UIO: Fix mapping of logical and virtual memory

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / entry_32.S

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index cdfd94cc6b14e4fd1c06c058904e13c2f6575810..b21fbfaffe391a974d10d7417a9f00c99ab05228 100644 (file)
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -54,6 +54,16 @@
 #include <asm/ftrace.h>
 #include <asm/irq_vectors.h>
 
+/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this.  */
+#include <linux/elf-em.h>
+#define AUDIT_ARCH_I386                (EM_386|__AUDIT_ARCH_LE)
+#define __AUDIT_ARCH_LE           0x40000000
+
+#ifndef CONFIG_AUDITSYSCALL
+#define sysenter_audit syscall_trace_entry
+#define sysexit_audit  syscall_exit_work
+#endif
+
 /*
  * We use macros for low-level operations which need to be overridden
  * for paravirtualization.  The following will never clobber any registers:
@@ -333,7 +343,8 @@ sysenter_past_esp:
 
        /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
        testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
-       jnz syscall_trace_entry
+       jnz sysenter_audit
+sysenter_do_call:
        cmpl $(nr_syscalls), %eax
        jae syscall_badsys
        call *sys_call_table(,%eax,4)
@@ -343,7 +354,8 @@ sysenter_past_esp:
        TRACE_IRQS_OFF
        movl TI_flags(%ebp), %ecx
        testw $_TIF_ALLWORK_MASK, %cx
-       jne syscall_exit_work
+       jne sysexit_audit
+sysenter_exit:
 /* if something modifies registers it must also disable sysexit */
        movl PT_EIP(%esp), %edx
        movl PT_OLDESP(%esp), %ecx
@@ -351,6 +363,45 @@ sysenter_past_esp:
        TRACE_IRQS_ON
 1:     mov  PT_FS(%esp), %fs
        ENABLE_INTERRUPTS_SYSEXIT
+
+#ifdef CONFIG_AUDITSYSCALL
+sysenter_audit:
+       testw $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
+       jnz syscall_trace_entry
+       addl $4,%esp
+       CFI_ADJUST_CFA_OFFSET -4
+       /* %esi already in 8(%esp)         6th arg: 4th syscall arg */
+       /* %edx already in 4(%esp)         5th arg: 3rd syscall arg */
+       /* %ecx already in 0(%esp)         4th arg: 2nd syscall arg */
+       movl %ebx,%ecx                  /* 3rd arg: 1st syscall arg */
+       movl %eax,%edx                  /* 2nd arg: syscall number */
+       movl $AUDIT_ARCH_I386,%eax      /* 1st arg: audit arch */
+       call audit_syscall_entry
+       pushl %ebx
+       CFI_ADJUST_CFA_OFFSET 4
+       movl PT_EAX(%esp),%eax          /* reload syscall number */
+       jmp sysenter_do_call
+
+sysexit_audit:
+       testw $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
+       jne syscall_exit_work
+       TRACE_IRQS_ON
+       ENABLE_INTERRUPTS(CLBR_ANY)
+       movl %eax,%edx          /* second arg, syscall return value */
+       cmpl $0,%eax            /* is it < 0? */
+       setl %al                /* 1 if so, 0 if not */
+       movzbl %al,%eax         /* zero-extend that */
+       inc %eax /* first arg, 0->1(AUDITSC_SUCCESS), 1->2(AUDITSC_FAILURE) */
+       call audit_syscall_exit
+       DISABLE_INTERRUPTS(CLBR_ANY)
+       TRACE_IRQS_OFF
+       movl TI_flags(%ebp), %ecx
+       testw $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
+       jne syscall_exit_work
+       movl PT_EAX(%esp),%eax  /* reload syscall return value */
+       jmp sysenter_exit
+#endif
+
        CFI_ENDPROC
 .pushsection .fixup,"ax"
 2:     movl $0,PT_FS(%esp)
@@ -679,6 +730,7 @@ error_code:
        movl $(__USER_DS), %ecx
        movl %ecx, %ds
        movl %ecx, %es
+       TRACE_IRQS_OFF
        movl %esp,%eax                  # pt_regs pointer
        call *%edi
        jmp ret_from_exception
@@ -709,20 +761,9 @@ ENTRY(device_not_available)
        RING0_INT_FRAME
        pushl $-1                       # mark this as an int
        CFI_ADJUST_CFA_OFFSET 4
-       SAVE_ALL
-       GET_CR0_INTO_EAX
-       testl $0x4, %eax                # EM (math emulation bit)
-       jne device_not_available_emulate
-       preempt_stop(CLBR_ANY)
-       call math_state_restore
-       jmp ret_from_exception
-device_not_available_emulate:
-       pushl $0                        # temporary storage for ORIG_EIP
+       pushl $do_device_not_available
        CFI_ADJUST_CFA_OFFSET 4
-       call math_emulate
-       addl $4, %esp
-       CFI_ADJUST_CFA_OFFSET -4
-       jmp ret_from_exception
+       jmp error_code
        CFI_ENDPROC
 END(device_not_available)
 
@@ -763,6 +804,7 @@ debug_stack_correct:
        pushl $-1                       # mark this as an int
        CFI_ADJUST_CFA_OFFSET 4
        SAVE_ALL
+       TRACE_IRQS_OFF
        xorl %edx,%edx                  # error code 0
        movl %esp,%eax                  # pt_regs pointer
        call do_debug
@@ -807,6 +849,7 @@ nmi_stack_correct:
        pushl %eax
        CFI_ADJUST_CFA_OFFSET 4
        SAVE_ALL
+       TRACE_IRQS_OFF
        xorl %edx,%edx          # zero error code
        movl %esp,%eax          # pt_regs pointer
        call do_nmi
@@ -847,6 +890,7 @@ nmi_espfix_stack:
        pushl %eax
        CFI_ADJUST_CFA_OFFSET 4
        SAVE_ALL
+       TRACE_IRQS_OFF
        FIXUP_ESPFIX_STACK              # %eax == %esp
        xorl %edx,%edx                  # zero error code
        call do_nmi
@@ -877,6 +921,7 @@ KPROBE_ENTRY(int3)
        pushl $-1                       # mark this as an int
        CFI_ADJUST_CFA_OFFSET 4
        SAVE_ALL
+       TRACE_IRQS_OFF
        xorl %edx,%edx          # zero error code
        movl %esp,%eax          # pt_regs pointer
        call do_int3
@@ -979,7 +1024,7 @@ ENTRY(machine_check)
        RING0_INT_FRAME
        pushl $0
        CFI_ADJUST_CFA_OFFSET 4
-       pushl machine_check_vector
+       pushl $do_machine_check
        CFI_ADJUST_CFA_OFFSET 4
        jmp error_code
        CFI_ENDPROC