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-rw-r--r--libc/sysdeps/linux/i386/Makefile2
-rw-r--r--libc/sysdeps/linux/i386/bsd-_setjmp.S51
-rw-r--r--libc/sysdeps/linux/i386/bsd-setjmp.S61
-rw-r--r--libc/sysdeps/linux/i386/setjmp.S79
4 files changed, 146 insertions, 47 deletions
diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile
index a54685726..67dd89ebf 100644
--- a/libc/sysdeps/linux/i386/Makefile
+++ b/libc/sysdeps/linux/i386/Makefile
@@ -36,7 +36,7 @@ CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0))
endif
-SSRC=__longjmp.S setjmp.S vfork.S clone.S
+SSRC=__longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S bsd-_setjmp.S
ifeq ($(UNIFIED_SYSCALL),true)
SSRC += __uClibc_syscall.S
endif
diff --git a/libc/sysdeps/linux/i386/bsd-_setjmp.S b/libc/sysdeps/linux/i386/bsd-_setjmp.S
new file mode 100644
index 000000000..73d90eb4e
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bsd-_setjmp.S
@@ -0,0 +1,51 @@
+/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version.
+ Copyright (C) 1994,1995,1996,1997,2000,2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
+ We cannot do it in C because it must be a tail-call, so frame-unwinding
+ in setjmp doesn't clobber the state restored by longjmp. */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+
+.globl _setjmp;
+.type _setjmp,@function
+.align 4;
+
+_setjmp:
+ xorl %eax, %eax
+ movl 4 (%esp), %edx
+
+ /* Save registers. */
+ movl %ebx, (JB_BX*4)(%edx)
+ movl %esi, (JB_SI*4)(%edx)
+ movl %edi, (JB_DI*4)(%edx)
+ leal 4 (%esp), %ecx /* Save SP as it will be after we return. */
+ movl %ecx, (JB_SP*4)(%edx)
+ movl 0 (%esp), %ecx /* Save PC we are returning to now. */
+ movl %ecx, (JB_PC*4)(%edx)
+ movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
+
+ movl %eax, JB_SIZE(%edx) /* No signal mask set. */
+ ret
+.size _setjmp,.-_setjmp;
+
+
diff --git a/libc/sysdeps/linux/i386/bsd-setjmp.S b/libc/sysdeps/linux/i386/bsd-setjmp.S
new file mode 100644
index 000000000..93ae2ea8d
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bsd-setjmp.S
@@ -0,0 +1,61 @@
+/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version.
+ Copyright (C) 1995, 1996, 1997, 2000, 2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+.globl setjmp;
+.type setjmp,@function
+.align 4;
+setjmp:
+ movl 4 (%esp), %eax
+ /* Save registers. */
+ movl %ebx, (0 *4)(%eax)
+ movl %esi, (1 *4)(%eax)
+ movl %edi, (2 *4)(%eax)
+ /* Save SP as it will be after we return. */
+ leal 4 (%esp), %ecx
+ movl %ecx, (4 *4)(%eax)
+ /* Save PC we are returning to now. */
+ movl 0 (%esp), %ecx
+ movl %ecx, (5 *4)(%eax)
+ /* Save caller's frame pointer. */
+ movl %ebp, (3 *4)(%eax)
+
+ /* Call __sigjmp_save. */
+ pushl $1
+ pushl 8(%esp)
+#ifdef PIC
+ /* We cannot use the PLT, because it requires that %ebx 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
+ %ecx, which is call-clobbered. */
+ call here2
+here2: popl %ecx
+ addl $_GLOBAL_OFFSET_TABLE_+[.-here2], %ecx
+ movl __sigjmp_save @GOT (%ecx), %ecx
+ call *%ecx
+#else
+ call __sigjmp_save
+#endif
+ popl %ecx
+ popl %edx
+ ret
+.size setjmp,.-setjmp;
diff --git a/libc/sysdeps/linux/i386/setjmp.S b/libc/sysdeps/linux/i386/setjmp.S
index d38437b6b..debef7017 100644
--- a/libc/sysdeps/linux/i386/setjmp.S
+++ b/libc/sysdeps/linux/i386/setjmp.S
@@ -1,72 +1,59 @@
-/* setjmp for i386.
- Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+/* setjmp for i386, ELF version.
+ Copyright (C) 1995, 1996, 1997, 2000, 2001 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.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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.
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
#define _ASM
#define _SETJMP_H
#include <bits/setjmp.h>
+
.globl __sigsetjmp;
-.type __sigsetjmp,@function
-.align 4; \
+.type __sigsetjmp,@function
+.align 4;
+
__sigsetjmp:
- movl 4(%esp), %eax /* User's jmp_buf in %eax. */
+ movl 4 (%esp), %eax
/* Save registers. */
- movl %ebx, (JB_BX*4)(%eax)
- movl %esi, (JB_SI*4)(%eax)
- movl %edi, (JB_DI*4)(%eax)
- movl %ebp, (JB_BP*4)(%eax)
- leal 4(%esp), %ecx /* Save SP as it will be after we return. */
- movl %ecx, (JB_SP*4)(%eax)
- movl 0(%esp), %ecx /* Save PC we are returning to now. */
- movl %ecx, (JB_PC*4)(%eax)
-
- pushl 0x8(%esp) /* save mask */
- pushl 0x8(%esp) /* jump buf */
+ movl %ebx, (0 *4)(%eax)
+ movl %esi, (1 *4)(%eax)
+ movl %edi, (2 *4)(%eax)
+ /* Save SP as it will be after we return. */
+ leal 4(%esp), %ecx
+ movl %ecx, (4 *4)(%eax)
+ /* Save PC we are returning to now. */
+ movl 0(%esp), %ecx
+ movl %ecx, (5 *4)(%eax)
+ /* Save caller's frame pointer. */
+ movl %ebp, (3 *4)(%eax)
/* Make a tail call to __sigjmp_save; it takes the same args. */
-#if defined(PIC)
+#ifdef PIC
/* We cannot use the PLT, because it requires that %ebx 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
%ecx, which is call-clobbered. */
- call Lhere
-Lhere:
+ call .Lhere
+.Lhere:
popl %ecx
- addl $_GLOBAL_OFFSET_TABLE_+[.-Lhere], %ecx
- movl (__sigjmp_save)(%ecx), %ecx
- call *%ecx
+ addl $_GLOBAL_OFFSET_TABLE_+[.- .Lhere ], %ecx
+ movl __sigjmp_save @GOT (%ecx), %ecx
+ jmp *%ecx
#else
- call __sigjmp_save
+ jmp __sigjmp_save
#endif
-
- add $8, %esp
- ret
.size __sigsetjmp,.-__sigsetjmp;
-
-.globl _setjmp;
-.type _setjmp,@function
-.align 4; \
-_setjmp:
- pushl $0 /* Push zero argument. */
- pushl 0x8(%esp) /* Push jmp_buf. */
- call __sigsetjmp
- add $8, %esp
- ret
-.size _setjmp,.-_setjmp;
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 12:17:24 +0000