Error in multiboot 2 spec

[songziming]

It seems elf-symbols info tag format is incompliant.

Current version of multiboot2 spec: https://www.gnu.org/software/grub/manua ... 02dSymbols

In section 3.6.7, the format of elf-symbols tag is:

Code: Select all

        +-------------------+
u32     | type = 9          |
u32     | size              |
u16     | num               |
u16     | entsize           |
u16     | shndx             |
u16     | reserved          |
varies  | section headers   |
        +-------------------+

In section 4.4.1, content of multiboot2.h:

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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];
};

I also checked grub2 repo, the latter version is correct.

[eekee]

This is not the only place where Grub headers differ from the multiboot2 standard, the framebuffer info structure also differs. You just have to take the headers as canonical and the standard as more of a general idea.

[forgetme11]

LOL this is insane, wish I had found this post sooner, better off writing a bootloader than putting up with this nonsense.