These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / tools / testing / selftests / x86 / raw_syscall_helper_32.S

diff --git a/kernel/tools/testing/selftests/x86/raw_syscall_helper_32.S b/kernel/tools/testing/selftests/x86/raw_syscall_helper_32.S
new file mode 100644 (file)
index 0000000..534e71e
--- /dev/null
+++ b/kernel/tools/testing/selftests/x86/raw_syscall_helper_32.S
@@ -0,0 +1,46 @@
+.global sys32_helper
+sys32_helper:
+       /* Args: syscall_args_32*, function pointer */
+       pushl   %ebp
+       pushl   %ebx
+       pushl   %esi
+       pushl   %edi
+       movl    5*4(%esp), %eax /* pointer to args struct */
+
+       movl    1*4(%eax), %ebx
+       movl    2*4(%eax), %ecx
+       movl    3*4(%eax), %edx
+       movl    4*4(%eax), %esi
+       movl    5*4(%eax), %edi
+       movl    6*4(%eax), %ebp
+       movl    0*4(%eax), %eax
+
+       call    *(6*4)(%esp)    /* Do the syscall */
+
+       /* Now we need to recover without losing any reg values */
+       pushl   %eax
+       movl    6*4(%esp), %eax
+       popl    0*4(%eax)
+       movl    %ebx, 1*4(%eax)
+       movl    %ecx, 2*4(%eax)
+       movl    %edx, 3*4(%eax)
+       movl    %esi, 4*4(%eax)
+       movl    %edi, 5*4(%eax)
+       movl    %ebp, 6*4(%eax)
+
+       popl    %edi
+       popl    %esi
+       popl    %ebx
+       popl    %ebp
+       ret
+
+       .type sys32_helper, @function
+       .size sys32_helper, .-sys32_helper
+
+.global int80_and_ret
+int80_and_ret:
+       int     $0x80
+       ret
+
+       .type int80_and_ret, @function
+       .size int80_and_ret, .-int80_and_ret