[PATCH v8 23/28] x86_64/asm: change all ENTRY+END to SYM_CODE_*

From: Jiri Slaby
Date: Thu Aug 08 2019 - 06:39:19 EST

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.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> [xen bits]
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
---
arch/x86/entry/entry_64.S | 52 ++++++++++++++++----------------
arch/x86/entry/entry_64_compat.S | 8 ++---
arch/x86/kernel/ftrace_64.S | 4 +--
arch/x86/kernel/head_64.S | 12 ++++----
arch/x86/xen/xen-asm_64.S | 8 ++---
arch/x86/xen/xen-head.S | 8 ++---
6 files changed, 46 insertions(+), 46 deletions(-)

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 6d6cb84952ff..bd04476d432d 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -46,11 +46,11 @@
.section .entry.text, "ax"

#ifdef CONFIG_PARAVIRT
-ENTRY(native_usergs_sysret64)
+SYM_CODE_START(native_usergs_sysret64)
UNWIND_HINT_EMPTY
swapgs
sysretq
-END(native_usergs_sysret64)
+SYM_CODE_END(native_usergs_sysret64)
#endif /* CONFIG_PARAVIRT */

.macro TRACE_IRQS_FLAGS flags:req
@@ -142,7 +142,7 @@ END(native_usergs_sysret64)
* with them due to bugs in both AMD and Intel CPUs.
*/

-ENTRY(entry_SYSCALL_64)
+SYM_CODE_START(entry_SYSCALL_64)
UNWIND_HINT_EMPTY
/*
* Interrupts are off on entry.
@@ -273,13 +273,13 @@ syscall_return_via_sysret:
popq %rdi
popq %rsp
USERGS_SYSRET64
-END(entry_SYSCALL_64)
+SYM_CODE_END(entry_SYSCALL_64)

/*
* %rdi: prev task
* %rsi: next task
*/
-ENTRY(__switch_to_asm)
+SYM_CODE_START(__switch_to_asm)
UNWIND_HINT_FUNC
/*
* Save callee-saved registers
@@ -321,7 +321,7 @@ ENTRY(__switch_to_asm)
popq %rbp

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

/*
* A newly forked process directly context switches into this address.
@@ -330,7 +330,7 @@ END(__switch_to_asm)
* rbx: kernel thread func (NULL for user thread)
* r12: kernel thread arg
*/
-ENTRY(ret_from_fork)
+SYM_CODE_START(ret_from_fork)
UNWIND_HINT_EMPTY
movq %rax, %rdi
call schedule_tail /* rdi: 'prev' task parameter */
@@ -357,14 +357,14 @@ ENTRY(ret_from_fork)
*/
movq $0, RAX(%rsp)
jmp 2b
-END(ret_from_fork)
+SYM_CODE_END(ret_from_fork)

/*
* Build the entry stubs with some assembler magic.
* 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)
UNWIND_HINT_IRET_REGS
@@ -373,10 +373,10 @@ ENTRY(irq_entries_start)
.align 8
vector=vector+1
.endr
-END(irq_entries_start)
+SYM_CODE_END(irq_entries_start)

.align 8
-ENTRY(spurious_entries_start)
+SYM_CODE_START(spurious_entries_start)
vector=FIRST_SYSTEM_VECTOR
.rept (NR_VECTORS - FIRST_SYSTEM_VECTOR)
UNWIND_HINT_IRET_REGS
@@ -385,7 +385,7 @@ ENTRY(spurious_entries_start)
.align 8
vector=vector+1
.endr
-END(spurious_entries_start)
+SYM_CODE_END(spurious_entries_start)

.macro DEBUG_ENTRY_ASSERT_IRQS_OFF
#ifdef CONFIG_DEBUG_ENTRY
@@ -511,7 +511,7 @@ END(spurious_entries_start)
* | return address |
* +----------------------------------------------------+
*/
-ENTRY(interrupt_entry)
+SYM_CODE_START(interrupt_entry)
UNWIND_HINT_FUNC
ASM_CLAC
cld
@@ -577,7 +577,7 @@ ENTRY(interrupt_entry)
TRACE_IRQS_OFF

ret
-END(interrupt_entry)
+SYM_CODE_END(interrupt_entry)
_ASM_NOKPROBE(interrupt_entry)


@@ -793,7 +793,7 @@ _ASM_NOKPROBE(common_interrupt)
* APIC interrupts.
*/
.macro apicinterrupt3 num sym do_sym
-ENTRY(\sym)
+SYM_CODE_START(\sym)
UNWIND_HINT_IRET_REGS
pushq $~(\num)
.Lcommon_\sym:
@@ -801,7 +801,7 @@ ENTRY(\sym)
UNWIND_HINT_REGS indirect=1
call \do_sym /* rdi points to pt_regs */
jmp ret_from_intr
-END(\sym)
+SYM_CODE_END(\sym)
_ASM_NOKPROBE(\sym)
.endm

@@ -966,7 +966,7 @@ apicinterrupt IRQ_WORK_VECTOR irq_work_interrupt smp_irq_work_interrupt
* #DF: if the thread stack is somehow unusable, we'll still get a useful OOPS.
*/
.macro idtentry sym do_sym has_error_code:req paranoid=0 shift_ist=-1 ist_offset=0 create_gap=0 read_cr2=0
-ENTRY(\sym)
+SYM_CODE_START(\sym)
UNWIND_HINT_IRET_REGS offset=\has_error_code*8

/* Sanity check */
@@ -1016,7 +1016,7 @@ ENTRY(\sym)
.endif

_ASM_NOKPROBE(\sym)
-END(\sym)
+SYM_CODE_END(\sym)
.endm

idtentry divide_error do_divide_error has_error_code=0
@@ -1133,7 +1133,7 @@ SYM_CODE_END(xen_do_hypervisor_callback)
* We distinguish between categories by comparing each saved segment register
* with its current contents: any discrepancy means we in category 1.
*/
-ENTRY(xen_failsafe_callback)
+SYM_CODE_START(xen_failsafe_callback)
UNWIND_HINT_EMPTY
movl %ds, %ecx
cmpw %cx, 0x10(%rsp)
@@ -1163,7 +1163,7 @@ ENTRY(xen_failsafe_callback)
PUSH_AND_CLEAR_REGS
ENCODE_FRAME_POINTER
jmp error_exit
-END(xen_failsafe_callback)
+SYM_CODE_END(xen_failsafe_callback)
#endif /* CONFIG_XEN_PV */

#ifdef CONFIG_XEN_PVHVM
@@ -1370,7 +1370,7 @@ SYM_CODE_END(error_exit)
* %r14: Used to save/restore the CR3 of the interrupted context
* when PAGE_TABLE_ISOLATION is in use. Do not clobber.
*/
-ENTRY(nmi)
+SYM_CODE_START(nmi)
UNWIND_HINT_IRET_REGS

/*
@@ -1704,21 +1704,21 @@ nmi_restore:
* about espfix64 on the way back to kernel mode.
*/
iretq
-END(nmi)
+SYM_CODE_END(nmi)

#ifndef CONFIG_IA32_EMULATION
/*
* This handles SYSCALL from 32-bit code. There is no way to program
* MSRs to fully disable 32-bit SYSCALL.
*/
-ENTRY(ignore_sysret)
+SYM_CODE_START(ignore_sysret)
UNWIND_HINT_EMPTY
mov $-ENOSYS, %eax
sysret
-END(ignore_sysret)
+SYM_CODE_END(ignore_sysret)
#endif

-ENTRY(rewind_stack_do_exit)
+SYM_CODE_START(rewind_stack_do_exit)
UNWIND_HINT_FUNC
/* Prevent any naive code from trying to unwind to our caller. */
xorl %ebp, %ebp
@@ -1728,4 +1728,4 @@ ENTRY(rewind_stack_do_exit)
UNWIND_HINT_FUNC sp_offset=PTREGS_SIZE

call do_exit
-END(rewind_stack_do_exit)
+SYM_CODE_END(rewind_stack_do_exit)
diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S
index 5c7e71669239..da296435676e 100644
--- a/arch/x86/entry/entry_64_compat.S
+++ b/arch/x86/entry/entry_64_compat.S
@@ -196,7 +196,7 @@ ENDPROC(entry_SYSENTER_compat)
* esp user stack
* 0(%esp) arg6
*/
-ENTRY(entry_SYSCALL_compat)
+SYM_CODE_START(entry_SYSCALL_compat)
/* Interrupts are off on entry. */
swapgs

@@ -311,7 +311,7 @@ sysret32_from_system_call:
xorl %r10d, %r10d
swapgs
sysretl
-END(entry_SYSCALL_compat)
+SYM_CODE_END(entry_SYSCALL_compat)

/*
* 32-bit legacy system call entry.
@@ -339,7 +339,7 @@ END(entry_SYSCALL_compat)
* edi arg5
* ebp arg6
*/
-ENTRY(entry_INT80_compat)
+SYM_CODE_START(entry_INT80_compat)
/*
* Interrupts are off on entry.
*/
@@ -416,4 +416,4 @@ ENTRY(entry_INT80_compat)
/* Go back to user mode. */
TRACE_IRQS_ON
jmp swapgs_restore_regs_and_return_to_usermode
-END(entry_INT80_compat)
+SYM_CODE_END(entry_INT80_compat)
diff --git a/arch/x86/kernel/ftrace_64.S b/arch/x86/kernel/ftrace_64.S
index 3afaaf555637..60f894b018e0 100644
--- a/arch/x86/kernel/ftrace_64.S
+++ b/arch/x86/kernel/ftrace_64.S
@@ -296,7 +296,7 @@ ENTRY(ftrace_graph_caller)
retq
ENDPROC(ftrace_graph_caller)

-ENTRY(return_to_handler)
+SYM_CODE_START(return_to_handler)
UNWIND_HINT_EMPTY
subq $24, %rsp

@@ -312,5 +312,5 @@ ENTRY(return_to_handler)
movq (%rsp), %rax
addq $24, %rsp
JMP_NOSPEC %rdi
-END(return_to_handler)
+SYM_CODE_END(return_to_handler)
#endif
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 94d747307c6a..7bee04dd2997 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -91,7 +91,7 @@ SYM_CODE_START_NOALIGN(startup_64)
jmp 1f
SYM_CODE_END(startup_64)

-ENTRY(secondary_startup_64)
+SYM_CODE_START(secondary_startup_64)
UNWIND_HINT_EMPTY
/*
* At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
@@ -241,7 +241,7 @@ ENTRY(secondary_startup_64)
pushq %rax # target address in negative space
lretq
.Lafter_lret:
-END(secondary_startup_64)
+SYM_CODE_END(secondary_startup_64)

#include "verify_cpu.S"

@@ -251,11 +251,11 @@ END(secondary_startup_64)
* up already except stack. We just set up stack here. Then call
* start_secondary() via .Ljump_to_C_code.
*/
-ENTRY(start_cpu0)
+SYM_CODE_START(start_cpu0)
UNWIND_HINT_EMPTY
movq initial_stack(%rip), %rsp
jmp .Ljump_to_C_code
-END(start_cpu0)
+SYM_CODE_END(start_cpu0)
#endif

/* Both SMP bootup and ACPI suspend change these variables */
@@ -272,7 +272,7 @@ SYM_DATA(initial_stack,
__FINITDATA

__INIT
-ENTRY(early_idt_handler_array)
+SYM_CODE_START(early_idt_handler_array)
i = 0
.rept NUM_EXCEPTION_VECTORS
.if ((EXCEPTION_ERRCODE_MASK >> i) & 1) == 0
@@ -288,7 +288,7 @@ ENTRY(early_idt_handler_array)
.fill early_idt_handler_array + i*EARLY_IDT_HANDLER_SIZE - ., 1, 0xcc
.endr
UNWIND_HINT_IRET_REGS offset=16
-END(early_idt_handler_array)
+SYM_CODE_END(early_idt_handler_array)

SYM_CODE_START_LOCAL(early_idt_handler_common)
/*
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S
index c209c70fc5e4..0060120f51dd 100644
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -20,11 +20,11 @@
#include <linux/linkage.h>

.macro xen_pv_trap name
-ENTRY(xen_\name)
+SYM_CODE_START(xen_\name)
pop %rcx
pop %r11
jmp \name
-END(xen_\name)
+SYM_CODE_END(xen_\name)
_ASM_NOKPROBE(xen_\name)
.endm

@@ -57,7 +57,7 @@ xen_pv_trap entry_INT80_compat
xen_pv_trap hypervisor_callback

__INIT
-ENTRY(xen_early_idt_handler_array)
+SYM_CODE_START(xen_early_idt_handler_array)
i = 0
.rept NUM_EXCEPTION_VECTORS
pop %rcx
@@ -66,7 +66,7 @@ ENTRY(xen_early_idt_handler_array)
i = i + 1
.fill xen_early_idt_handler_array + i*XEN_EARLY_IDT_HANDLER_SIZE - ., 1, 0xcc
.endr
-END(xen_early_idt_handler_array)
+SYM_CODE_END(xen_early_idt_handler_array)
__FINIT

hypercall_iret = hypercall_page + __HYPERVISOR_iret * 32
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index c1d8b90aa4e2..1d0cee3163e4 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -22,7 +22,7 @@

#ifdef CONFIG_XEN_PV
__INIT
-ENTRY(startup_xen)
+SYM_CODE_START(startup_xen)
UNWIND_HINT_EMPTY
cld

@@ -52,13 +52,13 @@ ENTRY(startup_xen)
#endif

jmp xen_start_kernel
-END(startup_xen)
+SYM_CODE_END(startup_xen)
__FINIT
#endif

.pushsection .text
.balign PAGE_SIZE
-ENTRY(hypercall_page)
+SYM_CODE_START(hypercall_page)
.rept (PAGE_SIZE / 32)
UNWIND_HINT_EMPTY
.skip 32
@@ -69,7 +69,7 @@ ENTRY(hypercall_page)
.type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32
#include <asm/xen-hypercalls.h>
#undef HYPERCALL
-END(hypercall_page)
+SYM_CODE_END(hypercall_page)
.popsection

ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux")
--
2.22.0