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2009-03-11 Robert Millan <rmh@aybabtu.com>

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* loader/i386/multiboot.c (code_size): New variable.
        (grub_multiboot): Define offsets by adding to `code_size' rather
        than substracting from `grub_multiboot_payload_size'.  Provide
        4-byte alignment to MBI and others by increasing
        `boot_loader_name_length' appropiately.

        * loader/i386/multiboot_elfxx.c
        (CONCAT(grub_multiboot_load_elf, XX)): Initialize `code_size'.
This commit is contained in:
robertmh 2009-03-10 23:47:51 +00:00
parent 6377ef3a1d
commit 1ca7fc96f7
3 changed files with 32 additions and 15 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2009-03-11 Robert Millan <rmh@aybabtu.com>
* loader/i386/multiboot.c (code_size): New variable.
(grub_multiboot): Define offsets by adding to `code_size' rather
than substracting from `grub_multiboot_payload_size'. Provide
4-byte alignment to MBI and others by increasing
`boot_loader_name_length' appropiately.
* loader/i386/multiboot_elfxx.c
(CONCAT(grub_multiboot_load_elf, XX)): Initialize `code_size'.
2009-03-09 Felix Zielcke <fzielcke@z-51.de> 2009-03-09 Felix Zielcke <fzielcke@z-51.de>
* conf/powerpc-ieee1275.rmk (grub_emu_SOURCES): Remove duplicated * conf/powerpc-ieee1275.rmk (grub_emu_SOURCES): Remove duplicated

27
loader/i386/multiboot.c
View file

@ -47,7 +47,8 @@ extern grub_dl_t my_mod;
static struct grub_multiboot_info *mbi, *mbi_dest; static struct grub_multiboot_info *mbi, *mbi_dest;
static grub_addr_t entry; static grub_addr_t entry;
static char *playground = NULL; static char *playground;
static grub_size_t code_size;
static grub_err_t static grub_err_t
grub_multiboot_boot (void) grub_multiboot_boot (void)
@ -259,16 +260,16 @@ grub_multiboot (int argc, char *argv[])
boot_loader_name_length = sizeof(PACKAGE_STRING); boot_loader_name_length = sizeof(PACKAGE_STRING);
#define cmdline_addr(x) ((void *) ((x) + grub_multiboot_payload_size - mmap_length - sizeof (struct grub_multiboot_info) - boot_loader_name_length - cmdline_length)) #define cmdline_addr(x) ((void *) ((x) + code_size))
#define boot_loader_name_addr(x) \ #define boot_loader_name_addr(x) \
((void *) ((x) + grub_multiboot_payload_size - mmap_length - sizeof (struct grub_multiboot_info) - boot_loader_name_length)) ((void *) ((x) + code_size + cmdline_length))
#define mbi_addr(x) ((void *) ((x) + grub_multiboot_payload_size - mmap_length - sizeof (struct grub_multiboot_info))) #define mbi_addr(x) ((void *) ((x) + code_size + cmdline_length + boot_loader_name_length))
#define mmap_addr(x) ((void *) ((x) + grub_multiboot_payload_size - mmap_length)) #define mmap_addr(x) ((void *) ((x) + code_size + cmdline_length + boot_loader_name_length + sizeof (struct grub_multiboot_info)))
/* This provides alignment for the MBI, the memory map and the backward relocator. */ grub_multiboot_payload_size = cmdline_length
boot_loader_name_length += (ALIGN_UP (mbi_addr (0), 4) - (unsigned long) mbi_addr (0)); /* boot_loader_name_length might need to grow for mbi,etc to be aligned (see below) */
+ boot_loader_name_length + 3
grub_multiboot_payload_size = cmdline_length + boot_loader_name_length + sizeof (struct grub_multiboot_info) + mmap_length; + sizeof (struct grub_multiboot_info) + mmap_length;
if (header->flags & MULTIBOOT_AOUT_KLUDGE) if (header->flags & MULTIBOOT_AOUT_KLUDGE)
{ {
@ -278,11 +279,12 @@ grub_multiboot (int argc, char *argv[])
header->load_end_addr - header->load_addr); header->load_end_addr - header->load_addr);
if (header->bss_end_addr) if (header->bss_end_addr)
grub_multiboot_payload_size += (header->bss_end_addr - header->load_addr); code_size = (header->bss_end_addr - header->load_addr);
else else
grub_multiboot_payload_size += load_size; code_size = load_size;
grub_multiboot_payload_dest = header->load_addr; grub_multiboot_payload_dest = header->load_addr;
grub_multiboot_payload_size += code_size;
playground = grub_malloc (RELOCATOR_SIZEOF(forward) + grub_multiboot_payload_size + RELOCATOR_SIZEOF(backward)); playground = grub_malloc (RELOCATOR_SIZEOF(forward) + grub_multiboot_payload_size + RELOCATOR_SIZEOF(backward));
if (! playground) if (! playground)
goto fail; goto fail;
@ -306,6 +308,9 @@ grub_multiboot (int argc, char *argv[])
else if (grub_multiboot_load_elf (file, buffer) != GRUB_ERR_NONE) else if (grub_multiboot_load_elf (file, buffer) != GRUB_ERR_NONE)
goto fail; goto fail;
/* This provides alignment for the MBI, the memory map and the backward relocator. */
boot_loader_name_length += (0x04 - ((unsigned long) mbi_addr (grub_multiboot_payload_dest) & 0x03));
mbi = mbi_addr (grub_multiboot_payload_orig); mbi = mbi_addr (grub_multiboot_payload_orig);
mbi_dest = mbi_addr (grub_multiboot_payload_dest); mbi_dest = mbi_addr (grub_multiboot_payload_dest);
grub_memset (mbi, 0, sizeof (struct grub_multiboot_info)); grub_memset (mbi, 0, sizeof (struct grub_multiboot_info));

3
loader/i386/multiboot_elfxx.c
View file

@ -88,9 +88,10 @@ CONCAT(grub_multiboot_load_elf, XX) (grub_file_t file, void *buffer)
if (phdr(i)->p_paddr > phdr(highest_segment)->p_paddr) if (phdr(i)->p_paddr > phdr(highest_segment)->p_paddr)
highest_segment = i; highest_segment = i;
} }
grub_multiboot_payload_size += (phdr(highest_segment)->p_paddr + phdr(highest_segment)->p_memsz) - phdr(lowest_segment)->p_paddr; code_size = (phdr(highest_segment)->p_paddr + phdr(highest_segment)->p_memsz) - phdr(lowest_segment)->p_paddr;
grub_multiboot_payload_dest = phdr(lowest_segment)->p_paddr; grub_multiboot_payload_dest = phdr(lowest_segment)->p_paddr;
grub_multiboot_payload_size += code_size;
playground = grub_malloc (RELOCATOR_SIZEOF(forward) + grub_multiboot_payload_size + RELOCATOR_SIZEOF(backward)); playground = grub_malloc (RELOCATOR_SIZEOF(forward) + grub_multiboot_payload_size + RELOCATOR_SIZEOF(backward));
if (! playground) if (! playground)
return grub_errno; return grub_errno;