76f8584e49
The ELF note identifyies the operating-system ABI that the executable was created for. The note data of the Glibc executable contains the earliest release number of the Linux kernel that supports this ABI. As of a current 2.37 version of Glibc, it is 3.2.0 for x86, 3.7.0 for Aarch64. Glibc does not use this release number and the current kernel's LINUX_VERSION_CODE to detect kernel features, using fallbacks to known previous way in case of ENOSYS or something else instead. A dynamically linked Glibc reads the current kernel's LINUX_VERSION_CODE from the ELF note in the vDSO or fallback to uname syscall if the vDSO can't be located and parse the release field in struct utsname. Glibc uses the current kernel's LINUX_VERSION_CODE for "kernel too old" check. While here use inlined LINUX_KERNVER for tests to improve readability, as suggested by emaste@. MFC after: 1 month |
||
|---|---|---|
| .. | ||
| freebsd32 | ||
| ia32 | ||
| lindebugfs | ||
| linprocfs | ||
| linsysfs | ||
| linux | ||
| linuxkpi | ||
| x86bios | ||