[PATCH -resend 15/27] x86: assembly, do not annotate functions by GLOBAL
From: Jiri Slaby <hidden>
Date: 2018-05-10 08:13:14
Also in:
lkml
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
GLOBAL is meant for global symbols, but not functions. Use the new macros SYM_FUNC_START* and SYM_CODE_START* (depending on the type of the function) which are dedicated for global functions. And since they both require a closing by SYM_*_END, we do this here too. startup_64, which does not use GLOBAL, but uses .globl explicitly, is converted too. in_pm32 should not be global at all as it is used only locally, so switch to SYM_FUNC_START_LOCAL_NOALIGN. Besides all of that, x86's custom GLOBAL macro is going to die very soon. "No alignments" are preserved. Signed-off-by: Jiri Slaby <redacted> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <redacted> Cc: Ingo Molnar <mingo@redhat.com> Cc: <x86@kernel.org> --- arch/x86/boot/copy.S | 16 ++++++++-------- arch/x86/boot/pmjump.S | 8 ++++---- arch/x86/kernel/head_64.S | 5 +++-- 3 files changed, 15 insertions(+), 14 deletions(-)
diff --git a/arch/x86/boot/copy.S b/arch/x86/boot/copy.S
index 15d9f74b0008..73aa8307a10f 100644
--- a/arch/x86/boot/copy.S
+++ b/arch/x86/boot/copy.S@@ -17,7 +17,7 @@ .code16 .text -GLOBAL(memcpy) +SYM_FUNC_START_NOALIGN(memcpy) pushw %si pushw %di movw %ax, %di
@@ -31,9 +31,9 @@ GLOBAL(memcpy) popw %di popw %si retl -ENDPROC(memcpy) +SYM_FUNC_END(memcpy) -GLOBAL(memset) +SYM_FUNC_START_NOALIGN(memset) pushw %di movw %ax, %di movzbl %dl, %eax
@@ -46,22 +46,22 @@ GLOBAL(memset) rep; stosb popw %di retl -ENDPROC(memset) +SYM_FUNC_END(memset) -GLOBAL(copy_from_fs) +SYM_FUNC_START_NOALIGN(copy_from_fs) pushw %ds pushw %fs popw %ds calll memcpy popw %ds retl -ENDPROC(copy_from_fs) +SYM_FUNC_END(copy_from_fs) -GLOBAL(copy_to_fs) +SYM_FUNC_START_NOALIGN(copy_to_fs) pushw %es pushw %fs popw %es calll memcpy popw %es retl -ENDPROC(copy_to_fs) +SYM_FUNC_END(copy_to_fs)
diff --git a/arch/x86/boot/pmjump.S b/arch/x86/boot/pmjump.S
index 3e0edc6d2a20..b90e42eb1a62 100644
--- a/arch/x86/boot/pmjump.S
+++ b/arch/x86/boot/pmjump.S@@ -23,7 +23,7 @@ /* * void protected_mode_jump(u32 entrypoint, u32 bootparams); */ -GLOBAL(protected_mode_jump) +SYM_FUNC_START_NOALIGN(protected_mode_jump) movl %edx, %esi # Pointer to boot_params table xorl %ebx, %ebx
@@ -44,11 +44,11 @@ GLOBAL(protected_mode_jump) .byte 0x66, 0xea # ljmpl opcode 2: .long in_pm32 # offset .word __BOOT_CS # segment -ENDPROC(protected_mode_jump) +SYM_FUNC_END(protected_mode_jump) .code32 .section ".text32","ax" -GLOBAL(in_pm32) +SYM_FUNC_START_LOCAL_NOALIGN(in_pm32) # Set up data segments for flat 32-bit mode movl %ecx, %ds movl %ecx, %es
@@ -74,4 +74,4 @@ GLOBAL(in_pm32) lldt %cx jmpl *%eax # Jump to the 32-bit entrypoint -ENDPROC(in_pm32) +SYM_FUNC_END(in_pm32)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 80b620c824eb..48e71043b99c 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S@@ -50,8 +50,7 @@ L3_START_KERNEL = pud_index(__START_KERNEL_map) .text __HEAD .code64 - .globl startup_64 -startup_64: +SYM_CODE_START_NOALIGN(startup_64) UNWIND_HINT_EMPTY /* * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
@@ -91,6 +90,8 @@ startup_64: /* Form the CR3 value being sure to include the CR3 modifier */ addq $(early_top_pgt - __START_KERNEL_map), %rax jmp 1f +SYM_CODE_END(startup_64) + ENTRY(secondary_startup_64) UNWIND_HINT_EMPTY /*
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2.16.3