Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 asm updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Cross-arch changes to move the linker sections for NOTES and
     EXCEPTION_TABLE into the RO_DATA area, where they belong on most
     architectures. (Kees Cook)

   - Switch the x86 linker fill byte from x90 (NOP) to 0xcc (INT3), to
     trap jumps into the middle of those padding areas instead of
     sliding execution. (Kees Cook)

   - A thorough cleanup of symbol definitions within x86 assembler code.
     The rather randomly named macros got streamlined around a
     (hopefully) straightforward naming scheme:

        SYM_START(name, linkage, align...)
        SYM_END(name, sym_type)

        SYM_FUNC_START(name)
        SYM_FUNC_END(name)

        SYM_CODE_START(name)
        SYM_CODE_END(name)

        SYM_DATA_START(name)
        SYM_DATA_END(name)

     etc - with about three times of these basic primitives with some
     label, local symbol or attribute variant, expressed via postfixes.

     No change in functionality intended. (Jiri Slaby)

   - Misc other changes, cleanups and smaller fixes"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits)
  x86/entry/64: Remove pointless jump in paranoid_exit
  x86/entry/32: Remove unused resume_userspace label
  x86/build/vdso: Remove meaningless CFLAGS_REMOVE_*.o
  m68k: Convert missed RODATA to RO_DATA
  x86/vmlinux: Use INT3 instead of NOP for linker fill bytes
  x86/mm: Report actual image regions in /proc/iomem
  x86/mm: Report which part of kernel image is freed
  x86/mm: Remove redundant address-of operators on addresses
  xtensa: Move EXCEPTION_TABLE to RO_DATA segment
  powerpc: Move EXCEPTION_TABLE to RO_DATA segment
  parisc: Move EXCEPTION_TABLE to RO_DATA segment
  microblaze: Move EXCEPTION_TABLE to RO_DATA segment
  ia64: Move EXCEPTION_TABLE to RO_DATA segment
  h8300: Move EXCEPTION_TABLE to RO_DATA segment
  c6x: Move EXCEPTION_TABLE to RO_DATA segment
  arm64: Move EXCEPTION_TABLE to RO_DATA segment
  alpha: Move EXCEPTION_TABLE to RO_DATA segment
  x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment
  x86/vmlinux: Actually use _etext for the end of the text segment
  vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA
  ...

5 files changed, 23 insertions, 22 deletions

diff --git a/arch/x86/platform/efi/efi_stub_32.S b/arch/x86/platform/efi/efi_stub_32.S
index ab2e91e76894..eed8b5b441f8 100644
--- a/arch/x86/platform/efi/efi_stub_32.S
+++ b/arch/x86/platform/efi/efi_stub_32.S
@@ -22,7 +22,7 @@
  */
 
 .text
-ENTRY(efi_call_phys)
+SYM_FUNC_START(efi_call_phys)
 	/*
 	 * 0. The function can only be called in Linux kernel. So CS has been
 	 * set to 0x0010, DS and SS have been set to 0x0018. In EFI, I found
@@ -114,7 +114,7 @@ ENTRY(efi_call_phys)
 	movl	(%edx), %ecx
 	pushl	%ecx
 	ret
-ENDPROC(efi_call_phys)
+SYM_FUNC_END(efi_call_phys)
 .previous
 
 .data
diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S
index 74628ec78f29..b1d2313fe3bf 100644
--- a/arch/x86/platform/efi/efi_stub_64.S
+++ b/arch/x86/platform/efi/efi_stub_64.S
@@ -39,7 +39,7 @@
 	mov %rsi, %cr0;			\
 	mov (%rsp), %rsp
 
-ENTRY(efi_call)
+SYM_FUNC_START(efi_call)
 	pushq %rbp
 	movq %rsp, %rbp
 	SAVE_XMM
@@ -55,4 +55,4 @@ ENTRY(efi_call)
 	RESTORE_XMM
 	popq %rbp
 	ret
-ENDPROC(efi_call)
+SYM_FUNC_END(efi_call)
diff --git a/arch/x86/platform/efi/efi_thunk_64.S b/arch/x86/platform/efi/efi_thunk_64.S
index 46c58b08739c..3189f1394701 100644
--- a/arch/x86/platform/efi/efi_thunk_64.S
+++ b/arch/x86/platform/efi/efi_thunk_64.S
@@ -25,7 +25,7 @@
 
 	.text
 	.code64
-ENTRY(efi64_thunk)
+SYM_FUNC_START(efi64_thunk)
 	push	%rbp
 	push	%rbx
 
@@ -60,14 +60,14 @@ ENTRY(efi64_thunk)
 	pop	%rbx
 	pop	%rbp
 	retq
-ENDPROC(efi64_thunk)
+SYM_FUNC_END(efi64_thunk)
 
 /*
  * We run this function from the 1:1 mapping.
  *
  * This function must be invoked with a 1:1 mapped stack.
  */
-ENTRY(__efi64_thunk)
+SYM_FUNC_START_LOCAL(__efi64_thunk)
 	movl	%ds, %eax
 	push	%rax
 	movl	%es, %eax
@@ -114,14 +114,14 @@ ENTRY(__efi64_thunk)
 	or	%rcx, %rax
 1:
 	ret
-ENDPROC(__efi64_thunk)
+SYM_FUNC_END(__efi64_thunk)
 
-ENTRY(efi_exit32)
+SYM_FUNC_START_LOCAL(efi_exit32)
 	movq	func_rt_ptr(%rip), %rax
 	push	%rax
 	mov	%rdi, %rax
 	ret
-ENDPROC(efi_exit32)
+SYM_FUNC_END(efi_exit32)
 
 	.code32
 /*
@@ -129,7 +129,7 @@ ENDPROC(efi_exit32)
  *
  * The stack should represent the 32-bit calling convention.
  */
-ENTRY(efi_enter32)
+SYM_FUNC_START_LOCAL(efi_enter32)
 	movl	$__KERNEL_DS, %eax
 	movl	%eax, %ds
 	movl	%eax, %es
@@ -145,7 +145,7 @@ ENTRY(efi_enter32)
 	pushl	%eax
 
 	lret
-ENDPROC(efi_enter32)
+SYM_FUNC_END(efi_enter32)
 
 	.data
 	.balign	8
diff --git a/arch/x86/platform/olpc/xo1-wakeup.S b/arch/x86/platform/olpc/xo1-wakeup.S
index 5fee3a2c2fd4..75f4faff8468 100644
--- a/arch/x86/platform/olpc/xo1-wakeup.S
+++ b/arch/x86/platform/olpc/xo1-wakeup.S
@@ -90,7 +90,7 @@ restore_registers:
 
 	ret
 
-ENTRY(do_olpc_suspend_lowlevel)
+SYM_CODE_START(do_olpc_suspend_lowlevel)
 	call	save_processor_state
 	call	save_registers
 
@@ -110,6 +110,7 @@ ret_point:
 	call	restore_registers
 	call	restore_processor_state
 	ret
+SYM_CODE_END(do_olpc_suspend_lowlevel)
 
 .data
 saved_gdt:             .long   0,0
diff --git a/arch/x86/platform/pvh/head.S b/arch/x86/platform/pvh/head.S
index 1f8825bbaffb..43b4d864817e 100644
--- a/arch/x86/platform/pvh/head.S
+++ b/arch/x86/platform/pvh/head.S
@@ -50,7 +50,7 @@
 #define PVH_DS_SEL		(PVH_GDT_ENTRY_DS * 8)
 #define PVH_CANARY_SEL		(PVH_GDT_ENTRY_CANARY * 8)
 
-ENTRY(pvh_start_xen)
+SYM_CODE_START_LOCAL(pvh_start_xen)
 	cld
 
 	lgdt (_pa(gdt))
@@ -146,15 +146,16 @@ ENTRY(pvh_start_xen)
 
 	ljmp $PVH_CS_SEL, $_pa(startup_32)
 #endif
-END(pvh_start_xen)
+SYM_CODE_END(pvh_start_xen)
 
 	.section ".init.data","aw"
 	.balign 8
-gdt:
+SYM_DATA_START_LOCAL(gdt)
 	.word gdt_end - gdt_start
 	.long _pa(gdt_start)
 	.word 0
-gdt_start:
+SYM_DATA_END(gdt)
+SYM_DATA_START_LOCAL(gdt_start)
 	.quad 0x0000000000000000            /* NULL descriptor */
 #ifdef CONFIG_X86_64
 	.quad GDT_ENTRY(0xa09a, 0, 0xfffff) /* PVH_CS_SEL */
@@ -163,15 +164,14 @@ gdt_start:
 #endif
 	.quad GDT_ENTRY(0xc092, 0, 0xfffff) /* PVH_DS_SEL */
 	.quad GDT_ENTRY(0x4090, 0, 0x18)    /* PVH_CANARY_SEL */
-gdt_end:
+SYM_DATA_END_LABEL(gdt_start, SYM_L_LOCAL, gdt_end)
 
 	.balign 16
-canary:
-	.fill 48, 1, 0
+SYM_DATA_LOCAL(canary, .fill 48, 1, 0)
 
-early_stack:
+SYM_DATA_START_LOCAL(early_stack)
 	.fill BOOT_STACK_SIZE, 1, 0
-early_stack_end:
+SYM_DATA_END_LABEL(early_stack, SYM_L_LOCAL, early_stack_end)
 
 	ELFNOTE(Xen, XEN_ELFNOTE_PHYS32_ENTRY,
 	             _ASM_PTR (pvh_start_xen - __START_KERNEL_map))