I'm learning assembler programming on my Raspberry Pi 4 running RasPiOS Bookworm, 64bit, GUI.
It's not easy to find reliable information.
Here's the problem I'm having:Using gdb it shows that LSR does NOT set the carry flag. Googling showed this topic viewtopic.php?t=361647
dealing with the same problem, however the proposed solution doesn't even assemble on my system:as --dump-config shows this information:
alias = aarch64-linux-gnu
canonical = aarch64-unknown-linux-gnu
cpu-type = aarch64
bfd-target = elf64-littleaarch64
I'm in need of help with gdb as well - I couldn't fogure out how to display the flag register.
Any help, hints or links to reliable information sources is appreciated.
It's not easy to find reliable information.
Here's the problem I'm having:
Code:
.global _start_start: mov w1, #0x0E mov w2, #0x01 add w0, w1, w2 lsr w3, w0, #1 bcc _skip add w0, w0, #1_skip: mov w7, #1 svc 0dealing with the same problem, however the proposed solution doesn't even assemble on my system:
Code:
t2.s: Assembler messages:t2.s:4: Error: operand 1 must be an integer register -- `mov r0,#0x8f't2.s:5: Error: unknown mnemonic `rrxs' -- `rrxs r0,r0't2.s:7: Error: operand 1 must be an integer register -- `mov r2,#2't2.s:10: Error: operand 1 must be an integer register -- `mov r3,#3'alias = aarch64-linux-gnu
canonical = aarch64-unknown-linux-gnu
cpu-type = aarch64
bfd-target = elf64-littleaarch64
I'm in need of help with gdb as well - I couldn't fogure out how to display the flag register.
Any help, hints or links to reliable information sources is appreciated.
Statistics: Posted by gyrogearloose — Mon Mar 04, 2024 4:45 pm