Update.

1998-08-14 10:08  Ulrich Drepper  <drepper@cygnus.com>

	* manual/texinfo.tex: Update.

1998-08-07  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/powerpc/backtrace.c: New file.

1998-08-14  Philip Blundell  <pb@nexus.co.uk>

	* sysdeps/arm/fpu/setjmp.S: Correct value of R0 before calling
	sigjmp_save.
	* sysdeps/arm/elf/setjmp.S: Obsolete, deleted.

1998-08-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Makefile (install-symbolic-link): Fix spelling.

1998-08-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/elf.h (SHT_HIOS): Fix value.

1998-08-10  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* posix/regex.c (WIDE_CHAR_SUPPORT): Don't generate defined as
	part of the expansion, this is undefined by the standard.

3 files changed, 66 insertions, 76 deletions

diff --git a/sysdeps/arm/elf/setjmp.S b/sysdeps/arm/elf/setjmp.S
deleted file mode 100644
index 51572ca515..0000000000
--- a/sysdeps/arm/elf/setjmp.S
+++ /dev/null
@@ -1,76 +0,0 @@
-/* setjmp for arm, ELF version.
-   Copyright (C) 1995, 1996, 1997, 1998 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 Library General Public License as
-   published by the Free Software Foundation; either version 2 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#include <sysdep.h>
-#define _ASM
-#define _SETJMP_H
-#include <bits/setjmp.h>
-
-	/* We include the BSD entry points here as well but we make
-	   them weak.  */
-ENTRY (setjmp)
-	.weak C_SYMBOL_NAME (setjmp)
-	@ call comes here with
-	@ lr = return pc
-	@ r0 = &jump_buf
-
-	@ add a second argument into the fray
-	mov r1, #1
-	@ call the common code
-	b __sigsetjmp(PLT)
-END (setjmp)
-
-	/* Binary compatibility entry point.  */
-ENTRY (_setjmp)
-	.weak C_SYMBOL_NAME (_setjmp)
-ENTRY (__setjmp)
-	@ call comes here with
-	@ lr = return pc
-	@ r0 = &jump_buf
-
-	@ add a second argument into the fray
-	mov r1, #1
-	@ fall through to the common code....
-
-ENTRY (__sigsetjmp)
-	@ save the registers into the jmp_buf....
-	stmia r0, {r1-r6, sl, fp, sp, lr}
-
-	/* Make a tail call to __sigjmp_save; it takes the same args.  */
-#ifdef	PIC
-	/* We cannot use the PLT, because it requires that sl==r10 be set, but
-           we can't save and restore our caller's value.  Instead, we do an
-           indirect jump through the GOT, using for the temporary register
-           ip, which is call-clobbered.  */
-	ldr ip, 1f
-	add ip, ip, pc
-2:	@ get the address of __sigjmp_save
-	ldr r1, 3f
-	ldr ip, [ip, r1]
-	@ restore r1
-	ldr r1, [r0]
-	@ jump to *__sigjmp_save
-	mov pc, ip
-1:	.word _GLOBAL_OFFSET_TABLE_ - 2b - 4
-3:	.word __sigjmp_save(GOT)
-
-#else
-	b __sigjmp_save
-#endif
-END (__sigsetjmp)
diff --git a/sysdeps/arm/fpu/setjmp.S b/sysdeps/arm/fpu/setjmp.S
index 790e7566d4..6ee53c57b0 100644
--- a/sysdeps/arm/fpu/setjmp.S
+++ b/sysdeps/arm/fpu/setjmp.S
@@ -30,6 +30,9 @@ ENTRY (__sigsetjmp)
 	sfmea	f4, 4, [r0]!
 	stmia	r0, {v1-v6, sl, fp, sp, lr}
 
+	/* Restore pointer to jmp_buf */
+	sub	r0, r0, #48
+
 	/* Make a tail call to __sigjmp_save; it takes the same args.  */
 	B	PLTJMP(C_SYMBOL_NAME(__sigjmp_save))
 END (__setjmp)
diff --git a/sysdeps/powerpc/backtrace.c b/sysdeps/powerpc/backtrace.c
new file mode 100644
index 0000000000..7d71fbd9a8
--- /dev/null
+++ b/sysdeps/powerpc/backtrace.c
@@ -0,0 +1,63 @@
+/* Return backtrace of current program state.
+   Copyright (C) 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <execinfo.h>
+
+/* This is the stack layout we see with every stack frame.
+   Note that every routine is required by the ABI to lay out the stack
+   like this.
+
+            +----------------+        +-----------------+
+    %r1  -> | %r1 last frame--------> | %r1 last frame--->...  --> NULL
+            |                |        |                 |
+            | (unused)       |        | return address  |
+            +----------------+        +-----------------+
+*/
+struct layout
+{
+  struct layout *next;
+  void *return_address;
+};
+
+int
+__backtrace (void **array, int size)
+{
+  struct layout *current;
+  int count;
+  
+  /* Force gcc to spill LR.  */
+  asm volatile ("" : "=l"(current));
+
+  /* Get the address on top-of-stack.  */
+  asm volatile ("lwz %0,0(1)" : "=r"(current));
+
+  for (				count = 0;
+       current != NULL && 	count < size;
+       current = current->next, count++)
+    array[count] = current->return_address;
+
+  /* It's possible the second-last stack frame can't return
+     (that is, it's __libc_start_main), in which case
+     the CRT startup code will have set its LR to 'NULL'.  */
+  if (count > 0 && array[count-1] == NULL)
+    count--;
+
+  return count;
+}
+weak_alias (__backtrace, backtrace)