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* grub-core/loader/multiboot_mbi2.c (grub_multiboot_add_elfsyms):

Browse source 
Reserve alignment invariants.
	(grub_multiboot_load): Likewise.
	(retrieve_video_parameters): Likewise.
	(grub_multiboot_make_mbi): Likewise.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-12-13 16:22:44 +01:00
parent c2e777777b
commit 0c6087a8c9
2 changed files with 60 additions and 26 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2011-12-13 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/loader/multiboot_mbi2.c (grub_multiboot_add_elfsyms):
Reserve alignment invariants.
(grub_multiboot_load): Likewise.
(retrieve_video_parameters): Likewise.
(grub_multiboot_make_mbi): Likewise.
2011-12-13 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/loader/i386/xnu.c (grub_xnu_devprop_remove_property): Fix

78
grub-core/loader/multiboot_mbi2.c
View file

@ -78,7 +78,7 @@ grub_multiboot_add_elfsyms (grub_size_t num, grub_size_t entsize,
grub_err_t
grub_multiboot_load (grub_file_t file)
{
char *buffer;
grub_properly_aligned_t *buffer;
grub_ssize_t len;
struct multiboot_header *header;
grub_err_t err;
@ -101,11 +101,13 @@ grub_multiboot_load (grub_file_t file)
return grub_error (GRUB_ERR_BAD_OS, "file too small");
}
COMPILE_TIME_ASSERT (MULTIBOOT_HEADER_ALIGN % 4 == 0);
/* Look for the multiboot header in the buffer. The header should
be at least 12 bytes and aligned on a 4-byte boundary. */
for (header = (struct multiboot_header *) buffer;
((char *) header <= buffer + len - 12) || (header = 0);
header = (struct multiboot_header *) ((char *) header + MULTIBOOT_HEADER_ALIGN))
((char *) header <= (char *) buffer + len - 12) || (header = 0);
header = (struct multiboot_header *) ((grub_uint32_t *) header + MULTIBOOT_HEADER_ALIGN / 4))
{
if (header->magic == MULTIBOOT_HEADER_MAGIC
&& !(header->magic + header->architecture
@ -120,9 +122,11 @@ grub_multiboot_load (grub_file_t file)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no multiboot header found");
}
COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN % 4 == 0);
for (tag = (struct multiboot_header_tag *) (header + 1);
tag->type != MULTIBOOT_TAG_TYPE_END;
tag = (struct multiboot_header_tag *) ((char *) tag + tag->size))
tag = (struct multiboot_header_tag *) ((grub_uint32_t *) tag + ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN) / 4))
switch (tag->type)
{
case MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST:
@ -208,7 +212,7 @@ grub_multiboot_load (grub_file_t file)
if (addr_tag)
{
int offset = ((char *) header - buffer -
int offset = ((char *) header - (char *) buffer -
(addr_tag->header_addr - addr_tag->load_addr));
int load_size = ((addr_tag->load_end_addr == 0) ? file->size - offset :
addr_tag->load_end_addr - addr_tag->load_addr);
@ -415,7 +419,7 @@ fill_vbe_tag (struct multiboot_tag_vbe *tag)
#endif
static grub_err_t
retrieve_video_parameters (grub_uint8_t **ptrorig)
retrieve_video_parameters (grub_properly_aligned_t **ptrorig)
{
grub_err_t err;
struct grub_video_mode_info mode_info;
@ -493,7 +497,8 @@ retrieve_video_parameters (grub_uint8_t **ptrorig)
tag->common.framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT;
tag->common.size = sizeof (tag->common);
tag->common.reserved = 0;
*ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN);
*ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
return GRUB_ERR_NONE;
}
@ -508,7 +513,8 @@ retrieve_video_parameters (grub_uint8_t **ptrorig)
fill_vbe_tag (tag_vbe);
*ptrorig += ALIGN_UP (tag_vbe->size, MULTIBOOT_TAG_ALIGN);
*ptrorig += ALIGN_UP (tag_vbe->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
#endif
@ -559,7 +565,8 @@ retrieve_video_parameters (grub_uint8_t **ptrorig)
tag->common.size = sizeof (struct multiboot_tag_framebuffer_common) + 6;
}
*ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN);
*ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
return GRUB_ERR_NONE;
}
@ -567,14 +574,16 @@ retrieve_video_parameters (grub_uint8_t **ptrorig)
grub_err_t
grub_multiboot_make_mbi (grub_uint32_t *target)
{
grub_uint8_t *ptrorig;
grub_uint8_t *mbistart;
grub_properly_aligned_t *ptrorig;
grub_properly_aligned_t *mbistart;
grub_err_t err;
grub_size_t bufsize;
grub_relocator_chunk_t ch;
bufsize = grub_multiboot_get_mbi_size ();
COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN % sizeof (grub_properly_aligned_t) == 0);
err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
0, 0xffffffff - bufsize,
bufsize, MULTIBOOT_TAG_ALIGN,
@ -592,14 +601,19 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
#endif
mbistart = ptrorig;
ptrorig += 2 * sizeof (grub_uint32_t);
COMPILE_TIME_ASSERT ((2 * sizeof (grub_uint32_t))
% sizeof (grub_properly_aligned_t) == 0);
COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN
% sizeof (grub_properly_aligned_t) == 0);
ptrorig += (2 * sizeof (grub_uint32_t)) / sizeof (grub_properly_aligned_t);
{
struct multiboot_tag_string *tag = (struct multiboot_tag_string *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_CMDLINE;
tag->size = sizeof (struct multiboot_tag_string) + cmdline_size;
grub_memcpy (tag->string, cmdline, cmdline_size);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
{
@ -607,7 +621,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->type = MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME;
tag->size = sizeof (struct multiboot_tag_string) + sizeof (PACKAGE_STRING);
grub_memcpy (tag->string, PACKAGE_STRING, sizeof (PACKAGE_STRING));
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
#ifdef GRUB_MACHINE_PCBIOS
@ -630,7 +645,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->cseg_16_len = info.cseg_16_len;
tag->version = info.version;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
}
#endif
@ -648,14 +664,16 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->mod_start = cur->start;
tag->mod_end = tag->mod_start + cur->size;
grub_memcpy (tag->cmdline, cur->cmdline, cur->cmdline_size);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
}
{
struct multiboot_tag_mmap *tag = (struct multiboot_tag_mmap *) ptrorig;
grub_fill_multiboot_mmap (tag);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
{
@ -668,7 +686,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->num = elf_sec_num;
tag->entsize = elf_sec_entsize;
tag->shndx = elf_sec_shstrndx;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
{
@ -680,7 +699,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
/* Convert from bytes to kilobytes. */
tag->mem_lower = grub_mmap_get_lower () / 1024;
tag->mem_upper = grub_mmap_get_upper () / 1024;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
if (bootdev_set)
@ -693,7 +713,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->biosdev = biosdev;
tag->slice = slice;
tag->part = part;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
{
@ -711,7 +732,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->type = MULTIBOOT_TAG_TYPE_EFI64;
tag->size = sizeof (*tag);
tag->pointer = (grub_addr_t) grub_efi_system_table;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
#endif
@ -721,7 +743,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->type = MULTIBOOT_TAG_TYPE_EFI32;
tag->size = sizeof (*tag);
tag->pointer = (grub_addr_t) grub_efi_system_table;
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
#endif
@ -735,7 +758,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->type = MULTIBOOT_TAG_TYPE_ACPI_OLD;
tag->size = sizeof (*tag) + sizeof (*a);
grub_memcpy (tag->rsdp, a, sizeof (*a));
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
}
@ -748,7 +772,8 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
tag->type = MULTIBOOT_TAG_TYPE_ACPI_NEW;
tag->size = sizeof (*tag) + a->length;
grub_memcpy (tag->rsdp, a, a->length);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
}
#endif
@ -757,10 +782,11 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
struct multiboot_tag *tag = (struct multiboot_tag *) ptrorig;
tag->type = MULTIBOOT_TAG_TYPE_END;
tag->size = sizeof (struct multiboot_tag);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
/ sizeof (grub_properly_aligned_t);
}
((grub_uint32_t *) mbistart)[0] = ptrorig - mbistart;
((grub_uint32_t *) mbistart)[0] = (char *) ptrorig - (char *) mbistart;
((grub_uint32_t *) mbistart)[1] = 0;
return GRUB_ERR_NONE;