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tools/nolibc: Make getpgrp() fall back to getpgid(0)

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The getpgrp() syscall is not implemented on arm64, so this commit instead
uses getpgid(0) when getpgrp() is not available.  This is a port of
nolibc's upstream commit 2379f25073f9 to the Linux kernel.

Fixes: 66b6f755ad ("rcutorture: Import a copy of nolibc")
Tested-by: Valentin Schneider <valentin.schneider@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64]
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Willy Tarreau 2021-01-21 08:20:25 +01:00 committed by Paul E. McKenney
parent 79f220e56d
commit c0c7c10375
1 changed files with 19 additions and 1 deletions
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20
tools/include/nolibc/nolibc.h
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@ -1544,10 +1544,16 @@ int sys_getdents64(int fd, struct linux_dirent64 *dirp, int count)
return my_syscall3(__NR_getdents64, fd, dirp, count); return my_syscall3(__NR_getdents64, fd, dirp, count);
} }
static __attribute__((unused))
pid_t sys_getpgid(pid_t pid)
{
return my_syscall1(__NR_getpgid, pid);
}
static __attribute__((unused)) static __attribute__((unused))
pid_t sys_getpgrp(void) pid_t sys_getpgrp(void)
{ {
return my_syscall0(__NR_getpgrp); return sys_getpgid(0);
} }
static __attribute__((unused)) static __attribute__((unused))
@ -1950,6 +1956,18 @@ int getdents64(int fd, struct linux_dirent64 *dirp, int count)
return ret; return ret;
} }
static __attribute__((unused))
pid_t getpgid(pid_t pid)
{
pid_t ret = sys_getpgid(pid);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
}
static __attribute__((unused)) static __attribute__((unused))
pid_t getpgrp(void) pid_t getpgrp(void)
{ {