Learn 64bit Assembly from 32bit Instruction -

Learn 64bit Assembly from 32bit Instruction -

i've been trying utilize hacking: fine art of deception book larn assembly , programming. has great programming section gives greater appreciation inner workings of programme , gives greater understanding of how beingness precise when programming important. however, i've been having hard time next along because book uses 32bit examples , utilize 64bit system. know how compile gcc 32bit, or tune downwards 32bit cd provided book, think i'd rather larn 64bit because more relevant 32bit systems are(or becoming increasingly more relevant?). i'm trying inquire if should bother trying utilize book figure out 64bit assembly, because have heard much different, or if should find other material larn 64bit assembly separately? if there easy understand books cover 64bit intel assembly, i'd grateful reference.

like lurker said in above comment. since have book 32-bit, larn it. 32-bit still relevant.

once larn how 32-bit works, next rundown of 64-bit adds breeze.

the number of registers has been doubled 16.

all registers 64 bits long. 64-bit extensions of ia32 registers named %rax, %rcx, %rdx, %rbx, %rsi, %rdi, %rsp, , %rbp. new registers named %r8–%r15.

the low-order 32 bits of each register can accessed directly. gives familiar registers ia32: %eax, %ecx, %edx, %ebx, %esi, %edi, %esp, , %ebp, 8 new 32-bit registers: %r8d–%r15d.

the low-order 16 bits of each register can accessed directly, case ia32. word-size versions of new registers named %r8w–%r15w.

the low-order 8 bits of each register can accessed directly. true in ia32 first 4 registers (%al, %cl, %dl, %bl). byte-size versions of other ia32 registers named %sil, %dil, %spl, , %bpl. byte-size versions of new registers named %r8b–%r15b.

for backward compatibility, sec byte of registers %rax, %rcx, %rdx, , %rbx can straight accessed instructions having single-byte operands.

text computer systems programmer’s perspective

assembly