34 lines
1.5 KiB
C
34 lines
1.5 KiB
C
/*
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* boot_info_offsets.h — fixed byte offsets of BootInfo fields
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*
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* Read by kernel_entry.S (assembly) AND verified by _Static_assert in
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* uefi_loader.c. Both uses share this header; only #define directives
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* are used so the file is valid for the C preprocessor AND the GAS
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* preprocessor (which runs on .S files compiled via CC).
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*
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* If you change the BootInfo struct layout in uefi.h, update the
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* constants below AND re-check the _Static_asserts (search BOOT_INFO_OFFSETS).
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*
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* BootInfo layout (64-bit, natural alignment):
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* 0: memory_map ptr (8)
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* 8: memory_map_size u64 (8)
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* 16: memory_map_descriptor_size u64 (8)
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* 24: runtime_services ptr (8)
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* 32: acpi_table ptr (8)
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* 40: framebuffer FramebufferInfo (32)
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* .base ptr (8)
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* .size u64 (8)
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* .width u32 (4)
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* .height u32 (4)
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* .pixels_per_scanline u32 (4)
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* .pixel_format u32 (4)
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* 72: uefi_boot_services_exited u8 (1)
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* 73: [7 bytes padding]
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* 80: kernel_stack_base ptr (8) ← BOOT_INFO_KERNEL_STACK_BASE_OFFSET
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* 88: kernel_stack_size u64 (8) ← BOOT_INFO_KERNEL_STACK_SIZE_OFFSET
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* 96: args KernelArgs
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*/
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#define BOOT_INFO_KERNEL_STACK_BASE_OFFSET 80
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#define BOOT_INFO_KERNEL_STACK_SIZE_OFFSET 88
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