| Message ID | 20230415-nolibc-fork-v1-1-9747c73651c5@weissschuh.net (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | tools/nolibc: fork: fix on s390 and add test | expand |
Thomas Weißschuh <linux@weissschuh.net> writes: > On s390 the first two arguments to the clone() syscall are swapped, > as documented in clone(2). > > Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> > --- > tools/include/nolibc/arch-s390.h | 8 ++++++++ > tools/include/nolibc/sys.h | 2 ++ > 2 files changed, 10 insertions(+) Acked-by: Sven Schnelle <svens@linux.ibm.com>
diff --git a/tools/include/nolibc/arch-s390.h b/tools/include/nolibc/arch-s390.h index 6b0e54ed543d..db4ea51a4dbb 100644 --- a/tools/include/nolibc/arch-s390.h +++ b/tools/include/nolibc/arch-s390.h @@ -5,6 +5,7 @@ #ifndef _NOLIBC_ARCH_S390_H #define _NOLIBC_ARCH_S390_H +#include <asm/signal.h> #include <asm/unistd.h> /* The struct returned by the stat() syscall, equivalent to stat64(). The @@ -223,4 +224,11 @@ void *sys_mmap(void *addr, size_t length, int prot, int flags, int fd, return (void *)my_syscall1(__NR_mmap, &args); } #define sys_mmap sys_mmap + +static __attribute__((unused)) +pid_t sys_fork(void) +{ + return my_syscall5(__NR_clone, 0, SIGCHLD, 0, 0, 0); +} +#define sys_fork sys_fork #endif // _NOLIBC_ARCH_S390_H diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h index bea9760dbd16..f5a450153a63 100644 --- a/tools/include/nolibc/sys.h +++ b/tools/include/nolibc/sys.h @@ -336,6 +336,7 @@ void exit(int status) * pid_t fork(void); */ +#ifndef sys_fork static __attribute__((unused)) pid_t sys_fork(void) { @@ -351,6 +352,7 @@ pid_t sys_fork(void) #error Neither __NR_clone nor __NR_fork defined, cannot implement sys_fork() #endif } +#endif static __attribute__((unused)) pid_t fork(void)
On s390 the first two arguments to the clone() syscall are swapped, as documented in clone(2). Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> --- tools/include/nolibc/arch-s390.h | 8 ++++++++ tools/include/nolibc/sys.h | 2 ++ 2 files changed, 10 insertions(+)