Update.

1998-08-24 16:34  Ulrich Drepper  <drepper@cygnus.com>

	* debug/catchsegv.sh: Handle text preceding backtrace better.
	* sysdeps/generic/segfault.c: Allow register dump.  Allow handler
	to be installed for other signals than SIGSEGV.
	* sysdeps/generic/register-dump.h: New file.
	* sysdeps/i386/register-dump.h: New file.
	* sysdeps/powerpc/register-dump.h: New file.

	* sysdeps/unix/sysv/linux/i386/profil-counter.h: Use macros from
	sigcontextinfo.h.
	* sysdeps/unix/sysv/linux/powerpc/profil-counter.h: Use i386 version.

1998-08-24  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/unix/sysv/linux/powerpc/sigcontextinfo.h: New file.

1998-08-09  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/unix/sysv/linux/powerpc/chown.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/lchown.S: New file.
	* sysdeps/unix/sysv/linux/powerpc/syscalls.list: Add chown, remove
	getresuid, getresgid.

1998-08-16  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/unix/sysv/linux/powerpc/clone.S: Fix bugs.  Set up stack
	pointer in userland.

1998-08-21  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/sys/mount.h (MNT_FORCE): Define as enum
	and fix value.

1998-08-22  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/ldd.bash.in: Add missing quotes around $file.  Make loop
	over arguments Bourne shell compatible.  Don't exit unsuccessfully
	if nonelf returns successfully.  Avoid duplicating most of the
	script.
	* sysdeps/unix/sysv/linux/ldd-rewrite.sed: Add missing quotes
	around $file.

1998-08-24 10:37  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* libio/Versions (_IO_do_write, _IO_file_attach,
	_IO_file_close_it, _IO_file_finish, _IO_file_fopen,
	_IO_file_init, _IO_file_overflow, _IO_file_seekoff,
	_IO_file_setbuf, _IO_file_sync, _IO_file_underflow,
	_IO_file_write, _IO_file_xsputn): Added to GLIBC_2.1.

	* libio/fileops.c (_IO_do_write, _IO_file_attach,
	_IO_file_close_it, _IO_file_finish, _IO_file_fopen,
	_IO_file_init, _IO_file_overflow, _IO_file_seekoff,
	_IO_file_setbuf, _IO_file_sync, _IO_file_underflow,
	_IO_file_write, _IO_file_xsputn): Change the prefix to
	"_IO_new_". Added to GLIBC_2.1.

	* libio/libioP.h (_IO_do_write, _IO_file_attach,
	_IO_file_close_it, _IO_file_finish, _IO_file_fopen,
	_IO_file_init, _IO_file_overflow, _IO_file_seekoff,
	_IO_file_setbuf, _IO_file_sync, _IO_file_underflow,
	_IO_file_write, _IO_file_xsputn): Add prototypes for the prefix
	"_IO_new_".

	* libio/oldfileops.c (_IO_do_write, _IO_file_attach,
	_IO_file_close_it, _IO_file_finish, _IO_file_fopen,
	_IO_file_init, _IO_file_overflow, _IO_file_seekoff,
	_IO_file_setbuf, _IO_file_sync, _IO_file_underflow,
	_IO_file_write, _IO_file_xsputn): Added to GLIBC_2.0.

	* csu/initfini.c: Return to .text before __gmon_start__.
	* elf/elf.h (EM_FAKE_ALPHA): Rename from EM_OLD_ALPHA.
	(STO_MIPS_*): Rename from STO_*.
	(STB_MIPS_SPLIT_COMMON): Rename from STB_SPLIT_COMMON.
	(STO_ALPHA_NOPV, STO_ALPHA_STD_GPLOAD): New.
	* math/atest-exp.c (mpn_bitsize): Fix bit location calculation.
	(main): e3s is negative on zero.
	* math/atest-exp2.c: Likewise.
1998-08-23  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* Makerules (install): Add comment about absolute paths.

1 files changed, 41 insertions, 37 deletions

diff --git a/sysdeps/unix/sysv/linux/powerpc/clone.S b/sysdeps/unix/sysv/linux/powerpc/clone.S
index 6209922b6b..69d2c5f586 100644
--- a/sysdeps/unix/sysv/linux/powerpc/clone.S
+++ b/sysdeps/unix/sysv/linux/powerpc/clone.S
@@ -1,5 +1,5 @@
 /* Wrapper around clone system call.
-   Copyright (C) 1997 Free Software Foundation, Inc.
+   Copyright (C) 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
@@ -28,56 +28,60 @@
 /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
 
 ENTRY(__clone)
-	/* Set up stack frame, save registers.  */
-	stwu  %r1,-32(%r1)
 	/* Check for child_stack == NULL || fn == NULL.  */
-	cmpwi %cr0,%r4,0
-	stw   %r31,16(%r1)
-	cmpwi %cr1,%r3,0
-	stw   %r30,20(%r1)
-	beq-  %cr0,badargs
-	beq-  %cr1,badargs
+	cmpwi	%cr0,%r4,0
+	cmpwi	%cr1,%r3,0
+	cror	cr0*4+eq,cr1*4+eq,cr0*4+eq
+	beq-	%cr0,L(badargs)
 
+	/* Set up stack frame for parent.  */
+	stwu	%r1,-32(%r1)
+	stmw	%r29,16(%r1)
+	
 	/* Set up stack frame for child.  */
-	addi  %r4,%r4,-16
-	clrrwi %r4,%r4,4
-	li    %r0,0
-	stw   %r0,0(%r4)
+	clrrwi	%r4,%r4,4
+	li	%r0,0
+	stwu	%r0,-16(%r4)
 
-	/* Save fn, args across syscall.  */
-	mr    %r30,%r3		/* Function in r30.  */
-	mr    %r31,%r6		/* Arguments in r31.  */
+	/* Save fn, args, stack across syscall.  */
+	mr	%r29,%r3		/* Function in r29.  */
+	mr	%r30,%r4		/* Stack pointer in r30.  */
+	mr	%r31,%r6		/* Argument in r31.  */
 
 	/* 'flags' argument is first parameter to clone syscall. (The other
 	   argument is the stack pointer, already in r4.)  */
-	mr    %r3,%r5
+	mr	%r3,%r5
 
 	/* Do the call.  */
 	DO_CALL(SYS_ify(clone))
-	bso-  error
-	beq   child
 
-	/* Parent.  Restore registers & return.  */
-	lwz   %r31,16(%r1)
-	lwz   %r30,20(%r1)
-	addi  %r1,%r1,32
-	blr
+	/* Check for child process.  */
+	cmpwi	%cr1,%r3,0
+	crandc	cr1*4+eq,cr1*4+eq,cr0*4+so
+	bne-	%cr1,L(parent)		/* The '-' is to minimise the race.  */
 
-child:
+	/* On at least mklinux DR3a5, clone() doesn't actually change
+	   the stack pointer.  I'm pretty sure this is a bug, because
+	   it adds a race condition if a signal is sent to a thread
+	   just after it is created (in the previous three instructions).  */
+	mr	%r1,%r30
 	/* Call procedure.  */
-	mtlr  %r30
-	mr    %r3,%r31
-	blrl
+	mtctr	%r29
+	mr	%r3,%r31
+	bctrl
 	/* Call _exit with result from procedure.  */
-	b JUMPTARGET(_exit)
-
-badargs:
-	li    %r3,EINVAL
-error:
-	lwz   %r31,16(%r1)
-	lwz   %r30,20(%r1)
-	addi  %r1,%r1,32
-	b JUMPTARGET(__syscall_error)
+	b	JUMPTARGET(_exit)
+
+L(parent):
+	/* Parent.  Restore registers & return.  */
+	lmw	%r29,16(%r1)
+	addi	%r1,%r1,32
+	bnslr+
+	b	JUMPTARGET(__syscall_error)
+
+L(badargs):
+	li	%r3,EINVAL
+	b	JUMPTARGET(__syscall_error)
 END (__clone)
 
 weak_alias (__clone, clone)