{"id":17945,"date":"2024-10-26T14:21:31","date_gmt":"2024-10-26T14:21:31","guid":{"rendered":"http:\/\/www.max-sperling.bplaced.net\/?p=17945"},"modified":"2025-09-10T15:24:43","modified_gmt":"2025-09-10T15:24:43","slug":"assembler-instructions-selection","status":"publish","type":"post","link":"http:\/\/www.max-sperling.bplaced.net\/?p=17945","title":{"rendered":"Basic assembler instructions (x64, A64)"},"content":{"rendered":"

Instructions<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Purpose<\/th>\nx64 (Intel flavor)<\/th>\nA64<\/th>\n<\/tr>\n
Copy content (dst = src)<\/td>\nMOV RAX, RBX<\/td>\nMOV X0, X1<\/td>\n<\/tr>\n
Copy content (dst = *src)<\/td>\nMOV RAX, [RBX]<\/td>\nLDR X0, [X1]<\/td>\n<\/tr>\n
Copy content (*dst = src)<\/td>\nMOV [RAX], RBX<\/td>\nSTR X1, [X0]<\/td>\n<\/tr>\n
Push on stack<\/td>\nPUSH RAX<\/td>\nPUSH {X0}<\/td>\n<\/tr>\n
Pop from stack<\/td>\nPOP RAX<\/td>\nPOP {X0}<\/td>\n<\/tr>\n
Summation<\/td>\nADD RAX, RBX
ADD RAX, 0x10<\/td>\n		ADD X0, X0, X1
ADD X0, #16<\/td>\n<\/tr>\n
Subtraction<\/td>\nSUB RAX, RBX
SUB RAX, 0x10<\/td>\n		SUB X0, X0, X1
SUB X0, #16<\/td>\n<\/tr>\n
Enter Function<\/td>\nCALL function<\/td>\nBL function<\/td>\n<\/tr>\n
Leave Function<\/td>\nRET<\/td>\nBX LR<\/td>\n<\/tr>\n
Unconditional Jump\/Branch<\/td>\nJMP address<\/td>\nBX address<\/td>\n<\/tr>\n
Comparison (Subtraction)<\/td>\nCMP RAX, RBX<\/td>\nCMP X0, X1<\/td>\n<\/tr>\n
Comparison (Bitwise AND)<\/td>\nTEST RAX, RAX<\/td>\nTST X0, X0<\/td>\n<\/tr>\n
Jump\/Branch if zero (\/equal) <\/td>\nJE address<\/td>\nBEQ address<\/td>\n<\/tr>\n
Jump\/Branch if not zero (\/not equal) <\/td>\nJNE address<\/td>\nBNE address<\/td>\n<\/tr>\n<\/table>\n

Syntax flavor<\/h3>\n
\r\n(gdb) set disassembly-flavor att\r\n(gdb) set disassembly-flavor intel\r\n(gdb) show disassembly-flavor\r\n<\/pre>\n
– Intel flavor: COMMAND destination, source
\n– AT&T flavor: COMMAND source, destination<\/p>\n","protected":false},"excerpt":{"rendered":"
Instructions Purpose x64 (Intel flavor) A64 Copy content (dst = src) MOV RAX, RBX MOV X0, X1 Copy content (dst<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[28],"tags":[],"_links":{"self":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/17945"}],"collection":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=17945"}],"version-history":[{"count":9,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/17945\/revisions"}],"predecessor-version":[{"id":19184,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/17945\/revisions\/19184"}],"wp:attachment":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17945"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}