35 lines
631 B
ArmAsm
35 lines
631 B
ArmAsm
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;;
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;; The errno will be in r5 if r11 is -1.
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;;
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.text
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.global __trap0
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__trap0:
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;; non-leaf function so need to create stack frame to
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;; store ra and fp
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subi sp, sp, #16
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stw ra, sp, #12
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or r0, r0, r0 ;; nop
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stw fp, sp, #8
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or fp, sp, sp
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stw r5, sp, #4
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or r0, r0, r0 ;; nop
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stw r6, sp, #0
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addi r6, r0, #$-1
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si r14
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or r0, r0, r0 ;; nop
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brne r11, r6, .L0
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ldui r6, #%hi16(errno)
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addui r6, r6, #%lo16(errno)
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stw r5, r6, #0
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or r0, r0, r0 ;; nop
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.L0:
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ldw r6, sp, #0
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or r0, r0, r0 ;; nop
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ldw r5, sp, #4
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or r0, r0, r0 ;; nop
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ldw ra, sp, #12
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or r0, r0, r0 ;; nop
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ldw fp, sp, #8
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jal r0, r14
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addi sp, sp, #16
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