assembly - How does the ldr instruction work on ARM? - Reverse ...
2021年4月9日 · ldr x0, pc_relative_ldr b 1f pc_relative_ldr: .quad 0x123456789ABCDEF0 1: /* x0 == 0x123456789ABCDEF0 */ with an offset: ldr x0, 0x8 b 1f .quad 0x123456789ABCDEF0 1: …
Why use LDR over MOV (or vice versa) for constants in ARM …
ldr, on the other hand, is versatile (mainly due to compiler optimizations). It works like this (as shown in the disassembled routine) It works like this (as shown in the disassembled routine) If …
LDR in Assembly Language diffrent forms? - Stack Overflow
2015年1月17日 · LDR r1, [r0, #4] LDR r2, [r0], #8 LDR r3, [r0] LDR r4, [r0, #4]! These are all defined varibles in the memory. Memory Address Content 0x100 0x02 0x104 0x05 0x108 …
assembly - Understanding of LDR and STR? - Stack Overflow
2014年5月1日 · LDR R0,[R0] loads R0 with a value from memory using R0 as the address of that memory. STR R0,[R1] stores the value in R0 into memory using R1 as the address of that …
assembly - ARM LDR instruction on PC register - Stack Overflow
2014年7月15日 · LDR instruction is loading the value of second operand into first operand (for example) LDR r0, [pc, 0x5678] is equivalent to this "C code" r0 = *(pc + 0x5678) It's pointer …
assembly - lc3 LDR instruction and the value stored - Stack Overflow
2014年9月16日 · The second parameter is the offset of the base address that will be loaded. I started to take some pictures to post here and make a good explanation but I found an …
assembly - difference between ldr and ldr.w - Stack Overflow
2012年3月21日 · LDR.W always generates a 32-bit instruction, even if the target could be reached using a 16-bit LDR. For forward references, LDR without .W always generates a 16 …
assembly - How does the LDR instruction load constants into …
2017年6月28日 · It gets added, at runtime, to the constant calculated, at assembly time, by const_number-8-{pc}. There's no way to encode LDR r0, [const_number] as an ARM …
arm - How to use STR and LDR in Assembly - Stack Overflow
2022年8月26日 · MOV R2, #0x20000000 STR R0, [R2, #0x40] @ 0x20000000 + 0x40 = 0x20000040 STR R1, [R2, #0x44] @ 0x20000000 + 0x44 = 0x20000044 LDR R7, [R2, #0x40] …
LDR and EQU in ARM Assembly - Stack Overflow
2020年6月25日 · Technically an arm assembler's assembly language does not have to support the ldr r0,[r4] syntax the assembler authors are free to do whatever they want ldr r0,(r4), ldr …