{"id":2831,"date":"2020-10-06T22:42:38","date_gmt":"2020-10-06T19:42:38","guid":{"rendered":"http:\/\/demensdeum.com\/blog\/?p=2831"},"modified":"2024-12-16T22:32:25","modified_gmt":"2024-12-16T19:32:25","slug":"x86_64-assembler-c-one-love","status":"publish","type":"post","link":"https:\/\/demensdeum.com\/blog\/fr\/2020\/10\/06\/x86_64-assembler-c-one-love\/","title":{"rendered":"x86_64 Assembleur + C = Un Amour"},"content":{"rendered":"

Dans cette note, je d\u00e9crirai le processus d’appel de fonctions C depuis l’assembleur.
Essayons d’appeler printf(“Hello World!\\n”); et quitter(0);<\/p>\n

\n
    message: db \"Hello, world!\", 10, 0\n\nsection .text\n    extern printf\n    extern exit\n    global main\n\nmain:\n    xor\trax, rax\n    mov\trdi, message    \n    call printf\n    xor rdi, rdi\n    call exit\n<\/code><\/pre>\n<\/div>\n
Tout est beaucoup plus simple qu’il n’y para\u00eet, dans la section .rodata nous d\u00e9crirons les donn\u00e9es statiques, dans ce cas la ligne “Hello, world!”, 10 est un caract\u00e8re de nouvelle ligne, et nous n’oublions pas non plus de l’annuler. <\/p>\n
Dans la section code nous d\u00e9clarerons les fonctions externes printf, exit des biblioth\u00e8ques stdio, stdlib, et nous d\u00e9clarerons \u00e9galement la fonction d’entr\u00e9e main\u00a0:<\/p>\n
\n
    extern printf\n    extern exit\n    global main\n<\/code><\/pre>\n<\/div>\n
Nous passons 0 au registre de retour depuis la fonction rax, vous pouvez utiliser mov rax, 0; mais pour acc\u00e9l\u00e9rer, ils utilisent xor rax, rax\u00a0; Ensuite, nous passons un pointeur vers la cha\u00eene au premier argument\u00a0:<\/p>\n
\n
\u0414\u0430\u043b\u0435\u0435 \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u043c \u0432\u043d\u0435\u0448\u043d\u044e\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u044e \u0421\u0438 printf:<\/p>\n
    xor\trax, rax\n    mov\trdi, message    \n    call printf\n    xor rdi, rdi\n    call exit\n<\/code><\/pre>\n<\/div>\n
Par analogie, on passe 0 au premier argument et on appelle exit\u00a0:<\/p>\n
\n
    call exit\n<\/code><\/pre>\n<\/div>\n
Comme disent les Am\u00e9ricains\u00a0:
Qui n'\u00e9coute personne
Ce pilaf est en train de manger @ Alexandre Pelevin<\/a><\/p>\n
Sources<\/h3>\n
https:\/\/www.devdungeon. com\/content\/how-mix-c-and-assembly<\/a>
https:\/\/nekosecurity.com\/x86-64-assembly\/part-3-nasm-anatomy-syscall-passing-argument<\/a>
\nhttps:\/\/www.cs.uaf.edu\/2017\/fall\/cs301\/reference\/x86_64.html<\/a><\/p>\n
Code source<\/h3>\n
https:\/\/gitlab.com\/demensdeum\/assembly-playground<\/a <\/p>\n","protected":false},"excerpt":{"rendered":"
Dans cette note, je d\u00e9crirai le processus d’appel de fonctions C depuis l’assembleur.Essayons d’appeler printf(“Hello World!\\n”); et quitter(0); message: db “Hello, world!”, 10, 0 section .text extern printf extern exit global main main: xor rax, rax mov rdi, message call printf xor rdi, rdi call exit Tout est beaucoup plus simple qu’il n’y para\u00eet, dansContinue reading “x86_64 Assembleur + C = Un Amour”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[61,52],"tags":[165,166,164],"class_list":["post-2831","post","type-post","status-publish","format-standard","hentry","category-techie","category-tutorials","tag-asm","tag-assembly","tag-nasm","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"fr","enabled_languages":["en","ru","zh","de","fr","ja","pt","hi"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"zh":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false}}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/posts\/2831","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/comments?post=2831"}],"version-history":[{"count":16,"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/posts\/2831\/revisions"}],"predecessor-version":[{"id":3905,"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/posts\/2831\/revisions\/3905"}],"wp:attachment":[{"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/media?parent=2831"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/categories?post=2831"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/fr\/wp-json\/wp\/v2\/tags?post=2831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}