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Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
631 bytes
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| Line | |
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| 1 | ;; |
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| 2 | ;; The errno will be in r5 if r11 is -1. |
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| 3 | ;; |
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| 4 | .text |
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| 5 | .global __trap0 |
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| 6 | __trap0: |
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| 7 | ;; non-leaf function so need to create stack frame to |
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| 8 | ;; store ra and fp |
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| 9 | subi sp, sp, #16 |
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| 10 | stw ra, sp, #12 |
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| 11 | or r0, r0, r0 ;; nop |
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| 12 | stw fp, sp, #8 |
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| 13 | or fp, sp, sp |
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| 14 | stw r5, sp, #4 |
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| 15 | or r0, r0, r0 ;; nop |
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| 16 | stw r6, sp, #0 |
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| 17 | addi r6, r0, #$-1 |
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| 18 | si r14 |
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| 19 | or r0, r0, r0 ;; nop |
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| 20 | brne r11, r6, .L0 |
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| 21 | ldui r6, #%hi16(errno) |
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| 22 | addui r6, r6, #%lo16(errno) |
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| 23 | stw r5, r6, #0 |
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| 24 | or r0, r0, r0 ;; nop |
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| 25 | .L0: |
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| 26 | ldw r6, sp, #0 |
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| 27 | or r0, r0, r0 ;; nop |
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| 28 | ldw r5, sp, #4 |
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| 29 | or r0, r0, r0 ;; nop |
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| 30 | ldw ra, sp, #12 |
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| 31 | or r0, r0, r0 ;; nop |
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| 32 | ldw fp, sp, #8 |
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| 33 | jal r0, r14 |
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| 34 | addi sp, sp, #16 |
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