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4320c5fd58
Define the multiboot info struct properly so we don't have to grab at byte offsets in the memory access checker code. Also print kernel command line in init().
71 lines
1.3 KiB
ArmAsm
71 lines
1.3 KiB
ArmAsm
.set MULTIBOOT_MAGIC, 0x1badb002
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.set MULTIBOOT_PAGE_ALIGN, 0x1
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.set MULTIBOOT_MEMORY_INFO, 0x2
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.set MULTIBOOT_VIDEO_MODE, 0x0
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.set multiboot_flags, MULTIBOOT_PAGE_ALIGN | MULTIBOOT_MEMORY_INFO | MULTIBOOT_VIDEO_MODE
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.set multiboot_checksum, -(MULTIBOOT_MAGIC + multiboot_flags)
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.section .multiboot
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.align 4
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.long MULTIBOOT_MAGIC
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.long multiboot_flags
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.long multiboot_checksum
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/* for MULTIBOOT_MEMORY_INFO */
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.long 0x00000000 /* header_addr */
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.long 0x00000000 /* load_addr */
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.long 0x00000000 /* load_end_addr */
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.long 0x00000000 /* bss_end_addr */
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.long 0x00000000 /* entry_addr */
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/* for MULTIBOOT_VIDEO_MODE */
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.long 0x00000000 /* mode_type */
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.long 0 /* width */
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.long 0 /* height */
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.long 32 /* depth */
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.section .stack, "aw", @nobits
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stack_bottom:
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.skip 32768
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stack_top:
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.section .text
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.global start
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.type start, @function
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.extern init
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.type init, @function
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.extern multiboot_info_ptr
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.type multiboot_info_ptr, @object
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start:
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cli
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cld
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mov $stack_top, %esp
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and $-16, %esp
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pushl %esp
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pushl %eax /* Multiboot header magic */
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pushl %ebx /* Multiboot header pointer */
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mov %ebx, multiboot_info_ptr
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call init
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pushl $exit_message
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call kprintf
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cli
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loop:
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hlt
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jmp loop
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exit_message:
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.asciz "Kernel exited."
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