quick question on powerpc code

[lgtmelo]

i have the following:

and FKLAFUGD is a label for the following address:

whats the point in calling lis r3,0x5d before calling a lhz command? i mean, wont the lhz just overwrite what the lis did?
from what ive learned:
lis r3,0x5d // this makes r3 = 0x5d0000
lhz r3, offset FKLAFUGD(r3) // this loads whatever is in FKLAFUGD's address (005d25dc), which is 38 f6 into a lhz r3 (which is 000038f6)

[kur4o]

First line loads a pointer to r3

Second line adds offset to pinter to r3, and than data from that offset is stored to r3.

PPc code can use only 16 bit addressing and makes full address out of 2 commands

I have another quick question,

How to set up in IDApro r14-r17 registers with fixed values as in r2 and r13.

[lgtmelo]

First line loads a pointer to r3

Second line adds offset to pinter to r3, and than data from that offset is stored to r3.

PPc code can use only 16 bit addressing and makes full address out of 2 commands

I have another quick question,

How to set up in IDApro r14-r17 registers with fixed values as in r2 and r13.

hey, thanks for the tip. i managed to read what is actually in the code by doing ctrl+shift+g. second line is r3,0x25dc(r3), which is r3=(r3+0x25dc). since r3 is previously defined as 0x5d, this now makes sense to me!

[gmtech825]

Instead of CTR shift del, you can click on the op and look at the bottom right corner of the screen and it will show the actual code.

I also would love to know how to setup ida register values if anyone knows