assembly

问题 In a bizarre turn of events, I've ended up in the following predicament where I'm using the following Python code to write the assembly generated by Numba to a file: @jit(nopython=True, nogil=True) def six(): return 6 with open("six.asm", "w") as f: for k, v in six.inspect_asm().items(): f.write(v) The assembly code is successfully written to the file but I can't figure out how to execute it. I've tried the following: $ as -o six.o six.asm $ ld six.o -o six.bin $ chmod +x six.bin $ ./six.bin

问题 In a bizarre turn of events, I've ended up in the following predicament where I'm using the following Python code to write the assembly generated by Numba to a file: @jit(nopython=True, nogil=True) def six(): return 6 with open("six.asm", "w") as f: for k, v in six.inspect_asm().items(): f.write(v) The assembly code is successfully written to the file but I can't figure out how to execute it. I've tried the following: $ as -o six.o six.asm $ ld six.o -o six.bin $ chmod +x six.bin $ ./six.bin

问题 I have allocated a certain amount of memory and would like to assign the location of this memory to variable I have declared in the .data section of the program. I know how to assign the memory location to the variable, but once I do that how can I use that variable to access the allocated memory? 回答1: MIPS has many instructions for loading and storing to memory: load word (lw), load halfword (lh), load byte(lb), store word (sw), store half word (sh), and store byte (sb) just to name a few.

问题 I have allocated a certain amount of memory and would like to assign the location of this memory to variable I have declared in the .data section of the program. I know how to assign the memory location to the variable, but once I do that how can I use that variable to access the allocated memory? 回答1: MIPS has many instructions for loading and storing to memory: load word (lw), load halfword (lh), load byte(lb), store word (sw), store half word (sh), and store byte (sb) just to name a few.

问题 I've been searching all over for an explanation of how exactly BIOS works now for quite some time. I have designed a bootloader and have jumped to 32-bit mode with it while successfully initializing the IDT as well as the GDT, but in doing so, I have found "operating systems" seeming to be quite simple, and the feeling as if "BIOS" IS the actual operating system of every computer. So now I have took on a new challenge of trying to discover how BIOS actually initializes itself, discovers how

问题 I've been searching all over for an explanation of how exactly BIOS works now for quite some time. I have designed a bootloader and have jumped to 32-bit mode with it while successfully initializing the IDT as well as the GDT, but in doing so, I have found "operating systems" seeming to be quite simple, and the feeling as if "BIOS" IS the actual operating system of every computer. So now I have took on a new challenge of trying to discover how BIOS actually initializes itself, discovers how

问题 I've been searching all over for an explanation of how exactly BIOS works now for quite some time. I have designed a bootloader and have jumped to 32-bit mode with it while successfully initializing the IDT as well as the GDT, but in doing so, I have found "operating systems" seeming to be quite simple, and the feeling as if "BIOS" IS the actual operating system of every computer. So now I have took on a new challenge of trying to discover how BIOS actually initializes itself, discovers how

问题 I've been searching all over for an explanation of how exactly BIOS works now for quite some time. I have designed a bootloader and have jumped to 32-bit mode with it while successfully initializing the IDT as well as the GDT, but in doing so, I have found "operating systems" seeming to be quite simple, and the feeling as if "BIOS" IS the actual operating system of every computer. So now I have took on a new challenge of trying to discover how BIOS actually initializes itself, discovers how

问题 What is the difference between a machine instruction and a micro-op? I found a following definition here: A small, basic instruction, used in series to make up a high-level machine instruction Here is what I found on Wikipedia In computer central processing units, micro-operations (also known as a micro-ops or μops) are detailed low-level instructions used in some designs to implement complex machine instructions (sometimes termed macro-instructions in this context) Am I correct in

问题 I would like to understand how cmp and je/jg work in assembly. I saw few examples on google but I am still little bit confused. Below I have shown a part of assembly code that I am trying to convert to C language and the corresponding C code. Is it implemented in the right way or do I have a wrong understanding of how cmp works? cmp $0x3,%eax je A cmp $0x3,%eax jg B cmp $0x1,%eax je C int func(int x){ if(x == 3) goto A; if (x >3) goto B; if(x == 1) goto C; A: ...... B: ...... C: ...... 回答1: