assembly

问题 Does the LEA instruction support negative displacement? mov rax, 1 lea rsi, [rsp - rax] When I use the above code in my asm file I got the error: $ nasm -f macho64 test.asm $ error: invalid effective address I Know that we can do pointer arithmetic like this in C: void foo(char *a, size_t b) { *(a - b) = 1; } then I assume that: lea rsi, [rsp - rax] will work. And I also try to see what the GCC compiler do by using: $ gcc -S foo.c // foo.c has the function foo(above) in it but my asm

问题 Does the LEA instruction support negative displacement? mov rax, 1 lea rsi, [rsp - rax] When I use the above code in my asm file I got the error: $ nasm -f macho64 test.asm $ error: invalid effective address I Know that we can do pointer arithmetic like this in C: void foo(char *a, size_t b) { *(a - b) = 1; } then I assume that: lea rsi, [rsp - rax] will work. And I also try to see what the GCC compiler do by using: $ gcc -S foo.c // foo.c has the function foo(above) in it but my asm

来源： https://stackoverflow.com/questions/64864035/any-cpuid-like-instruction-in-armv8

来源： https://stackoverflow.com/questions/40435552/arm-assembly-proper-way-to-push-pop-link-register-and-pc-in-a-subroutine-and-cal

来源： https://stackoverflow.com/questions/40435552/arm-assembly-proper-way-to-push-pop-link-register-and-pc-in-a-subroutine-and-cal

来源： https://stackoverflow.com/questions/5513513/cant-subtract-registers-in-an-addressing-mode

来源： https://stackoverflow.com/questions/5513513/cant-subtract-registers-in-an-addressing-mode

来源： https://stackoverflow.com/questions/50571275/why-does-a-syscall-clobber-rcx-and-r11

来源： https://stackoverflow.com/questions/37153381/why-is-my-mips-base-converter-printing-out-the-values-from-a-previous-loop-after

来源： https://stackoverflow.com/questions/37153381/why-is-my-mips-base-converter-printing-out-the-values-from-a-previous-loop-after