mirror of
https://git.proxmox.com/git/grub2
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8c534b85f1
Move more code to common dl.c. Add missing veneers for arm and arm64. Decreases kernel size by 70 bytes on i386-pc (40-50 compressed)
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* dl_helper.c - relocation helper functions for modules and grub-mkimage */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/elf.h>
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#include <grub/misc.h>
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#include <grub/err.h>
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#include <grub/mm.h>
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#include <grub/i18n.h>
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#include <grub/arm64/reloc.h>
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/*
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* grub_arm64_reloc_xxxx26():
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*
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* JUMP26/CALL26 relocations for B and BL instructions.
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*/
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int
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grub_arm_64_check_xxxx26_offset (grub_int64_t offset)
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{
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const grub_ssize_t offset_low = -(1 << 27), offset_high = (1 << 27) - 1;
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if ((offset < offset_low) || (offset > offset_high))
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return 0;
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return 1;
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}
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void
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grub_arm64_set_xxxx26_offset (grub_uint32_t *place, grub_int64_t offset)
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{
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const grub_uint32_t insmask = grub_cpu_to_le32_compile_time (0xfc000000);
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grub_dprintf ("dl", " reloc_xxxx64 %p %c= 0x%llx\n",
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place, offset > 0 ? '+' : '-',
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offset < 0 ? (long long) -(unsigned long long) offset : offset);
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*place &= insmask;
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*place |= grub_cpu_to_le32 (offset >> 2) & ~insmask;
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}
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