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grub2/0185-Make-elfload-not-use-hooks.-Opt-for-flags-and-iterat.patch
Peter Jones f74b50e380 Rebase to upstream, fix a pile of bugs. The usual. 
Signed-off-by: Peter Jones <pjones@redhat.com>
2013-06-12 15:37:08 -04:00

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From 6b0582fa0af9c5b2c3537198b3b142222137978c Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Sat, 2 Mar 2013 16:45:57 +0100
Subject: [PATCH 185/482] Make elfload not use hooks. Opt for flags and
iterators instead.
---
ChangeLog | 4 +
grub-core/kern/elf.c | 455 +++------------------------
grub-core/kern/elfXX.c | 144 +++++++++
grub-core/loader/i386/bsd.c | 137 +++-----
grub-core/loader/i386/coreboot/chainloader.c | 69 ++--
grub-core/loader/mips/linux.c | 37 +--
grub-core/loader/powerpc/ieee1275/linux.c | 34 +-
grub-core/loader/sparc64/ieee1275/linux.c | 18 +-
include/grub/elfload.h | 35 ++-
9 files changed, 301 insertions(+), 632 deletions(-)
create mode 100644 grub-core/kern/elfXX.c
diff --git a/ChangeLog b/ChangeLog
index d55dd8f..7c80ed6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
2013-03-02 Vladimir Serbinenko <phcoder@gmail.com>
+ Make elfload not use hooks. Opt for flags and iterators instead.
+
+2013-03-02 Vladimir Serbinenko <phcoder@gmail.com>
+
* grub-core/lib/ia64/longjmp.S: Fix the name of longjmp function.
* grub-core/lib/ia64/setjmp.S: Fix the name of setjmp function.
diff --git a/grub-core/kern/elf.c b/grub-core/kern/elf.c
index f52ca21..5f99c43 100644
--- a/grub-core/kern/elf.c
+++ b/grub-core/kern/elf.c
@@ -51,6 +51,7 @@ grub_elf_close (grub_elf_t elf)
grub_file_t file = elf->file;
grub_free (elf->phdrs);
+ grub_free (elf->filename);
grub_free (elf);
if (file)
@@ -85,9 +86,14 @@ grub_elf_file (grub_file_t file, const char *filename)
if (grub_elf_check_header (elf))
goto fail;
+ elf->filename = grub_strdup (filename);
+ if (!elf->filename)
+ goto fail;
+
return elf;
fail:
+ grub_free (elf->filename);
grub_free (elf->phdrs);
grub_free (elf);
return 0;
@@ -112,420 +118,41 @@ grub_elf_open (const char *name)
/* 32-bit */
-
-int
-grub_elf_is_elf32 (grub_elf_t elf)
-{
- return elf->ehdr.ehdr32.e_ident[EI_CLASS] == ELFCLASS32;
-}
-
-static grub_err_t
-grub_elf32_load_phdrs (grub_elf_t elf, const char *filename)
-{
- grub_ssize_t phdrs_size;
-
- phdrs_size = elf->ehdr.ehdr32.e_phnum * elf->ehdr.ehdr32.e_phentsize;
-
- grub_dprintf ("elf", "Loading program headers at 0x%llx, size 0x%lx.\n",
- (unsigned long long) elf->ehdr.ehdr32.e_phoff,
- (unsigned long) phdrs_size);
-
- elf->phdrs = grub_malloc (phdrs_size);
- if (! elf->phdrs)
- return grub_errno;
-
- if ((grub_file_seek (elf->file, elf->ehdr.ehdr32.e_phoff) == (grub_off_t) -1)
- || (grub_file_read (elf->file, elf->phdrs, phdrs_size) != phdrs_size))
- {
- if (!grub_errno)
- grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
- filename);
- return grub_errno;
- }
-
- return GRUB_ERR_NONE;
-}
-
-grub_err_t
-grub_elf32_phdr_iterate (grub_elf_t elf,
- const char *filename,
- grub_elf32_phdr_iterate_hook_t hook, void *hook_arg)
-{
- Elf32_Phdr *phdrs;
- unsigned int i;
-
- if (! elf->phdrs)
- if (grub_elf32_load_phdrs (elf, filename))
- return grub_errno;
- phdrs = elf->phdrs;
-
- for (i = 0; i < elf->ehdr.ehdr32.e_phnum; i++)
- {
- Elf32_Phdr *phdr = phdrs + i;
- grub_dprintf ("elf",
- "Segment %u: type 0x%x paddr 0x%lx memsz 0x%lx "
- "filesz %lx\n",
- i, phdr->p_type,
- (unsigned long) phdr->p_paddr,
- (unsigned long) phdr->p_memsz,
- (unsigned long) phdr->p_filesz);
- if (hook (elf, phdr, hook_arg))
- break;
- }
-
- return grub_errno;
-}
-
-struct grub_elf32_size_ctx
-{
- Elf32_Addr segments_start, segments_end;
- int nr_phdrs;
- grub_uint32_t curr_align;
-};
-
-/* Run through the program headers to calculate the total memory size we
- * should claim. */
-static int
-grub_elf32_calcsize (grub_elf_t _elf __attribute__ ((unused)),
- Elf32_Phdr *phdr, void *data)
-{
- struct grub_elf32_size_ctx *ctx = data;
-
- /* Only consider loadable segments. */
- if (phdr->p_type != PT_LOAD)
- return 0;
- ctx->nr_phdrs++;
- if (phdr->p_paddr < ctx->segments_start)
- ctx->segments_start = phdr->p_paddr;
- if (phdr->p_paddr + phdr->p_memsz > ctx->segments_end)
- ctx->segments_end = phdr->p_paddr + phdr->p_memsz;
- if (ctx->curr_align < phdr->p_align)
- ctx->curr_align = phdr->p_align;
- return 0;
-}
-
-/* Calculate the amount of memory spanned by the segments. */
-grub_size_t
-grub_elf32_size (grub_elf_t elf, const char *filename,
- Elf32_Addr *base, grub_uint32_t *max_align)
-{
- struct grub_elf32_size_ctx ctx = {
- .segments_start = (Elf32_Addr) -1,
- .segments_end = 0,
- .nr_phdrs = 0,
- .curr_align = 1
- };
-
- grub_elf32_phdr_iterate (elf, filename, grub_elf32_calcsize, &ctx);
-
- if (base)
- *base = 0;
-
- if (ctx.nr_phdrs == 0)
- {
- grub_error (GRUB_ERR_BAD_OS, "no program headers present");
- return 0;
- }
-
- if (ctx.segments_end < ctx.segments_start)
- {
- /* Very bad addresses. */
- grub_error (GRUB_ERR_BAD_OS, "bad program header load addresses");
- return 0;
- }
-
- if (base)
- *base = ctx.segments_start;
- if (max_align)
- *max_align = ctx.curr_align;
- return ctx.segments_end - ctx.segments_start;
-}
-
-struct grub_elf32_load_ctx
-{
- const char *filename;
- grub_elf32_load_hook_t load_hook;
- grub_addr_t load_base;
- grub_size_t load_size;
-};
-
-static int
-grub_elf32_load_segment (grub_elf_t elf, Elf32_Phdr *phdr, void *data)
-{
- struct grub_elf32_load_ctx *ctx = data;
- grub_addr_t load_addr;
- int do_load = 1;
-
- load_addr = phdr->p_paddr;
- if (ctx->load_hook && ctx->load_hook (phdr, &load_addr, &do_load))
- return 1;
-
- if (! do_load)
- return 0;
-
- if (load_addr < ctx->load_base)
- ctx->load_base = load_addr;
-
- grub_dprintf ("elf", "Loading segment at 0x%llx, size 0x%llx\n",
- (unsigned long long) load_addr,
- (unsigned long long) phdr->p_memsz);
-
- if (grub_file_seek (elf->file, phdr->p_offset) == (grub_off_t) -1)
- return grub_errno;
-
- if (phdr->p_filesz)
- {
- grub_ssize_t read;
- read = grub_file_read (elf->file, (void *) load_addr, phdr->p_filesz);
- if (read != (grub_ssize_t) phdr->p_filesz)
- {
- /* XXX How can we free memory from `ctx->load_hook'? */
- if (!grub_errno)
- grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
- ctx->filename);
- return grub_errno;
- }
- }
-
- if (phdr->p_filesz < phdr->p_memsz)
- grub_memset ((void *) (long) (load_addr + phdr->p_filesz),
- 0, phdr->p_memsz - phdr->p_filesz);
-
- ctx->load_size += phdr->p_memsz;
-
- return 0;
-}
-
-/* Load every loadable segment into memory specified by `_load_hook'. */
-grub_err_t
-grub_elf32_load (grub_elf_t elf, const char *filename,
- grub_elf32_load_hook_t load_hook,
- grub_addr_t *base, grub_size_t *size)
-{
- struct grub_elf32_load_ctx ctx = {
- .filename = filename,
- .load_hook = load_hook,
- .load_base = (grub_addr_t) -1ULL,
- .load_size = 0
- };
- grub_err_t err;
-
- err = grub_elf32_phdr_iterate (elf, filename, grub_elf32_load_segment, &ctx);
-
- if (base)
- *base = ctx.load_base;
- if (size)
- *size = ctx.load_size;
-
- return err;
-}
+#define ehdrXX ehdr32
+#define ELFCLASSXX ELFCLASS32
+#define ElfXX_Addr Elf32_Addr
+#define grub_elfXX_size grub_elf32_size
+#define grub_elfXX_load grub_elf32_load
+#define FOR_ELFXX_PHDRS FOR_ELF32_PHDRS
+#define grub_elf_is_elfXX grub_elf_is_elf32
+#define grub_elfXX_load_phdrs grub_elf32_load_phdrs
+#define ElfXX_Phdr Elf32_Phdr
+#define grub_uintXX_t grub_uint32_t
+
+#include "elfXX.c"
+
+#undef ehdrXX
+#undef ELFCLASSXX
+#undef ElfXX_Addr
+#undef grub_elfXX_size
+#undef grub_elfXX_load
+#undef FOR_ELFXX_PHDRS
+#undef grub_elf_is_elfXX
+#undef grub_elfXX_load_phdrs
+#undef ElfXX_Phdr
+#undef grub_uintXX_t
/* 64-bit */
-
-int
-grub_elf_is_elf64 (grub_elf_t elf)
-{
- return elf->ehdr.ehdr64.e_ident[EI_CLASS] == ELFCLASS64;
-}
-
-static grub_err_t
-grub_elf64_load_phdrs (grub_elf_t elf, const char *filename)
-{
- grub_ssize_t phdrs_size;
-
- phdrs_size = elf->ehdr.ehdr64.e_phnum * elf->ehdr.ehdr64.e_phentsize;
-
- grub_dprintf ("elf", "Loading program headers at 0x%llx, size 0x%lx.\n",
- (unsigned long long) elf->ehdr.ehdr64.e_phoff,
- (unsigned long) phdrs_size);
-
- elf->phdrs = grub_malloc (phdrs_size);
- if (! elf->phdrs)
- return grub_errno;
-
- if ((grub_file_seek (elf->file, elf->ehdr.ehdr64.e_phoff) == (grub_off_t) -1)
- || (grub_file_read (elf->file, elf->phdrs, phdrs_size) != phdrs_size))
- {
- if (!grub_errno)
- grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
- filename);
- return grub_errno;
- }
-
- return GRUB_ERR_NONE;
-}
-
-grub_err_t
-grub_elf64_phdr_iterate (grub_elf_t elf,
- const char *filename,
- grub_elf64_phdr_iterate_hook_t hook, void *hook_arg)
-{
- Elf64_Phdr *phdrs;
- unsigned int i;
-
- if (! elf->phdrs)
- if (grub_elf64_load_phdrs (elf, filename))
- return grub_errno;
- phdrs = elf->phdrs;
-
- for (i = 0; i < elf->ehdr.ehdr64.e_phnum; i++)
- {
- Elf64_Phdr *phdr = phdrs + i;
- grub_dprintf ("elf",
- "Segment %u: type 0x%x paddr 0x%lx memsz 0x%lx "
- "filesz %lx\n",
- i, phdr->p_type,
- (unsigned long) phdr->p_paddr,
- (unsigned long) phdr->p_memsz,
- (unsigned long) phdr->p_filesz);
- if (hook (elf, phdr, hook_arg))
- break;
- }
-
- return grub_errno;
-}
-
-struct grub_elf64_size_ctx
-{
- Elf64_Addr segments_start, segments_end;
- int nr_phdrs;
- grub_uint64_t curr_align;
-};
-
-/* Run through the program headers to calculate the total memory size we
- * should claim. */
-static int
-grub_elf64_calcsize (grub_elf_t _elf __attribute__ ((unused)),
- Elf64_Phdr *phdr, void *data)
-{
- struct grub_elf64_size_ctx *ctx = data;
-
- /* Only consider loadable segments. */
- if (phdr->p_type != PT_LOAD)
- return 0;
- ctx->nr_phdrs++;
- if (phdr->p_paddr < ctx->segments_start)
- ctx->segments_start = phdr->p_paddr;
- if (phdr->p_paddr + phdr->p_memsz > ctx->segments_end)
- ctx->segments_end = phdr->p_paddr + phdr->p_memsz;
- if (ctx->curr_align < phdr->p_align)
- ctx->curr_align = phdr->p_align;
- return 0;
-}
-
-/* Calculate the amount of memory spanned by the segments. */
-grub_size_t
-grub_elf64_size (grub_elf_t elf, const char *filename,
- Elf64_Addr *base, grub_uint64_t *max_align)
-{
- struct grub_elf64_size_ctx ctx = {
- .segments_start = (Elf64_Addr) -1,
- .segments_end = 0,
- .nr_phdrs = 0,
- .curr_align = 1
- };
-
- grub_elf64_phdr_iterate (elf, filename, grub_elf64_calcsize, &ctx);
-
- if (base)
- *base = 0;
-
- if (ctx.nr_phdrs == 0)
- {
- grub_error (GRUB_ERR_BAD_OS, "no program headers present");
- return 0;
- }
-
- if (ctx.segments_end < ctx.segments_start)
- {
- /* Very bad addresses. */
- grub_error (GRUB_ERR_BAD_OS, "bad program header load addresses");
- return 0;
- }
-
- if (base)
- *base = ctx.segments_start;
- if (max_align)
- *max_align = ctx.curr_align;
- return ctx.segments_end - ctx.segments_start;
-}
-
-struct grub_elf64_load_ctx
-{
- const char *filename;
- grub_elf64_load_hook_t load_hook;
- grub_addr_t load_base;
- grub_size_t load_size;
-};
-
-static int
-grub_elf64_load_segment (grub_elf_t elf, Elf64_Phdr *phdr, void *data)
-{
- struct grub_elf64_load_ctx *ctx = data;
- grub_addr_t load_addr;
- int do_load = 1;
-
- load_addr = phdr->p_paddr;
- if (ctx->load_hook && ctx->load_hook (phdr, &load_addr, &do_load))
- return 1;
-
- if (! do_load)
- return 0;
-
- if (load_addr < ctx->load_base)
- ctx->load_base = load_addr;
-
- grub_dprintf ("elf", "Loading segment at 0x%llx, size 0x%llx\n",
- (unsigned long long) load_addr,
- (unsigned long long) phdr->p_memsz);
-
- if (grub_file_seek (elf->file, phdr->p_offset) == (grub_off_t) -1)
- return grub_errno;
-
- if (phdr->p_filesz)
- {
- grub_ssize_t read;
- read = grub_file_read (elf->file, (void *) load_addr, phdr->p_filesz);
- if (read != (grub_ssize_t) phdr->p_filesz)
- {
- /* XXX How can we free memory from `ctx->load_hook'? */
- if (!grub_errno)
- grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
- ctx->filename);
- return grub_errno;
- }
- }
-
- if (phdr->p_filesz < phdr->p_memsz)
- grub_memset ((void *) (long) (load_addr + phdr->p_filesz),
- 0, phdr->p_memsz - phdr->p_filesz);
-
- ctx->load_size += phdr->p_memsz;
-
- return 0;
-}
-
-/* Load every loadable segment into memory specified by `_load_hook'. */
-grub_err_t
-grub_elf64_load (grub_elf_t elf, const char *filename,
- grub_elf64_load_hook_t load_hook,
- grub_addr_t *base, grub_size_t *size)
-{
- struct grub_elf64_load_ctx ctx = {
- .filename = filename,
- .load_hook = load_hook,
- .load_base = (grub_addr_t) -1ULL,
- .load_size = 0
- };
- grub_err_t err;
-
- err = grub_elf64_phdr_iterate (elf, filename, grub_elf64_load_segment, &ctx);
-
- if (base)
- *base = ctx.load_base;
- if (size)
- *size = ctx.load_size;
-
- return err;
-}
+#define ehdrXX ehdr64
+#define ELFCLASSXX ELFCLASS64
+#define ElfXX_Addr Elf64_Addr
+#define grub_elfXX_size grub_elf64_size
+#define grub_elfXX_load grub_elf64_load
+#define FOR_ELFXX_PHDRS FOR_ELF64_PHDRS
+#define grub_elf_is_elfXX grub_elf_is_elf64
+#define grub_elfXX_load_phdrs grub_elf64_load_phdrs
+#define ElfXX_Phdr Elf64_Phdr
+#define grub_uintXX_t grub_uint64_t
+
+#include "elfXX.c"
diff --git a/grub-core/kern/elfXX.c b/grub-core/kern/elfXX.c
new file mode 100644
index 0000000..b35e235
--- /dev/null
+++ b/grub-core/kern/elfXX.c
@@ -0,0 +1,144 @@
+int
+grub_elf_is_elfXX (grub_elf_t elf)
+{
+ return elf->ehdr.ehdrXX.e_ident[EI_CLASS] == ELFCLASSXX;
+}
+
+grub_err_t
+grub_elfXX_load_phdrs (grub_elf_t elf)
+{
+ grub_ssize_t phdrs_size;
+
+ if (elf->phdrs)
+ return GRUB_ERR_NONE;
+
+ phdrs_size = elf->ehdr.ehdrXX.e_phnum * elf->ehdr.ehdrXX.e_phentsize;
+
+ grub_dprintf ("elf", "Loading program headers at 0x%llx, size 0x%lx.\n",
+ (unsigned long long) elf->ehdr.ehdrXX.e_phoff,
+ (unsigned long) phdrs_size);
+
+ elf->phdrs = grub_malloc (phdrs_size);
+ if (! elf->phdrs)
+ return grub_errno;
+
+ if ((grub_file_seek (elf->file, elf->ehdr.ehdrXX.e_phoff) == (grub_off_t) -1)
+ || (grub_file_read (elf->file, elf->phdrs, phdrs_size) != phdrs_size))
+ {
+ if (!grub_errno)
+ grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
+ elf->filename);
+ return grub_errno;
+ }
+
+ return GRUB_ERR_NONE;
+}
+
+/* Calculate the amount of memory spanned by the segments. */
+grub_size_t
+grub_elfXX_size (grub_elf_t elf,
+ ElfXX_Addr *base, grub_uintXX_t *max_align)
+{
+ ElfXX_Addr segments_start = (ElfXX_Addr) -1;
+ ElfXX_Addr segments_end = 0;
+ int nr_phdrs = 0;
+ grub_uint32_t curr_align = 1;
+ ElfXX_Phdr *phdr;
+
+ /* Run through the program headers to calculate the total memory size we
+ * should claim. */
+ FOR_ELFXX_PHDRS (elf, phdr)
+ {
+ /* Only consider loadable segments. */
+ if (phdr->p_type != PT_LOAD)
+ continue;
+ nr_phdrs++;
+ if (phdr->p_paddr < segments_start)
+ segments_start = phdr->p_paddr;
+ if (phdr->p_paddr + phdr->p_memsz > segments_end)
+ segments_end = phdr->p_paddr + phdr->p_memsz;
+ if (curr_align < phdr->p_align)
+ curr_align = phdr->p_align;
+ }
+
+ if (base)
+ *base = 0;
+
+ if (nr_phdrs == 0)
+ {
+ grub_error (GRUB_ERR_BAD_OS, "no program headers present");
+ return 0;
+ }
+
+ if (segments_end < segments_start)
+ {
+ /* Very bad addresses. */
+ grub_error (GRUB_ERR_BAD_OS, "bad program header load addresses");
+ return 0;
+ }
+
+ if (base)
+ *base = segments_start;
+ if (max_align)
+ *max_align = curr_align;
+ return segments_end - segments_start;
+}
+
+grub_err_t
+grub_elfXX_load (grub_elf_t elf, const char *filename,
+ void *load_offset, enum grub_elf_load_flags load_flags,
+ grub_addr_t *base, grub_size_t *size)
+{
+ grub_addr_t load_base = (grub_addr_t) -1ULL;
+ grub_size_t load_size = 0;
+ ElfXX_Phdr *phdr;
+
+ FOR_ELFXX_PHDRS(elf, phdr)
+ {
+ grub_addr_t load_addr;
+
+ if (phdr->p_type != PT_LOAD && !((load_flags & GRUB_ELF_LOAD_FLAGS_LOAD_PT_DYNAMIC) && phdr->p_type == PT_DYNAMIC))
+ continue;
+
+ load_addr = (grub_addr_t) phdr->p_paddr;
+ if (load_flags & GRUB_ELF_LOAD_FLAGS_28BITS)
+ load_addr &= 0xFFFFFFF;
+ load_addr += (grub_addr_t) load_offset;
+
+ if (load_addr < load_base)
+ load_base = load_addr;
+
+ grub_dprintf ("elf", "Loading segment at 0x%llx, size 0x%llx\n",
+ (unsigned long long) load_addr,
+ (unsigned long long) phdr->p_memsz);
+
+ if (grub_file_seek (elf->file, phdr->p_offset) == (grub_off_t) -1)
+ return grub_errno;
+
+ if (phdr->p_filesz)
+ {
+ grub_ssize_t read;
+ read = grub_file_read (elf->file, (void *) load_addr, phdr->p_filesz);
+ if (read != (grub_ssize_t) phdr->p_filesz)
+ {
+ if (!grub_errno)
+ grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
+ filename);
+ return grub_errno;
+ }
+ }
+
+ if (phdr->p_filesz < phdr->p_memsz)
+ grub_memset ((void *) (long) (load_addr + phdr->p_filesz),
+ 0, phdr->p_memsz - phdr->p_filesz);
+
+ load_size += phdr->p_memsz;
+ }
+
+ if (base)
+ *base = load_base;
+ if (size)
+ *size = load_size;
+
+ return grub_errno;
+}
diff --git a/grub-core/loader/i386/bsd.c b/grub-core/loader/i386/bsd.c
index 9b86158..6199609 100644
--- a/grub-core/loader/i386/bsd.c
+++ b/grub-core/loader/i386/bsd.c
@@ -1311,89 +1311,6 @@ grub_bsd_load_aout (grub_file_t file, const char *filename)
bss_size);
}
-static int
-grub_bsd_elf32_size_hook (grub_elf_t elf __attribute__ ((unused)),
- Elf32_Phdr *phdr, void *arg __attribute__ ((unused)))
-{
- Elf32_Addr paddr;
-
- if (phdr->p_type != PT_LOAD
- && phdr->p_type != PT_DYNAMIC)
- return 0;
-
- paddr = phdr->p_paddr & 0xFFFFFFF;
-
- if (paddr < kern_start)
- kern_start = paddr;
-
- if (paddr + phdr->p_memsz > kern_end)
- kern_end = paddr + phdr->p_memsz;
-
- return 0;
-}
-
-static grub_err_t
-grub_bsd_elf32_hook (Elf32_Phdr * phdr, grub_addr_t * addr, int *do_load)
-{
- Elf32_Addr paddr;
-
- if (phdr->p_type != PT_LOAD
- && phdr->p_type != PT_DYNAMIC)
- {
- *do_load = 0;
- return 0;
- }
-
- *do_load = 1;
- phdr->p_paddr &= 0xFFFFFFF;
- paddr = phdr->p_paddr;
-
- *addr = (grub_addr_t) (paddr - kern_start + (grub_uint8_t *) kern_chunk_src);
-
- return GRUB_ERR_NONE;
-}
-
-static int
-grub_bsd_elf64_size_hook (grub_elf_t elf __attribute__ ((unused)),
- Elf64_Phdr *phdr, void *arg __attribute__ ((unused)))
-{
- Elf64_Addr paddr;
-
- if (phdr->p_type != PT_LOAD
- && phdr->p_type != PT_DYNAMIC)
- return 0;
-
- paddr = phdr->p_paddr & 0xfffffff;
-
- if (paddr < kern_start)
- kern_start = paddr;
-
- if (paddr + phdr->p_memsz > kern_end)
- kern_end = paddr + phdr->p_memsz;
-
- return 0;
-}
-
-static grub_err_t
-grub_bsd_elf64_hook (Elf64_Phdr * phdr, grub_addr_t * addr, int *do_load)
-{
- Elf64_Addr paddr;
-
- if (phdr->p_type != PT_LOAD
- && phdr->p_type != PT_DYNAMIC)
- {
- *do_load = 0;
- return 0;
- }
-
- *do_load = 1;
- paddr = phdr->p_paddr & 0xfffffff;
-
- *addr = (grub_addr_t) (paddr - kern_start + (grub_uint8_t *) kern_chunk_src);
-
- return GRUB_ERR_NONE;
-}
-
static grub_err_t
grub_bsd_load_elf (grub_elf_t elf, const char *filename)
{
@@ -1405,12 +1322,29 @@ grub_bsd_load_elf (grub_elf_t elf, const char *filename)
if (grub_elf_is_elf32 (elf))
{
grub_relocator_chunk_t ch;
+ Elf32_Phdr *phdr;
entry = elf->ehdr.ehdr32.e_entry & 0xFFFFFFF;
- err = grub_elf32_phdr_iterate (elf, filename,
- grub_bsd_elf32_size_hook, NULL);
- if (err)
- return err;
+
+ FOR_ELF32_PHDRS (elf, phdr)
+ {
+ Elf32_Addr paddr;
+
+ if (phdr->p_type != PT_LOAD
+ && phdr->p_type != PT_DYNAMIC)
+ continue;
+
+ paddr = phdr->p_paddr & 0xFFFFFFF;
+
+ if (paddr < kern_start)
+ kern_start = paddr;
+
+ if (paddr + phdr->p_memsz > kern_end)
+ kern_end = paddr + phdr->p_memsz;
+ }
+
+ if (grub_errno)
+ return grub_errno;
err = grub_relocator_alloc_chunk_addr (relocator, &ch,
kern_start, kern_end - kern_start);
if (err)
@@ -1418,7 +1352,7 @@ grub_bsd_load_elf (grub_elf_t elf, const char *filename)
kern_chunk_src = get_virtual_current_address (ch);
- err = grub_elf32_load (elf, filename, grub_bsd_elf32_hook, 0, 0);
+ err = grub_elf32_load (elf, filename, (grub_uint8_t *) kern_chunk_src - kern_start, GRUB_ELF_LOAD_FLAGS_LOAD_PT_DYNAMIC | GRUB_ELF_LOAD_FLAGS_28BITS, 0, 0);
if (err)
return err;
if (kernel_type != KERNEL_TYPE_OPENBSD)
@@ -1428,6 +1362,8 @@ grub_bsd_load_elf (grub_elf_t elf, const char *filename)
}
else if (grub_elf_is_elf64 (elf))
{
+ Elf64_Phdr *phdr;
+
is_64bit = 1;
if (! grub_cpuid_has_longmode)
@@ -1445,10 +1381,25 @@ grub_bsd_load_elf (grub_elf_t elf, const char *filename)
entry_hi = 0;
}
- err = grub_elf64_phdr_iterate (elf, filename,
- grub_bsd_elf64_size_hook, NULL);
- if (err)
- return err;
+ FOR_ELF64_PHDRS (elf, phdr)
+ {
+ Elf64_Addr paddr;
+
+ if (phdr->p_type != PT_LOAD
+ && phdr->p_type != PT_DYNAMIC)
+ continue;
+
+ paddr = phdr->p_paddr & 0xFFFFFFF;
+
+ if (paddr < kern_start)
+ kern_start = paddr;
+
+ if (paddr + phdr->p_memsz > kern_end)
+ kern_end = paddr + phdr->p_memsz;
+ }
+
+ if (grub_errno)
+ return grub_errno;
grub_dprintf ("bsd", "kern_start = %lx, kern_end = %lx\n",
(unsigned long) kern_start, (unsigned long) kern_end);
@@ -1463,7 +1414,7 @@ grub_bsd_load_elf (grub_elf_t elf, const char *filename)
}
err = grub_elf64_load (elf, filename,
- grub_bsd_elf64_hook, 0, 0);
+ (grub_uint8_t *) kern_chunk_src - kern_start, GRUB_ELF_LOAD_FLAGS_LOAD_PT_DYNAMIC | GRUB_ELF_LOAD_FLAGS_28BITS, 0, 0);
if (err)
return err;
if (kernel_type != KERNEL_TYPE_OPENBSD)
diff --git a/grub-core/loader/i386/coreboot/chainloader.c b/grub-core/loader/i386/coreboot/chainloader.c
index df4e276..505aa0b 100644
--- a/grub-core/loader/i386/coreboot/chainloader.c
+++ b/grub-core/loader/i386/coreboot/chainloader.c
@@ -56,36 +56,13 @@ grub_chain_unload (void)
}
static grub_err_t
-grub_chain_elf32_hook (Elf32_Phdr * phdr, grub_addr_t * addr, int *do_load)
-{
- grub_err_t err;
- grub_relocator_chunk_t ch;
-
- if (phdr->p_type != PT_LOAD)
- {
- *do_load = 0;
- return 0;
- }
-
- *do_load = 1;
- err = grub_relocator_alloc_chunk_addr (relocator, &ch,
- phdr->p_paddr, phdr->p_memsz);
- if (err)
- return err;
-
- *addr = (grub_addr_t) get_virtual_current_address (ch);
-
- return GRUB_ERR_NONE;
-}
-
-
-static grub_err_t
grub_cmd_chain (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
grub_err_t err;
grub_file_t file;
grub_elf_t elf;
+ Elf32_Phdr *phdr;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
@@ -118,13 +95,47 @@ grub_cmd_chain (grub_command_t cmd __attribute__ ((unused)),
grub_elf_close (elf);
}
- entry = elf->ehdr.ehdr32.e_entry & 0xFFFFFF;
-
- err = grub_elf32_load (elf, argv[0], grub_chain_elf32_hook, 0, 0);
+ entry = elf->ehdr.ehdr32.e_entry;
+
+ FOR_ELF32_PHDRS(elf, phdr)
+ {
+ grub_uint8_t *load_addr;
+ grub_relocator_chunk_t ch;
+
+ if (phdr->p_type != PT_LOAD)
+ continue;
+
+ err = grub_relocator_alloc_chunk_addr (relocator, &ch,
+ phdr->p_paddr, phdr->p_memsz);
+ if (err)
+ break;
+
+ load_addr = get_virtual_current_address (ch);
+
+ if (grub_file_seek (elf->file, phdr->p_offset) == (grub_off_t) -1)
+ return grub_errno;
+
+ if (phdr->p_filesz)
+ {
+ grub_ssize_t read;
+ read = grub_file_read (elf->file, load_addr, phdr->p_filesz);
+ if (read != (grub_ssize_t) phdr->p_filesz)
+ {
+ if (!grub_errno)
+ grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
+ argv[0]);
+ break;
+ }
+ }
+
+ if (phdr->p_filesz < phdr->p_memsz)
+ grub_memset ((load_addr + phdr->p_filesz),
+ 0, phdr->p_memsz - phdr->p_filesz);
+ }
grub_elf_close (elf);
- if (err)
- return err;
+ if (grub_errno)
+ return grub_errno;
grub_loader_set (grub_chain_boot, grub_chain_unload, 0);
return GRUB_ERR_NONE;
diff --git a/grub-core/loader/mips/linux.c b/grub-core/loader/mips/linux.c
index f2cf7cc..653f8a2 100644
--- a/grub-core/loader/mips/linux.c
+++ b/grub-core/loader/mips/linux.c
@@ -144,7 +144,7 @@ grub_linux_load32 (grub_elf_t elf, const char *filename,
/* Linux's entry point incorrectly contains a virtual address. */
entry_addr = elf->ehdr.ehdr32.e_entry;
- linux_size = grub_elf32_size (elf, filename, &base, 0);
+ linux_size = grub_elf32_size (elf, &base, 0);
if (linux_size == 0)
return grub_errno;
target_addr = base;
@@ -171,22 +171,7 @@ grub_linux_load32 (grub_elf_t elf, const char *filename,
*extra_mem = playground + extraoff;
/* Now load the segments into the area we claimed. */
- auto grub_err_t offset_phdr (Elf32_Phdr *phdr, grub_addr_t *addr, int *do_load);
- grub_err_t offset_phdr (Elf32_Phdr *phdr, grub_addr_t *addr, int *do_load)
- {
- if (phdr->p_type != PT_LOAD)
- {
- *do_load = 0;
- return 0;
- }
- *do_load = 1;
-
- /* Linux's program headers incorrectly contain virtual addresses.
- * Translate those to physical, and offset to the area we claimed. */
- *addr = (grub_addr_t) (phdr->p_paddr - base + playground);
- return 0;
- }
- return grub_elf32_load (elf, filename, offset_phdr, 0, 0);
+ return grub_elf32_load (elf, filename, playground - base, GRUB_ELF_LOAD_FLAGS_NONE, 0, 0);
}
static grub_err_t
@@ -200,7 +185,7 @@ grub_linux_load64 (grub_elf_t elf, const char *filename,
/* Linux's entry point incorrectly contains a virtual address. */
entry_addr = elf->ehdr.ehdr64.e_entry;
- linux_size = grub_elf64_size (elf, filename, &base, 0);
+ linux_size = grub_elf64_size (elf, &base, 0);
if (linux_size == 0)
return grub_errno;
target_addr = base;
@@ -227,21 +212,7 @@ grub_linux_load64 (grub_elf_t elf, const char *filename,
*extra_mem = playground + extraoff;
/* Now load the segments into the area we claimed. */
- auto grub_err_t offset_phdr (Elf64_Phdr *phdr, grub_addr_t *addr, int *do_load);
- grub_err_t offset_phdr (Elf64_Phdr *phdr, grub_addr_t *addr, int *do_load)
- {
- if (phdr->p_type != PT_LOAD)
- {
- *do_load = 0;
- return 0;
- }
- *do_load = 1;
- /* Linux's program headers incorrectly contain virtual addresses.
- * Translate those to physical, and offset to the area we claimed. */
- *addr = (grub_addr_t) (phdr->p_paddr - base + playground);
- return 0;
- }
- return grub_elf64_load (elf, filename, offset_phdr, 0, 0);
+ return grub_elf64_load (elf, filename, playground - base, GRUB_ELF_LOAD_FLAGS_NONE, 0, 0);
}
static grub_err_t
diff --git a/grub-core/loader/powerpc/ieee1275/linux.c b/grub-core/loader/powerpc/ieee1275/linux.c
index c977941..9055399 100644
--- a/grub-core/loader/powerpc/ieee1275/linux.c
+++ b/grub-core/loader/powerpc/ieee1275/linux.c
@@ -179,7 +179,7 @@ grub_linux_load32 (grub_elf_t elf, const char *filename)
grub_uint32_t offset;
Elf32_Addr entry;
- linux_size = grub_elf32_size (elf, filename, &base_addr, &align);
+ linux_size = grub_elf32_size (elf, &base_addr, &align);
if (linux_size == 0)
return grub_errno;
/* Pad it; the kernel scribbles over memory beyond its load address. */
@@ -203,20 +203,7 @@ grub_linux_load32 (grub_elf_t elf, const char *filename)
linux_addr = seg_addr;
/* Now load the segments into the area we claimed. */
- auto grub_err_t offset_phdr (Elf32_Phdr *phdr, grub_addr_t *addr, int *do_load);
- grub_err_t offset_phdr (Elf32_Phdr *phdr, grub_addr_t *addr, int *do_load)
- {
- if (phdr->p_type != PT_LOAD)
- {
- *do_load = 0;
- return 0;
- }
- *do_load = 1;
-
- *addr = (phdr->p_paddr - base_addr) + seg_addr;
- return 0;
- }
- return grub_elf32_load (elf, filename, offset_phdr, 0, 0);
+ return grub_elf32_load (elf, filename, (void *) (seg_addr - base_addr), GRUB_ELF_LOAD_FLAGS_NONE, 0, 0);
}
static grub_err_t
@@ -228,7 +215,7 @@ grub_linux_load64 (grub_elf_t elf, const char *filename)
grub_uint64_t offset;
Elf64_Addr entry;
- linux_size = grub_elf64_size (elf, filename, &base_addr, &align);
+ linux_size = grub_elf64_size (elf, &base_addr, &align);
if (linux_size == 0)
return grub_errno;
/* Pad it; the kernel scribbles over memory beyond its load address. */
@@ -250,20 +237,7 @@ grub_linux_load64 (grub_elf_t elf, const char *filename)
linux_addr = seg_addr;
/* Now load the segments into the area we claimed. */
- auto grub_err_t offset_phdr (Elf64_Phdr *phdr, grub_addr_t *addr, int *do_load);
- grub_err_t offset_phdr (Elf64_Phdr *phdr, grub_addr_t *addr, int *do_load)
- {
- if (phdr->p_type != PT_LOAD)
- {
- *do_load = 0;
- return 0;
- }
- *do_load = 1;
-
- *addr = (phdr->p_paddr - base_addr) + seg_addr;
- return 0;
- }
- return grub_elf64_load (elf, filename, offset_phdr, 0, 0);
+ return grub_elf64_load (elf, filename, (void *) (grub_addr_t) (seg_addr - base_addr), GRUB_ELF_LOAD_FLAGS_NONE, 0, 0);
}
static grub_err_t
diff --git a/grub-core/loader/sparc64/ieee1275/linux.c b/grub-core/loader/sparc64/ieee1275/linux.c
index c85fcfd..d203377 100644
--- a/grub-core/loader/sparc64/ieee1275/linux.c
+++ b/grub-core/loader/sparc64/ieee1275/linux.c
@@ -261,7 +261,7 @@ grub_linux_load64 (grub_elf_t elf, const char *filename)
linux_entry = elf->ehdr.ehdr64.e_entry;
linux_addr = 0x40004000;
off = 0x4000;
- linux_size = grub_elf64_size (elf, filename, 0, 0);
+ linux_size = grub_elf64_size (elf, 0, 0);
if (linux_size == 0)
return grub_errno;
@@ -286,21 +286,7 @@ grub_linux_load64 (grub_elf_t elf, const char *filename)
base = linux_entry - off;
/* Now load the segments into the area we claimed. */
- auto grub_err_t offset_phdr (Elf64_Phdr *phdr, grub_addr_t *addr, int *do_load);
- grub_err_t offset_phdr (Elf64_Phdr *phdr, grub_addr_t *addr, int *do_load)
- {
- if (phdr->p_type != PT_LOAD)
- {
- *do_load = 0;
- return 0;
- }
- *do_load = 1;
-
- /* Adjust the program load address to linux_addr. */
- *addr = (phdr->p_paddr - base) + (linux_addr - off);
- return 0;
- }
- return grub_elf64_load (elf, filename, offset_phdr, 0, 0);
+ return grub_elf64_load (elf, filename, (void *) (linux_addr - off - base), GRUB_ELF_LOAD_FLAGS_NONE, 0, 0);
}
static grub_err_t
diff --git a/include/grub/elfload.h b/include/grub/elfload.h
index d1a8d54..f854d0b 100644
--- a/include/grub/elfload.h
+++ b/include/grub/elfload.h
@@ -33,14 +33,10 @@ struct grub_elf_file
Elf32_Ehdr ehdr32;
} ehdr;
void *phdrs;
+ char *filename;
};
typedef struct grub_elf_file *grub_elf_t;
-typedef grub_err_t (*grub_elf32_load_hook_t)
- (Elf32_Phdr *phdr, grub_addr_t *addr, int *load);
-typedef grub_err_t (*grub_elf64_load_hook_t)
- (Elf64_Phdr *phdr, grub_addr_t *addr, int *load);
-
typedef int (*grub_elf32_phdr_iterate_hook_t)
(grub_elf_t elf, Elf32_Phdr *phdr, void *arg);
typedef int (*grub_elf64_phdr_iterate_hook_t)
@@ -52,26 +48,31 @@ 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,
- const char *filename,
Elf32_Addr *, grub_uint32_t *);
+enum grub_elf_load_flags
+ {
+ GRUB_ELF_LOAD_FLAGS_NONE = 0,
+ GRUB_ELF_LOAD_FLAGS_LOAD_PT_DYNAMIC = 1,
+ GRUB_ELF_LOAD_FLAGS_28BITS = 2,
+ };
grub_err_t grub_elf32_load (grub_elf_t, const char *filename,
- grub_elf32_load_hook_t, grub_addr_t *,
+ void *load_offset, enum grub_elf_load_flags flags, grub_addr_t *,
grub_size_t *);
int grub_elf_is_elf64 (grub_elf_t);
grub_size_t grub_elf64_size (grub_elf_t,
- const char *filename,
Elf64_Addr *, grub_uint64_t *);
grub_err_t grub_elf64_load (grub_elf_t, const char *filename,
- grub_elf64_load_hook_t, grub_addr_t *,
+ void *load_offset, enum grub_elf_load_flags flags, grub_addr_t *,
grub_size_t *);
-grub_err_t
-grub_elf32_phdr_iterate (grub_elf_t elf,
- const char *filename,
- grub_elf32_phdr_iterate_hook_t hook, void *hook_arg);
-grub_err_t
-grub_elf64_phdr_iterate (grub_elf_t elf,
- const char *filename,
- grub_elf64_phdr_iterate_hook_t hook, void *hook_arg);
+grub_err_t grub_elf32_load_phdrs (grub_elf_t elf);
+grub_err_t grub_elf64_load_phdrs (grub_elf_t elf);
+
+#define FOR_ELF32_PHDRS(elf, phdr) \
+ for (grub_elf32_load_phdrs (elf), phdr = elf->phdrs; \
+ phdr && phdr < (Elf32_Phdr *) elf->phdrs + elf->ehdr.ehdr32.e_phnum; phdr++)
+#define FOR_ELF64_PHDRS(elf, phdr) \
+ for (grub_elf64_load_phdrs (elf), phdr = elf->phdrs; \
+ phdr && phdr < (Elf64_Phdr *) elf->phdrs + elf->ehdr.ehdr64.e_phnum; phdr++)
#endif /* ! GRUB_ELFLOAD_HEADER */
--
1.8.2.1
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