tree 131a75f1b296d21c324143ae6502294c1c346135
parent 09cfefb7fa70c3af011b0db0a513fd80b2f18abc
author Huacai Chen <chenhuacai@loongson.cn> 1653991451 +0800
committer Huacai Chen <chenhuacai@loongson.cn> 1654258168 +0800

LoongArch: Add system call support

Add system call support and related uaccess.h for LoongArch.

Q: Why keep _ARCH_WANT_SYS_CLONE definition while there is clone3:
A: The latest glibc release has some basic support for clone3 but it is
   not complete. E.g., pthread_create() and spawni() have converted to
   use clone3 but fork() will still use clone. Moreover, some seccomp
   related applications can still not work perfectly with clone3. E.g.,
   Chromium sandbox cannot work at all and there is no solution for it,
   which is more terrible than the fork() story [1].

[1] https://chromium-review.googlesource.com/c/chromium/src/+/2936184

Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>