summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/entry_64.S
diff options
context:
space:
mode:
authorAl Viro <viro@zeniv.linux.org.uk>2012-10-22 22:34:11 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-11-28 22:13:44 -0500
commit1d4b4b2994b5fc208963c0b795291f8c1f18becf (patch)
treebefe27a3e2abc333b5bd81ee7381e4c5541f543f /arch/x86/kernel/entry_64.S
parent71613c3b871c5a9f27cc48f124251bcd3aa23be1 (diff)
downloadop-kernel-dev-1d4b4b2994b5fc208963c0b795291f8c1f18becf.zip
op-kernel-dev-1d4b4b2994b5fc208963c0b795291f8c1f18becf.tar.gz
x86, um: switch to generic fork/vfork/clone
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
-rw-r--r--arch/x86/kernel/entry_64.S22
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 1328fe4..2363e82 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -845,9 +845,25 @@ ENTRY(\label)
END(\label)
.endm
- PTREGSCALL stub_clone, sys_clone, %r8
- PTREGSCALL stub_fork, sys_fork, %rdi
- PTREGSCALL stub_vfork, sys_vfork, %rdi
+ .macro FORK_LIKE func
+ENTRY(stub_\func)
+ CFI_STARTPROC
+ popq %r11 /* save return address */
+ PARTIAL_FRAME 0
+ SAVE_REST
+ pushq %r11 /* put it back on stack */
+ FIXUP_TOP_OF_STACK %r11, 8
+ DEFAULT_FRAME 0 8 /* offset 8: return address */
+ call sys_\func
+ RESTORE_TOP_OF_STACK %r11, 8
+ ret $REST_SKIP /* pop extended registers */
+ CFI_ENDPROC
+END(stub_\func)
+ .endm
+
+ FORK_LIKE clone
+ FORK_LIKE fork
+ FORK_LIKE vfork
PTREGSCALL stub_sigaltstack, sys_sigaltstack, %rdx
PTREGSCALL stub_iopl, sys_iopl, %rsi
OpenPOWER on IntegriCloud