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GCC plugins updates for v5.9-rc1

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- Update URLs for HTTPS scheme where available (Alexander A. Klimov)
 - Improve STACKLEAK code generation on x86 (Alexander Popov)
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Merge tag 'gcc-plugins-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull gcc plugin updates from Kees Cook:
 "Primarily improvements to STACKLEAK from Alexander Popov, along with
  some additional cleanups.

    - Update URLs for HTTPS scheme where available (Alexander A. Klimov)

   - Improve STACKLEAK code generation on x86 (Alexander Popov)"

* tag 'gcc-plugins-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  gcc-plugins: Replace HTTP links with HTTPS ones
  gcc-plugins/stackleak: Add 'verbose' plugin parameter
  gcc-plugins/stackleak: Use asm instrumentation to avoid useless register saving
  ARM: vdso: Don't use gcc plugins for building vgettimeofday.c
  gcc-plugins/stackleak: Don't instrument itself
This commit is contained in:
Linus Torvalds 2020-08-04 13:26:06 -07:00
commit 3e4a12a1ba
9 changed files with 241 additions and 47 deletions
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13
include/linux/compiler_attributes.h
View file

@ -37,6 +37,7 @@
# define __GCC4_has_attribute___copy__ 0
# define __GCC4_has_attribute___designated_init__ 0
# define __GCC4_has_attribute___externally_visible__ 1
# define __GCC4_has_attribute___no_caller_saved_registers__ 0
# define __GCC4_has_attribute___noclone__ 1
# define __GCC4_has_attribute___nonstring__ 0
# define __GCC4_has_attribute___no_sanitize_address__ (__GNUC_MINOR__ >= 8)
@ -176,6 +177,18 @@
*/
#define __mode(x) __attribute__((__mode__(x)))
/*
* Optional: only supported since gcc >= 7
*
* gcc: https://gcc.gnu.org/onlinedocs/gcc/x86-Function-Attributes.html#index-no_005fcaller_005fsaved_005fregisters-function-attribute_002c-x86
* clang: https://clang.llvm.org/docs/AttributeReference.html#no-caller-saved-registers
*/
#if __has_attribute(__no_caller_saved_registers__)
# define __no_caller_saved_registers __attribute__((__no_caller_saved_registers__))
#else
# define __no_caller_saved_registers
#endif
/*
* Optional: not supported by clang
*