I'm using the multiboot2 for my kernel, and I'm trying to get the ELF symbols from GRUB2, but I do not know how to do that.
I have set .long MULTIBOOT_TAG_TYPE_ELF_SECTIONS in boot.s, also I got elf type, size, num, entsize and shndx from grub2.
.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];
};
