[tip: x86/asm] x86/asm/32: Change all ENTRY+END to SYM_CODE_*

From: tip-bot2 for Jiri Slaby
Date: Fri Oct 18 2019 - 12:32:35 EST

The following commit has been merged into the x86/asm branch of tip:

Commit-ID: 5e63306f1629527799e34a9814dd8035df6ca854
Gitweb: https://git.kernel.org/tip/5e63306f1629527799e34a9814dd8035df6ca854
Author: Jiri Slaby <jslaby@xxxxxxx>
AuthorDate: Fri, 11 Oct 2019 13:51:06 +02:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Fri, 18 Oct 2019 12:00:43 +02:00

x86/asm/32: Change all ENTRY+END to SYM_CODE_*

Change all assembly code which is marked using END (and not ENDPROC) to
appropriate new markings SYM_CODE_START and SYM_CODE_END.

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

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx>
Cc: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: x86-ml <x86@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20191011115108.12392-27-jslaby@xxxxxxx
---
arch/x86/entry/entry_32.S | 104 +++++++++++++++++------------------
arch/x86/kernel/ftrace_32.S | 8 +--
include/linux/linkage.h | 2 +-
3 files changed, 58 insertions(+), 56 deletions(-)

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 64fe7aa..0ecc12f 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -709,7 +709,7 @@
* %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
@@ -748,7 +748,7 @@ 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
@@ -774,7 +774,7 @@ 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
@@ -797,7 +797,7 @@ 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,
@@ -1161,7 +1161,7 @@ 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 */
@@ -1169,11 +1169,11 @@ ENTRY(irq_entries_start)
jmp common_interrupt
.align 8
.endr
-END(irq_entries_start)
+SYM_CODE_END(irq_entries_start)

#ifdef CONFIG_X86_LOCAL_APIC
.align 8
-ENTRY(spurious_entries_start)
+SYM_CODE_START(spurious_entries_start)
vector=FIRST_SYSTEM_VECTOR
.rept (NR_VECTORS - FIRST_SYSTEM_VECTOR)
pushl $(~vector+0x80) /* Note: always in signed byte range */
@@ -1181,7 +1181,7 @@ ENTRY(spurious_entries_start)
jmp common_spurious
.align 8
.endr
-END(spurious_entries_start)
+SYM_CODE_END(spurious_entries_start)

SYM_CODE_START_LOCAL(common_spurious)
ASM_CLAC
@@ -1230,14 +1230,14 @@ 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
@@ -1249,96 +1249,96 @@ 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_PV
ENTRY(xen_hypervisor_callback)
@@ -1442,11 +1442,11 @@ 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
jmp common_exception_read_cr2
-END(page_fault)
+SYM_CODE_END(page_fault)

SYM_CODE_START_LOCAL_NOALIGN(common_exception_read_cr2)
/* the function address is in %gs's slot on the stack */
@@ -1495,7 +1495,7 @@ SYM_CODE_START_LOCAL_NOALIGN(common_exception)
jmp ret_from_exception
SYM_CODE_END(common_exception)

-ENTRY(debug)
+SYM_CODE_START(debug)
/*
* Entry from sysenter is now handled in common_exception
*/
@@ -1503,7 +1503,7 @@ ENTRY(debug)
pushl $-1 # mark this as an int
pushl $do_debug
jmp common_exception
-END(debug)
+SYM_CODE_END(debug)

/*
* NMI is doubly nasty. It can happen on the first instruction of
@@ -1512,7 +1512,7 @@ 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
@@ -1577,9 +1577,9 @@ 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

@@ -1590,22 +1590,22 @@ 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_read_cr2
-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

@@ -1614,4 +1614,4 @@ 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 a43ed4c..b4f495b 100644
--- a/arch/x86/kernel/ftrace_32.S
+++ b/arch/x86/kernel/ftrace_32.S
@@ -25,7 +25,7 @@ SYM_FUNC_START(function_hook)
ret
SYM_FUNC_END(function_hook)

-ENTRY(ftrace_caller)
+SYM_CODE_START(ftrace_caller)

#ifdef CONFIG_FRAME_POINTER
/*
@@ -87,7 +87,7 @@ 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)
/*
@@ -166,7 +166,7 @@ SYM_INNER_LABEL(ftrace_regs_call, SYM_L_GLOBAL)
SYM_CODE_END(ftrace_regs_caller)

#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-ENTRY(ftrace_graph_caller)
+SYM_CODE_START(ftrace_graph_caller)
pushl %eax
pushl %ecx
pushl %edx
@@ -180,7 +180,7 @@ 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 19f3d79..5ffcf72 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -129,11 +129,13 @@
SYM_FUNC_START_WEAK(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)