{"id":103436,"date":"2022-02-25T21:37:00","date_gmt":"2022-02-25T19:37:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11"},"modified":"2022-02-25T21:37:00","modified_gmt":"2022-02-25T19:37:00","slug":"v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11","title":{"rendered":"A Linux 5.18 kernelben tervezik a C11 nyelv szabv\u00e1ny\u00e1nak haszn\u00e1lat\u00e1t.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
A patch set discussion addressing vulnerabilities related to the Spectre class revealed that the issue could be solved more elegantly if the kernel allowed C code corresponding to a newer version of the standard. Currently, the kernel code being added must comply with the ANSI C (C89) specification established back in 1989. <\/p>\n
A Spectre-related problem in the code was caused by the continued use of a separately defined iterator after the loop \u2014 a macro is used to traverse the elements of a linked list, and since the loop's iterator is passed to this macro, it is defined outside the loop itself and remains accessible after the loop. The use of the C99 standard would have allowed defining loop variables in the for() block, which would resolve the issue without inventing workarounds. <\/p>\n
Linus Torvalds agreed with the idea of implementing support for newer specifications and proposed transitioning in kernel 5.18 to the use of the C11 standard, published in 2011. Initial checks showed that builds in GCC and Clang in the new mode passed without deviations. If no unforeseen issues arise during more thorough testing, the build scripts for kernel 5.18 will replace the option \u2018--std=gnu89\u2019 with \u2018--std=gnu11 -Wno-shift-negative-value\u2019. The possibility of using the C17 standard was also considered, but in that case, the minimum supported version of GCC would need to be raised. However, including support for C11 aligns with the current GCC version requirements (5.1). \n Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"