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55811d8dac
Clang has a completely inconsistent CLI for its integrated assembler for each target architecture. For x86_64, for example, it does not accept an -mcpu parameter, and emits "warning: unused parameter". However, for ARM, -mcpu is needed in order to properly lower assembly to machine code instructions (see new standalone test case provided thanks to @g-w1). This is a compromise betweenb8f85a805bandafb9f695b1.
34 lines
434 B
ArmAsm
34 lines
434 B
ArmAsm
.section ".text.boot"
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.global _start
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_start:
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mrc p15, #0, r1, c0, c0, #5
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and r1, r1, #3
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cmp r1, #0
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bne halt
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mov sp, #0x8000
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ldr r4, =__bss_start
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ldr r9, =__bss_end
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mov r5, #0
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mov r6, #0
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mov r7, #0
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mov r8, #0
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b 2f
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1:
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stmia r4!, {r5-r8}
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2:
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cmp r4, r9
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blo 1b
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ldr r3, =main
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blx r3
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halt:
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wfe
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b halt
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