Starting from binutils commit bd7ab16b4537788ad53521c45469a1bdae84ad4a:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=bd7ab16b4537788ad53521c45469a1bdae84ad4a
x86-64 assembler generates R_X86_64_PLT32, instead of R_X86_64_PC32, for
32-bit PC-relative branches. Grub2 should treat R_X86_64_PLT32 as
R_X86_64_PC32.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
(cherry picked from commit 842c390469)
* configure.ac: Remove -m64 from checks for -mcmodel=large and
-mno-red-zone. These are always either unnecessary (x86_64-emu) or
already in TARGET_CFLAGS at this point, and they produce incorrect
results when building for x32.
* grub-core/kern/x86_64/dl.c (grub_arch_dl_relocate_symbols): Cast
pointers to Elf64_Xword via grub_addr_t, in order to work on x32.
* include/grub/x86_64/types.h (GRUB_TARGET_SIZEOF_VOID_P,
GRUB_TARGET_SIZEOF_LONG): Define to 4 on x32.
Previously we misaligned stack by 8 in startup.S and compensated
for it in callwrap.S. According to ABI docs (EFI and sysv amd64)
right behaviour is to align stack in startup.S and keep it aligned
in callwrap.S. startup.S part was committed few commits before. This
takes care of callwrap.S.
Reported by: Gary Lin.
16-byte boundary, as required by the x86-64 ABI, before calling
grub_main. In some cases, GCC emits code that assumes this
alignment, which crashes if not aligned. The EFI firmware is also
entitled to assume that stack alignment without checking.
done with a dedicated section.
* grub-core/boot/sparc64/ieee1275/boot.S: Remove GRUB_BOOT_VERSION.
Ensure the correct position of boot_path.
* grub-core/kern/i386/efi/startup.S: Remove GRUB_BOOT_VERSION.
* grub-core/kern/i386/pc/startup.S: Likewise. Ensure correct position of
other fields.
* grub-core/kern/x86_64/efi/startup.S: Remove GRUB_BOOT_VERSION.
* include/grub/boot.h: Removed. All references removed.
* include/grub/sparc64/ieee1275/boot.h (GRUB_BOOT_MACHINE_VER_MAJ):
Removed.
(GRUB_BOOT_MACHINE_BOOT_DEVPATH): Make it lower.
