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61 lines
890 B
61 lines
890 B
.include "exit_return.s"
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.global _start
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_start:
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# Set base value of a0 to 'test failed'
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addi a0, zero, 1
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# Setup a stack
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addi sp, sp, 0x100
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# Try to call a simple function
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jal fn1
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# Try to call two imbricated functions
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jal fn0
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# Jump to 'just_after'
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auipc ra, 0
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jalr 16(ra)
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# Jump far to test jalr with negative offset
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jal fnfar
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exret
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# just_after : address is 16 bytes after auipc
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just_after:
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# ra must still be the old address
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ret
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exret
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# fn0 : function that calls fn1 and returns
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fn0:
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# Make space on the stack
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addi sp, sp, -4
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# Save ra
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sw ra, 0(sp)
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# Call fn1
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jal fn1
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# Restore ra and stack
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lw ra, 0(sp)
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addi sp, sp, 4
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ret
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exret
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# fn1 : just return
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fn1:
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ret
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exret
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fnneg:
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addi a0, zero, 0
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exret
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fnfar:
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auipc ra, 0
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jalr -8(ra)
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exret
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