53 lines
802 B
ArmAsm
53 lines
802 B
ArmAsm
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# setjmp/longjmp for m32r. The jmpbuf looks like this:
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#
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# Register jmpbuf offset
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# reserved 0x00
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# R8 0x04
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# R9 0x08
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# R10 0x0c
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# R11 0x10
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# R12 0x14
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# R13 (FP) 0x18
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# R14 (LR) 0x1c
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# R15 (SP) 0x20
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# reserved 0x24
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.text
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.global setjmp
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setjmp:
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;addi r0, #-4 ; commented out as first word is reserved
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;st r1, @+r0
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st r8, @+r0
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st r9, @+r0
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st r10, @+r0
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st r11, @+r0
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st r12, @+r0
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st r13, @+r0
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st r14, @+r0
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st r15, @+r0
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# Return 0 to caller.
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ldi r0, #0
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jmp lr
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.global longjmp
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longjmp:
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addi r0, #4 ; first word is reserved
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;ld r1, @r0+
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ld r8, @r0+
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ld r9, @r0+
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ld r10, @r0+
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ld r11, @r0+
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ld r12, @r0+
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ld r13, @r0+
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ld r2, @r0+ ; return address
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ld r15, @r0+
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# If caller attempted to return 0, return 1 instead.
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mv r0, r1
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bnez r0, .Lnonzero
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ldi r0, #1
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.Lnonzero:
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jmp r2
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