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Diffstat (limited to 'kexec/arch/i386/kexec-mb2-x86.c')
-rw-r--r--kexec/arch/i386/kexec-mb2-x86.c616
1 files changed, 616 insertions, 0 deletions
diff --git a/kexec/arch/i386/kexec-mb2-x86.c b/kexec/arch/i386/kexec-mb2-x86.c
new file mode 100644
index 0000000..0d2e93b
--- /dev/null
+++ b/kexec/arch/i386/kexec-mb2-x86.c
@@ -0,0 +1,616 @@
+/*
+ * kexec-mb2-x86.c
+ *
+ * multiboot2 support for kexec to boot xen.
+ *
+ * Copyright (C) 2019 Varad Gautam (vrd at amazon.de), Amazon.com, Inc. or its affiliates.
+ *
+ * Parts based on GNU GRUB, Copyright (C) 2000 Free Software Foundation, Inc
+ * Parts taken from kexec-multiboot-x86.c, Eric Biederman (ebiederm@xmission.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <elf.h>
+#include <boot/elf_boot.h>
+#include <ip_checksum.h>
+#include "../../kexec.h"
+#include "../../kexec-elf.h"
+#include "kexec-x86.h"
+#include "../../kexec-syscall.h"
+#include "../../kexec-xen.h"
+#include <arch/options.h>
+
+/* From GNU GRUB */
+#include <x86/multiboot2.h>
+#include <x86/mb_info.h>
+
+/* Framebuffer */
+#include <sys/ioctl.h>
+#include <linux/fb.h>
+
+extern struct arch_options_t arch_options;
+
+/* Static storage */
+static char headerbuf[MULTIBOOT_SEARCH];
+static struct multiboot_header *mbh = NULL;
+struct multiboot2_header_info {
+ struct multiboot_header_tag_information_request *request_tag;
+ struct multiboot_header_tag_address *addr_tag;
+ struct multiboot_header_tag_entry_address *entry_addr_tag;
+ struct multiboot_header_tag_console_flags *console_tag;
+ struct multiboot_header_tag_framebuffer *fb_tag;
+ struct multiboot_header_tag_module_align *mod_align_tag;
+ struct multiboot_header_tag_relocatable *rel_tag;
+} mhi;
+
+#define ALIGN_UP(addr, align) \
+ ((addr + (typeof (addr)) align - 1) & ~((typeof (addr)) align - 1))
+
+int multiboot2_x86_probe(const char *buf, off_t buf_len)
+/* Is it a good idea to try booting this file? */
+{
+ int i, len;
+
+ /* First of all, check that this is an ELF file for either x86 or x86-64 */
+ i = elf_x86_any_probe(buf, buf_len, CORE_TYPE_UNDEF);
+ if (i < 0)
+ return i;
+
+ /* Now look for a multiboot header. */
+ len = MULTIBOOT_SEARCH;
+ if (len > buf_len)
+ len = buf_len;
+
+ memcpy(headerbuf, buf, len);
+ if (len < sizeof(struct multiboot_header)) {
+ /* Short file */
+ return -1;
+ }
+ for (mbh = (struct multiboot_header *) headerbuf;
+ ((char *) mbh <= (char *) headerbuf + len - sizeof(struct multiboot_header));
+ mbh = (struct multiboot_header *) ((char *) mbh + MULTIBOOT_HEADER_ALIGN)) {
+ if (mbh->magic == MULTIBOOT2_HEADER_MAGIC
+ && !((mbh->magic+mbh->architecture+mbh->header_length+mbh->checksum) & 0xffffffff)) {
+ /* Found multiboot header. */
+ return 0;
+ }
+ }
+ /* Not multiboot */
+ return -1;
+}
+
+void multiboot2_x86_usage(void)
+/* Multiboot-specific options */
+{
+ printf(" --command-line=STRING Set the kernel command line to STRING.\n");
+ printf(" --reuse-cmdline Use kernel command line from running system.\n");
+ printf(" --module=\"MOD arg1 arg2...\" Load module MOD with command-line \"arg1...\"\n");
+ printf(" (can be used multiple times).\n");
+}
+
+static size_t
+multiboot2_get_mbi_size(int ranges, int cmdline_size, int modcount, int modcmd_size)
+{
+ size_t mbi_size;
+
+ mbi_size = (2 * sizeof (uint32_t) /* u32 total_size, u32 reserved */
+ + ALIGN_UP (sizeof (struct multiboot_tag_basic_meminfo), MULTIBOOT_TAG_ALIGN)
+ + ALIGN_UP ((sizeof (struct multiboot_tag_mmap)
+ + ranges * sizeof (struct multiboot_mmap_entry)), MULTIBOOT_TAG_ALIGN)
+ + (sizeof (struct multiboot_tag_string)
+ + ALIGN_UP (cmdline_size, MULTIBOOT_TAG_ALIGN))
+ + (sizeof (struct multiboot_tag_string)
+ + ALIGN_UP (strlen(BOOTLOADER " " BOOTLOADER_VERSION) + 1, MULTIBOOT_TAG_ALIGN))
+ + (modcount * sizeof (struct multiboot_tag_module) + modcmd_size))
+ + sizeof (struct multiboot_tag); /* end tag */
+
+ if (mhi.rel_tag)
+ mbi_size += ALIGN_UP (sizeof (struct multiboot_tag_load_base_addr), MULTIBOOT_TAG_ALIGN);
+
+ if (mhi.fb_tag)
+ mbi_size += ALIGN_UP (sizeof (struct multiboot_tag_framebuffer), MULTIBOOT_TAG_ALIGN);
+
+ return mbi_size;
+}
+
+static void multiboot2_read_header_tags(void)
+{
+ struct multiboot_header_tag *tag;
+
+ for (tag = (struct multiboot_header_tag *) (mbh + 1);
+ tag->type != MULTIBOOT_TAG_TYPE_END;
+ tag = (struct multiboot_header_tag *) ((char *) tag + ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)))
+ {
+ switch (tag->type)
+ {
+ case MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST:
+ {
+ mhi.request_tag = (struct multiboot_header_tag_information_request *) tag;
+ break;
+ }
+ case MULTIBOOT_HEADER_TAG_RELOCATABLE:
+ {
+ mhi.rel_tag = (struct multiboot_header_tag_relocatable *) tag;
+ break;
+ }
+ case MULTIBOOT_HEADER_TAG_ADDRESS:
+ {
+ mhi.addr_tag = (struct multiboot_header_tag_address *) tag;
+ break;
+ }
+ case MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS:
+ {
+ mhi.entry_addr_tag = (struct multiboot_header_tag_entry_address *) tag;
+ break;
+ }
+ case MULTIBOOT_HEADER_TAG_CONSOLE_FLAGS:
+ {
+ mhi.console_tag = (struct multiboot_header_tag_console_flags *) tag;
+ break;
+ }
+ case MULTIBOOT_HEADER_TAG_FRAMEBUFFER:
+ {
+ mhi.fb_tag = (struct multiboot_header_tag_framebuffer *) tag;
+ break;
+ }
+ case MULTIBOOT_HEADER_TAG_MODULE_ALIGN:
+ {
+ mhi.mod_align_tag = (struct multiboot_header_tag_module_align *) tag;
+ break;
+ }
+ case MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI64:
+ case MULTIBOOT_HEADER_TAG_EFI_BS:
+ /* Ignoring EFI. */
+ break;
+ default:
+ {
+ if (!(tag->flags & MULTIBOOT_HEADER_TAG_OPTIONAL))
+ fprintf(stderr, "unsupported tag: 0x%x", tag->type);
+ break;
+ }
+ }
+ }
+}
+
+struct multiboot_mmap_entry *multiboot_construct_memory_map(struct memory_range *range,
+ int ranges,
+ unsigned long long *mem_lower,
+ unsigned long long *mem_upper)
+{
+ struct multiboot_mmap_entry *entries;
+ int i;
+
+ *mem_lower = *mem_upper = 0;
+ entries = xmalloc(ranges * sizeof(*entries));
+ for (i = 0; i < ranges; i++) {
+ entries[i].addr = range[i].start;
+ entries[i].len = range[i].end - range[i].start + 1;
+
+ if (range[i].type == RANGE_RAM) {
+ entries[i].type = MULTIBOOT_MEMORY_AVAILABLE;
+ /*
+ * Is this the "low" memory? Can't just test
+ * against zero, because Linux protects (and
+ * hides) the first few pages of physical
+ * memory.
+ */
+
+ if ((range[i].start <= 64*1024)
+ && (range[i].end > *mem_lower)) {
+ range[i].start = 0;
+ *mem_lower = range[i].end;
+ }
+ /* Is this the "high" memory? */
+ if ((range[i].start <= 0x100000)
+ && (range[i].end > *mem_upper + 0x100000))
+ *mem_upper = range[i].end - 0x100000;
+ } else if (range[i].type == RANGE_ACPI)
+ entries[i].type = MULTIBOOT_MEMORY_ACPI_RECLAIMABLE;
+ else if (range[i].type == RANGE_ACPI_NVS)
+ entries[i].type = MULTIBOOT_MEMORY_NVS;
+ else if (range[i].type == RANGE_RESERVED)
+ entries[i].type = MULTIBOOT_MEMORY_RESERVED;
+ }
+ return entries;
+}
+
+static uint64_t multiboot2_make_mbi(struct kexec_info *info, char *cmdline, int cmdline_len,
+ unsigned long load_base_addr, void *mbi_buf, size_t mbi_bytes)
+{
+ uint64_t *ptrorig = mbi_buf;
+ struct multiboot_mmap_entry *mmap_entries;
+ unsigned long long mem_lower = 0, mem_upper = 0;
+
+ *ptrorig = mbi_bytes; /* u32 total_size, u32 reserved */
+ ptrorig++;
+
+ mmap_entries = multiboot_construct_memory_map(info->memory_range, info->memory_ranges, &mem_lower, &mem_upper);
+ {
+ struct multiboot_tag_basic_meminfo *tag = (struct multiboot_tag_basic_meminfo *) ptrorig;
+
+ tag->type = MULTIBOOT_TAG_TYPE_BASIC_MEMINFO;
+ tag->size = sizeof (struct multiboot_tag_basic_meminfo);
+ tag->mem_lower = mem_lower >> 10;
+ tag->mem_upper = mem_upper >> 10;
+ ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN) / sizeof (*ptrorig);
+ }
+
+ {
+ struct multiboot_tag_mmap *tag = (struct multiboot_tag_mmap *) ptrorig;
+
+ tag->type = MULTIBOOT_TAG_TYPE_MMAP;
+ tag->size = sizeof(struct multiboot_tag_mmap) + sizeof(struct multiboot_mmap_entry) * info->memory_ranges;
+ tag->entry_size = sizeof(struct multiboot_mmap_entry);
+ tag->entry_version = 0;
+ memcpy(tag->entries, mmap_entries, tag->entry_size * info->memory_ranges);
+ ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN) / sizeof (*ptrorig);
+ }
+
+ if (mhi.rel_tag) {
+ struct multiboot_tag_load_base_addr *tag = (struct multiboot_tag_load_base_addr *) ptrorig;
+
+ tag->type = MULTIBOOT_TAG_TYPE_LOAD_BASE_ADDR;
+ tag->size = sizeof (struct multiboot_tag_load_base_addr);
+ tag->load_base_addr = load_base_addr;
+ ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN) / sizeof (*ptrorig);
+ }
+
+ {
+ struct multiboot_tag_string *tag = (struct multiboot_tag_string *) ptrorig;
+
+ tag->type = MULTIBOOT_TAG_TYPE_CMDLINE;
+ tag->size = sizeof (struct multiboot_tag_string) + cmdline_len;
+ memcpy(tag->string, cmdline, cmdline_len);
+ ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN) / sizeof (*ptrorig);
+ }
+
+ {
+ struct multiboot_tag_string *tag = (struct multiboot_tag_string *) ptrorig;
+
+ tag->type = MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME;
+ tag->size = sizeof(struct multiboot_tag_string) + strlen(BOOTLOADER " " BOOTLOADER_VERSION) + 1;
+ sprintf(tag->string, "%s", BOOTLOADER " " BOOTLOADER_VERSION);
+ ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN) / sizeof (*ptrorig);
+ }
+
+ if (mhi.fb_tag) {
+ struct multiboot_tag_framebuffer *tag = (struct multiboot_tag_framebuffer *) ptrorig;
+ struct fb_fix_screeninfo info;
+ struct fb_var_screeninfo mode;
+ int fd;
+
+ tag->common.type = MULTIBOOT_TAG_TYPE_FRAMEBUFFER;
+ tag->common.size = sizeof(struct multiboot_tag_framebuffer);
+ /* check if purgatory will reset to standard ega text mode */
+ if (arch_options.reset_vga || arch_options.console_vga) {
+ tag->common.framebuffer_type = MB_FRAMEBUFFER_TYPE_EGA_TEXT;
+ tag->common.framebuffer_addr = 0xb8000;
+ tag->common.framebuffer_pitch = 80*2;
+ tag->common.framebuffer_width = 80;
+ tag->common.framebuffer_height = 25;
+ tag->common.framebuffer_bpp = 16;
+
+ ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN) / sizeof (*ptrorig);
+ goto out;
+ }
+
+ /* use current graphics framebuffer settings */
+ fd = open("/dev/fb0", O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "can't open /dev/fb0: %s\n", strerror(errno));
+ goto out;
+ }
+ if (ioctl(fd, FBIOGET_FSCREENINFO, &info) < 0){
+ fprintf(stderr, "can't get screeninfo: %s\n", strerror(errno));
+ close(fd);
+ goto out;
+ }
+ if (ioctl(fd, FBIOGET_VSCREENINFO, &mode) < 0){
+ fprintf(stderr, "can't get modeinfo: %s\n", strerror(errno));
+ close(fd);
+ goto out;
+ }
+ close(fd);
+
+ if (info.smem_start == 0 || info.smem_len == 0) {
+ fprintf(stderr, "can't get linerar framebuffer address\n");
+ goto out;
+ }
+
+ if (info.type != FB_TYPE_PACKED_PIXELS) {
+ fprintf(stderr, "unsupported framebuffer type\n");
+ goto out;
+ }
+
+ if (info.visual != FB_VISUAL_TRUECOLOR) {
+ fprintf(stderr, "unsupported framebuffer visual\n");
+ goto out;
+ }
+
+ tag->common.framebuffer_type = MB_FRAMEBUFFER_TYPE_RGB;
+ tag->common.framebuffer_addr = info.smem_start;
+ tag->common.framebuffer_pitch = info.line_length;
+ tag->common.framebuffer_width = mode.xres;
+ tag->common.framebuffer_height = mode.yres;
+ tag->common.framebuffer_bpp = mode.bits_per_pixel;
+
+ tag->framebuffer_red_field_position = mode.red.offset;
+ tag->framebuffer_red_mask_size = mode.red.length;
+ tag->framebuffer_green_field_position = mode.green.offset;
+ tag->framebuffer_green_mask_size = mode.green.length;
+ tag->framebuffer_blue_field_position = mode.blue.offset;
+ tag->framebuffer_blue_mask_size = mode.blue.length;
+
+ ptrorig += ALIGN_UP (tag->common.size, MULTIBOOT_TAG_ALIGN) / sizeof (*ptrorig);
+ }
+
+out:
+ return (uint64_t) (uintptr_t) ptrorig;
+}
+
+static uint64_t multiboot2_mbi_add_module(void *mbi_buf, uint64_t mbi_ptr, uint32_t mod_start,
+ uint32_t mod_end, char *mod_clp)
+{
+ struct multiboot_tag_module *tag = (struct multiboot_tag_module *) (uintptr_t) mbi_ptr;
+
+ tag->type = MULTIBOOT_TAG_TYPE_MODULE;
+ tag->size = sizeof(struct multiboot_tag_module) + strlen((char *)(long) mod_clp) + 1;
+ tag->mod_start = mod_start;
+ tag->mod_end = mod_end;
+
+ memcpy(tag->cmdline, (char *)(long) mod_clp, strlen((char *)(long) mod_clp) + 1);
+ mbi_ptr += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
+
+ return mbi_ptr;
+}
+
+static uint64_t multiboot2_mbi_end(void *mbi_buf, uint64_t mbi_ptr)
+{
+ struct multiboot_tag *tag = (struct multiboot_tag *) (uintptr_t) mbi_ptr;
+
+ tag->type = MULTIBOOT_TAG_TYPE_END;
+ tag->size = sizeof (struct multiboot_tag);
+ mbi_ptr += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN);
+
+ return mbi_ptr;
+}
+
+static inline int multiboot2_rel_valid(struct multiboot_header_tag_relocatable *rel_tag,
+ uint64_t rel_start, uint64_t rel_end)
+{
+ if (rel_start >= rel_tag->min_addr && rel_end <= rel_tag->max_addr)
+ return 1;
+
+ return 0;
+}
+
+int multiboot2_x86_load(int argc, char **argv, const char *buf, off_t len,
+ struct kexec_info *info)
+{
+ struct mem_ehdr ehdr;
+ void *mbi_buf;
+ size_t mbi_bytes;
+ unsigned long addr;
+ struct entry32_regs regs;
+ char *command_line = NULL, *tmp_cmdline = NULL;
+ int command_line_len;
+ char *imagename, *cp, *append = NULL;;
+ int opt;
+ int modules, mod_command_line_space;
+ uint64_t mbi_ptr;
+ char *mod_clp_base;
+ /* See options.h -- add any more there, too. */
+ static const struct option options[] = {
+ KEXEC_ARCH_OPTIONS
+ { "command-line", 1, 0, OPT_CL },
+ { "append", 1, 0, OPT_CL },
+ { "reuse-cmdline", 0, 0, OPT_REUSE_CMDLINE },
+ { "module", 1, 0, OPT_MOD },
+ { 0, 0, 0, 0 },
+ };
+ static const char short_options[] = KEXEC_ARCH_OPT_STR "";
+ uint64_t rel_min, rel_max;
+
+ /* Probe for the MB header if it's not already found */
+ if (mbh == NULL && multiboot_x86_probe(buf, len) != 1)
+ {
+ fprintf(stderr, "Cannot find a loadable multiboot2 header.\n");
+ return -1;
+ }
+
+ /* Parse the header tags. */
+ multiboot2_read_header_tags();
+
+ /* Parse the command line */
+ command_line_len = 0;
+ modules = 0;
+ mod_command_line_space = 0;
+ while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1)
+ {
+ switch(opt) {
+ default:
+ /* Ignore core options */
+ if (opt < OPT_ARCH_MAX) {
+ break;
+ }
+ case OPT_CL:
+ append = optarg;
+ break;
+ case OPT_REUSE_CMDLINE:
+ tmp_cmdline = get_command_line();
+ break;
+ case OPT_MOD:
+ modules++;
+ mod_command_line_space += strlen(optarg) + 1;
+ break;
+ }
+ }
+ imagename = argv[optind];
+
+ /* Final command line = imagename + <OPT_REUSE_CMDLINE> + <OPT_CL> */
+ tmp_cmdline = concat_cmdline(command_line, append);
+ if (command_line) {
+ free(command_line);
+ }
+ command_line = concat_cmdline(imagename, tmp_cmdline);
+ if (tmp_cmdline) {
+ free(tmp_cmdline);
+ }
+
+ if (xen_present() && info->kexec_flags & KEXEC_LIVE_UPDATE ) {
+ if (!mhi.rel_tag) {
+ fprintf(stderr, "Multiboot2 image must be relocatable"
+ "for KEXEC_LIVE_UPDATE.\n");
+ return -1;
+ }
+ cmdline_add_liveupdate(&command_line);
+ }
+
+ command_line_len = strlen(command_line) + 1;
+
+ /* Load the ELF executable */
+ if (mhi.rel_tag) {
+ rel_min = mhi.rel_tag->min_addr;
+ rel_max = mhi.rel_tag->max_addr;
+
+ if (info->kexec_flags & KEXEC_LIVE_UPDATE && xen_present()) {
+ /* TODO also check if elf is xen */
+ /* On a live update, load target xen over the current xen image. */
+ uint64_t xen_start, xen_end;
+
+ xen_get_kexec_range(KEXEC_RANGE_MA_XEN, &xen_start, &xen_end);
+ if (multiboot2_rel_valid(mhi.rel_tag, xen_start, xen_end)) {
+ rel_min = xen_start;
+ } else {
+ fprintf(stderr, "Cannot place Elf into "
+ "KEXEC_RANGE_MA_XEN for KEXEC_LIVE_UPDATE.\n");
+ return -1;
+ }
+ }
+
+ elf_exec_build_load_relocatable(info, &ehdr, buf, len, 0,
+ rel_min, rel_max, mhi.rel_tag->align);
+ } else
+ elf_exec_build_load(info, &ehdr, buf, len, 0);
+
+ if (info->kexec_flags & KEXEC_LIVE_UPDATE && xen_present()) {
+ uint64_t lu_start, lu_end;
+
+ xen_get_kexec_range(7 /* KEXEC_RANGE_MA_LIVEUPDATE */, &lu_start, &lu_end);
+ /* Fit everything else into lu_start-lu_end. First page after lu_start is
+ * reserved for LU breadcrumb. */
+ rel_min = lu_start + 4096;
+ rel_max = lu_end;
+ } else {
+ rel_min = 0x500;
+ rel_max = ULONG_MAX;
+ }
+
+ /* Load the setup code */
+ elf_rel_build_load(info, &info->rhdr, purgatory, purgatory_size,
+ rel_min, rel_max, 1, 0);
+
+ /* Construct information tags. */
+ mbi_bytes = multiboot2_get_mbi_size(info->memory_ranges, command_line_len, modules, mod_command_line_space);
+ mbi_buf = xmalloc(mbi_bytes);
+
+ mbi_ptr = multiboot2_make_mbi(info, command_line, command_line_len, info->rhdr.rel_addr, mbi_buf, mbi_bytes);
+ free(command_line);
+
+ if (info->kexec_flags & KEXEC_LIVE_UPDATE && xen_present()) {
+ if (multiboot2_rel_valid(mhi.rel_tag, rel_min, rel_max)) {
+ /* Shrink the reloc range to fit into LU region for xen. */
+ mhi.rel_tag->min_addr = rel_min;
+ mhi.rel_tag->max_addr = rel_max;
+ } else {
+ fprintf(stderr, "Multiboot2 image cannot be relocated into "
+ "KEXEC_RANGE_MA_LIVEUPDATE for KEXEC_LIVE_UPDATE.\n");
+ return -1;
+ }
+ }
+
+ /* Load modules */
+ if (modules) {
+ char *mod_filename, *mod_command_line, *mod_clp, *buf;
+ off_t mod_size;
+ int i = 0;
+
+ mod_clp_base = xmalloc(mod_command_line_space);
+
+ /* Go back and parse the module command lines */
+ mod_clp = mod_clp_base;
+ optind = opterr = 1;
+ while((opt = getopt_long(argc, argv,
+ short_options, options, 0)) != -1) {
+ if (opt != OPT_MOD) continue;
+
+ /* Split module filename from command line */
+ mod_command_line = mod_filename = optarg;
+ if ((cp = strchr(mod_filename, ' ')) != NULL) {
+ /* See as I discard the 'const' modifier */
+ *cp = '\0';
+ }
+
+ /* Load the module */
+ buf = slurp_decompress_file(mod_filename, &mod_size);
+
+ if (cp != NULL) *cp = ' ';
+
+ /* Pick the next aligned spot to load it in. Always page align. */
+ addr = add_buffer(info, buf, mod_size, mod_size, getpagesize(),
+ rel_min, rel_max, 1);
+
+ /* Add the module command line */
+ sprintf(mod_clp, "%s", mod_command_line);
+
+ mbi_ptr = multiboot2_mbi_add_module(mbi_buf, mbi_ptr, addr, addr + mod_size, mod_clp);
+
+ mod_clp += strlen(mod_clp) + 1;
+ i++;
+ }
+
+ free(mod_clp_base);
+ }
+
+ mbi_ptr = multiboot2_mbi_end(mbi_buf, mbi_ptr);
+
+ if (sort_segments(info) < 0)
+ return -1;
+
+ addr = add_buffer(info, mbi_buf, mbi_bytes, mbi_bytes, 4,
+ rel_min, rel_max, 1);
+
+ elf_rel_get_symbol(&info->rhdr, "entry32_regs", &regs, sizeof(regs));
+ regs.eax = MULTIBOOT2_BOOTLOADER_MAGIC;
+ regs.ebx = addr;
+ regs.eip = ehdr.e_entry;
+ elf_rel_set_symbol(&info->rhdr, "entry32_regs", &regs, sizeof(regs));
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 22:46:35 +0000