diff options
| author | Al Viro <viro@ftp.linux.org.uk> | 2011-08-18 20:06:39 +0100 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2011-11-02 14:15:05 +0100 |
| commit | 5c48b108ecbf6505d929e64d50dace13ac2bdf34 (patch) | |
| tree | 016904f84fbe05aa301c5cdfe712d90f6bb828fe /arch/x86/um/setjmp_32.S | |
| parent | 7bbe7204e93734fe79d8aac3e08a7cb4624b5004 (diff) | |
um: take arch/um/sys-x86 to arch/x86/um
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/x86/um/setjmp_32.S')
| -rw-r--r-- | arch/x86/um/setjmp_32.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/x86/um/setjmp_32.S b/arch/x86/um/setjmp_32.S new file mode 100644 index 000000000000..b766792c9933 --- /dev/null +++ b/arch/x86/um/setjmp_32.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 |