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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar: "Misc cleanups and small enhancements all around the map" * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/boot/compressed: Fix debug_puthex() parameter type x86/setup: Fix static memory detection x86/vmlinux: Drop unneeded linker script discard of .eh_frame x86/*/Makefile: Use -fno-asynchronous-unwind-tables to suppress .eh_frame sections x86/boot/compressed: Remove .eh_frame section from bzImage x86/boot/compressed/64: Remove .bss/.pgtable from bzImage x86/boot/compressed/64: Use 32-bit (zero-extended) MOV for z_output_len x86/boot/compressed/64: Use LEA to initialize boot stack pointer
This commit is contained in:
commit
9589351ccf
12 changed files with 32 additions and 14 deletions
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@ -68,6 +68,7 @@ clean-files += cpustr.h
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KBUILD_CFLAGS := $(REALMODE_CFLAGS) -D_SETUP
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KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
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KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
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GCOV_PROFILE := n
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UBSAN_SANITIZE := n
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@ -39,6 +39,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
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KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
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KBUILD_CFLAGS += -Wno-pointer-sign
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KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
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KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
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GCOV_PROFILE := n
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@ -529,7 +529,7 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated)
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leaq input_data(%rip), %rdx /* input_data */
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movl $z_input_len, %ecx /* input_len */
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movq %rbp, %r8 /* output target address */
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movq $z_output_len, %r9 /* decompressed length, end of relocs */
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movl $z_output_len, %r9d /* decompressed length, end of relocs */
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call extract_kernel /* returns kernel location in %rax */
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popq %rsi
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@ -780,7 +780,7 @@ SYM_DATA_END_LABEL(boot_stack, SYM_L_LOCAL, boot_stack_end)
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/*
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* Space for page tables (not in .bss so not zeroed)
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*/
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.section ".pgtable","a",@nobits
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.section ".pgtable","aw",@nobits
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.balign 4096
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SYM_DATA_LOCAL(pgtable, .fill BOOT_PGT_SIZE, 1, 0)
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@ -59,7 +59,7 @@ void __puthex(unsigned long value);
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static inline void debug_putstr(const char *s)
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{ }
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static inline void debug_puthex(const char *s)
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static inline void debug_puthex(unsigned long value)
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{ }
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#define debug_putaddr(x) /* */
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@ -52,7 +52,6 @@ SECTIONS
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_end = .;
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/DISCARD/ : {
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*(.eh_frame)
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*(.note*)
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}
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@ -42,8 +42,8 @@
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* Emit CFI data in .debug_frame sections, not .eh_frame sections.
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* The latter we currently just discard since we don't do DWARF
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* unwinding at runtime. So only the offline DWARF information is
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* useful to anyone. Note we should not use this directive if
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* vmlinux.lds.S gets changed so it doesn't discard .eh_frame.
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* useful to anyone. Note we should not use this directive if we
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* ever decide to enable DWARF unwinding at runtime.
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*/
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.cfi_sections .debug_frame
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#else
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@ -2,6 +2,8 @@
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#ifndef _ASM_X86_SECTIONS_H
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#define _ASM_X86_SECTIONS_H
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#define arch_is_kernel_initmem_freed arch_is_kernel_initmem_freed
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#include <asm-generic/sections.h>
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#include <asm/extable.h>
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@ -14,4 +16,22 @@ extern char __end_rodata_hpage_align[];
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extern char __end_of_kernel_reserve[];
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extern unsigned long _brk_start, _brk_end;
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static inline bool arch_is_kernel_initmem_freed(unsigned long addr)
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{
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/*
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* If _brk_start has not been cleared, brk allocation is incomplete,
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* and we can not make assumptions about its use.
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*/
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if (_brk_start)
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return 0;
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/*
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* After brk allocation is complete, space between _brk_end and _end
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* is available for allocation.
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*/
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return addr >= _brk_end && addr < (unsigned long)&_end;
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}
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#endif /* _ASM_X86_SECTIONS_H */
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@ -64,7 +64,6 @@ RESERVE_BRK(dmi_alloc, 65536);
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* at link time, with RESERVE_BRK*() facility reserving additional
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* chunks.
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*/
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static __initdata
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unsigned long _brk_start = (unsigned long)__brk_base;
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unsigned long _brk_end = (unsigned long)__brk_base;
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@ -313,8 +313,8 @@ SECTIONS
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. = ALIGN(8);
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/*
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* .exit.text is discard at runtime, not link time, to deal with
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* references from .altinstructions and .eh_frame
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* .exit.text is discarded at runtime, not link time, to deal with
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* references from .altinstructions
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*/
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.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
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EXIT_TEXT
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@ -412,9 +412,6 @@ SECTIONS
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DWARF_DEBUG
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DISCARDS
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/DISCARD/ : {
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*(.eh_frame)
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}
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}
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@ -71,5 +71,6 @@ $(obj)/realmode.relocs: $(obj)/realmode.elf FORCE
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KBUILD_CFLAGS := $(REALMODE_CFLAGS) -D_SETUP -D_WAKEUP \
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-I$(srctree)/arch/x86/boot
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KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
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GCOV_PROFILE := n
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UBSAN_SANITIZE := n
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@ -71,7 +71,6 @@ SECTIONS
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/DISCARD/ : {
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*(.note*)
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*(.debug*)
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*(.eh_frame*)
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}
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#include "pasyms.h"
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@ -12,7 +12,8 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \
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-mno-mmx -mno-sse -fshort-wchar \
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-Wno-pointer-sign \
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$(call cc-disable-warning, address-of-packed-member) \
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$(call cc-disable-warning, gnu)
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$(call cc-disable-warning, gnu) \
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-fno-asynchronous-unwind-tables
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# arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly
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# disable the stackleak plugin
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