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authorManuel Novoa III <mjn3@codepoet.org>2001-03-04 19:13:07 +0000
committerManuel Novoa III <mjn3@codepoet.org>2001-03-04 19:13:07 +0000
commit7be859a705aa7084b187e8007847aa4ddb049faf (patch)
tree75eb50096f9228e01cc5cc835f362480815a3161 /libc/sysdeps
parent3d15998e6539d9362a898f46005d0a2aea497c74 (diff)
Fixed vfork on i386. Reduced size of __uClibc_syscall.
Diffstat (limited to 'libc/sysdeps')
-rw-r--r--libc/sysdeps/linux/i386/Makefile4
-rw-r--r--libc/sysdeps/linux/i386/__uClibc_syscall.S35
-rw-r--r--libc/sysdeps/linux/i386/vfork.S22
3 files changed, 38 insertions, 23 deletions
diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile
index 8c5fb21af..47fea7402 100644
--- a/libc/sysdeps/linux/i386/Makefile
+++ b/libc/sysdeps/linux/i386/Makefile
@@ -28,13 +28,13 @@ ASFLAGS=$(CFLAGS)
CRT0=crt0.S
CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0))
-SSRC=longjmp.S setjmp.S #_start.S #clone.S
+SSRC=longjmp.S setjmp.S vfork.S #_start.S #clone.S
ifeq ($(UNIFIED_SYSCALL),true)
SSRC += __uClibc_syscall.S
endif
SOBJS=$(patsubst %.S,%.o, $(SSRC))
-CSRC=fork.c vfork.c __init_brk.c brk.c sbrk.c
+CSRC=fork.c __init_brk.c brk.c sbrk.c
COBJS=$(patsubst %.c,%.o, $(CSRC))
OBJS=$(SOBJS) $(COBJS)
diff --git a/libc/sysdeps/linux/i386/__uClibc_syscall.S b/libc/sysdeps/linux/i386/__uClibc_syscall.S
index ecf2d6350..9e82d7acb 100644
--- a/libc/sysdeps/linux/i386/__uClibc_syscall.S
+++ b/libc/sysdeps/linux/i386/__uClibc_syscall.S
@@ -1,39 +1,32 @@
-.globl __uClibc_syscall
-
.text
.align 4
+.globl __uClibc_syscall
+ .type __uClibc_syscall,@function
__uClibc_syscall:
- pushl %ebp
- movl %esp,%ebp
- subl $8,%esp
pushl %edi
pushl %esi
pushl %ebx
- /* movl $21,%eax */
and $0xff,%eax
- movl 8(%ebp),%ebx
- movl 12(%ebp),%ecx
- movl 16(%ebp),%edx
- movl 20(%ebp),%esi
- movl 24(%ebp),%edi
+ movl 16(%esp),%ebx
+ movl 20(%esp),%ecx
+ movl 24(%esp),%edx
+ movl 28(%esp),%esi
+ movl 32(%esp),%edi
#APP
int $0x80
#NO_APP
- movl %eax,-4(%ebp)
- .p2align 4,,7
- cmpl $-126,-4(%ebp)
+ cmpl $-4095,%eax
+ /* jae .L5 */
+ /* cmpl $-126,%eax */
jbe .L5
- movl -4(%ebp),%eax
negl %eax
movl %eax,errno
- movl $-1,-4(%ebp)
+ movl $-1,%eax
+ .p2align 4,,7
.L5:
- movl -4(%ebp),%edx
- movl %edx,-8(%ebp)
- movl -8(%ebp),%eax
- leal -20(%ebp),%esp
popl %ebx
popl %esi
popl %edi
- leave
ret
+.Lfe1:
+ .size __uClibc_syscall,.Lfe1-__uClibc_syscall
diff --git a/libc/sysdeps/linux/i386/vfork.S b/libc/sysdeps/linux/i386/vfork.S
new file mode 100644
index 000000000..5775daee3
--- /dev/null
+++ b/libc/sysdeps/linux/i386/vfork.S
@@ -0,0 +1,22 @@
+.text
+ .align 4
+.globl vfork
+ .type vfork,@function
+vfork:
+ popl %ecx
+ movl $190,%eax
+#APP
+ int $0x80
+#NO_APP
+ cmpl $-4095,%eax
+ jae .L5
+ jmp *%ecx
+ .p2align 4,,7
+.L5:
+ pushl %ecx
+ negl %eax
+ movl %eax,errno
+ movl $-1,%eax
+ ret
+.Lfe1:
+ .size vfork,.Lfe1-vfork