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Elide compatibility cruft when new enough kernel is assumed.

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This commit is contained in:
Ulrich Drepper 2002-12-21 18:37:16 +00:00
parent 5b52ee1753
commit c025bbf609
1 changed files with 17 additions and 1 deletions
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18
sysdeps/unix/sysv/linux/arm/sigcontextinfo.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1999 Free Software Foundation, Inc.
/* Copyright (C) 1999, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Philip Blundell <philb@gnu.org>, 1999.
@ -18,10 +18,22 @@
02111-1307 USA. */
#include <bits/armsigctx.h>
#include "kernel-features.h"
#define SIGCONTEXT int _a2, int _a3, int _a4, union k_sigcontext
#define SIGCONTEXT_EXTRA_ARGS _a2, _a3, _a4,
/* The sigcontext structure changed between 2.0 and 2.1 kernels. On any
modern system we should be able to assume that the "new" format will be
in use. */
#if __LINUX_KERNEL_VERSION > 131328
#define GET_PC(ctx) ((void *) ctx.v21.arm_pc)
#define GET_FRAME(ctx) ADVANCE_STACK_FRAME ((void *) ctx.v21.arm_fp)
#define GET_STACK(ctx) ((void *) ctx.v21.arm_sp)
#else
#define GET_PC(ctx) ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
ctx.v20.reg.ARM_pc : ctx.v21.arm_pc))
#define GET_FRAME(ctx) \
@ -29,7 +41,11 @@
ctx.v20.reg.ARM_fp : ctx.v21.arm_fp))
#define GET_STACK(ctx) ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
ctx.v20.reg.ARM_sp : ctx.v21.arm_sp))
#endif
#define ADVANCE_STACK_FRAME(frm) \
((struct layout *)frm - 1)
#define CALL_SIGHANDLER(handler, signo, ctx) \
(handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))