Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild

[pandora-kernel.git] / arch / x86_64 / ia32 / ia32entry.S

diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S
index 4ec594a..9b5bb41 100644 (file)
--- a/arch/x86_64/ia32/ia32entry.S
+++ b/arch/x86_64/ia32/ia32entry.S
@@ -13,6 +13,7 @@
 #include <asm/thread_info.h>   
 #include <asm/segment.h>
 #include <asm/vsyscall32.h>
+#include <asm/irqflags.h>
 #include <linux/linkage.h>
 
 #define IA32_NR_syscalls ((ia32_syscall_end - ia32_sys_call_table)/8)
@@ -75,6 +76,10 @@ ENTRY(ia32_sysenter_target)
        swapgs
        movq    %gs:pda_kernelstack, %rsp
        addq    $(PDA_STACKOFFSET),%rsp 
+       /*
+        * No need to follow this irqs on/off section: the syscall
+        * disabled irqs, here we enable it straight after entry:
+        */
        sti     
        movl    %ebp,%ebp               /* zero extension */
        pushq   $__USER32_DS
@@ -118,6 +123,7 @@ sysenter_do_call:
        movq    %rax,RAX-ARGOFFSET(%rsp)
        GET_THREAD_INFO(%r10)
        cli
+       TRACE_IRQS_OFF
        testl   $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
        jnz     int_ret_from_sys_call
        andl    $~TS_COMPAT,threadinfo_status(%r10)
@@ -132,6 +138,7 @@ sysenter_do_call:
        CFI_REGISTER rsp,rcx
        movl    $VSYSCALL32_SYSEXIT,%edx        /* User %eip */
        CFI_REGISTER rip,rdx
+       TRACE_IRQS_ON
        swapgs
        sti             /* sti only takes effect after the next instruction */
        /* sysexit */
@@ -155,6 +162,7 @@ sysenter_tracesys:
        .previous
        jmp     sysenter_do_call
        CFI_ENDPROC
+ENDPROC(ia32_sysenter_target)
 
 /*
  * 32bit SYSCALL instruction entry.
@@ -178,13 +186,17 @@ sysenter_tracesys:
  */    
 ENTRY(ia32_cstar_target)
        CFI_STARTPROC32 simple
-       CFI_DEF_CFA     rsp,0
+       CFI_DEF_CFA     rsp,PDA_STACKOFFSET
        CFI_REGISTER    rip,rcx
        /*CFI_REGISTER  rflags,r11*/
        swapgs
        movl    %esp,%r8d
        CFI_REGISTER    rsp,r8
        movq    %gs:pda_kernelstack,%rsp
+       /*
+        * No need to follow this irqs on/off section: the syscall
+        * disabled irqs and here we enable it straight after entry:
+        */
        sti
        SAVE_ARGS 8,1,1
        movl    %eax,%eax       /* zero extension */
@@ -219,6 +231,7 @@ cstar_do_call:
        movq %rax,RAX-ARGOFFSET(%rsp)
        GET_THREAD_INFO(%r10)
        cli
+       TRACE_IRQS_OFF
        testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
        jnz  int_ret_from_sys_call
        andl $~TS_COMPAT,threadinfo_status(%r10)
@@ -227,6 +240,7 @@ cstar_do_call:
        CFI_REGISTER rip,rcx
        movl EFLAGS-ARGOFFSET(%rsp),%r11d       
        /*CFI_REGISTER rflags,r11*/
+       TRACE_IRQS_ON
        movl RSP-ARGOFFSET(%rsp),%esp
        CFI_RESTORE rsp
        swapgs
@@ -249,6 +263,7 @@ cstar_tracesys:
        .quad 1b,ia32_badarg
        .previous
        jmp cstar_do_call
+END(ia32_cstar_target)
                                
 ia32_badarg:
        movq $-EFAULT,%rax
@@ -284,7 +299,11 @@ ENTRY(ia32_syscall)
        /*CFI_REL_OFFSET        rflags,EFLAGS-RIP*/
        /*CFI_REL_OFFSET        cs,CS-RIP*/
        CFI_REL_OFFSET  rip,RIP-RIP
-       swapgs  
+       swapgs
+       /*
+        * No need to follow this irqs on/off section: the syscall
+        * disabled irqs and here we enable it straight after entry:
+        */
        sti
        movl %eax,%eax
        pushq %rax
@@ -314,16 +333,13 @@ ia32_tracesys:
        LOAD_ARGS ARGOFFSET  /* reload args from stack in case ptrace changed it */
        RESTORE_REST
        jmp ia32_do_syscall
+END(ia32_syscall)
 
 ia32_badsys:
        movq $0,ORIG_RAX-ARGOFFSET(%rsp)
        movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
        jmp int_ret_from_sys_call
 
-ni_syscall:
-       movq %rax,%rdi
-       jmp  sys32_ni_syscall                   
-
 quiet_ni_syscall:
        movq $-ENOSYS,%rax
        ret
@@ -370,10 +386,10 @@ ENTRY(ia32_ptregs_common)
        RESTORE_REST
        jmp  ia32_sysret        /* misbalances the return cache */
        CFI_ENDPROC
+END(ia32_ptregs_common)
 
        .section .rodata,"a"
        .align 8
-       .globl ia32_sys_call_table
 ia32_sys_call_table:
        .quad sys_restart_syscall
        .quad sys_exit