctx.uc_mcontext.pc = 0x%llx.\n",
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ctx.uc_mcontext.pc);
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return 1;
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}
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return 0;
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}
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#include <support/test-driver.c>
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