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-rw-r--r--libc/sysdeps/linux/arm/bits/profil-counter.h7
-rw-r--r--libc/sysdeps/linux/arm/bits/sigcontextinfo.h18
2 files changed, 23 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/arm/bits/profil-counter.h b/libc/sysdeps/linux/arm/bits/profil-counter.h
index 5d8be9dba..7639883f1 100644
--- a/libc/sysdeps/linux/arm/bits/profil-counter.h
+++ b/libc/sysdeps/linux/arm/bits/profil-counter.h
@@ -1,5 +1,5 @@
/* Low-level statistical profiling support function. Linux/ARM version.
- Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 2002 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
@@ -29,4 +29,9 @@ profil_counter (int signo, int _a2, int _a3, int _a4, union k_sigcontext sc)
else
pc = (void *) sc.v21.arm_pc;
profil_count (pc);
+
+ /* This is a hack to prevent the compiler from implementing the
+ above function call as a sibcall. The sibcall would overwrite
+ the signal context. */
+ asm volatile ("");
}
diff --git a/libc/sysdeps/linux/arm/bits/sigcontextinfo.h b/libc/sysdeps/linux/arm/bits/sigcontextinfo.h
index aebc3cfd5..30c2e3a6c 100644
--- a/libc/sysdeps/linux/arm/bits/sigcontextinfo.h
+++ b/libc/sysdeps/linux/arm/bits/sigcontextinfo.h
@@ -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))