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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:
802 bytes
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| Line | |
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| 1 | # setjmp/longjmp for m32r. The jmpbuf looks like this: |
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| 2 | # |
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| 3 | # Register jmpbuf offset |
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| 4 | # reserved 0x00 |
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| 5 | # R8 0x04 |
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| 6 | # R9 0x08 |
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| 7 | # R10 0x0c |
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| 8 | # R11 0x10 |
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| 9 | # R12 0x14 |
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| 10 | # R13 (FP) 0x18 |
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| 11 | # R14 (LR) 0x1c |
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| 12 | # R15 (SP) 0x20 |
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| 13 | # reserved 0x24 |
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| 14 | |
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| 15 | .text |
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| 16 | .global setjmp |
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| 17 | setjmp: |
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| 18 | ;addi r0, #-4 ; commented out as first word is reserved |
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| 19 | ;st r1, @+r0 |
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| 20 | st r8, @+r0 |
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| 21 | st r9, @+r0 |
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| 22 | st r10, @+r0 |
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| 23 | st r11, @+r0 |
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| 24 | st r12, @+r0 |
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| 25 | st r13, @+r0 |
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| 26 | st r14, @+r0 |
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| 27 | st r15, @+r0 |
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| 28 | |
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| 29 | # Return 0 to caller. |
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| 30 | ldi r0, #0 |
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| 31 | jmp lr |
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| 32 | |
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| 33 | .global longjmp |
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| 34 | longjmp: |
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| 35 | addi r0, #4 ; first word is reserved |
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| 36 | ;ld r1, @r0+ |
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| 37 | ld r8, @r0+ |
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| 38 | ld r9, @r0+ |
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| 39 | ld r10, @r0+ |
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| 40 | ld r11, @r0+ |
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| 41 | ld r12, @r0+ |
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| 42 | ld r13, @r0+ |
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| 43 | ld r2, @r0+ ; return address |
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| 44 | ld r15, @r0+ |
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| 45 | |
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| 46 | # If caller attempted to return 0, return 1 instead. |
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| 47 | |
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| 48 | mv r0, r1 |
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| 49 | bnez r0, .Lnonzero |
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| 50 | ldi r0, #1 |
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| 51 | .Lnonzero: |
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| 52 | jmp r2 |
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