|
|
From 2dae852b62bb2227ba2e4faf4864c7779104657a Mon Sep 17 00:00:00 2001 |
|
|
From: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com> |
|
|
Date: Fri, 15 Aug 2014 14:39:53 -0300 |
|
|
Subject: [PATCH 143/237] Suport for bi-endianess in elf file |
|
|
|
|
|
* grub-core/kern/elf.c: check and switch endianess with grub_{be,le}_to |
|
|
cpu functions. |
|
|
* grub-core/kern/elfXX.c: Likewise. |
|
|
|
|
|
Also-by: Tomohiro B Berry <tbberry@us.ibm.com> |
|
|
--- |
|
|
grub-core/kern/elf.c | 60 +++++++++++++++++++++++++++++++++++++++-- |
|
|
grub-core/kern/elfXX.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++ |
|
|
2 files changed, 131 insertions(+), 2 deletions(-) |
|
|
|
|
|
diff --git a/grub-core/kern/elf.c b/grub-core/kern/elf.c |
|
|
index 5f99c43..de90811 100644 |
|
|
--- a/grub-core/kern/elf.c |
|
|
+++ b/grub-core/kern/elf.c |
|
|
@@ -28,6 +28,11 @@ |
|
|
|
|
|
GRUB_MOD_LICENSE ("GPLv3+"); |
|
|
|
|
|
+void grub_elf32_check_endianess (grub_elf_t elf); |
|
|
+void grub_elf64_check_endianess (grub_elf_t elf); |
|
|
+grub_err_t grub_elf32_check_version (grub_elf_t elf); |
|
|
+grub_err_t grub_elf64_check_version (grub_elf_t elf); |
|
|
+ |
|
|
/* Check if EHDR is a valid ELF header. */ |
|
|
static grub_err_t |
|
|
grub_elf_check_header (grub_elf_t elf) |
|
|
@@ -38,10 +43,22 @@ grub_elf_check_header (grub_elf_t elf) |
|
|
|| e->e_ident[EI_MAG1] != ELFMAG1 |
|
|
|| e->e_ident[EI_MAG2] != ELFMAG2 |
|
|
|| e->e_ident[EI_MAG3] != ELFMAG3 |
|
|
- || e->e_ident[EI_VERSION] != EV_CURRENT |
|
|
- || e->e_version != EV_CURRENT) |
|
|
+ || e->e_ident[EI_VERSION] != EV_CURRENT) |
|
|
return grub_error (GRUB_ERR_BAD_OS, N_("invalid arch-independent ELF magic")); |
|
|
|
|
|
+ if (grub_elf_is_elf32 (elf)) |
|
|
+ { |
|
|
+ grub_elf32_check_endianess (elf); |
|
|
+ grub_elf32_check_version (elf); |
|
|
+ } |
|
|
+ else if (grub_elf_is_elf64 (elf)) |
|
|
+ { |
|
|
+ grub_elf64_check_endianess (elf); |
|
|
+ grub_elf64_check_version (elf); |
|
|
+ } |
|
|
+ else |
|
|
+ return grub_error (GRUB_ERR_BAD_OS, N_("invalid arch-dependent ELF magic")); |
|
|
+ |
|
|
return GRUB_ERR_NONE; |
|
|
} |
|
|
|
|
|
@@ -127,7 +144,20 @@ grub_elf_open (const char *name) |
|
|
#define grub_elf_is_elfXX grub_elf_is_elf32 |
|
|
#define grub_elfXX_load_phdrs grub_elf32_load_phdrs |
|
|
#define ElfXX_Phdr Elf32_Phdr |
|
|
+#define ElfXX_Ehdr Elf32_Ehdr |
|
|
#define grub_uintXX_t grub_uint32_t |
|
|
+#define grub_be_to_halfXX grub_be_to_cpu16 |
|
|
+#define grub_be_to_wordXX grub_be_to_cpu32 |
|
|
+#define grub_be_to_addrXX grub_be_to_cpu32 |
|
|
+#define grub_be_to_offXX grub_be_to_cpu32 |
|
|
+#define grub_be_to_XwordXX grub_be_to_wordXX |
|
|
+#define grub_le_to_halfXX grub_le_to_cpu16 |
|
|
+#define grub_le_to_wordXX grub_le_to_cpu32 |
|
|
+#define grub_le_to_addrXX grub_le_to_cpu32 |
|
|
+#define grub_le_to_offXX grub_le_to_cpu32 |
|
|
+#define grub_le_to_XwordXX grub_le_to_wordXX |
|
|
+#define grub_elfXX_check_endianess grub_elf32_check_endianess |
|
|
+#define grub_elfXX_check_version grub_elf32_check_version |
|
|
|
|
|
#include "elfXX.c" |
|
|
|
|
|
@@ -140,7 +170,20 @@ grub_elf_open (const char *name) |
|
|
#undef grub_elf_is_elfXX |
|
|
#undef grub_elfXX_load_phdrs |
|
|
#undef ElfXX_Phdr |
|
|
+#undef ElfXX_Ehdr |
|
|
#undef grub_uintXX_t |
|
|
+#undef grub_be_to_halfXX |
|
|
+#undef grub_be_to_wordXX |
|
|
+#undef grub_be_to_addrXX |
|
|
+#undef grub_be_to_offXX |
|
|
+#undef grub_be_to_XwordXX |
|
|
+#undef grub_le_to_halfXX |
|
|
+#undef grub_le_to_wordXX |
|
|
+#undef grub_le_to_addrXX |
|
|
+#undef grub_le_to_offXX |
|
|
+#undef grub_le_to_XwordXX |
|
|
+#undef grub_elfXX_check_endianess |
|
|
+#undef grub_elfXX_check_version |
|
|
|
|
|
|
|
|
/* 64-bit */ |
|
|
@@ -153,6 +196,19 @@ grub_elf_open (const char *name) |
|
|
#define grub_elf_is_elfXX grub_elf_is_elf64 |
|
|
#define grub_elfXX_load_phdrs grub_elf64_load_phdrs |
|
|
#define ElfXX_Phdr Elf64_Phdr |
|
|
+#define ElfXX_Ehdr Elf64_Ehdr |
|
|
#define grub_uintXX_t grub_uint64_t |
|
|
+#define grub_be_to_halfXX grub_be_to_cpu16 |
|
|
+#define grub_be_to_wordXX grub_be_to_cpu32 |
|
|
+#define grub_be_to_addrXX grub_be_to_cpu64 |
|
|
+#define grub_be_to_offXX grub_be_to_cpu64 |
|
|
+#define grub_be_to_XwordXX grub_be_to_cpu64 |
|
|
+#define grub_le_to_halfXX grub_le_to_cpu16 |
|
|
+#define grub_le_to_wordXX grub_le_to_cpu32 |
|
|
+#define grub_le_to_addrXX grub_le_to_cpu64 |
|
|
+#define grub_le_to_offXX grub_le_to_cpu64 |
|
|
+#define grub_le_to_XwordXX grub_le_to_cpu64 |
|
|
+#define grub_elfXX_check_endianess grub_elf64_check_endianess |
|
|
+#define grub_elfXX_check_version grub_elf64_check_version |
|
|
|
|
|
#include "elfXX.c" |
|
|
diff --git a/grub-core/kern/elfXX.c b/grub-core/kern/elfXX.c |
|
|
index 1d09971..ecf9df6 100644 |
|
|
--- a/grub-core/kern/elfXX.c |
|
|
+++ b/grub-core/kern/elfXX.c |
|
|
@@ -154,3 +154,76 @@ grub_elfXX_load (grub_elf_t elf, const char *filename, |
|
|
|
|
|
return grub_errno; |
|
|
} |
|
|
+ |
|
|
+void |
|
|
+grub_elfXX_check_endianess (grub_elf_t elf) |
|
|
+{ |
|
|
+ ElfXX_Ehdr *e = &(elf->ehdr.ehdrXX); |
|
|
+ ElfXX_Phdr *phdr; |
|
|
+ |
|
|
+ if (e->e_ident[EI_DATA] == ELFDATA2MSB) |
|
|
+ { |
|
|
+ e->e_type = grub_be_to_halfXX (e->e_type); |
|
|
+ e->e_machine = grub_be_to_halfXX (e->e_machine); |
|
|
+ e->e_version = grub_be_to_wordXX (e->e_version); |
|
|
+ e->e_entry = grub_be_to_addrXX (e->e_entry); |
|
|
+ e->e_phoff = grub_be_to_offXX (e->e_phoff); |
|
|
+ e->e_shoff = grub_be_to_offXX (e->e_shoff); |
|
|
+ e->e_flags = grub_be_to_wordXX (e->e_flags); |
|
|
+ e->e_ehsize = grub_be_to_halfXX (e->e_ehsize); |
|
|
+ e->e_phentsize = grub_be_to_halfXX (e->e_phentsize); |
|
|
+ e->e_phnum = grub_be_to_halfXX (e->e_phnum); |
|
|
+ e->e_shentsize = grub_be_to_halfXX (e->e_shentsize); |
|
|
+ e->e_shnum = grub_be_to_halfXX (e->e_shnum); |
|
|
+ e->e_shstrndx = grub_be_to_halfXX (e->e_shstrndx); |
|
|
+ |
|
|
+ FOR_ELFXX_PHDRS (elf,phdr) |
|
|
+ { |
|
|
+ phdr->p_type = grub_be_to_wordXX (phdr->p_type); |
|
|
+ phdr->p_flags = grub_be_to_wordXX (phdr->p_flags); |
|
|
+ phdr->p_offset = grub_be_to_offXX (phdr->p_offset); |
|
|
+ phdr->p_vaddr = grub_be_to_addrXX (phdr->p_vaddr); |
|
|
+ phdr->p_paddr = grub_be_to_addrXX (phdr->p_paddr); |
|
|
+ phdr->p_filesz = grub_be_to_XwordXX (phdr->p_filesz); |
|
|
+ phdr->p_memsz = grub_be_to_XwordXX (phdr->p_memsz); |
|
|
+ phdr->p_align = grub_be_to_XwordXX (phdr->p_align); |
|
|
+ } |
|
|
+ } |
|
|
+ else if (e->e_ident[EI_DATA] == ELFDATA2LSB) |
|
|
+ { |
|
|
+ e->e_type = grub_le_to_halfXX (e->e_type); |
|
|
+ e->e_machine = grub_le_to_halfXX (e->e_machine); |
|
|
+ e->e_version = grub_le_to_wordXX (e->e_version); |
|
|
+ e->e_entry = grub_le_to_addrXX (e->e_entry); |
|
|
+ e->e_phoff = grub_le_to_offXX (e->e_phoff); |
|
|
+ e->e_shoff = grub_le_to_offXX (e->e_shoff); |
|
|
+ e->e_flags = grub_le_to_wordXX (e->e_flags); |
|
|
+ e->e_ehsize = grub_le_to_halfXX (e->e_ehsize); |
|
|
+ e->e_phentsize = grub_le_to_halfXX (e->e_phentsize); |
|
|
+ e->e_phnum = grub_le_to_halfXX (e->e_phnum); |
|
|
+ e->e_shentsize = grub_le_to_halfXX (e->e_shentsize); |
|
|
+ e->e_shnum = grub_le_to_halfXX (e->e_shnum); |
|
|
+ e->e_shstrndx = grub_le_to_halfXX (e->e_shstrndx); |
|
|
+ |
|
|
+ FOR_ELFXX_PHDRS (elf,phdr) |
|
|
+ { |
|
|
+ phdr->p_type = grub_le_to_wordXX (phdr->p_type); |
|
|
+ phdr->p_flags = grub_le_to_wordXX (phdr->p_flags); |
|
|
+ phdr->p_offset = grub_le_to_offXX (phdr->p_offset); |
|
|
+ phdr->p_vaddr = grub_le_to_addrXX (phdr->p_vaddr); |
|
|
+ phdr->p_paddr = grub_le_to_addrXX (phdr->p_paddr); |
|
|
+ phdr->p_filesz = grub_le_to_XwordXX (phdr->p_filesz); |
|
|
+ phdr->p_memsz = grub_le_to_XwordXX (phdr->p_memsz); |
|
|
+ phdr->p_align = grub_le_to_XwordXX (phdr->p_align); |
|
|
+ } |
|
|
+ } |
|
|
+} |
|
|
+ |
|
|
+grub_err_t |
|
|
+grub_elfXX_check_version (grub_elf_t elf) |
|
|
+{ |
|
|
+ if (elf->ehdr.ehdrXX.e_version != EV_CURRENT) |
|
|
+ return grub_error (GRUB_ERR_BAD_OS, N_("invalid arch-independent ELF magic")); |
|
|
+ |
|
|
+ return GRUB_ERR_NONE; |
|
|
+} |
|
|
-- |
|
|
2.9.3 |
|
|
|
|
|
|
