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2002-12-20 Art Haas <ahaas@airmail.net> * sysdeps/gnu/siglist.c: Convert GCC extension initializer syntax to C99. 2002-12-21 Philip Blundell <philb@gnu.org> * sysdeps/arm/elf/start.S (_start): Optimise a little. Push stack top as seventh arg to __libc_start_main. Reported by paulnash@wildseed.com. * sysdeps/unix/sysv/linux/arm/clone.S: Small optimisation. * sysdeps/unix/sysv/linux/arm/sigcontextinfo.h: Elide compatibility cruft when new enough kernel is assumed.
52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/* Copyright (C) 1999, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Philip Blundell <philb@gnu.org>, 1999.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <bits/armsigctx.h>
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#include "kernel-features.h"
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#define SIGCONTEXT int _a2, int _a3, int _a4, union k_sigcontext
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#define SIGCONTEXT_EXTRA_ARGS _a2, _a3, _a4,
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/* The sigcontext structure changed between 2.0 and 2.1 kernels. On any
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modern system we should be able to assume that the "new" format will be
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in use. */
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#if __LINUX_KERNEL_VERSION > 131328
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#define GET_PC(ctx) ((void *) ctx.v21.arm_pc)
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#define GET_FRAME(ctx) ADVANCE_STACK_FRAME ((void *) ctx.v21.arm_fp)
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#define GET_STACK(ctx) ((void *) ctx.v21.arm_sp)
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#else
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#define GET_PC(ctx) ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
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ctx.v20.reg.ARM_pc : ctx.v21.arm_pc))
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#define GET_FRAME(ctx) \
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ADVANCE_STACK_FRAME((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
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ctx.v20.reg.ARM_fp : ctx.v21.arm_fp))
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#define GET_STACK(ctx) ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
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ctx.v20.reg.ARM_sp : ctx.v21.arm_sp))
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#endif
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#define ADVANCE_STACK_FRAME(frm) \
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((struct layout *)frm - 1)
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#define CALL_SIGHANDLER(handler, signo, ctx) \
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(handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))
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