2 Aug
2015
2 Aug
'15
8:44 a.m.
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- Log -----------------------------------------------------------------
commit c13f823941b103cf744929e5afcb3e2bc1342354
Author: Waldemar Brodkorb <wbx(a)openadk.org>
Date: Wed Jul 29 21:06:54 2015 +0200
sh: fix static linking issue
commit 7966d8aca0af0048b3d82bc9af210c293a4c9aac
Author: Waldemar Brodkorb <wbx(a)uclibc-ng.org>
Date: Sat Jul 25 19:42:41 2015 +0200
simplify, as the other does not work correctly, suggested by tg
commit f5fa14e19c3dcd5f9648a8caaba63bc430f536da
Author: mirabilos <tg(a)mirbsd.org>
Date: Sat Jul 25 18:51:26 2015 +0200
fix inline asm changing the stack pointer leading to segfaults problem
commit cdfebe7629971fc671a10c9b419f33f9ff928cbd
Author: mirabilos <tg(a)mirbsd.org>
Date: Sat Jul 25 00:37:44 2015 +0200
fix MIPS N32 ABI Big Endian setjmp/longjmp
access to the jmp_buf structure occasionally happens asymmetrically:
fields defined in pointer size width (64 on N32) can be accessed as
32-bit words, but in that case, a̲l̲l̲ involved code must agree on that…
commit fb1802d9b238ecb7066ab0867d8c4c3c3acefaea
Author: mirabilos <tg(a)mirbsd.org>
Date: Fri Jul 24 22:18:07 2015 +0200
integrate old m68k vfork bugfix of pre-µClibc-ng tree
-----------------------------------------------------------------------
Summary of changes:
ldso/include/dl-syscall.h | 2 +-
libc/sysdeps/linux/i386/brk.c | 20 ++++++++++++--------
libc/sysdeps/linux/m68k/vfork.S | 19 +++++++++++--------
libc/sysdeps/linux/mips/__longjmp.c | 6 +++---
libpthread/nptl/forward.c | 2 +-
.../nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S | 6 ++++++
6 files changed, 34 insertions(+), 21 deletions(-)
diff --git a/ldso/include/dl-syscall.h b/ldso/include/dl-syscall.h
index 46ba07e..5528ba6 100644
--- a/ldso/include/dl-syscall.h
+++ b/ldso/include/dl-syscall.h
@@ -51,7 +51,7 @@ extern int _dl_errno;
static __always_inline attribute_noreturn __cold void _dl_exit(int status)
{
INLINE_SYSCALL(_dl_exit, 1, status);
-#if defined __GNUC__ && (!__GNUC_PREREQ (4, 4) && !__GNUC_PREREQ (4, 2))
+#if __GNUC_PREREQ(4, 5)
__builtin_unreachable(); /* shut up warning: 'noreturn' function does return*/
#else
while (1);
diff --git a/libc/sysdeps/linux/i386/brk.c b/libc/sysdeps/linux/i386/brk.c
index c2c9327..a513886 100644
--- a/libc/sysdeps/linux/i386/brk.c
+++ b/libc/sysdeps/linux/i386/brk.c
@@ -1,6 +1,7 @@
/* brk system call for Linux/i386.
Copyright (C) 1995, 1996, 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
+ Copyright (c) 2015 mirabilos <tg(a)mirbsd.org>
+ This file is part of uclibc-ng, derived from 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 Lesser General Public
@@ -27,15 +28,18 @@ int brk(void *addr)
{
void *newbrk;
- /* %ebx is used in PIC code, need to save/restore it manually.
- * gcc won't do it for us if we will request it in constraints
+ /*
+ * EBC is used in PIC code, we need to save/restore it manually.
+ * Unfortunately, GCC won't do that for us even if we use con-
+ * straints, and we cannot push it either as ESP clobbers are
+ * silently ignored, but EDX is preserved, so it's scratch space.
*/
- __asm__("pushl %%ebx\n"
- "movl %2, %%ebx\n"
- "int $0x80\n"
- "popl %%ebx\n"
+ __asm__("xchgl %%edx,%%ebx"
+ "\n int $0x80"
+ "\n xchgl %%edx,%%ebx"
: "=a" (newbrk)
- : "0" (__NR_brk), "g" (addr)
+ : "0" (__NR_brk), "d" (addr)
+ : "cc"
);
__curbrk = newbrk;
diff --git a/libc/sysdeps/linux/m68k/vfork.S b/libc/sysdeps/linux/m68k/vfork.S
index b2fe033..bde9d5a 100644
--- a/libc/sysdeps/linux/m68k/vfork.S
+++ b/libc/sysdeps/linux/m68k/vfork.S
@@ -22,20 +22,23 @@ __vfork:
movl %sp@+, %a1 /* save the return address for later */
movl IMM __NR_vfork,%d0
trap #0
- movl IMM -4097, %d1
- cmpl %d0, %d1
- bcs fix_errno
- jmp %a1@ /* don't return, just jmp directly */
-fix_errno:
- negl %d0
+ movl %a1, -(%sp)
+
+ cmpil #-4096,%d0
+ blss 1f
+
+ neg.l %d0
#ifndef __PIC__ /* needs handling as the other archs */
movl errno, %a0
#else
movl errno@GOT(%a5), %a0
#endif
movl %d0, %a0@
- movl IMM -1, %d0
- jmp %a1@ /* don't return, just jmp directly */
+ move.l #-1, %d0
+
+1:
+ move.l %d0, %a0
+ rts
.size __vfork,.-__vfork
weak_alias(__vfork,vfork)
diff --git a/libc/sysdeps/linux/mips/__longjmp.c b/libc/sysdeps/linux/mips/__longjmp.c
index 5b59971..aa94f76 100644
--- a/libc/sysdeps/linux/mips/__longjmp.c
+++ b/libc/sysdeps/linux/mips/__longjmp.c
@@ -101,13 +101,13 @@ void __longjmp (__jmp_buf env, int val_arg)
/* Restore the stack pointer and the FP. They have to be restored
last and in a single asm as gcc, depending on options used, may
use either of them to access env. */
-#if _MIPS_SIM == _MIPS_SIM_ABI64
+#if _MIPS_SIM != _MIPS_SIM_ABI32
__asm__ __volatile__ ("ld $29, %0\n\t"
"ld $30, %1\n\t" : : "m" (env[0].__sp), "m"
(env[0].__fp));
-#else /* O32 || N32 */
+#else /* O32 */
__asm__ __volatile__ ("lw $29, %0\n\t"
"lw $30, %1\n\t" : : "m" (env[0].__sp), "m"
(env[0].__fp));
-#endif /* O32 || N32 */
+#endif /* O32 */
/* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
if (val == 0)
diff --git a/libpthread/nptl/forward.c b/libpthread/nptl/forward.c
index 48d38d9..076d437 100644
--- a/libpthread/nptl/forward.c
+++ b/libpthread/nptl/forward.c
@@ -160,7 +160,7 @@ FORWARD2(__pthread_unwind,
/* We cannot call abort() here. */
INTERNAL_SYSCALL_DECL (err);
INTERNAL_SYSCALL (kill, err, 1, SIGKILL);
-#if defined __GNUC__ && (!__GNUC_PREREQ (4, 4) && !__GNUC_PREREQ (4, 2))
+#if __GNUC_PREREQ(4, 5)
__builtin_unreachable();
#else
while(1);
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S
b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S
index bac9dd4..9af4ea4 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S
@@ -138,6 +138,9 @@
.globl __lll_lock_wait_private
.type __lll_lock_wait_private,@function
.hidden __lll_lock_wait_private
+#ifndef IS_IN_libpthread
+ .weak __lll_lock_wait_private
+#endif
.align 5
cfi_startproc
__lll_lock_wait_private:
@@ -409,6 +412,9 @@ __lll_timedlock_wait:
.globl __lll_unlock_wake_private
.type __lll_unlock_wake_private,@function
.hidden __lll_unlock_wake_private
+#ifndef IS_IN_libpthread
+ .weak __lll_unlock_wake_private
+#endif
.align 5
cfi_startproc
__lll_unlock_wake_private:
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