On 05/01/2012 05:10 PM, Daniel Drake wrote: > Specifically this bit looks of interest: > > 0x499fe5d4: ldr r8, [pc, #31461008] ; 0x499fea44 > 0x499fe5d8: blx r8 > > So the first instruction here says "take the data at address > pc+31461008 and save it in r8". > pc is always 8 bytes on from the address of the current instruction, > so at the moment pc = 0x499fe5d4 + 8 = 0x499fe5dc
I failed to spell out on IRC that the value you want for the offset is the one in the comment (value_in_comment). The raw #31461008 contains non-addressing bits taken from the ARM encoding. So actually, it's saying to load r8 with the value at 0x499fea44. The gory details are in print_arm_address in gdb, which is also where we'll add 8 to the value of the pc in the offset so you don't need to. Perhaps sometime someone might document gdb on ARM a little more... Jon. _______________________________________________ arm mailing list [email protected] https://admin.fedoraproject.org/mailman/listinfo/arm
