58 lines
908 B
ArmAsm
58 lines
908 B
ArmAsm
.code64
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.section .boot.rodata, "a", @progbits
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/*******
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ERROR MESSAGE STRINGS
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*******/
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kernel_identifier:
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.asciz " Socks kernel version " BUILD_ID " "
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.section .boot.text, "ax", @progbits
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print_kernel_identifier:
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/* line 1: empty padding line */
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mov $kernel_identifier, %rsi
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mov $0xb8000, %rdi
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1:
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movw $0x7000, (%rdi) # black text on white background.
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add $0x02, %rdi
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inc %rsi
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cmpb $0, (%rsi)
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jne 1b
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/* line 2: kernel identiifer */
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mov $kernel_identifier, %rsi
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mov $0xb80A0, %rdi
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2:
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movsb
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movb $0x70, (%rdi) # black text on white background
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inc %rdi
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cmpb $0, (%rsi)
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jne 2b
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/* line 3: empty padding line */
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mov $kernel_identifier, %rsi
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mov $0xb8140, %rdi
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1:
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movw $0x7000, (%rdi) # black text on white background.
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add $0x02, %rdi
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inc %rsi
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cmpb $0, (%rsi)
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jne 1b
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ret
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.global start_64
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.type start_64, @function
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start_64:
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call print_kernel_identifier
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cli
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hlt
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