64 lines
741 B
ArmAsm
64 lines
741 B
ArmAsm
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# setjmp/longjmp for FR30. The jmpbuf looks like this:
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#
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# Register jmpbuf offset
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# R8 0x00
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# R9 0x04
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# R10 0x08
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# R11 0x0c
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# R12 0x10
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# R13 0x14
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# R14 (FP) 0x18
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# R15 (SP) 0x1c
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# RP 0x20
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.macro save reg
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st \reg,@r4
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add #4,r4
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.endm
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.macro restore reg
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ld @r4,\reg
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add #4,r4
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.endm
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.text
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.global setjmp
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setjmp:
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save r8
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save r9
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save r10
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save r11
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save r12
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save r13
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save r14
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save r15
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mov RP,r5
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st r5,@r4
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# Return 0 to caller.
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ldi:8 #0,r4
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ret
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.global longjmp
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longjmp:
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restore r8
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restore r9
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restore r10
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restore r11
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restore r12
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restore r13
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restore r14
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restore r15
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ld @r4,r4
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mov r4,RP
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# If caller attempted to return 0, return 1 instead.
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mov r5,r4
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or r4,r4
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bne 1f
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ldi:8 #1,r4
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1:
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ret
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