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branches to label outside > 16-bit offset range not detected #238

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andrew-taylor opened this issue Sep 19, 2022 · 1 comment

andrew-taylor commented Sep 19, 2022

$ (printf 'main:b end\n';yes nop|sed 32767q;printf 'end:jr $ra') >a.s
$ 1521 mipsy a.s

error: segmentation fault

this happened because you tried to execute
the address `0x003e0000`, which is not a valid address to execute

the instruction that got us here was:
0x00400000 1   [0x10008000]    beq    $zero, $zero, -32768 #  main:b end


tip: the address `0x003e0000` is not part of any segment

Owner

insou22 commented Sep 19, 2022

evil...

this issue also applies to j family range also

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