I am building previously working code, but I am getting a seg fault and I can't figure out what went wrong. gdb catches the error, but it doesn't point to an obvious cause. The source line it shows is a function name, so it doesn't even get into the function. If I look at the dissasembly of the instruction it is still setting up the stack, so maybe the stack is messed up. So how should I go about debugging this? This is in QNX 6.2, console gdb only.
0x0816b829 in __ml (this=0x79b963c, anMultiplier=0) at ../u_matrix.cpp:56
56 tcMatrix tcMatrix::operator*(float64 anMultiplier)
0x816b820 <__ml>: push %ebp
0x816b821 <__ml+1>: mov %esp,%ebp
0x816b823 <__ml+3>: sub $0x13ac,%esp
0x816b829 <__ml+9>: push %edi
0x816b82a <__ml+10>: push %esi
0x816b82b <__ml+11>: push %ebx