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
commit
05caa461e8
4 changed files with 46 additions and 12 deletions
15
ChangeLog
15
ChangeLog
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@ -1,3 +1,18 @@
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2011-05-18 Vladimir Serbinenko <phcoder@gmail.com>
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Long Linux command line support.
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* grub-core/loader/i386/linux.c (GRUB_LINUX_CL_END_OFFSET): Removed.
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(maximal_cmdline_size): New variable.
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(allocate_pages): Use maximal_cmdline_size.
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(grub_cmd_linux): Set and use maximal_cmdline_size.
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* grub-core/loader/i386/pc/linux.c (GRUB_LINUX_CL_END_OFFSET): Removed.
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(allocate_pages): Use maximal_cmdline_size.
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(grub_cmd_linux): Set and use maximal_cmdline_size.
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* include/grub/i386/linux.h (GRUB_LINUX_SETUP_MOVE_SIZE): Removed.
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(linux_kernel_header): Add fields kernel_alignment, relocatable, pad
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and cmdline_size.
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2011-05-18 Vladimir Serbinenko <phcoder@gmail.com>
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2011-05-18 Colin Watson <cjwatson@ubuntu.com>
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@ -57,7 +57,6 @@ GRUB_MOD_LICENSE ("GPLv3+");
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#endif
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#define GRUB_LINUX_CL_OFFSET 0x1000
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#define GRUB_LINUX_CL_END_OFFSET 0x2000
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static grub_dl_t my_mod;
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@ -74,6 +73,7 @@ static grub_uint32_t prot_mode_pages;
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static grub_uint32_t initrd_pages;
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static struct grub_relocator *relocator = NULL;
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static void *efi_mmap_buf;
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static grub_size_t maximal_cmdline_size;
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#ifdef GRUB_MACHINE_EFI
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static grub_efi_uintn_t efi_mmap_size;
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#else
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@ -189,7 +189,7 @@ allocate_pages (grub_size_t prot_size)
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grub_err_t err;
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/* Make sure that each size is aligned to a page boundary. */
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real_size = GRUB_LINUX_CL_END_OFFSET;
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real_size = GRUB_LINUX_CL_OFFSET + maximal_cmdline_size;
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prot_size = page_align (prot_size);
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mmap_size = find_mmap_size ();
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@ -663,6 +663,14 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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goto fail;
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}
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if (grub_le_to_cpu16 (lh.version) >= 0x0206)
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maximal_cmdline_size = grub_le_to_cpu32 (lh.cmdline_size) + 1;
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else
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maximal_cmdline_size = 256;
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if (maximal_cmdline_size < 128)
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maximal_cmdline_size = 128;
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setup_sects = lh.setup_sects;
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/* If SETUP_SECTS is not set, set it to the default (4). */
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@ -676,7 +684,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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goto fail;
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params = (struct linux_kernel_params *) real_mode_mem;
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grub_memset (params, 0, GRUB_LINUX_CL_END_OFFSET);
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grub_memset (params, 0, GRUB_LINUX_CL_OFFSET + maximal_cmdline_size);
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grub_memcpy (¶ms->setup_sects, &lh.setup_sects, sizeof (lh) - 0x1F1);
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params->ps_mouse = params->padding10 = 0;
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@ -871,7 +879,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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grub_create_loader_cmdline (argc, argv,
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(char *)real_mode_mem + GRUB_LINUX_CL_OFFSET
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+ sizeof (LINUX_IMAGE) - 1,
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GRUB_LINUX_CL_END_OFFSET - GRUB_LINUX_CL_OFFSET
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maximal_cmdline_size
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- (sizeof (LINUX_IMAGE) - 1));
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len = prot_size;
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@ -39,7 +39,6 @@
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GRUB_MOD_LICENSE ("GPLv3+");
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#define GRUB_LINUX_CL_OFFSET 0x9000
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#define GRUB_LINUX_CL_END_OFFSET 0x90FF
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static grub_dl_t my_mod;
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@ -49,6 +48,7 @@ static struct grub_relocator *relocator = NULL;
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static grub_addr_t grub_linux_real_target;
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static char *grub_linux_real_chunk;
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static grub_size_t grub_linux16_prot_size;
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static grub_size_t maximal_cmdline_size;
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static grub_err_t
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grub_linux16_boot (void)
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@ -128,15 +128,20 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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setup_sects = lh.setup_sects;
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linux_mem_size = 0;
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maximal_cmdline_size = 256;
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if (lh.header == grub_cpu_to_le32 (GRUB_LINUX_MAGIC_SIGNATURE)
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&& grub_le_to_cpu16 (lh.version) >= 0x0200)
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{
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grub_linux_is_bzimage = (lh.loadflags & GRUB_LINUX_FLAG_BIG_KERNEL);
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lh.type_of_loader = GRUB_LINUX_BOOT_LOADER_TYPE;
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if (grub_le_to_cpu16 (lh.version) >= 0x0206)
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maximal_cmdline_size = grub_le_to_cpu32 (lh.cmdline_size) + 1;
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/* Put the real mode part at as a high location as possible. */
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grub_linux_real_target = grub_mmap_get_lower ()
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- GRUB_LINUX_SETUP_MOVE_SIZE;
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- (GRUB_LINUX_CL_OFFSET + maximal_cmdline_size);
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/* But it must not exceed the traditional area. */
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if (grub_linux_real_target > GRUB_LINUX_OLD_REAL_MODE_ADDR)
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grub_linux_real_target = GRUB_LINUX_OLD_REAL_MODE_ADDR;
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@ -153,7 +158,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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{
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lh.cl_magic = grub_cpu_to_le16 (GRUB_LINUX_CL_MAGIC);
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lh.cl_offset = grub_cpu_to_le16 (GRUB_LINUX_CL_OFFSET);
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lh.setup_move_size = grub_cpu_to_le16 (GRUB_LINUX_SETUP_MOVE_SIZE);
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lh.setup_move_size = grub_cpu_to_le16 (GRUB_LINUX_CL_OFFSET
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+ maximal_cmdline_size);
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}
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}
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else
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@ -185,12 +191,13 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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goto fail;
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}
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if (grub_linux_real_target + GRUB_LINUX_SETUP_MOVE_SIZE
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if (grub_linux_real_target + GRUB_LINUX_CL_OFFSET + maximal_cmdline_size
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> grub_mmap_get_lower ())
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{
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grub_error (GRUB_ERR_OUT_OF_RANGE,
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"too small lower memory (0x%x > 0x%x)",
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grub_linux_real_target + GRUB_LINUX_SETUP_MOVE_SIZE,
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grub_linux_real_target + GRUB_LINUX_CL_OFFSET
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+ maximal_cmdline_size,
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(int) grub_mmap_get_lower ());
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goto fail;
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}
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@ -263,7 +270,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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grub_relocator_chunk_t ch;
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err = grub_relocator_alloc_chunk_addr (relocator, &ch,
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grub_linux_real_target,
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GRUB_LINUX_SETUP_MOVE_SIZE);
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GRUB_LINUX_CL_OFFSET
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+ maximal_cmdline_size);
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if (err)
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return err;
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grub_linux_real_chunk = get_virtual_current_address (ch);
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@ -294,7 +302,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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grub_create_loader_cmdline (argc, argv,
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(char *)grub_linux_real_chunk
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+ GRUB_LINUX_CL_OFFSET + sizeof (LINUX_IMAGE) - 1,
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GRUB_LINUX_CL_END_OFFSET - GRUB_LINUX_CL_OFFSET
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maximal_cmdline_size
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- (sizeof (LINUX_IMAGE) - 1));
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if (grub_linux_is_bzimage)
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@ -41,7 +41,6 @@
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#define GRUB_LINUX_VID_MODE_ASK 0xFFFD
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#define GRUB_LINUX_VID_MODE_VESA_START 0x0300
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#define GRUB_LINUX_SETUP_MOVE_SIZE 0x9100
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#define GRUB_LINUX_CL_MAGIC 0xA33F
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#ifdef __x86_64__
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@ -130,6 +129,10 @@ struct linux_kernel_header
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grub_uint16_t pad1; /* Unused */
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grub_uint32_t cmd_line_ptr; /* Points to the kernel command line */
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grub_uint32_t initrd_addr_max; /* Highest address for initrd */
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grub_uint32_t kernel_alignment;
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grub_uint8_t relocatable;
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grub_uint8_t pad[3];
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grub_uint32_t cmdline_size;
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} __attribute__ ((packed));
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/* Boot parameters for Linux based on 2.6.12. This is used by the setup
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