summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAustin Foxley <austinf@cetoncorp.com>2009-10-17 20:19:56 (GMT)
committerAustin Foxley <austinf@cetoncorp.com>2009-10-17 20:19:56 (GMT)
commitb04c2ba52317dab5b2e4172d2f8678b1025780d8 (patch)
tree5fca41f076901fbe5f5b9c3f8cd6f433403f35c0
parent6abc8f6c7c847291a9b20cb5b84e9a2dfe3b578a (diff)
i386 specific bit for nptl
* RESET_PID support for clone.S * SAVE_PID, RESTORE_PID in vfork.S * fixup syscall assembly constraints to be a little less restrictive allows arbitrary variables to be used as the syscall nr Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
-rw-r--r--libc/sysdeps/linux/i386/Makefile.arch13
-rw-r--r--libc/sysdeps/linux/i386/bits/syscalls.h2
-rw-r--r--libc/sysdeps/linux/i386/bits/uClibc_arch_features.h2
-rw-r--r--libc/sysdeps/linux/i386/clone.S8
-rw-r--r--libc/sysdeps/linux/i386/vfork.S10
5 files changed, 31 insertions, 4 deletions
diff --git a/libc/sysdeps/linux/i386/Makefile.arch b/libc/sysdeps/linux/i386/Makefile.arch
index 2bf2b76..668cca7 100644
--- a/libc/sysdeps/linux/i386/Makefile.arch
+++ b/libc/sysdeps/linux/i386/Makefile.arch
@@ -5,8 +5,17 @@
# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
#
-CSRC := brk.c sigaction.c __syscall_error.c
+CSRC := brk.c __syscall_error.c
+
+ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y)
+CSRC += sigaction.c
+endif
SSRC := \
- __longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S bsd-_setjmp.S \
+ __longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S \
sync_file_range.S syscall.S mmap.S mmap64.S posix_fadvise64.S
+
+
+ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y)
+SSRC += vfork.S clone.S
+endif
diff --git a/libc/sysdeps/linux/i386/bits/syscalls.h b/libc/sysdeps/linux/i386/bits/syscalls.h
index 23d872a..f9ea54a 100644
--- a/libc/sysdeps/linux/i386/bits/syscalls.h
+++ b/libc/sysdeps/linux/i386/bits/syscalls.h
@@ -102,7 +102,7 @@ __asm__ (".L__X'%ebx = 1\n\t"
"int $0x80\n\t" \
RESTOREARGS_##nr \
: "=a" (resultvar) \
- : "i" (name) ASMFMT_##nr(args) : "memory", "cc"); \
+ : "g" (name) ASMFMT_##nr(args) : "memory", "cc"); \
(int) resultvar; })
#define LOADARGS_0
diff --git a/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h b/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h
index deeec03..536e9c1 100644
--- a/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h
@@ -37,7 +37,7 @@
#undef __UCLIBC_HAVE_ASM_GLOBAL_DOT_NAME__
/* define if target supports CFI pseudo ops */
-#undef __UCLIBC_HAVE_ASM_CFI_DIRECTIVES__
+#define __UCLIBC_HAVE_ASM_CFI_DIRECTIVES__
/* define if target supports IEEE signed zero floats */
#define __UCLIBC_HAVE_SIGNED_ZERO__
diff --git a/libc/sysdeps/linux/i386/clone.S b/libc/sysdeps/linux/i386/clone.S
index 14fc25c..a7de3fe 100644
--- a/libc/sysdeps/linux/i386/clone.S
+++ b/libc/sysdeps/linux/i386/clone.S
@@ -79,7 +79,10 @@ clone:
movl %eax,8(%ecx)
/* Don't leak any information. */
movl $0,4(%ecx)
+#ifndef RESET_PID
movl $0,(%ecx)
+#endif
+
/* Do the system call */
pushl %ebx
@@ -90,6 +93,10 @@ clone:
movl FLAGS+12(%esp),%ebx
movl CTID+12(%esp),%edi
movl $__NR_clone,%eax
+#ifdef RESET_PID
+ /* Remember the flag value. */
+ movl %ebx, (%ecx)
+#endif
int $0x80
popl %edi
popl %esi
@@ -121,3 +128,4 @@ __error:
jmp __syscall_error
.size clone,.-clone
+weak_alias(clone, __clone)
diff --git a/libc/sysdeps/linux/i386/vfork.S b/libc/sysdeps/linux/i386/vfork.S
index 8005ff1..c9db2f4 100644
--- a/libc/sysdeps/linux/i386/vfork.S
+++ b/libc/sysdeps/linux/i386/vfork.S
@@ -18,9 +18,19 @@
__vfork:
popl %ecx
+
+#ifdef SAVE_PID
+ SAVE_PID
+#endif
+
movl $__NR_vfork,%eax
int $0x80
pushl %ecx
+
+#ifdef RESTORE_PID
+ RESTORE_PID
+#endif
+
cmpl $-4095,%eax
jae __syscall_error
ret