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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:
741 bytes
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| Line | |
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| 1 | # setjmp/longjmp for FR30. The jmpbuf looks like this: |
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| 2 | # |
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| 3 | # Register jmpbuf offset |
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| 4 | # R8 0x00 |
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| 5 | # R9 0x04 |
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| 6 | # R10 0x08 |
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| 7 | # R11 0x0c |
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| 8 | # R12 0x10 |
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| 9 | # R13 0x14 |
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| 10 | # R14 (FP) 0x18 |
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| 11 | # R15 (SP) 0x1c |
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| 12 | # RP 0x20 |
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| 13 | |
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| 14 | .macro save reg |
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| 15 | st \reg,@r4 |
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| 16 | add #4,r4 |
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| 17 | .endm |
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| 18 | |
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| 19 | .macro restore reg |
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| 20 | ld @r4,\reg |
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| 21 | add #4,r4 |
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| 22 | .endm |
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| 23 | |
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| 24 | |
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| 25 | .text |
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| 26 | .global setjmp |
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| 27 | setjmp: |
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| 28 | save r8 |
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| 29 | save r9 |
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| 30 | save r10 |
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| 31 | save r11 |
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| 32 | save r12 |
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| 33 | save r13 |
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| 34 | save r14 |
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| 35 | save r15 |
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| 36 | mov RP,r5 |
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| 37 | st r5,@r4 |
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| 38 | |
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| 39 | # Return 0 to caller. |
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| 40 | ldi:8 #0,r4 |
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| 41 | ret |
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| 42 | |
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| 43 | .global longjmp |
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| 44 | longjmp: |
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| 45 | restore r8 |
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| 46 | restore r9 |
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| 47 | restore r10 |
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| 48 | restore r11 |
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| 49 | restore r12 |
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| 50 | restore r13 |
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| 51 | restore r14 |
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| 52 | restore r15 |
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| 53 | ld @r4,r4 |
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| 54 | mov r4,RP |
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| 55 | |
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| 56 | # If caller attempted to return 0, return 1 instead. |
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| 57 | |
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| 58 | mov r5,r4 |
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| 59 | or r4,r4 |
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| 60 | bne 1f |
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| 61 | ldi:8 #1,r4 |
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| 62 | 1: |
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| 63 | ret |
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| 64 | |
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