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我正在为我的内核使用 multiboot2,我正在尝试从 GRUB2 获取 ELF 符号,但我不知道该怎么做。

我已经.long MULTIBOOT_TAG_TYPE_ELF_SECTIONS在 boot.s 中设置了,我还从 grub2 获得了 elf 类型、大小、num、entsize 和 shndx。

.section .multiboot_header
.align 8
multiboot_header:
  .long MULTIBOOT2_HEADER_MAGIC
  .long MULTIBOOT_ARCHITECTURE_I386
  .long multiboot_header_end - multiboot_header
  .long -(MULTIBOOT2_HEADER_MAGIC + MULTIBOOT_ARCHITECTURE_I386 + multiboot_header_end - multiboot_header)

# multiboot2 information request
.align 8
mbi_tag_start:
  .short MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST
  .short MULTIBOOT_HEADER_TAG_OPTIONAL
  .long mbi_tag_end - mbi_tag_start
  .long MULTIBOOT_TAG_TYPE_CMDLINE
  .long MULTIBOOT_TAG_TYPE_MODULE
  .long MULTIBOOT_TAG_TYPE_BOOTDEV
  .long MULTIBOOT_TAG_TYPE_MMAP
  .long MULTIBOOT_TAG_TYPE_ELF_SECTIONS
  .long MULTIBOOT_TAG_TYPE_APM
.align 8
mbi_tag_end:
    .short MULTIBOOT_HEADER_TAG_END
  .short 0
  .long 8
multiboot_header_end:
struct multiboot_tag_elf_sections {
    multiboot_uint32_t type;
    multiboot_uint32_t size;
    multiboot_uint32_t num;
    multiboot_uint32_t entsize;
    multiboot_uint32_t shndx;
    char sections[0];
};

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1 回答 1

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在多重引导信息中搜索 type=9 的标记。

于 2019-06-19T04:38:45.843 回答