219 lines
6.9 KiB
C
219 lines
6.9 KiB
C
/* dl.c - arch-dependent part of loadable module support */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2004,2005,2007,2009 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/ia64/reloc.h>
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#pragma GCC diagnostic ignored "-Wcast-align"
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#define MASK20 ((1 << 20) - 1)
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#define MASK3 (~(grub_addr_t) 3)
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void
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grub_ia64_add_value_to_slot_20b (grub_addr_t addr, grub_uint32_t value)
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{
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grub_uint32_t val;
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switch (addr & 3)
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{
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case 0:
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val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
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(addr & MASK3) + 2)));
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val = (((((val & MASK20) + value) & MASK20) << 2)
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| (val & ~(MASK20 << 2)));
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grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 2),
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grub_cpu_to_le32 (val));
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break;
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case 1:
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val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
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(addr & MASK3) + 7)));
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val = ((((((val >> 3) & MASK20) + value) & MASK20) << 3)
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| (val & ~(MASK20 << 3)));
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grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 7),
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grub_cpu_to_le32 (val));
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break;
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case 2:
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val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
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(addr & MASK3) + 12)));
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val = ((((((val >> 4) & MASK20) + value) & MASK20) << 4)
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| (val & ~(MASK20 << 4)));
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grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 12),
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grub_cpu_to_le32 (val));
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break;
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}
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}
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#define MASKF21 ( ((1 << 23) - 1) & ~((1 << 7) | (1 << 8)) )
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static grub_uint32_t
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add_value_to_slot_21_real (grub_uint32_t a, grub_uint32_t value)
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{
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grub_uint32_t high, mid, low, c;
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low = (a & 0x00007f);
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mid = (a & 0x7fc000) >> 7;
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high = (a & 0x003e00) << 7;
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c = (low | mid | high) + value;
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return (c & 0x7f) | ((c << 7) & 0x7fc000) | ((c >> 7) & 0x0003e00); //0x003e00
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}
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void
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grub_ia64_add_value_to_slot_21 (grub_addr_t addr, grub_uint32_t value)
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{
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grub_uint32_t val;
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switch (addr & 3)
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{
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case 0:
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val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
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(addr & MASK3) + 2)));
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val = ((add_value_to_slot_21_real (((val >> 2) & MASKF21), value)
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& MASKF21) << 2) | (val & ~(MASKF21 << 2));
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grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 2),
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grub_cpu_to_le32 (val));
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break;
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case 1:
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val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
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(addr & MASK3) + 7)));
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val = ((add_value_to_slot_21_real (((val >> 3) & MASKF21), value)
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& MASKF21) << 3) | (val & ~(MASKF21 << 3));
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grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 7),
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grub_cpu_to_le32 (val));
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break;
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case 2:
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val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
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(addr & MASK3) + 12)));
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val = ((add_value_to_slot_21_real (((val >> 4) & MASKF21), value)
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& MASKF21) << 4) | (val & ~(MASKF21 << 4));
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grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 12),
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grub_cpu_to_le32 (val));
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break;
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}
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}
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static const grub_uint8_t nopm[5] =
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{
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/* [MLX] nop.m 0x0 */
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0x05, 0x00, 0x00, 0x00, 0x01
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};
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#ifdef GRUB_UTIL
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static grub_uint8_t jump[0x20] =
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{
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/* [MMI] add r15=r15,r1;; */
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0x0b, 0x78, 0x3c, 0x02, 0x00, 0x20,
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/* ld8 r16=[r15],8 */
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0x00, 0x41, 0x3c, 0x30, 0x28, 0xc0,
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/* mov r14=r1;; */
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0x01, 0x08, 0x00, 0x84,
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/* [MIB] ld8 r1=[r15] */
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0x11, 0x08, 0x00, 0x1e, 0x18, 0x10,
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/* mov b6=r16 */
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0x60, 0x80, 0x04, 0x80, 0x03, 0x00,
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/* br.few b6;; */
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0x60, 0x00, 0x80, 0x00
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};
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#else
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static const grub_uint8_t jump[0x20] =
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{
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/* ld8 r16=[r15],8 */
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0x02, 0x80, 0x20, 0x1e, 0x18, 0x14,
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/* mov r14=r1;; */
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0xe0, 0x00, 0x04, 0x00, 0x42, 0x00,
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/* nop.i 0x0 */
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0x00, 0x00, 0x04, 0x00,
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/* ld8 r1=[r15] */
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0x11, 0x08, 0x00, 0x1e, 0x18, 0x10,
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/* mov b6=r16 */
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0x60, 0x80, 0x04, 0x80, 0x03, 0x00,
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/* br.few b6;; */
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0x60, 0x00, 0x80, 0x00
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};
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#endif
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void
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grub_ia64_make_trampoline (struct grub_ia64_trampoline *tr, grub_uint64_t addr)
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{
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COMPILE_TIME_ASSERT (sizeof (struct grub_ia64_trampoline)
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== GRUB_IA64_DL_TRAMP_SIZE);
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grub_memcpy (tr->nop, nopm, sizeof (tr->nop));
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tr->addr_hi[0] = ((addr & 0xc00000) >> 16);
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tr->addr_hi[1] = (addr >> 24) & 0xff;
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tr->addr_hi[2] = (addr >> 32) & 0xff;
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tr->addr_hi[3] = (addr >> 40) & 0xff;
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tr->addr_hi[4] = (addr >> 48) & 0xff;
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tr->addr_hi[5] = (addr >> 56) & 0xff;
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tr->e0 = 0xe0;
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tr->addr_lo[0] = ((addr & 0x000f) << 4) | 0x01;
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tr->addr_lo[1] = (((addr & 0x0070) >> 4) | ((addr & 0x070000) >> 11)
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| ((addr & 0x200000) >> 17));
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tr->addr_lo[2] = ((addr & 0x1f80) >> 5) | ((addr & 0x180000) >> 19);
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tr->addr_lo[3] = ((addr & 0xe000) >> 13) | 0x60;
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grub_memcpy (tr->jump, jump, sizeof (tr->jump));
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}
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grub_err_t
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grub_ia64_dl_get_tramp_got_size (const void *ehdr, grub_size_t *tramp,
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grub_size_t *got)
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{
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const Elf64_Ehdr *e = ehdr;
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grub_size_t cntt = 0, cntg = 0;;
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const Elf64_Shdr *s;
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unsigned i;
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/* Find a symbol table. */
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for (i = 0, s = (Elf64_Shdr *) ((char *) e + grub_le_to_cpu64 (e->e_shoff));
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i < grub_le_to_cpu16 (e->e_shnum);
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i++, s = (Elf64_Shdr *) ((char *) s + grub_le_to_cpu16 (e->e_shentsize)))
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if (s->sh_type == grub_cpu_to_le32_compile_time (SHT_SYMTAB))
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break;
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if (i == grub_le_to_cpu16 (e->e_shnum))
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return GRUB_ERR_NONE;
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for (i = 0, s = (Elf64_Shdr *) ((char *) e + grub_le_to_cpu64 (e->e_shoff));
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i < grub_le_to_cpu16 (e->e_shnum);
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i++, s = (Elf64_Shdr *) ((char *) s + grub_le_to_cpu16 (e->e_shentsize)))
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if (s->sh_type == grub_cpu_to_le32_compile_time (SHT_RELA))
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{
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Elf64_Rela *rel, *max;
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for (rel = (Elf64_Rela *) ((char *) e + grub_le_to_cpu64 (s->sh_offset)),
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max = rel + grub_le_to_cpu64 (s->sh_size) / grub_le_to_cpu64 (s->sh_entsize);
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rel < max; rel++)
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switch (ELF64_R_TYPE (grub_le_to_cpu64 (rel->r_info)))
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{
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case R_IA64_PCREL21B:
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cntt++;
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break;
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case R_IA64_LTOFF_FPTR22:
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case R_IA64_LTOFF22X:
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case R_IA64_LTOFF22:
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cntg++;
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break;
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}
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}
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*tramp = cntt * sizeof (struct grub_ia64_trampoline);
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*got = cntg * sizeof (grub_uint64_t);
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return GRUB_ERR_NONE;
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}
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