[PATCH v6 26/28] x86_32/asm: change all ENTRY+END to SYM_CODE_*

From: Jiri Slaby
Date: Fri May 18 2018 - 04:22:36 EST

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Here, we change all assembly code which is marked using END (and not
ENDPROC). We switch all these to appropriate new markings SYM_CODE_START
and SYM_CODE_END.

And since we removed the last user of END on X86, make sure, that END is
not defined there.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
---
arch/x86/entry/entry_32.S | 104 ++++++++++++++++++++++----------------------
arch/x86/kernel/ftrace_32.S | 12 ++---
include/linux/linkage.h | 2 +
3 files changed, 60 insertions(+), 58 deletions(-)

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 75d9670bffd8..ec2ea6379582 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -227,7 +227,7 @@
* %eax: prev task
* %edx: next task
*/
-ENTRY(__switch_to_asm)
+SYM_CODE_START(__switch_to_asm)
/*
* Save callee-saved registers
* This must match the order in struct inactive_task_frame
@@ -264,7 +264,7 @@ ENTRY(__switch_to_asm)
popl %ebp

jmp __switch_to
-END(__switch_to_asm)
+SYM_CODE_END(__switch_to_asm)

/*
* The unwinder expects the last frame on the stack to always be at the same
@@ -290,7 +290,7 @@ ENDPROC(schedule_tail_wrapper)
* ebx: kernel thread func (NULL for user thread)
* edi: kernel thread arg
*/
-ENTRY(ret_from_fork)
+SYM_CODE_START(ret_from_fork)
call schedule_tail_wrapper

testl %ebx, %ebx
@@ -313,7 +313,7 @@ ENTRY(ret_from_fork)
*/
movl $0, PT_EAX(%esp)
jmp 2b
-END(ret_from_fork)
+SYM_CODE_END(ret_from_fork)

/*
* Return to user mode is not as complex as all this looks,
@@ -349,7 +349,7 @@ SYM_INNER_LABEL_ALIGN(resume_userspace, SYM_L_LOCAL)
SYM_CODE_END(ret_from_exception)

#ifdef CONFIG_PREEMPT
-ENTRY(resume_kernel)
+SYM_CODE_START(resume_kernel)
DISABLE_INTERRUPTS(CLBR_ANY)
.Lneed_resched:
cmpl $0, PER_CPU_VAR(__preempt_count)
@@ -358,7 +358,7 @@ ENTRY(resume_kernel)
jz restore_all
call preempt_schedule_irq
jmp .Lneed_resched
-END(resume_kernel)
+SYM_CODE_END(resume_kernel)
#endif

SYM_ENTRY(__begin_SYSENTER_singlestep_region, SYM_L_GLOBAL, SYM_A_NONE)
@@ -661,7 +661,7 @@ ENDPROC(entry_INT80_32)
* We pack 1 stub into every 8-byte block.
*/
.align 8
-ENTRY(irq_entries_start)
+SYM_CODE_START(irq_entries_start)
vector=FIRST_EXTERNAL_VECTOR
.rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR)
pushl $(~vector+0x80) /* Note: always in signed byte range */
@@ -669,7 +669,7 @@ ENTRY(irq_entries_start)
jmp common_interrupt
.align 8
.endr
-END(irq_entries_start)
+SYM_CODE_END(irq_entries_start)

/*
* the CPU automatically disables interrupts when executing an IRQ vector,
@@ -705,14 +705,14 @@ ENDPROC(name)
/* The include is where all of the SMP etc. interrupts come from */
#include <asm/entry_arch.h>

-ENTRY(coprocessor_error)
+SYM_CODE_START(coprocessor_error)
ASM_CLAC
pushl $0
pushl $do_coprocessor_error
jmp common_exception
-END(coprocessor_error)
+SYM_CODE_END(coprocessor_error)

-ENTRY(simd_coprocessor_error)
+SYM_CODE_START(simd_coprocessor_error)
ASM_CLAC
pushl $0
#ifdef CONFIG_X86_INVD_BUG
@@ -724,96 +724,96 @@ ENTRY(simd_coprocessor_error)
pushl $do_simd_coprocessor_error
#endif
jmp common_exception
-END(simd_coprocessor_error)
+SYM_CODE_END(simd_coprocessor_error)

-ENTRY(device_not_available)
+SYM_CODE_START(device_not_available)
ASM_CLAC
pushl $-1 # mark this as an int
pushl $do_device_not_available
jmp common_exception
-END(device_not_available)
+SYM_CODE_END(device_not_available)

#ifdef CONFIG_PARAVIRT
-ENTRY(native_iret)
+SYM_CODE_START(native_iret)
iret
_ASM_EXTABLE(native_iret, iret_exc)
-END(native_iret)
+SYM_CODE_END(native_iret)
#endif

-ENTRY(overflow)
+SYM_CODE_START(overflow)
ASM_CLAC
pushl $0
pushl $do_overflow
jmp common_exception
-END(overflow)
+SYM_CODE_END(overflow)

-ENTRY(bounds)
+SYM_CODE_START(bounds)
ASM_CLAC
pushl $0
pushl $do_bounds
jmp common_exception
-END(bounds)
+SYM_CODE_END(bounds)

-ENTRY(invalid_op)
+SYM_CODE_START(invalid_op)
ASM_CLAC
pushl $0
pushl $do_invalid_op
jmp common_exception
-END(invalid_op)
+SYM_CODE_END(invalid_op)

-ENTRY(coprocessor_segment_overrun)
+SYM_CODE_START(coprocessor_segment_overrun)
ASM_CLAC
pushl $0
pushl $do_coprocessor_segment_overrun
jmp common_exception
-END(coprocessor_segment_overrun)
+SYM_CODE_END(coprocessor_segment_overrun)

-ENTRY(invalid_TSS)
+SYM_CODE_START(invalid_TSS)
ASM_CLAC
pushl $do_invalid_TSS
jmp common_exception
-END(invalid_TSS)
+SYM_CODE_END(invalid_TSS)

-ENTRY(segment_not_present)
+SYM_CODE_START(segment_not_present)
ASM_CLAC
pushl $do_segment_not_present
jmp common_exception
-END(segment_not_present)
+SYM_CODE_END(segment_not_present)

-ENTRY(stack_segment)
+SYM_CODE_START(stack_segment)
ASM_CLAC
pushl $do_stack_segment
jmp common_exception
-END(stack_segment)
+SYM_CODE_END(stack_segment)

-ENTRY(alignment_check)
+SYM_CODE_START(alignment_check)
ASM_CLAC
pushl $do_alignment_check
jmp common_exception
-END(alignment_check)
+SYM_CODE_END(alignment_check)

-ENTRY(divide_error)
+SYM_CODE_START(divide_error)
ASM_CLAC
pushl $0 # no error code
pushl $do_divide_error
jmp common_exception
-END(divide_error)
+SYM_CODE_END(divide_error)

#ifdef CONFIG_X86_MCE
-ENTRY(machine_check)
+SYM_CODE_START(machine_check)
ASM_CLAC
pushl $0
pushl machine_check_vector
jmp common_exception
-END(machine_check)
+SYM_CODE_END(machine_check)
#endif

-ENTRY(spurious_interrupt_bug)
+SYM_CODE_START(spurious_interrupt_bug)
ASM_CLAC
pushl $0
pushl $do_spurious_interrupt_bug
jmp common_exception
-END(spurious_interrupt_bug)
+SYM_CODE_END(spurious_interrupt_bug)

#ifdef CONFIG_XEN
ENTRY(xen_hypervisor_callback)
@@ -915,12 +915,12 @@ BUILD_INTERRUPT3(hv_stimer0_callback_vector, HYPERV_STIMER0_VECTOR,

#endif /* CONFIG_HYPERV */

-ENTRY(page_fault)
+SYM_CODE_START(page_fault)
ASM_CLAC
pushl $do_page_fault
ALIGN
jmp common_exception
-END(page_fault)
+SYM_CODE_END(page_fault)

SYM_CODE_START_LOCAL_NOALIGN(common_exception)
/* the function address is in %gs's slot on the stack */
@@ -954,7 +954,7 @@ SYM_CODE_START_LOCAL_NOALIGN(common_exception)
jmp ret_from_exception
SYM_CODE_END(common_exception)

-ENTRY(debug)
+SYM_CODE_START(debug)
/*
* #DB can happen at the first instruction of
* entry_SYSENTER_32 or in Xen's SYSENTER prologue. If this
@@ -990,7 +990,7 @@ ENTRY(debug)
call do_debug
movl %ebx, %esp
jmp ret_from_exception
-END(debug)
+SYM_CODE_END(debug)

/*
* NMI is doubly nasty. It can happen on the first instruction of
@@ -999,7 +999,7 @@ END(debug)
* switched stacks. We handle both conditions by simply checking whether we
* interrupted kernel code running on the SYSENTER stack.
*/
-ENTRY(nmi)
+SYM_CODE_START(nmi)
ASM_CLAC
#ifdef CONFIG_X86_ESPFIX32
pushl %eax
@@ -1059,9 +1059,9 @@ ENTRY(nmi)
lss 12+4(%esp), %esp # back to espfix stack
jmp .Lirq_return
#endif
-END(nmi)
+SYM_CODE_END(nmi)

-ENTRY(int3)
+SYM_CODE_START(int3)
ASM_CLAC
pushl $-1 # mark this as an int
SAVE_ALL
@@ -1071,22 +1071,22 @@ ENTRY(int3)
movl %esp, %eax # pt_regs pointer
call do_int3
jmp ret_from_exception
-END(int3)
+SYM_CODE_END(int3)

-ENTRY(general_protection)
+SYM_CODE_START(general_protection)
pushl $do_general_protection
jmp common_exception
-END(general_protection)
+SYM_CODE_END(general_protection)

#ifdef CONFIG_KVM_GUEST
-ENTRY(async_page_fault)
+SYM_CODE_START(async_page_fault)
ASM_CLAC
pushl $do_async_page_fault
jmp common_exception
-END(async_page_fault)
+SYM_CODE_END(async_page_fault)
#endif

-ENTRY(rewind_stack_do_exit)
+SYM_CODE_START(rewind_stack_do_exit)
/* Prevent any naive code from trying to unwind to our caller. */
xorl %ebp, %ebp

@@ -1095,4 +1095,4 @@ ENTRY(rewind_stack_do_exit)

call do_exit
1: jmp 1b
-END(rewind_stack_do_exit)
+SYM_CODE_END(rewind_stack_do_exit)
diff --git a/arch/x86/kernel/ftrace_32.S b/arch/x86/kernel/ftrace_32.S
index f4dca7df8ad6..f519c22f6f9e 100644
--- a/arch/x86/kernel/ftrace_32.S
+++ b/arch/x86/kernel/ftrace_32.S
@@ -35,7 +35,7 @@ SYM_FUNC_START(function_hook)
ret
SYM_FUNC_END(function_hook)

-ENTRY(ftrace_caller)
+SYM_CODE_START(ftrace_caller)

#ifdef USING_FRAME_POINTER
# ifdef CC_USING_FENTRY
@@ -100,7 +100,7 @@ ftrace_graph_call:
/* This is weak to keep gas from relaxing the jumps */
WEAK(ftrace_stub)
ret
-END(ftrace_caller)
+SYM_CODE_END(ftrace_caller)

SYM_CODE_START(ftrace_regs_caller)
/*
@@ -173,7 +173,7 @@ SYM_INNER_LABEL(ftrace_regs_call, SYM_L_GLOBAL)
SYM_CODE_END(ftrace_regs_caller)
#else /* ! CONFIG_DYNAMIC_FTRACE */

-ENTRY(function_hook)
+SYM_CODE_START(function_hook)
cmpl $__PAGE_OFFSET, %esp
jb ftrace_stub /* Paging not enabled yet? */

@@ -206,11 +206,11 @@ ftrace_stub:
popl %ecx
popl %eax
jmp ftrace_stub
-END(function_hook)
+SYM_CODE_END(function_hook)
#endif /* CONFIG_DYNAMIC_FTRACE */

#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-ENTRY(ftrace_graph_caller)
+SYM_CODE_START(ftrace_graph_caller)
pushl %eax
pushl %ecx
pushl %edx
@@ -229,7 +229,7 @@ ENTRY(ftrace_graph_caller)
popl %ecx
popl %eax
ret
-END(ftrace_graph_caller)
+SYM_CODE_END(ftrace_graph_caller)

.globl return_to_handler
return_to_handler:
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index a57da818d88f..1b06f6b45198 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -120,11 +120,13 @@
SYM_FUNC_START_WEAK_NOALIGN(name)
#endif

+#ifndef CONFIG_X86
#ifndef END
/* deprecated, use SYM_FUNC_END, SYM_DATA_END, or SYM_END */
#define END(name) \
.size name, .-name
#endif
+#endif /* CONFIG_X86 */

#ifndef CONFIG_X86_64
/* If symbol 'name' is treated as a subroutine (gets called, and returns)
--
2.16.3

Next message: Jiri Slaby: "[PATCH v6 15/28] x86/asm/purgatory: start using annotations"
Previous message: Jiri Slaby: "[PATCH v6 25/28] x86_32/asm: add ENDs to some functions and relabel with SYM_CODE_*"
In reply to: Jiri Slaby: "[PATCH v6 25/28] x86_32/asm: add ENDs to some functions and relabel with SYM_CODE_*"
Next in thread: Jiri Slaby: "[PATCH v6 15/28] x86/asm/purgatory: start using annotations"
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