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Verify Multiboot 2 does give us memory map

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This commit is contained in:
Alex Kotov 2020-11-27 00:04:38 +05:00
parent 15c3269c38
commit de9fe77c3b
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
1 changed files with 6 additions and 0 deletions
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6
kernelmq/main.c
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@ -37,6 +37,12 @@ void main(unsigned long multiboot_magic, unsigned long multiboot_info_base)
panic("Can not parse Multiboot 2 info."); panic("Can not parse Multiboot 2 info.");
} }
const unsigned long multiboot_flags = *(unsigned long*)multiboot_info_base;
if (!(multiboot_flags & (1 << 6))) {
panic("Multiboot 2 doesn't give us memory map.");
}
kinfo.kernel_offset = (unsigned long)&_kernel_offset; kinfo.kernel_offset = (unsigned long)&_kernel_offset;
kinfo.kernel_size = (unsigned long)&_kernel_size; kinfo.kernel_size = (unsigned long)&_kernel_size;