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/* dl.c - arch-dependent part of loadable module support */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2004,2005,2007,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/elf.h>
#include <grub/misc.h>
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/i18n.h>
#include <grub/ia64/reloc.h>
#pragma GCC diagnostic ignored "-Wcast-align"
#define MASK20 ((1 << 20) - 1)
#define MASK3 (~(grub_addr_t) 3)
void
grub_ia64_set_immu64 (grub_addr_t addr, grub_uint64_t val)
{
/* Copied from binutils. */
grub_uint64_t *ptr = ((grub_uint64_t *) (addr & MASK3));
grub_uint64_t t0, t1;
t0 = grub_le_to_cpu64 (ptr[0]);
t1 = grub_le_to_cpu64 (ptr[1]);
/* tmpl/s: bits 0.. 5 in t0
slot 0: bits 5..45 in t0
slot 1: bits 46..63 in t0, bits 0..22 in t1
slot 2: bits 23..63 in t1 */
/* First, clear the bits that form the 64 bit constant. */
t0 &= ~(0x3ffffLL << 46);
t1 &= ~(0x7fffffLL
| (( (0x07fLL << 13) | (0x1ffLL << 27)
| (0x01fLL << 22) | (0x001LL << 21)
| (0x001LL << 36)) << 23));
t0 |= ((val >> 22) & 0x03ffffLL) << 46; /* 18 lsbs of imm41 */
t1 |= ((val >> 40) & 0x7fffffLL) << 0; /* 23 msbs of imm41 */
t1 |= ( (((val >> 0) & 0x07f) << 13) /* imm7b */
| (((val >> 7) & 0x1ff) << 27) /* imm9d */
| (((val >> 16) & 0x01f) << 22) /* imm5c */
| (((val >> 21) & 0x001) << 21) /* ic */
| (((val >> 63) & 0x001) << 36)) << 23; /* i */
ptr[0] = t0;
ptr[1] = t1;
}
void
grub_ia64_add_value_to_slot_20b (grub_addr_t addr, grub_uint32_t value)
{
grub_uint32_t val;
switch (addr & 3)
{
case 0:
val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
(addr & MASK3) + 2)));
val = (((((val & MASK20) + value) & MASK20) << 2)
| (val & ~(MASK20 << 2)));
grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 2),
grub_cpu_to_le32 (val));
break;
case 1:
val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
(addr & MASK3) + 7)));
val = ((((((val >> 3) & MASK20) + value) & MASK20) << 3)
| (val & ~(MASK20 << 3)));
grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 7),
grub_cpu_to_le32 (val));
break;
case 2:
val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
(addr & MASK3) + 12)));
val = ((((((val >> 4) & MASK20) + value) & MASK20) << 4)
| (val & ~(MASK20 << 4)));
grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 12),
grub_cpu_to_le32 (val));
break;
}
}
#define MASKF21 ( ((1 << 23) - 1) & ~((1 << 7) | (1 << 8)) )
static grub_uint32_t
add_value_to_slot_21_real (grub_uint32_t a, grub_uint32_t value)
{
grub_uint32_t high, mid, low, c;
low = (a & 0x00007f);
mid = (a & 0x7fc000) >> 7;
high = (a & 0x003e00) << 7;
c = (low | mid | high) + value;
return (c & 0x7f) | ((c << 7) & 0x7fc000) | ((c >> 7) & 0x0003e00); //0x003e00
}
void
grub_ia64_add_value_to_slot_21 (grub_addr_t addr, grub_uint32_t value)
{
grub_uint32_t val;
switch (addr & 3)
{
case 0:
val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
(addr & MASK3) + 2)));
val = ((add_value_to_slot_21_real (((val >> 2) & MASKF21), value)
& MASKF21) << 2) | (val & ~(MASKF21 << 2));
grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 2),
grub_cpu_to_le32 (val));
break;
case 1:
val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
(addr & MASK3) + 7)));
val = ((add_value_to_slot_21_real (((val >> 3) & MASKF21), value)
& MASKF21) << 3) | (val & ~(MASKF21 << 3));
grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 7),
grub_cpu_to_le32 (val));
break;
case 2:
val = grub_le_to_cpu32 (grub_get_unaligned32 (((grub_uint8_t *)
(addr & MASK3) + 12)));
val = ((add_value_to_slot_21_real (((val >> 4) & MASKF21), value)
& MASKF21) << 4) | (val & ~(MASKF21 << 4));
grub_set_unaligned32 (((grub_uint8_t *) (addr & MASK3) + 12),
grub_cpu_to_le32 (val));
break;
}
}
static const grub_uint8_t nopm[5] =
{
/* [MLX] nop.m 0x0 */
0x05, 0x00, 0x00, 0x00, 0x01
};
#ifdef GRUB_UTIL
static grub_uint8_t jump[0x20] =
{
/* [MMI] add r15=r15,r1;; */
0x0b, 0x78, 0x3c, 0x02, 0x00, 0x20,
/* ld8 r16=[r15],8 */
0x00, 0x41, 0x3c, 0x30, 0x28, 0xc0,
/* mov r14=r1;; */
0x01, 0x08, 0x00, 0x84,
/* [MIB] ld8 r1=[r15] */
0x11, 0x08, 0x00, 0x1e, 0x18, 0x10,
/* mov b6=r16 */
0x60, 0x80, 0x04, 0x80, 0x03, 0x00,
/* br.few b6;; */
0x60, 0x00, 0x80, 0x00
};
#else
static const grub_uint8_t jump[0x20] =
{
/* ld8 r16=[r15],8 */
0x02, 0x80, 0x20, 0x1e, 0x18, 0x14,
/* mov r14=r1;; */
0xe0, 0x00, 0x04, 0x00, 0x42, 0x00,
/* nop.i 0x0 */
0x00, 0x00, 0x04, 0x00,
/* ld8 r1=[r15] */
0x11, 0x08, 0x00, 0x1e, 0x18, 0x10,
/* mov b6=r16 */
0x60, 0x80, 0x04, 0x80, 0x03, 0x00,
/* br.few b6;; */
0x60, 0x00, 0x80, 0x00
};
#endif
void
grub_ia64_make_trampoline (struct grub_ia64_trampoline *tr, grub_uint64_t addr)
{
grub_memcpy (tr->nop, nopm, sizeof (tr->nop));
tr->addr_hi[0] = ((addr & 0xc00000) >> 16);
tr->addr_hi[1] = (addr >> 24) & 0xff;
tr->addr_hi[2] = (addr >> 32) & 0xff;
tr->addr_hi[3] = (addr >> 40) & 0xff;
tr->addr_hi[4] = (addr >> 48) & 0xff;
tr->addr_hi[5] = (addr >> 56) & 0xff;
tr->e0 = 0xe0;
tr->addr_lo[0] = ((addr & 0x000f) << 4) | 0x01;
tr->addr_lo[1] = (((addr & 0x0070) >> 4) | ((addr & 0x070000) >> 11)
| ((addr & 0x200000) >> 17));
tr->addr_lo[2] = ((addr & 0x1f80) >> 5) | ((addr & 0x180000) >> 19);
tr->addr_lo[3] = ((addr & 0xe000) >> 13) | 0x60;
grub_memcpy (tr->jump, jump, sizeof (tr->jump));
}
grub_err_t
grub_ia64_dl_get_tramp_got_size (const void *ehdr, grub_size_t *tramp,
grub_size_t *got)
{
const Elf64_Ehdr *e = ehdr;
grub_size_t cntt = 0, cntg = 0;
const Elf64_Shdr *s;
unsigned i;
for (i = 0, s = (Elf64_Shdr *) ((char *) e + grub_le_to_cpu64 (e->e_shoff));
i < grub_le_to_cpu16 (e->e_shnum);
i++, s = (Elf64_Shdr *) ((char *) s + grub_le_to_cpu16 (e->e_shentsize)))
if (s->sh_type == grub_cpu_to_le32_compile_time (SHT_RELA))
{
const Elf64_Rela *rel, *max;
for (rel = (Elf64_Rela *) ((char *) e + grub_le_to_cpu64 (s->sh_offset)),
max = (const Elf64_Rela *) ((char *) rel + grub_le_to_cpu64 (s->sh_size));
rel < max; rel = (const Elf64_Rela *) ((char *) rel + grub_le_to_cpu64 (s->sh_entsize)))
switch (ELF64_R_TYPE (grub_le_to_cpu64 (rel->r_info)))
{
case R_IA64_PCREL21B:
cntt++;
break;
case R_IA64_LTOFF_FPTR22:
case R_IA64_LTOFF22X:
case R_IA64_LTOFF22:
cntg++;
break;
}
}
*tramp = cntt * sizeof (struct grub_ia64_trampoline);
*got = cntg * sizeof (grub_uint64_t);
return GRUB_ERR_NONE;
}
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