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

[linux-2.6.git] / arch / um / sys-x86_64 / setjmp.S

diff --git a/arch/um/sys-x86_64/setjmp.S b/arch/um/sys-x86_64/setjmp.S
new file mode 100644 (file)
index 0000000..45f547b
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+++ b/arch/um/sys-x86_64/setjmp.S
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+#
+# arch/x86_64/setjmp.S
+#
+# setjmp/longjmp for the x86-64 architecture
+#
+
+#
+# The jmp_buf is assumed to contain the following, in order:
+#      %rbx
+#      %rsp (post-return)
+#      %rbp
+#      %r12
+#      %r13
+#      %r14
+#      %r15
+#      <return address>
+#
+
+       .text
+       .align 4
+       .globl setjmp
+       .type setjmp, @function
+setjmp:
+       pop  %rsi                       # Return address, and adjust the stack
+       xorl %eax,%eax                  # Return value
+       movq %rbx,(%rdi)
+       movq %rsp,8(%rdi)               # Post-return %rsp!
+       push %rsi                       # Make the call/return stack happy
+       movq %rbp,16(%rdi)
+       movq %r12,24(%rdi)
+       movq %r13,32(%rdi)
+       movq %r14,40(%rdi)
+       movq %r15,48(%rdi)
+       movq %rsi,56(%rdi)              # Return address
+       ret
+
+       .size setjmp,.-setjmp
+
+       .text
+       .align 4
+       .globl longjmp
+       .type longjmp, @function
+longjmp:
+       movl %esi,%eax                  # Return value (int)
+       movq (%rdi),%rbx
+       movq 8(%rdi),%rsp
+       movq 16(%rdi),%rbp
+       movq 24(%rdi),%r12
+       movq 32(%rdi),%r13
+       movq 40(%rdi),%r14
+       movq 48(%rdi),%r15
+       jmp *56(%rdi)
+
+       .size longjmp,.-longjmp