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Long Linux command line support. 

* grub-core/loader/i386/linux.c (GRUB_LINUX_CL_END_OFFSET): Removed.
	(maximal_cmdline_size): New variable.
	(allocate_pages): Use maximal_cmdline_size.
	(grub_cmd_linux): Set and use maximal_cmdline_size.
	* grub-core/loader/i386/pc/linux.c (GRUB_LINUX_CL_END_OFFSET): Removed.
	(allocate_pages): Use maximal_cmdline_size.
	(grub_cmd_linux): Set and use maximal_cmdline_size.
	* include/grub/i386/linux.h (GRUB_LINUX_SETUP_MOVE_SIZE): Removed.
	(linux_kernel_header): Add fields kernel_alignment, relocatable, pad
	and cmdline_size.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-05-18 09:56:33 +02:00
parent a2491e235c a06eb03ad0
commit 05caa461e8
4 changed files with 46 additions and 12 deletions
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15
ChangeLog
View File

@ -1,3 +1,18 @@
2011-05-18 Vladimir Serbinenko <phcoder@gmail.com>
Long Linux command line support.
* grub-core/loader/i386/linux.c (GRUB_LINUX_CL_END_OFFSET): Removed.
(maximal_cmdline_size): New variable.
(allocate_pages): Use maximal_cmdline_size.
(grub_cmd_linux): Set and use maximal_cmdline_size.
* grub-core/loader/i386/pc/linux.c (GRUB_LINUX_CL_END_OFFSET): Removed.
(allocate_pages): Use maximal_cmdline_size.
(grub_cmd_linux): Set and use maximal_cmdline_size.
* include/grub/i386/linux.h (GRUB_LINUX_SETUP_MOVE_SIZE): Removed.
(linux_kernel_header): Add fields kernel_alignment, relocatable, pad
and cmdline_size.
2011-05-18 Vladimir Serbinenko <phcoder@gmail.com>
2011-05-18 Colin Watson <cjwatson@ubuntu.com>

16
grub-core/loader/i386/linux.c
View File

@ -57,7 +57,6 @@ GRUB_MOD_LICENSE ("GPLv3+");
#endif
#define GRUB_LINUX_CL_OFFSET 0x1000
#define GRUB_LINUX_CL_END_OFFSET 0x2000
static grub_dl_t my_mod;
@ -74,6 +73,7 @@ static grub_uint32_t prot_mode_pages;
static grub_uint32_t initrd_pages;
static struct grub_relocator *relocator = NULL;
static void *efi_mmap_buf;
static grub_size_t maximal_cmdline_size;
#ifdef GRUB_MACHINE_EFI
static grub_efi_uintn_t efi_mmap_size;
#else
@ -189,7 +189,7 @@ allocate_pages (grub_size_t prot_size)
grub_err_t err;
/* Make sure that each size is aligned to a page boundary. */
real_size = GRUB_LINUX_CL_END_OFFSET;
real_size = GRUB_LINUX_CL_OFFSET + maximal_cmdline_size;
prot_size = page_align (prot_size);
mmap_size = find_mmap_size ();
@ -663,6 +663,14 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
goto fail;
}
if (grub_le_to_cpu16 (lh.version) >= 0x0206)
maximal_cmdline_size = grub_le_to_cpu32 (lh.cmdline_size) + 1;
else
maximal_cmdline_size = 256;
if (maximal_cmdline_size < 128)
maximal_cmdline_size = 128;
setup_sects = lh.setup_sects;
/* If SETUP_SECTS is not set, set it to the default (4). */
@ -676,7 +684,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
goto fail;
params = (struct linux_kernel_params *) real_mode_mem;
grub_memset (params, 0, GRUB_LINUX_CL_END_OFFSET);
grub_memset (params, 0, GRUB_LINUX_CL_OFFSET + maximal_cmdline_size);
grub_memcpy (&params->setup_sects, &lh.setup_sects, sizeof (lh) - 0x1F1);
params->ps_mouse = params->padding10 = 0;
@ -871,7 +879,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
grub_create_loader_cmdline (argc, argv,
(char *)real_mode_mem + GRUB_LINUX_CL_OFFSET
+ sizeof (LINUX_IMAGE) - 1,
GRUB_LINUX_CL_END_OFFSET - GRUB_LINUX_CL_OFFSET
maximal_cmdline_size
- (sizeof (LINUX_IMAGE) - 1));
len = prot_size;

22
grub-core/loader/i386/pc/linux.c
View File

@ -39,7 +39,6 @@
GRUB_MOD_LICENSE ("GPLv3+");
#define GRUB_LINUX_CL_OFFSET 0x9000
#define GRUB_LINUX_CL_END_OFFSET 0x90FF
static grub_dl_t my_mod;
@ -49,6 +48,7 @@ static struct grub_relocator *relocator = NULL;
static grub_addr_t grub_linux_real_target;
static char *grub_linux_real_chunk;
static grub_size_t grub_linux16_prot_size;
static grub_size_t maximal_cmdline_size;
static grub_err_t
grub_linux16_boot (void)
@ -128,15 +128,20 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
setup_sects = lh.setup_sects;
linux_mem_size = 0;
maximal_cmdline_size = 256;
if (lh.header == grub_cpu_to_le32 (GRUB_LINUX_MAGIC_SIGNATURE)
&& grub_le_to_cpu16 (lh.version) >= 0x0200)
{
grub_linux_is_bzimage = (lh.loadflags & GRUB_LINUX_FLAG_BIG_KERNEL);
lh.type_of_loader = GRUB_LINUX_BOOT_LOADER_TYPE;
if (grub_le_to_cpu16 (lh.version) >= 0x0206)
maximal_cmdline_size = grub_le_to_cpu32 (lh.cmdline_size) + 1;
/* Put the real mode part at as a high location as possible. */
grub_linux_real_target = grub_mmap_get_lower ()
- GRUB_LINUX_SETUP_MOVE_SIZE;
- (GRUB_LINUX_CL_OFFSET + maximal_cmdline_size);
/* But it must not exceed the traditional area. */
if (grub_linux_real_target > GRUB_LINUX_OLD_REAL_MODE_ADDR)
grub_linux_real_target = GRUB_LINUX_OLD_REAL_MODE_ADDR;
@ -153,7 +158,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
{
lh.cl_magic = grub_cpu_to_le16 (GRUB_LINUX_CL_MAGIC);
lh.cl_offset = grub_cpu_to_le16 (GRUB_LINUX_CL_OFFSET);
lh.setup_move_size = grub_cpu_to_le16 (GRUB_LINUX_SETUP_MOVE_SIZE);
lh.setup_move_size = grub_cpu_to_le16 (GRUB_LINUX_CL_OFFSET
+ maximal_cmdline_size);
}
}
else
@ -185,12 +191,13 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
goto fail;
}
if (grub_linux_real_target + GRUB_LINUX_SETUP_MOVE_SIZE
if (grub_linux_real_target + GRUB_LINUX_CL_OFFSET + maximal_cmdline_size
> grub_mmap_get_lower ())
{
grub_error (GRUB_ERR_OUT_OF_RANGE,
"too small lower memory (0x%x > 0x%x)",
grub_linux_real_target + GRUB_LINUX_SETUP_MOVE_SIZE,
grub_linux_real_target + GRUB_LINUX_CL_OFFSET
+ maximal_cmdline_size,
(int) grub_mmap_get_lower ());
goto fail;
}
@ -263,7 +270,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
grub_relocator_chunk_t ch;
err = grub_relocator_alloc_chunk_addr (relocator, &ch,
grub_linux_real_target,
GRUB_LINUX_SETUP_MOVE_SIZE);
GRUB_LINUX_CL_OFFSET
+ maximal_cmdline_size);
if (err)
return err;
grub_linux_real_chunk = get_virtual_current_address (ch);
@ -294,7 +302,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
grub_create_loader_cmdline (argc, argv,
(char *)grub_linux_real_chunk
+ GRUB_LINUX_CL_OFFSET + sizeof (LINUX_IMAGE) - 1,
GRUB_LINUX_CL_END_OFFSET - GRUB_LINUX_CL_OFFSET
maximal_cmdline_size
- (sizeof (LINUX_IMAGE) - 1));
if (grub_linux_is_bzimage)

5
include/grub/i386/linux.h
View File

@ -41,7 +41,6 @@
#define GRUB_LINUX_VID_MODE_ASK 0xFFFD
#define GRUB_LINUX_VID_MODE_VESA_START 0x0300
#define GRUB_LINUX_SETUP_MOVE_SIZE 0x9100
#define GRUB_LINUX_CL_MAGIC 0xA33F
#ifdef __x86_64__
@ -130,6 +129,10 @@ struct linux_kernel_header
grub_uint16_t pad1; /* Unused */
grub_uint32_t cmd_line_ptr; /* Points to the kernel command line */
grub_uint32_t initrd_addr_max; /* Highest address for initrd */
grub_uint32_t kernel_alignment;
grub_uint8_t relocatable;
grub_uint8_t pad[3];
grub_uint32_t cmdline_size;
} __attribute__ ((packed));
/* Boot parameters for Linux based on 2.6.12. This is used by the setup