δΊ 2013/5/30 20:53, Alessandro Ghedini ει:
And here is the relevant assembly:
(gdb) disas
[...]
0x380801c4 <+508>: move at,at
=> 0x380801c8 <+512>: beq v0,t0,0x380801e4 <preen_nsegments+540>
Older MIPS instruction set has no 'mul' instruction, normally it is
mult/multu, which stores the results to hi/lo register pair instead of a
general purpose destination register. Then use mfhi/mflo to use the result.
The binary must be compiled with one of the latest instruction set(I
don't remember the exact version, maybe mips32r2/mips64r2). Compiling
with -mips2 or something like that should be ok.
0x380801cc <+516>: mul a2,v0,t3
0x380801d0 <+520>: addu v0,a2,t2
0x380801d4 <+524>: lbu a2,0(v0)
0x380801d8 <+528>: beqz a2,0x380803b8 <preen_nsegments+1008>
0x380801dc <+532>: li a2,819
0x380801e0 <+536>: sb t1,1(v0)
0x380801e4 <+540>: addiu a0,a0,1
I'm not much into MIPS, but there doesn't seem to be anything weird there. Could
someone from debian-mips shed some light on this?
Cheers
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