From 81a642e8e2c6fc8f070651e1f9b10fb563b39018 Mon Sep 17 00:00:00 2001 From: phcoder Date: Fri, 16 Oct 2009 17:40:59 +0200 Subject: [PATCH] linux.c --- include/grub/elfload.h | 4 ++-- kern/elf.c | 17 ++++++++++++++--- lib/mips/relocator.c | 12 ++++++------ lib/mips/relocator_asm.S | 26 +++++++++++++------------- 4 files changed, 35 insertions(+), 24 deletions(-) diff --git a/include/grub/elfload.h b/include/grub/elfload.h index 6e09e0d05..77ee41675 100644 --- a/include/grub/elfload.h +++ b/include/grub/elfload.h @@ -46,12 +46,12 @@ grub_elf_t grub_elf_file (grub_file_t); grub_err_t grub_elf_close (grub_elf_t); int grub_elf_is_elf32 (grub_elf_t); -grub_size_t grub_elf32_size (grub_elf_t); +grub_size_t grub_elf32_size (grub_elf_t, Elf32_Addr *); grub_err_t grub_elf32_load (grub_elf_t, grub_elf32_load_hook_t, grub_addr_t *, grub_size_t *); int grub_elf_is_elf64 (grub_elf_t); -grub_size_t grub_elf64_size (grub_elf_t); +grub_size_t grub_elf64_size (grub_elf_t, Elf64_Addr *); grub_err_t grub_elf64_load (grub_elf_t, grub_elf64_load_hook_t, grub_addr_t *, grub_size_t *); diff --git a/kern/elf.c b/kern/elf.c index f14161060..1e51839a0 100644 --- a/kern/elf.c +++ b/kern/elf.c @@ -172,7 +172,7 @@ grub_elf32_phdr_iterate (grub_elf_t elf, /* Calculate the amount of memory spanned by the segments. */ grub_size_t -grub_elf32_size (grub_elf_t elf) +grub_elf32_size (grub_elf_t elf, Elf32_Addr *base) { Elf32_Addr segments_start = (Elf32_Addr) -1; Elf32_Addr segments_end = 0; @@ -196,6 +196,9 @@ grub_elf32_size (grub_elf_t elf) grub_elf32_phdr_iterate (elf, calcsize, 0); + if (base) + *base = 0; + if (nr_phdrs == 0) { grub_error (GRUB_ERR_BAD_OS, "No program headers present"); @@ -209,10 +212,12 @@ grub_elf32_size (grub_elf_t elf) return 0; } + if (base) + *base = segments_start; + return segments_end - segments_start; } - /* Load every loadable segment into memory specified by `_load_hook'. */ grub_err_t grub_elf32_load (grub_elf_t _elf, grub_elf32_load_hook_t _load_hook, @@ -351,7 +356,7 @@ grub_elf64_phdr_iterate (grub_elf_t elf, /* Calculate the amount of memory spanned by the segments. */ grub_size_t -grub_elf64_size (grub_elf_t elf) +grub_elf64_size (grub_elf_t elf, Elf64_Addr *base) { Elf64_Addr segments_start = (Elf64_Addr) -1; Elf64_Addr segments_end = 0; @@ -375,6 +380,9 @@ grub_elf64_size (grub_elf_t elf) grub_elf64_phdr_iterate (elf, calcsize, 0); + if (base) + *base = 0; + if (nr_phdrs == 0) { grub_error (GRUB_ERR_BAD_OS, "No program headers present"); @@ -388,6 +396,9 @@ grub_elf64_size (grub_elf_t elf) return 0; } + if (base) + *base = segments_start; + return segments_end - segments_start; } diff --git a/lib/mips/relocator.c b/lib/mips/relocator.c index 4ec7f6c08..91e66893a 100644 --- a/lib/mips/relocator.c +++ b/lib/mips/relocator.c @@ -71,9 +71,9 @@ write_call_relocator_bw (void *ptr0, void *src, grub_uint32_t dest, { void *ptr = ptr0; int i; - write_reg (1, (grub_uint32_t) src, &ptr); - write_reg (2, dest, &ptr); - write_reg (3, size, &ptr); + write_reg (2, (grub_uint32_t) src, &ptr); + write_reg (3, dest, &ptr); + write_reg (4, size, &ptr); grub_memcpy (ptr, &grub_relocator32_backward_start, RELOCATOR_SRC_SIZEOF (backward)); for (i = 1; i < 32; i++) @@ -88,9 +88,9 @@ write_call_relocator_fw (void *ptr0, void *src, grub_uint32_t dest, { void *ptr = ptr0; int i; - write_reg (1, (grub_uint32_t) src, &ptr); - write_reg (2, dest, &ptr); - write_reg (3, size, &ptr); + write_reg (2, (grub_uint32_t) src, &ptr); + write_reg (3, dest, &ptr); + write_reg (4, size, &ptr); grub_memcpy (ptr, &grub_relocator32_forward_start, RELOCATOR_SRC_SIZEOF (forward)); for (i = 1; i < 32; i++) diff --git a/lib/mips/relocator_asm.S b/lib/mips/relocator_asm.S index 607a46303..24541e2d0 100644 --- a/lib/mips/relocator_asm.S +++ b/lib/mips/relocator_asm.S @@ -28,23 +28,23 @@ VARIABLE (grub_relocator32_forward_start) copycont1: - lb $4,0($1) - sb $4,0($2) - addiu $3, $3, 0xffff - subu $4,$3,$0 - bne $4, $0, copycont1 + lb $5,0($2) + sb $5,0($3) + addiu $4, $4, 0xffff + subu $5,$4,$0 + bne $5, $0, copycont1 VARIABLE (grub_relocator32_forward_end) VARIABLE (grub_relocator32_backward_start) - addu $2, $2, $3 - addu $1, $1, $3 + addu $3, $3, $4 + addu $2, $2, $4 /* Backward movsl is implicitly off-by-one. compensate that. */ + addiu $3, $3, 0xffff addiu $2, $2, 0xffff - addiu $1, $1, 0xffff copycont2: - lb $4,0($1) - sb $4,0($2) - addiu $3, 0xffff - subu $4,$3,$0 - bne $4, $0, copycont2 + lb $5,0($2) + sb $5,0($3) + addiu $4, 0xffff + subu $5,$4,$0 + bne $5, $0, copycont2 VARIABLE (grub_relocator32_backward_end)