mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
![Sami Tolvanen](/assets/img/avatar_default.png)
Switch from Clang's original forward-edge control-flow integrity implementation to -fsanitize=kcfi, which is better suited for the kernel, as it doesn't require LTO, doesn't use a jump table that requires altering function references, and won't break cross-module function address equality. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Kees Cook <keescook@chromium.org> Tested-by: Nathan Chancellor <nathan@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220908215504.3686827-6-samitolvanen@google.com
54 lines
1.3 KiB
ArmAsm
54 lines
1.3 KiB
ArmAsm
/*
|
|
* Common module linker script, always used when linking a module.
|
|
* Archs are free to supply their own linker scripts. ld will
|
|
* combine them automatically.
|
|
*/
|
|
SECTIONS {
|
|
/DISCARD/ : {
|
|
*(.discard)
|
|
*(.discard.*)
|
|
}
|
|
|
|
__ksymtab 0 : { *(SORT(___ksymtab+*)) }
|
|
__ksymtab_gpl 0 : { *(SORT(___ksymtab_gpl+*)) }
|
|
__kcrctab 0 : { *(SORT(___kcrctab+*)) }
|
|
__kcrctab_gpl 0 : { *(SORT(___kcrctab_gpl+*)) }
|
|
|
|
.ctors 0 : ALIGN(8) { *(SORT(.ctors.*)) *(.ctors) }
|
|
.init_array 0 : ALIGN(8) { *(SORT(.init_array.*)) *(.init_array) }
|
|
|
|
.altinstructions 0 : ALIGN(8) { KEEP(*(.altinstructions)) }
|
|
__bug_table 0 : ALIGN(8) { KEEP(*(__bug_table)) }
|
|
__jump_table 0 : ALIGN(8) { KEEP(*(__jump_table)) }
|
|
|
|
__patchable_function_entries : { *(__patchable_function_entries) }
|
|
|
|
#ifdef CONFIG_ARCH_USES_CFI_TRAPS
|
|
__kcfi_traps : { KEEP(*(.kcfi_traps)) }
|
|
#endif
|
|
|
|
#ifdef CONFIG_LTO_CLANG
|
|
/*
|
|
* With CONFIG_LTO_CLANG, LLD always enables -fdata-sections and
|
|
* -ffunction-sections, which increases the size of the final module.
|
|
* Merge the split sections in the final binary.
|
|
*/
|
|
.bss : {
|
|
*(.bss .bss.[0-9a-zA-Z_]*)
|
|
*(.bss..L*)
|
|
}
|
|
|
|
.data : {
|
|
*(.data .data.[0-9a-zA-Z_]*)
|
|
*(.data..L*)
|
|
}
|
|
|
|
.rodata : {
|
|
*(.rodata .rodata.[0-9a-zA-Z_]*)
|
|
*(.rodata..L*)
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* bring in arch-specific sections */
|
|
#include <asm/module.lds.h>
|