diff options
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-32/clone3.S | 78 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/clone3.S | 78 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/sysdep.h | 1 |
3 files changed, 157 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/clone3.S b/sysdeps/unix/sysv/linux/s390/s390-32/clone3.S new file mode 100644 index 0000000..bbe75ce --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-32/clone3.S @@ -0,0 +1,78 @@ +/* The clone3 syscall wrapper. Linux/s390x version. + Copyright (C) 2023 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#define _ERRNO_H 1 +#include <bits/errno.h> + +/* The userland implementation is: + int clone3 (struct clone_args *cl_args, size_t size, + int (*func)(void *arg), void *arg); + + the kernel entry is: + int clone3 (struct clone_args *cl_args, size_t size); + + The parameters are passed in registers from userland: + r2: cl_args + r3: size + r4: func + r5: arg */ + + .text +ENTRY(__clone3) + /* Sanity check args. */ + ltr %r2, %r2 + je error + ltr %r4, %r4 + je error + + /* Do the system call, the kernel expects: + r1: system call number + r2: cl_args + r3: size */ + lhi %r1, SYS_ify(clone3) + svc 0 + ltr %r2,%r2 /* check return code */ + jz thread_start + jm SYSCALL_ERROR_LABEL + br %r14 +error: + lhi %r2,-EINVAL + j SYSCALL_ERROR_LABEL +PSEUDO_END (__clone3) + + .align 16 + .type thread_start, %function +thread_start: + cfi_startproc + /* Mark r14 as undefined in order to stop unwinding here. */ + cfi_undefined (r14) + + /* func is in gpr 4, arg in gpr 5. */ + lr %r2, %r5 + ahi %r15, -96 + xc 0(4,%r15),0(%r15) + basr %r14, %r4 + + DO_CALL (exit, 1) + cfi_endproc + ASM_SIZE_DIRECTIVE (thread_start) + +libc_hidden_def (__clone3) +weak_alias (__clone3, clone3) diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S b/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S new file mode 100644 index 0000000..62800f8 --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S @@ -0,0 +1,78 @@ +/* The clone3 syscall wrapper. Linux/s390x version. + Copyright (C) 2023 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#define _ERRNO_H 1 +#include <bits/errno.h> + +/* The userland implementation is: + int clone3 (struct clone_args *cl_args, size_t size, + int (*func)(void *arg), void *arg); + + the kernel entry is: + int clone3 (struct clone_args *cl_args, size_t size); + + The parameters are passed in registers from userland: + r2: cl_args + r3: size + r4: func + r5: arg */ + + .text +ENTRY(__clone3) + /* Sanity check args. */ + ltgr %r2, %r2 + je error + ltgr %r4, %r4 + je error + + /* Do the system call, the kernel expects: + r1: system call number + r2: cl_args + r3: size */ + lghi %r1, SYS_ify(clone3) + svc 0 + ltgr %r2,%r2 /* check return code */ + jz thread_start + jgm SYSCALL_ERROR_LABEL + br %r14 +error: + lghi %r2,-EINVAL + jg SYSCALL_ERROR_LABEL +PSEUDO_END (__clone3) + + .align 16 + .type thread_start, %function +thread_start: + cfi_startproc + /* Mark r14 as undefined in order to stop unwinding here. */ + cfi_undefined (r14) + + /* func is in gpr 4, arg in gpr 5. */ + lgr %r2, %r5 + aghi %r15, -160 + xc 0(8,%r15),0(%r15) + basr %r14, %r4 + + DO_CALL (exit, 1) + cfi_endproc + ASM_SIZE_DIRECTIVE (thread_start) + +libc_hidden_def (__clone3) +weak_alias (__clone3, clone3) diff --git a/sysdeps/unix/sysv/linux/s390/sysdep.h b/sysdeps/unix/sysv/linux/s390/sysdep.h index 3bde8ba..b262163 100644 --- a/sysdeps/unix/sysv/linux/s390/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/sysdep.h @@ -79,4 +79,5 @@ #define HAVE_GETTIMEOFDAY_VSYSCALL "__kernel_gettimeofday" #define HAVE_GETCPU_VSYSCALL "__kernel_getcpu" +#define HAVE_CLONE3_WRAPPER 1 #endif |