# git rev-parse -q --verify ffcf9c5700e49c0aee42dcba9a12ba21338e8136^{commit}
ffcf9c5700e49c0aee42dcba9a12ba21338e8136
already have revision, skipping fetch
# git checkout -q -f -B kisskb ffcf9c5700e49c0aee42dcba9a12ba21338e8136
# git clean -qxdf
# < git log -1
# commit ffcf9c5700e49c0aee42dcba9a12ba21338e8136
# Author: Nick Desaulniers <ndesaulniers@google.com>
# Date:   Wed Aug 10 15:24:41 2022 -0700
# 
#     x86: link vdso and boot with -z noexecstack --no-warn-rwx-segments
#     
#     Users of GNU ld (BFD) from binutils 2.39+ will observe multiple
#     instances of a new warning when linking kernels in the form:
#     
#       ld: warning: arch/x86/boot/pmjump.o: missing .note.GNU-stack section implies executable stack
#       ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
#       ld: warning: arch/x86/boot/compressed/vmlinux has a LOAD segment with RWX permissions
#     
#     Generally, we would like to avoid the stack being executable.  Because
#     there could be a need for the stack to be executable, assembler sources
#     have to opt-in to this security feature via explicit creation of the
#     .note.GNU-stack feature (which compilers create by default) or command
#     line flag --noexecstack.  Or we can simply tell the linker the
#     production of such sections is irrelevant and to link the stack as
#     --noexecstack.
#     
#     LLVM's LLD linker defaults to -z noexecstack, so this flag isn't
#     strictly necessary when linking with LLD, only BFD, but it doesn't hurt
#     to be explicit here for all linkers IMO.  --no-warn-rwx-segments is
#     currently BFD specific and only available in the current latest release,
#     so it's wrapped in an ld-option check.
#     
#     While the kernel makes extensive usage of ELF sections, it doesn't use
#     permissions from ELF segments.
#     
#     Link: https://lore.kernel.org/linux-block/3af4127a-f453-4cf7-f133-a181cce06f73@kernel.dk/
#     Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107
#     Link: https://github.com/llvm/llvm-project/issues/57009
#     Reported-and-tested-by: Jens Axboe <axboe@kernel.dk>
#     Suggested-by: Fangrui Song <maskray@google.com>
#     Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-ld --version
# < git log --format=%s --max-count=1 ffcf9c5700e49c0aee42dcba9a12ba21338e8136
# < make -s -j 8 ARCH=sh O=/kisskb/build/linus_sh-allnoconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  allnoconfig
# < make -s -j 8 ARCH=sh O=/kisskb/build/linus_sh-allnoconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  help
# make -s -j 8 ARCH=sh O=/kisskb/build/linus_sh-allnoconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  olddefconfig
# make -s -j 8 ARCH=sh O=/kisskb/build/linus_sh-allnoconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  
  Generating include/generated/machtypes.h
<stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/arch/sh/include/asm/hw_irq.h:6,
                 from /kisskb/src/include/linux/irq.h:596,
                 from /kisskb/src/include/asm-generic/hardirq.h:17,
                 from /kisskb/src/arch/sh/include/asm/hardirq.h:9,
                 from /kisskb/src/include/linux/hardirq.h:11,
                 from /kisskb/src/include/linux/interrupt.h:11,
                 from /kisskb/src/include/linux/serial_core.h:13,
                 from /kisskb/src/include/linux/serial_sci.h:6,
                 from /kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:11:
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:105:31: note: in expansion of macro '_INTC_ARRAY'
  105 |         _INTC_ARRAY(vectors), _INTC_ARRAY(groups),      \
      |                               ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:106:9: note: in expansion of macro '_INTC_ARRAY'
  106 |         _INTC_ARRAY(mask_regs), _INTC_ARRAY(prio_regs), \
      |         ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:107:9: note: in expansion of macro '_INTC_ARRAY'
  107 |         _INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs), \
      |         ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:107:34: note: in expansion of macro '_INTC_ARRAY'
  107 |         _INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs), \
      |                                  ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/machvec.c: In function 'sh_mv_setup':
/kisskb/src/arch/sh/kernel/machvec.c:105:33: warning: array subscript 'struct sh_machine_vector[0]' is partly outside array bounds of 'long int[1]' [-Warray-bounds]
  105 |                         sh_mv = *(struct sh_machine_vector *)&__machvec_start;
      |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/arch/sh/kernel/machvec.c:13:
/kisskb/src/arch/sh/include/asm/sections.h:7:13: note: while referencing '__machvec_start'
    7 | extern long __machvec_start, __machvec_end;
      |             ^~~~~~~~~~~~~~~
  Kernel: arch/sh/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/linus_sh-allnoconfig_sh4-gcc11
# Build took: 0:00:43.850792