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Fix ia64-efi image generation on big-endian machines. Deduplicate

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some code while on it.
	Reported by: Leif Lindholm.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-04-09 19:19:19 +02:00
parent 18866643f7
commit d5e2a158e1
6 changed files with 243 additions and 286 deletions
Download patch file Download diff file Expand all files Collapse all files

135
grub-core/kern/ia64/dl.c
View file

@ -23,6 +23,9 @@
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/i18n.h>
#include <grub/ia64/reloc.h>
#define MASK19 ((1 << 19) - 1)
/* Check if EHDR is a valid ELF header. */
grub_err_t
@ -41,126 +44,6 @@ grub_arch_dl_check_header (void *ehdr)
#pragma GCC diagnostic ignored "-Wcast-align"
#define MASK20 ((1 << 20) - 1)
#define MASK19 ((1 << 19) - 1)
struct unaligned_uint32
{
grub_uint32_t val;
} __attribute__ ((packed));
static void
add_value_to_slot_20b (grub_addr_t addr, grub_uint32_t value)
{
struct unaligned_uint32 *p;
switch (addr & 3)
{
case 0:
p = (struct unaligned_uint32 *) ((addr & ~3ULL) + 2);
p->val = ((((((p->val >> 2) & MASK20) + value) & MASK20) << 2)
| (p->val & ~(MASK20 << 2)));
break;
case 1:
p = (struct unaligned_uint32 *) ((grub_uint8_t *) (addr & ~3ULL) + 7);
p->val = ((((((p->val >> 3) & MASK20) + value) & MASK20) << 3)
| (p->val & ~(MASK20 << 3)));
break;
case 2:
p = (struct unaligned_uint32 *) ((grub_uint8_t *) (addr & ~3ULL) + 12);
p->val = ((((((p->val >> 4) & MASK20) + value) & MASK20) << 4)
| (p->val & ~(MASK20 << 4)));
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
}
static void
add_value_to_slot_21 (grub_addr_t addr, grub_uint32_t value)
{
struct unaligned_uint32 *p;
switch (addr & 3)
{
case 0:
p = (struct unaligned_uint32 *) ((addr & ~3ULL) + 2);
p->val = ((add_value_to_slot_21_real (((p->val >> 2) & MASKF21), value) & MASKF21) << 2) | (p->val & ~(MASKF21 << 2));
break;
case 1:
p = (struct unaligned_uint32 *) ((grub_uint8_t *) (addr & ~3ULL) + 7);
p->val = ((add_value_to_slot_21_real (((p->val >> 3) & MASKF21), value) & MASKF21) << 3) | (p->val & ~(MASKF21 << 3));
break;
case 2:
p = (struct unaligned_uint32 *) ((grub_uint8_t *) (addr & ~3ULL) + 12);
p->val = ((add_value_to_slot_21_real (((p->val >> 4) & MASKF21), value) & MASKF21) << 4) | (p->val & ~(MASKF21 << 4));
break;
}
}
static const grub_uint8_t nopm[5] =
{
/* [MLX] nop.m 0x0 */
0x05, 0x00, 0x00, 0x00, 0x01
};
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
};
struct ia64_trampoline
{
/* nop.m */
grub_uint8_t nop[5];
/* movl r15 = addr*/
grub_uint8_t addr_hi[6];
grub_uint8_t e0;
grub_uint8_t addr_lo[4];
grub_uint8_t jump[0x20];
};
static void
make_trampoline (struct ia64_trampoline *tr, grub_uint64_t addr)
{
COMPILE_TIME_ASSERT (sizeof (struct ia64_trampoline)
== GRUB_IA64_DL_TRAMP_SIZE);
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));
}
/* Relocate symbols. */
grub_err_t
grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
@ -170,7 +53,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
Elf_Word entsize;
unsigned i;
grub_uint64_t *gp, *gpptr;
struct ia64_trampoline *tr;
struct grub_ia64_trampoline *tr;
gp = (grub_uint64_t *) mod->base;
gpptr = (grub_uint64_t *) mod->got;
@ -230,13 +113,13 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
case R_IA64_PCREL21B:
{
grub_uint64_t noff;
make_trampoline (tr, value);
grub_ia64_make_trampoline (tr, value);
noff = ((char *) tr - (char *) (addr & ~3)) >> 4;
tr++;
tr = (struct grub_ia64_trampoline *) ((char *) tr + GRUB_IA64_DL_TRAMP_SIZE);
if (noff & ~MASK19)
return grub_error (GRUB_ERR_BAD_OS,
"trampoline offset too big (%lx)", noff);
add_value_to_slot_20b (addr, noff);
grub_ia64_add_value_to_slot_20b (addr, noff);
}
break;
case R_IA64_SEGREL64LSB:
@ -250,7 +133,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
*(grub_uint64_t *) addr += value - addr;
break;
case R_IA64_GPREL22:
add_value_to_slot_21 (addr, value - (grub_addr_t) gp);
grub_ia64_add_value_to_slot_21 (addr, value - (grub_addr_t) gp);
break;
case R_IA64_LTOFF22X:
@ -259,7 +142,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
value = *(grub_uint64_t *) sym->st_value + rel->r_addend;
case R_IA64_LTOFF_FPTR22:
*gpptr = value;
add_value_to_slot_21 (addr, (grub_addr_t) gpptr - (grub_addr_t) gp);
grub_ia64_add_value_to_slot_21 (addr, (grub_addr_t) gpptr - (grub_addr_t) gp);
gpptr++;
break;

159
grub-core/kern/ia64/dl_helper.c
View file

@ -22,9 +22,154 @@
#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_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)
{
COMPILE_TIME_ASSERT (sizeof (struct grub_ia64_trampoline)
== GRUB_IA64_DL_TRAMP_SIZE);
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));
}
void
grub_ia64_dl_get_tramp_got_size (const void *ehdr, grub_size_t *tramp,
grub_size_t *got)
@ -35,26 +180,26 @@ grub_ia64_dl_get_tramp_got_size (const void *ehdr, grub_size_t *tramp,
unsigned i;
/* Find a symbol table. */
for (i = 0, s = (Elf64_Shdr *) ((char *) e + grub_le_to_cpu32 (e->e_shoff));
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 (grub_le_to_cpu32 (s->sh_type) == SHT_SYMTAB)
if (s->sh_type == grub_cpu_to_le32_compile_time (SHT_SYMTAB))
break;
if (i == grub_le_to_cpu16 (e->e_shnum))
return;
for (i = 0, s = (Elf64_Shdr *) ((char *) e + grub_le_to_cpu32 (e->e_shoff));
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 (grub_le_to_cpu32 (s->sh_type) == SHT_RELA)
if (s->sh_type == grub_cpu_to_le32_compile_time (SHT_RELA))
{
Elf64_Rela *rel, *max;
for (rel = (Elf64_Rela *) ((char *) e + grub_le_to_cpu32 (s->sh_offset)),
max = rel + grub_le_to_cpu32 (s->sh_size) / grub_le_to_cpu16 (s->sh_entsize);
for (rel = (Elf64_Rela *) ((char *) e + grub_le_to_cpu64 (s->sh_offset)),
max = rel + grub_le_to_cpu64 (s->sh_size) / grub_le_to_cpu64 (s->sh_entsize);
rel < max; rel++)
switch (ELF64_R_TYPE (grub_le_to_cpu32 (rel->r_info)))
switch (ELF64_R_TYPE (grub_le_to_cpu64 (rel->r_info)))
{
case R_IA64_PCREL21B:
cntt++;