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This commit is contained in:
phcoder 2009-10-17 12:18:39 +02:00
parent ea818634b5
commit a45337b5d7
4 changed files with 20 additions and 18 deletions
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6
conf/mips.rmk
View file

@ -147,4 +147,10 @@ relocator_mod_CFLAGS = $(COMMON_CFLAGS)
relocator_mod_ASFLAGS = $(COMMON_ASFLAGS)
relocator_mod_LDFLAGS = $(COMMON_LDFLAGS)
pkglib_MODULES += linux.mod
linux_mod_SOURCES = loader/$(target_cpu)/linux.c
linux_mod_CFLAGS = $(COMMON_CFLAGS)
linux_mod_ASFLAGS = $(COMMON_ASFLAGS)
linux_mod_LDFLAGS = $(COMMON_LDFLAGS)
include $(srcdir)/conf/common.mk

8
lib/mips/relocator.c
View file

@ -53,7 +53,7 @@ write_reg (int regn, grub_uint32_t val, void **target)
*target = ((grub_uint32_t *) *target) + 1;
/* addiu $r, $r, val. */
*(grub_uint32_t *) *target = (((0x2400 | regn << 5 | regn) << 16)
| ((val + 0x8000) >> 16));
| (val & 0xffff));
*target = ((grub_uint32_t *) *target) + 1;
}
@ -76,10 +76,11 @@ write_call_relocator_bw (void *ptr0, void *src, grub_uint32_t dest,
write_reg (4, size, &ptr);
grub_memcpy (ptr, &grub_relocator32_backward_start,
RELOCATOR_SRC_SIZEOF (backward));
ptr = (grub_uint8_t *) ptr + RELOCATOR_SRC_SIZEOF (backward);
for (i = 1; i < 32; i++)
write_reg (i, state.gpr[i], &ptr);
write_jump (state.jumpreg, &ptr);
((void (*) ())ptr0) ();
((void (*) ()) ptr0) ();
}
static void
@ -93,10 +94,11 @@ write_call_relocator_fw (void *ptr0, void *src, grub_uint32_t dest,
write_reg (4, size, &ptr);
grub_memcpy (ptr, &grub_relocator32_forward_start,
RELOCATOR_SRC_SIZEOF (forward));
ptr = (grub_uint8_t *) ptr + RELOCATOR_SRC_SIZEOF (forward);
for (i = 1; i < 32; i++)
write_reg (i, state.gpr[i], &ptr);
write_jump (state.jumpreg, &ptr);
((void (*) ())ptr0) ();
((void (*) ()) ptr0) ();
}
#include "../relocator.c"

4
lib/mips/relocator_asm.S
View file

@ -30,6 +30,8 @@ VARIABLE (grub_relocator32_forward_start)
copycont1:
lb $5,0($2)
sb $5,0($3)
addiu $2, $2, 0x1
addiu $3, $3, 0x1
addiu $4, $4, 0xffff
subu $5,$4,$0
bne $5, $0, copycont1
@ -44,6 +46,8 @@ VARIABLE (grub_relocator32_backward_start)
copycont2:
lb $5,0($2)
sb $5,0($3)
addiu $2, $2, 0xffff
addiu $3, $3, 0xffff
addiu $4, 0xffff
subu $5,$4,$0
bne $5, $0, copycont2

20
loader/mips/linux.c
View file

@ -45,7 +45,6 @@ static grub_addr_t target_addr, entry_addr, initrd_addr, args_addr;
static grub_err_t
grub_linux_boot (void)
{
grub_ssize_t actual;
struct grub_relocator32_state state;
/* Boot the kernel. */
@ -81,7 +80,6 @@ static grub_err_t
grub_linux_load32 (grub_elf_t elf, char *args)
{
Elf32_Addr base;
int found_addr = 0;
int argsoff;
/* Linux's entry point incorrectly contains a virtual address. */
@ -116,17 +114,16 @@ grub_linux_load32 (grub_elf_t elf, char *args)
/* Linux's program headers incorrectly contain virtual addresses.
* Translate those to physical, and offset to the area we claimed. */
*addr = phdr->p_paddr - base + playground;
*addr = (grub_addr_t) (phdr->p_paddr - base + playground);
return 0;
}
return grub_elf32_load (elf, offset_phdr, 0, 0);
}
static grub_err_t
grub_linux_load64 (grub_elf_t elf)
grub_linux_load64 (grub_elf_t elf, char *args)
{
Elf64_Addr base;
int found_addr = 0;
int argsoff;
/* Linux's entry point incorrectly contains a virtual address. */
@ -160,7 +157,7 @@ grub_linux_load64 (grub_elf_t elf)
*do_load = 1;
/* Linux's program headers incorrectly contain virtual addresses.
* Translate those to physical, and offset to the area we claimed. */
*addr = phdr->p_paddr - base + playground;
*addr = (grub_addr_t) (phdr->p_paddr - base + playground);
return 0;
}
return grub_elf64_load (elf, offset_phdr, 0, 0);
@ -254,19 +251,12 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
grub_file_t file = 0;
grub_ssize_t size;
grub_addr_t addr;
int found_addr = 0;
if (argc == 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "no initrd specified");
goto fail;
}
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no initrd specified");
if (!loaded)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "You need to load the kernel first.");
goto fail;
}
return grub_error (GRUB_ERR_BAD_ARGUMENT, "You need to load the kernel first.");
file = grub_file_open (argv[0]);
if (! file)