This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / um / sys-i386 / setjmp.S

diff --git a/arch/um/sys-i386/setjmp.S b/arch/um/sys-i386/setjmp.S
new file mode 100644 (file)
index 0000000..b766792
--- /dev/null
+++ b/arch/um/sys-i386/setjmp.S
@@ -0,0 +1,58 @@
+#
+# arch/i386/setjmp.S
+#
+# setjmp/longjmp for the i386 architecture
+#
+
+#
+# The jmp_buf is assumed to contain the following, in order:
+#      %ebx
+#      %esp
+#      %ebp
+#      %esi
+#      %edi
+#      <return address>
+#
+
+       .text
+       .align 4
+       .globl setjmp
+       .type setjmp, @function
+setjmp:
+#ifdef _REGPARM
+       movl %eax,%edx
+#else
+       movl 4(%esp),%edx
+#endif
+       popl %ecx                       # Return address, and adjust the stack
+       xorl %eax,%eax                  # Return value
+       movl %ebx,(%edx)
+       movl %esp,4(%edx)               # Post-return %esp!
+       pushl %ecx                      # Make the call/return stack happy
+       movl %ebp,8(%edx)
+       movl %esi,12(%edx)
+       movl %edi,16(%edx)
+       movl %ecx,20(%edx)              # Return address
+       ret
+
+       .size setjmp,.-setjmp
+
+       .text
+       .align 4
+       .globl longjmp
+       .type longjmp, @function
+longjmp:
+#ifdef _REGPARM
+       xchgl %eax,%edx
+#else
+       movl 4(%esp),%edx               # jmp_ptr address
+       movl 8(%esp),%eax               # Return value
+#endif
+       movl (%edx),%ebx
+       movl 4(%edx),%esp
+       movl 8(%edx),%ebp
+       movl 12(%edx),%esi
+       movl 16(%edx),%edi
+       jmp *20(%edx)
+
+       .size longjmp,.-longjmp