Is it possible using GNU tools (gcc, binutils, etc) to modify all occurrences of an assembly instruction into a no-op? Specifically, gcc with the -pg option generates the following assembly (ARM):
0x0: e1a0c00d mov ip, sp 0x4: e92dd800 stmdb sp!, {fp, ip, lr, pc} 0x8: e24cb004 sub fp, ip, #4 ; 0x4 0xc: ebfffffe bl 0 <mcount>I want to record the address of this last instruction, and then change it to a nop like in the following code
0x0: e1a0c00d mov ip, sp 0x4: e92dd800 stmdb sp!, {fp, ip, lr, pc} 0x8: e24cb004 sub fp, ip, #4 ; 0x4 0xc: e1a00000 nop (mov r0,r0)The Linux kernel can do something similar to this at run-time, but I'm looking for a build-time solution.