x86: Merge sys_clone

[karo-tx-linux.git] / arch / x86 / kernel / entry_32.S

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index beb30da203d64548c9d5c3cbc411fe1b43f31f35..6492555d123de89b95f5884317ce0e21405246f1 100644 (file)
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -725,22 +725,61 @@ END(syscall_badsys)
 /*
  * System calls that need a pt_regs pointer.
  */
-#define PTREGSCALL(name) \
+#define PTREGSCALL0(name) \
        ALIGN; \
 ptregs_##name: \
        leal 4(%esp),%eax; \
        jmp sys_##name;
 
-PTREGSCALL(iopl)
-PTREGSCALL(fork)
-PTREGSCALL(clone)
-PTREGSCALL(vfork)
-PTREGSCALL(execve)
-PTREGSCALL(sigaltstack)
-PTREGSCALL(sigreturn)
-PTREGSCALL(rt_sigreturn)
-PTREGSCALL(vm86)
-PTREGSCALL(vm86old)
+#define PTREGSCALL1(name) \
+       ALIGN; \
+ptregs_##name: \
+       leal 4(%esp),%edx; \
+       movl PT_EBX(%edx),%eax; \
+       jmp sys_##name;
+
+#define PTREGSCALL2(name) \
+       ALIGN; \
+ptregs_##name: \
+       leal 4(%esp),%ecx; \
+       movl PT_ECX(%ecx),%edx; \
+       movl PT_EBX(%ecx),%eax; \
+       jmp sys_##name;
+
+#define PTREGSCALL3(name) \
+       ALIGN; \
+ptregs_##name: \
+       leal 4(%esp),%eax; \
+       pushl %eax; \
+       movl PT_EDX(%eax),%ecx; \
+       movl PT_ECX(%eax),%edx; \
+       movl PT_EBX(%eax),%eax; \
+       call sys_##name; \
+       addl $4,%esp; \
+       ret
+
+PTREGSCALL1(iopl)
+PTREGSCALL0(fork)
+PTREGSCALL0(vfork)
+PTREGSCALL3(execve)
+PTREGSCALL2(sigaltstack)
+PTREGSCALL0(sigreturn)
+PTREGSCALL0(rt_sigreturn)
+PTREGSCALL2(vm86)
+PTREGSCALL1(vm86old)
+
+/* Clone is an oddball.  The 4th arg is in %edi */
+       ALIGN;
+ptregs_clone:
+       leal 4(%esp),%eax
+       pushl %eax
+       pushl PT_EDI(%eax)
+       movl PT_EDX(%eax),%ecx
+       movl PT_ECX(%eax),%edx
+       movl PT_EBX(%eax),%eax
+       call sys_clone
+       addl $8,%esp
+       ret
 
 .macro FIXUP_ESPFIX_STACK
 /*
@@ -1209,17 +1248,14 @@ END(ftrace_graph_caller)
 
 .globl return_to_handler
 return_to_handler:
-       pushl $0
        pushl %eax
-       pushl %ecx
        pushl %edx
        movl %ebp, %eax
        call ftrace_return_to_handler
-       movl %eax, 0xc(%esp)
+       movl %eax, %ecx
        popl %edx
-       popl %ecx
        popl %eax
-       ret
+       jmp *%ecx
 #endif
 
 .section .rodata,"a"