[PATCH v5 24/27] x86_32: assembly, add ENDs to some functions and relabel with SYM_CODE_*

From: Jiri Slaby
Date: Thu Nov 30 2017 - 09:51:07 EST

All these are functions which are invoked from elsewhere, but they are
not typical C functions. So we annotate them (as global) using the new
SYM_CODE_START. All these were not balanced with any END, so mark their
ends by SYM_CODE_END, appropriatelly.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> [xen bits]
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> [hibernate]
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
---
arch/x86/entry/entry_32.S | 3 ++-
arch/x86/kernel/acpi/wakeup_32.S | 7 ++++---
arch/x86/kernel/ftrace_32.S | 3 ++-
arch/x86/kernel/head_32.S | 3 ++-
arch/x86/power/hibernate_asm_32.S | 6 ++++--
arch/x86/realmode/rm/trampoline_32.S | 6 ++++--
arch/x86/xen/xen-asm_32.S | 7 ++++---
7 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 4cef47b8027f..f705f082b3c6 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -361,9 +361,10 @@ SYM_ENTRY(__begin_SYSENTER_singlestep_region, SYM_L_GLOBAL, SYM_A_NONE)
* Xen doesn't set %esp to be precisely what the normal SYSENTER
* entry point expects, so fix it up before using the normal path.
*/
-ENTRY(xen_sysenter_target)
+SYM_CODE_START(xen_sysenter_target)
addl $5*4, %esp /* remove xen-provided frame */
jmp .Lsysenter_past_esp
+SYM_CODE_END(xen_sysenter_target)
#endif

/*
diff --git a/arch/x86/kernel/acpi/wakeup_32.S b/arch/x86/kernel/acpi/wakeup_32.S
index feac1e5ecba0..71a05a6cc36a 100644
--- a/arch/x86/kernel/acpi/wakeup_32.S
+++ b/arch/x86/kernel/acpi/wakeup_32.S
@@ -8,8 +8,7 @@
.code32
ALIGN

-ENTRY(wakeup_pmode_return)
-wakeup_pmode_return:
+SYM_CODE_START(wakeup_pmode_return)
movw $__KERNEL_DS, %ax
movw %ax, %ss
movw %ax, %fs
@@ -38,6 +37,7 @@ wakeup_pmode_return:
# jump to place where we left off
movl saved_eip, %eax
jmp *%eax
+SYM_CODE_END(wakeup_pmode_return)

bogus_magic:
jmp bogus_magic
@@ -71,7 +71,7 @@ restore_registers:
popfl
ret

-ENTRY(do_suspend_lowlevel)
+SYM_CODE_START(do_suspend_lowlevel)
call save_processor_state
call save_registers
pushl $3
@@ -86,6 +86,7 @@ ret_point:
call restore_registers
call restore_processor_state
ret
+SYM_CODE_END(do_suspend_lowlevel)

.data
ALIGN
diff --git a/arch/x86/kernel/ftrace_32.S b/arch/x86/kernel/ftrace_32.S
index b9253728defd..5785a289a8ac 100644
--- a/arch/x86/kernel/ftrace_32.S
+++ b/arch/x86/kernel/ftrace_32.S
@@ -101,7 +101,7 @@ WEAK(ftrace_stub)
ret
END(ftrace_caller)

-ENTRY(ftrace_regs_caller)
+SYM_CODE_START(ftrace_regs_caller)
/*
* i386 does not save SS and ESP when coming from kernel.
* Instead, to get sp, &regs->sp is used (see ptrace.h).
@@ -169,6 +169,7 @@ SYM_CODE_INNER_LABEL(ftrace_regs_call, SYM_L_GLOBAL)
lea 3*4(%esp), %esp /* Skip orig_ax, ip and cs */

jmp .Lftrace_ret
+SYM_CODE_END(ftrace_regs_caller)
#else /* ! CONFIG_DYNAMIC_FTRACE */

ENTRY(function_hook)
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index a2bc3e35c2c6..0cf8ed275272 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -64,7 +64,7 @@ RESERVE_BRK(pagetables, INIT_MAP_SIZE)
* can.
*/
__HEAD
-ENTRY(startup_32)
+SYM_CODE_START(startup_32)
movl pa(initial_stack),%ecx

/* test KEEP_SEGMENTS flag to see if the bootloader is asking
@@ -172,6 +172,7 @@ num_subarch_entries = (. - subarch_entries) / 4
#else
jmp .Ldefault_entry
#endif /* CONFIG_PARAVIRT */
+SYM_CODE_END(startup_32)

#ifdef CONFIG_HOTPLUG_CPU
/*
diff --git a/arch/x86/power/hibernate_asm_32.S b/arch/x86/power/hibernate_asm_32.S
index 6e56815e13a0..3cd15e34aa87 100644
--- a/arch/x86/power/hibernate_asm_32.S
+++ b/arch/x86/power/hibernate_asm_32.S
@@ -15,7 +15,7 @@

.text

-ENTRY(swsusp_arch_suspend)
+SYM_CODE_START(swsusp_arch_suspend)
movl %esp, saved_context_esp
movl %ebx, saved_context_ebx
movl %ebp, saved_context_ebp
@@ -26,8 +26,9 @@ ENTRY(swsusp_arch_suspend)

call swsusp_save
ret
+SYM_CODE_END(swsusp_arch_suspend)

-ENTRY(restore_image)
+SYM_CODE_START(restore_image)
movl mmu_cr4_features, %ecx
movl resume_pg_dir, %eax
subl $__PAGE_OFFSET, %eax
@@ -83,3 +84,4 @@ done:
xorl %eax, %eax

ret
+SYM_CODE_END(restore_image)
diff --git a/arch/x86/realmode/rm/trampoline_32.S b/arch/x86/realmode/rm/trampoline_32.S
index e96efcd60bf7..a3b047a44c5c 100644
--- a/arch/x86/realmode/rm/trampoline_32.S
+++ b/arch/x86/realmode/rm/trampoline_32.S
@@ -29,7 +29,7 @@
.code16

.balign PAGE_SIZE
-ENTRY(trampoline_start)
+SYM_CODE_START(trampoline_start)
wbinvd # Needed for NUMA-Q should be harmless for others

LJMPW_RM(1f)
@@ -57,11 +57,13 @@ ENTRY(trampoline_start)
lmsw %dx # into protected mode

ljmpl $__BOOT_CS, $pa_startup_32
+SYM_CODE_END(trampoline_start)

.section ".text32","ax"
.code32
-ENTRY(startup_32) # note: also used from wakeup_asm.S
+SYM_CODE_START(startup_32) # note: also used from wakeup_asm.S
jmp *%eax
+SYM_CODE_END(startup_32)

.bss
.balign 8
diff --git a/arch/x86/xen/xen-asm_32.S b/arch/x86/xen/xen-asm_32.S
index c15db060a242..8b8f8355b938 100644
--- a/arch/x86/xen/xen-asm_32.S
+++ b/arch/x86/xen/xen-asm_32.S
@@ -56,7 +56,7 @@
_ASM_EXTABLE(1b,2b)
.endm

-ENTRY(xen_iret)
+SYM_CODE_START(xen_iret)
/* test eflags for special cases */
testl $(X86_EFLAGS_VM | XEN_EFLAGS_NMI), 8(%esp)
jnz hyper_iret
@@ -122,6 +122,7 @@ xen_iret_end_crit:
hyper_iret:
/* put this out of line since its very rarely used */
jmp hypercall_page + __HYPERVISOR_iret * 32
+SYM_CODE_END(xen_iret)

.globl xen_iret_start_crit, xen_iret_end_crit

@@ -165,7 +166,7 @@ hyper_iret:
* SAVE_ALL state before going on, since it's usermode state which we
* eventually need to restore.
*/
-ENTRY(xen_iret_crit_fixup)
+SYM_CODE_START(xen_iret_crit_fixup)
/*
* Paranoia: Make sure we're really coming from kernel space.
* One could imagine a case where userspace jumps into the
@@ -204,4 +205,4 @@ ENTRY(xen_iret_crit_fixup)

lea 4(%edi), %esp /* point esp to new frame */
2: jmp xen_do_upcall
-
+SYM_CODE_END(xen_iret_crit_fixup)
--
2.15.0