CFI_REL_OFFSET rip,RIP-ARGOFFSET
GET_THREAD_INFO(%rcx)
testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%rcx)
- CFI_REMEMBER_STATE
jnz tracesys
cmpq $__NR_syscall_max,%rax
ja badsys
* Syscall return path ending with SYSRET (fast path)
* Has incomplete stack frame and undefined top of stack.
*/
- .globl ret_from_sys_call
ret_from_sys_call:
movl $_TIF_ALLWORK_MASK,%edi
/* edi: flagmask */
TRACE_IRQS_OFF
movl threadinfo_flags(%rcx),%edx
andl %edi,%edx
- CFI_REMEMBER_STATE
jnz sysret_careful
+ CFI_REMEMBER_STATE
/*
* sysretq will re-enable interrupts:
*/
swapgs
sysretq
+ CFI_RESTORE_STATE
/* Handle reschedules */
/* edx: work, edi: workmask */
sysret_careful:
- CFI_RESTORE_STATE
bt $TIF_NEED_RESCHED,%edx
jnc sysret_signal
TRACE_IRQS_ON
sysret_signal:
TRACE_IRQS_ON
sti
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz 1f
/* Really a signal */
/* Do syscall tracing */
tracesys:
- CFI_RESTORE_STATE
SAVE_REST
movq $-ENOSYS,RAX(%rsp)
FIXUP_TOP_OF_STACK %rdi
call *sys_call_table(,%rax,8)
1: movq %rax,RAX-ARGOFFSET(%rsp)
/* Use IRET because user could have changed frame */
- jmp int_ret_from_sys_call
- CFI_ENDPROC
-END(system_call)
/*
* Syscall return path ending with IRET.
* Has correct top of stack, but partial stack frame.
- */
-ENTRY(int_ret_from_sys_call)
- CFI_STARTPROC simple
- CFI_SIGNAL_FRAME
- CFI_DEF_CFA rsp,SS+8-ARGOFFSET
- /*CFI_REL_OFFSET ss,SS-ARGOFFSET*/
- CFI_REL_OFFSET rsp,RSP-ARGOFFSET
- /*CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
- /*CFI_REL_OFFSET cs,CS-ARGOFFSET*/
- CFI_REL_OFFSET rip,RIP-ARGOFFSET
- CFI_REL_OFFSET rdx,RDX-ARGOFFSET
- CFI_REL_OFFSET rcx,RCX-ARGOFFSET
- CFI_REL_OFFSET rax,RAX-ARGOFFSET
- CFI_REL_OFFSET rdi,RDI-ARGOFFSET
- CFI_REL_OFFSET rsi,RSI-ARGOFFSET
- CFI_REL_OFFSET r8,R8-ARGOFFSET
- CFI_REL_OFFSET r9,R9-ARGOFFSET
- CFI_REL_OFFSET r10,R10-ARGOFFSET
- CFI_REL_OFFSET r11,R11-ARGOFFSET
+ */
+ .globl int_ret_from_sys_call
+int_ret_from_sys_call:
cli
TRACE_IRQS_OFF
testl $3,CS-ARGOFFSET(%rsp)
popq %rdi
CFI_ADJUST_CFA_OFFSET -8
andl $~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edi
- cli
- TRACE_IRQS_OFF
jmp int_restore_rest
int_signal:
- testl $(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_SINGLESTEP),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz 1f
movq %rsp,%rdi # &ptregs -> arg1
xorl %esi,%esi # oldset -> arg2
TRACE_IRQS_OFF
jmp int_with_check
CFI_ENDPROC
-END(int_ret_from_sys_call)
+END(system_call)
/*
* Certain special system calls that need to save a complete full stack frame.
1: incl %gs:pda_irqcount
cmoveq %gs:pda_irqstackptr,%rsp
push %rbp # backlink for old unwinder
- CFI_ADJUST_CFA_OFFSET 8
- CFI_REL_OFFSET rbp,0
/*
* We entered an interrupt context - irqs are off:
*/
jmp retint_check
retint_signal:
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz retint_swapgs
TRACE_IRQS_ON
sti
ENTRY(call_function_interrupt)
apicinterrupt CALL_FUNCTION_VECTOR,smp_call_function_interrupt
END(call_function_interrupt)
+ENTRY(irq_move_cleanup_interrupt)
+ apicinterrupt IRQ_MOVE_CLEANUP_VECTOR,smp_irq_move_cleanup_interrupt
+END(irq_move_cleanup_interrupt)
#endif
ENTRY(apic_timer_interrupt)
CFI_ADJUST_CFA_OFFSET 8
pushq %rax /* push real oldrax to the rdi slot */
CFI_ADJUST_CFA_OFFSET 8
+ CFI_REL_OFFSET rax,0
leaq \sym(%rip),%rax
jmp error_entry
CFI_ENDPROC
XCPT_FRAME
pushq %rax
CFI_ADJUST_CFA_OFFSET 8
+ CFI_REL_OFFSET rax,0
leaq \sym(%rip),%rax
jmp error_entry
CFI_ENDPROC
*/
KPROBE_ENTRY(error_entry)
_frame RDI
+ CFI_REL_OFFSET rax,0
/* rdi slot contains rax, oldrax contains error code */
cld
subq $14*8,%rsp
movq %rsi,13*8(%rsp)
CFI_REL_OFFSET rsi,RSI
movq 14*8(%rsp),%rsi /* load rax from rdi slot */
+ CFI_REGISTER rax,rsi
movq %rdx,12*8(%rsp)
CFI_REL_OFFSET rdx,RDX
movq %rcx,11*8(%rsp)
swapgs
error_sti:
movq %rdi,RDI(%rsp)
+ CFI_REL_OFFSET rdi,RDI
movq %rsp,%rdi
movq ORIG_RAX(%rsp),%rsi /* get error code */
movq $-1,ORIG_RAX(%rsp)
call do_fork
movq %rax,RAX(%rsp)
xorl %edi,%edi
- test %rax,%rax
- jnz 1f
- /* terminate stack in child */
- movq %rdi,RIP(%rsp)
-1:
/*
* It isn't worth to check for reschedule here,
incl %gs:pda_irqcount
cmove %gs:pda_irqstackptr,%rsp
push %rbp # backlink for old unwinder
- CFI_ADJUST_CFA_OFFSET 8
call __do_softirq
leaveq
CFI_DEF_CFA_REGISTER rsp
CFI_ENDPROC
ENDPROC(call_softirq)
-#ifdef CONFIG_STACK_UNWIND
-ENTRY(arch_unwind_init_running)
+KPROBE_ENTRY(ignore_sysret)
CFI_STARTPROC
- movq %r15, R15(%rdi)
- movq %r14, R14(%rdi)
- xchgq %rsi, %rdx
- movq %r13, R13(%rdi)
- movq %r12, R12(%rdi)
- xorl %eax, %eax
- movq %rbp, RBP(%rdi)
- movq %rbx, RBX(%rdi)
- movq (%rsp), %rcx
- movq %rax, R11(%rdi)
- movq %rax, R10(%rdi)
- movq %rax, R9(%rdi)
- movq %rax, R8(%rdi)
- movq %rax, RAX(%rdi)
- movq %rax, RCX(%rdi)
- movq %rax, RDX(%rdi)
- movq %rax, RSI(%rdi)
- movq %rax, RDI(%rdi)
- movq %rax, ORIG_RAX(%rdi)
- movq %rcx, RIP(%rdi)
- leaq 8(%rsp), %rcx
- movq $__KERNEL_CS, CS(%rdi)
- movq %rax, EFLAGS(%rdi)
- movq %rcx, RSP(%rdi)
- movq $__KERNEL_DS, SS(%rdi)
- jmpq *%rdx
+ mov $-ENOSYS,%eax
+ sysret
CFI_ENDPROC
-ENDPROC(arch_unwind_init_running)
-#endif
+ENDPROC(ignore_sysret)