[PATCH v4 09/27] x86: entry, annotate interrupt symbols properly

Jiri Slaby
2017-10-02T09:17:45Z

* annotate functions properly by SYM_CODE_START, SYM_CODE_START_LOCAL*
and SYM_CODE_END -- these are not C-like functions, so we have to
annotate them using CODE.
* use SYM_CODE_INNER_LABEL* for labels being in the middle of other
functions

[v4] alignments preserved

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <x86@kernel.org>
---
arch/x86/entry/entry_32.S | 15 ++++++++-------
arch/x86/entry/entry_64.S | 9 ++++-----
2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index ee6e204bfac3..5ed412379984 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -324,7 +324,7 @@ ret_from_intr:
cmpl $USER_RPL, %eax
jb resume_kernel # not returning to v8086 or userspace

-ENTRY(resume_userspace)
+SYM_CODE_INNER_LABEL(resume_userspace, SYM_V_LOCAL)
DISABLE_INTERRUPTS(CLBR_ANY)
TRACE_IRQS_OFF
movl %esp, %eax
@@ -554,10 +554,11 @@ restore_all:
INTERRUPT_RETURN

.section .fixup, "ax"
-ENTRY(iret_exc )
+SYM_CODE_START(iret_exc)
pushl $0 # no error code
pushl $do_iret_error
jmp common_exception
+SYM_CODE_END(iret_exc)
.previous
_ASM_EXTABLE(.Lirq_return, iret_exc)

@@ -649,7 +650,7 @@ END(irq_entries_start)
* so IRQ-flags tracing has to follow that:
*/
.p2align CONFIG_X86_L1_CACHE_SHIFT
-common_interrupt:
+SYM_CODE_START_LOCAL(common_interrupt)
ASM_CLAC
addl $-0x80, (%esp) /* Adjust vector into the [-256, -1] range */
SAVE_ALL
@@ -658,7 +659,7 @@ common_interrupt:
movl %esp, %eax
call do_IRQ
jmp ret_from_intr
-ENDPROC(common_interrupt)
+SYM_CODE_END(common_interrupt)

#define BUILD_INTERRUPT3(name, nr, fn) \
ENTRY(name) \
@@ -810,7 +811,7 @@ ENTRY(xen_hypervisor_callback)

jmp xen_iret_crit_fixup

-ENTRY(xen_do_upcall)
+SYM_CODE_INNER_LABEL(xen_do_upcall, SYM_V_GLOBAL)
1: mov %esp, %eax
call xen_evtchn_do_upcall
#ifndef CONFIG_PREEMPT
@@ -889,7 +890,7 @@ ENTRY(page_fault)
jmp common_exception
END(page_fault)

-common_exception:
+SYM_CODE_START_LOCAL_NOALIGN(common_exception)
/* the function address is in %gs's slot on the stack */
pushl %fs
pushl %es
@@ -919,7 +920,7 @@ common_exception:
movl %esp, %eax # pt_regs pointer
call *%edi
jmp ret_from_exception
-END(common_exception)
+SYM_CODE_END(common_exception)

ENTRY(debug)
/*
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index c7cd02cf710b..1dd3511279af 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -592,7 +592,7 @@ END(irq_entries_start)
* then jump to common_interrupt.
*/
.p2align CONFIG_X86_L1_CACHE_SHIFT
-common_interrupt:
+SYM_CODE_START_LOCAL(common_interrupt)
ASM_CLAC
addq $-0x80, (%rsp) /* Adjust vector to [-256, -1] range */
interrupt do_IRQ
@@ -643,7 +643,7 @@ restore_c_regs_and_iret:
REMOVE_PT_GPREGS_FROM_STACK 8
INTERRUPT_RETURN

-ENTRY(native_iret)
+SYM_CODE_INNER_LABEL(native_iret, SYM_V_GLOBAL)
UNWIND_HINT_IRET_REGS
/*
* Are we returning to a stack segment from the LDT? Note: in
@@ -654,8 +654,7 @@ ENTRY(native_iret)
jnz native_irq_return_ldt
#endif

-.global native_irq_return_iret
-native_irq_return_iret:
+SYM_CODE_INNER_LABEL_NOALIGN(native_irq_return_iret, SYM_V_GLOBAL)
/*
* This may fault. Non-paranoid faults on return to userspace are
* handled by fixup_bad_iret. These include #SS, #GP, and #NP.
@@ -732,7 +731,7 @@ native_irq_return_ldt:
*/
jmp native_irq_return_iret
#endif
-END(common_interrupt)
+SYM_CODE_END(common_interrupt)

/*
* APIC interrupts.
--
2.14.2