libgcc for boot environment isn't always present and compatible.
libgcc is often absent if endianness or bit-size at boot is different
from running OS.
libgcc may use optimised opcodes that aren't available on boot time.
So instead of relying on libgcc shipped with the compiler, supply
the functions in GRUB directly.
Tests are present to ensure that those replacement functions behave the
way compiler expects them to.
* grub-core/kern/dl.c (grub_dl_load_segments) [__powerpc__]: Follow
__ia64__ path.
(grub_dl_load_segments): Set mod->sz.
(grub_dl_flush_cache): Flush whole space occupied by module, not just
segments.
* grub-core/kern/ia64/dl.c (nopm): Make const while on it.
(jump): Likewise.
* grub-core/kern/powerpc/dl.c (grub_arch_dl_get_tramp_got_size): New
function.
(trampoline): New struct.
(trampoline_template): New const.
(grub_arch_dl_relocate_symbols): Create trampolines on overflow.
* include/grub/dl.h (grub_dl): Add sz element.
[__powerpc__]: Follow __ia64__.
(GRUB_ARCH_DL_TRAMP_ALIGN): Define on ppc.
(GRUB_ARCH_DL_GOT_ALIGN): Likewise.
(GRUB_ARCH_DL_TRAMP_SIZE): Likewise.
(grub_arch_dl_get_tramp_got_size) [__powerpc__]: New proto.
* grub-core/boot/i386/pc/lnxboot.S: Use
GRUB_KERNEL_I386_PC_MULTIBOOT_SIGNATURE.
* grub-core/kern/i386/pc/startup.S: Move grub_prefix to compressed part.
* include/grub/offsets.h: Rename GRUB_MACHINE_DATA_END to
GRUB_MACHINE_PREFIX_END. All users updated.
(GRUB_KERNEL_I386_PC_PREFIX): Set to GRUB_KERNEL_I386_PC_RAW_SIZE.
(GRUB_KERNEL_I386_PC_PREFIX_END): Set to GRUB_KERNEL_I386_PC_PREFIX
+ 0x40.
(GRUB_KERNEL_I386_PC_RAW_SIZE): Decrease.
* util/grub-mkimage.c (image_target_desc): Change data_end to
prefix_end. All users updated.
