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916cda1aa1
This adds a new system call to enable the use of guarded storage for
user space processes. The system call takes two arguments, a command
and pointer to a guarded storage control block:
s390_guarded_storage(int command, struct gs_cb *gs_cb);
The second argument is relevant only for the GS_SET_BC_CB command.
The commands in detail:
0 - GS_ENABLE
Enable the guarded storage facility for the current task. The
initial content of the guarded storage control block will be
all zeros. After the enablement the user space code can use
load-guarded-storage-controls instruction (LGSC) to load an
arbitrary control block. While a task is enabled the kernel
will save and restore the current content of the guarded
storage registers on context switch.
1 - GS_DISABLE
Disables the use of the guarded storage facility for the current
task. The kernel will cease to save and restore the content of
the guarded storage registers, the task specific content of
these registers is lost.
2 - GS_SET_BC_CB
Set a broadcast guarded storage control block. This is called
per thread and stores a specific guarded storage control block
in the task struct of the current task. This control block will
be used for the broadcast event GS_BROADCAST.
3 - GS_CLEAR_BC_CB
Clears the broadcast guarded storage control block. The guarded-
storage control block is removed from the task struct that was
established by GS_SET_BC_CB.
4 - GS_BROADCAST
Sends a broadcast to all thread siblings of the current task.
Every sibling that has established a broadcast guarded storage
control block will load this control block and will be enabled
for guarded storage. The broadcast guarded storage control block
is used up, a second broadcast without a refresh of the stored
control block with GS_SET_BC_CB will not have any effect.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
183 lines
13 KiB
C
183 lines
13 KiB
C
/*
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* Compat system call wrappers.
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*
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* Copyright IBM Corp. 2014
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*/
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#include <linux/syscalls.h>
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#include <linux/compat.h>
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#include "entry.h"
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#define COMPAT_SYSCALL_WRAP1(name, ...) \
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COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP2(name, ...) \
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COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP3(name, ...) \
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COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP4(name, ...) \
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COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP5(name, ...) \
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COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP6(name, ...) \
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COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
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#define __SC_COMPAT_TYPE(t, a) \
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__typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
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#define __SC_COMPAT_CAST(t, a) \
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({ \
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long __ReS = a; \
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\
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BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \
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!__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \
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if (__TYPE_IS_L(t)) \
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__ReS = (s32)a; \
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if (__TYPE_IS_UL(t)) \
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__ReS = (u32)a; \
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if (__TYPE_IS_PTR(t)) \
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__ReS = a & 0x7fffffff; \
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(t)__ReS; \
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})
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/*
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* The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by
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* compat tasks. These wrappers will only be used for system calls where only
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* the system call arguments need sign or zero extension or zeroing of the upper
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* 33 bits of pointers.
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* Note: since the wrapper function will afterwards call a system call which
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* again performs zero and sign extension for all system call arguments with
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* a size of less than eight bytes, these compat wrappers only touch those
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* system call arguments with a size of eight bytes ((unsigned) long and
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* pointers). Zero and sign extension for e.g. int parameters will be done by
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* the regular system call wrappers.
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*/
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#define COMPAT_SYSCALL_WRAPx(x, name, ...) \
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asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
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asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__));\
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asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)) \
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{ \
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return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__)); \
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}
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COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
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COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
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COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
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COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
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COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
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COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
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COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
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COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
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COMPAT_SYSCALL_WRAP2(rename, const char __user *, oldname, const char __user *, newname);
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COMPAT_SYSCALL_WRAP2(mkdir, const char __user *, pathname, umode_t, mode);
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COMPAT_SYSCALL_WRAP1(rmdir, const char __user *, pathname);
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COMPAT_SYSCALL_WRAP1(pipe, int __user *, fildes);
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COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);
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COMPAT_SYSCALL_WRAP2(signal, int, sig, __sighandler_t, handler);
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COMPAT_SYSCALL_WRAP1(acct, const char __user *, name);
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COMPAT_SYSCALL_WRAP2(umount, char __user *, name, int, flags);
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COMPAT_SYSCALL_WRAP1(chroot, const char __user *, filename);
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COMPAT_SYSCALL_WRAP3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask);
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COMPAT_SYSCALL_WRAP2(sethostname, char __user *, name, int, len);
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COMPAT_SYSCALL_WRAP2(symlink, const char __user *, old, const char __user *, new);
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COMPAT_SYSCALL_WRAP3(readlink, const char __user *, path, char __user *, buf, int, bufsiz);
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COMPAT_SYSCALL_WRAP1(uselib, const char __user *, library);
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COMPAT_SYSCALL_WRAP2(swapon, const char __user *, specialfile, int, swap_flags);
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COMPAT_SYSCALL_WRAP4(reboot, int, magic1, int, magic2, unsigned int, cmd, void __user *, arg);
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COMPAT_SYSCALL_WRAP2(munmap, unsigned long, addr, size_t, len);
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COMPAT_SYSCALL_WRAP3(syslog, int, type, char __user *, buf, int, len);
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COMPAT_SYSCALL_WRAP1(swapoff, const char __user *, specialfile);
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COMPAT_SYSCALL_WRAP2(setdomainname, char __user *, name, int, len);
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COMPAT_SYSCALL_WRAP1(newuname, struct new_utsname __user *, name);
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COMPAT_SYSCALL_WRAP3(mprotect, unsigned long, start, size_t, len, unsigned long, prot);
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COMPAT_SYSCALL_WRAP3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs);
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COMPAT_SYSCALL_WRAP2(delete_module, const char __user *, name_user, unsigned int, flags);
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COMPAT_SYSCALL_WRAP4(quotactl, unsigned int, cmd, const char __user *, special, qid_t, id, void __user *, addr);
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COMPAT_SYSCALL_WRAP2(bdflush, int, func, long, data);
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COMPAT_SYSCALL_WRAP3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2);
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COMPAT_SYSCALL_WRAP5(llseek, unsigned int, fd, unsigned long, high, unsigned long, low, loff_t __user *, result, unsigned int, whence);
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COMPAT_SYSCALL_WRAP3(msync, unsigned long, start, size_t, len, int, flags);
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COMPAT_SYSCALL_WRAP2(mlock, unsigned long, start, size_t, len);
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COMPAT_SYSCALL_WRAP2(munlock, unsigned long, start, size_t, len);
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COMPAT_SYSCALL_WRAP2(sched_setparam, pid_t, pid, struct sched_param __user *, param);
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COMPAT_SYSCALL_WRAP2(sched_getparam, pid_t, pid, struct sched_param __user *, param);
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COMPAT_SYSCALL_WRAP3(sched_setscheduler, pid_t, pid, int, policy, struct sched_param __user *, param);
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COMPAT_SYSCALL_WRAP5(mremap, unsigned long, addr, unsigned long, old_len, unsigned long, new_len, unsigned long, flags, unsigned long, new_addr);
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COMPAT_SYSCALL_WRAP3(poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout);
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COMPAT_SYSCALL_WRAP5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, unsigned long, arg4, unsigned long, arg5);
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COMPAT_SYSCALL_WRAP2(getcwd, char __user *, buf, unsigned long, size);
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COMPAT_SYSCALL_WRAP2(capget, cap_user_header_t, header, cap_user_data_t, dataptr);
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COMPAT_SYSCALL_WRAP2(capset, cap_user_header_t, header, const cap_user_data_t, data);
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COMPAT_SYSCALL_WRAP3(lchown, const char __user *, filename, uid_t, user, gid_t, group);
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COMPAT_SYSCALL_WRAP2(getgroups, int, gidsetsize, gid_t __user *, grouplist);
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COMPAT_SYSCALL_WRAP2(setgroups, int, gidsetsize, gid_t __user *, grouplist);
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COMPAT_SYSCALL_WRAP3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid);
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COMPAT_SYSCALL_WRAP3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid);
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COMPAT_SYSCALL_WRAP3(chown, const char __user *, filename, uid_t, user, gid_t, group);
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COMPAT_SYSCALL_WRAP2(pivot_root, const char __user *, new_root, const char __user *, put_old);
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COMPAT_SYSCALL_WRAP3(mincore, unsigned long, start, size_t, len, unsigned char __user *, vec);
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COMPAT_SYSCALL_WRAP3(madvise, unsigned long, start, size_t, len, int, behavior);
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COMPAT_SYSCALL_WRAP5(setxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
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COMPAT_SYSCALL_WRAP5(lsetxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
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COMPAT_SYSCALL_WRAP5(fsetxattr, int, fd, const char __user *, name, const void __user *, value, size_t, size, int, flags);
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COMPAT_SYSCALL_WRAP3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count);
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COMPAT_SYSCALL_WRAP4(getxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
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COMPAT_SYSCALL_WRAP4(lgetxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
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COMPAT_SYSCALL_WRAP4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size);
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COMPAT_SYSCALL_WRAP3(listxattr, const char __user *, path, char __user *, list, size_t, size);
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COMPAT_SYSCALL_WRAP3(llistxattr, const char __user *, path, char __user *, list, size_t, size);
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COMPAT_SYSCALL_WRAP3(flistxattr, int, fd, char __user *, list, size_t, size);
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COMPAT_SYSCALL_WRAP2(removexattr, const char __user *, path, const char __user *, name);
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COMPAT_SYSCALL_WRAP2(lremovexattr, const char __user *, path, const char __user *, name);
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COMPAT_SYSCALL_WRAP2(fremovexattr, int, fd, const char __user *, name);
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COMPAT_SYSCALL_WRAP1(set_tid_address, int __user *, tidptr);
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COMPAT_SYSCALL_WRAP4(epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event __user *, event);
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COMPAT_SYSCALL_WRAP4(epoll_wait, int, epfd, struct epoll_event __user *, events, int, maxevents, int, timeout);
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COMPAT_SYSCALL_WRAP1(io_destroy, aio_context_t, ctx);
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COMPAT_SYSCALL_WRAP3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, struct io_event __user *, result);
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COMPAT_SYSCALL_WRAP1(mq_unlink, const char __user *, name);
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COMPAT_SYSCALL_WRAP5(add_key, const char __user *, tp, const char __user *, dsc, const void __user *, pld, size_t, len, key_serial_t, id);
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COMPAT_SYSCALL_WRAP4(request_key, const char __user *, tp, const char __user *, dsc, const char __user *, info, key_serial_t, id);
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COMPAT_SYSCALL_WRAP5(remap_file_pages, unsigned long, start, unsigned long, size, unsigned long, prot, unsigned long, pgoff, unsigned long, flags);
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COMPAT_SYSCALL_WRAP3(inotify_add_watch, int, fd, const char __user *, path, u32, mask);
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COMPAT_SYSCALL_WRAP3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode);
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COMPAT_SYSCALL_WRAP4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, unsigned, dev);
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COMPAT_SYSCALL_WRAP5(fchownat, int, dfd, const char __user *, filename, uid_t, user, gid_t, group, int, flag);
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COMPAT_SYSCALL_WRAP3(unlinkat, int, dfd, const char __user *, pathname, int, flag);
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COMPAT_SYSCALL_WRAP4(renameat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname);
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COMPAT_SYSCALL_WRAP5(linkat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, int, flags);
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COMPAT_SYSCALL_WRAP3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname);
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COMPAT_SYSCALL_WRAP4(readlinkat, int, dfd, const char __user *, path, char __user *, buf, int, bufsiz);
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COMPAT_SYSCALL_WRAP3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode);
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COMPAT_SYSCALL_WRAP3(faccessat, int, dfd, const char __user *, filename, int, mode);
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COMPAT_SYSCALL_WRAP1(unshare, unsigned long, unshare_flags);
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COMPAT_SYSCALL_WRAP6(splice, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
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COMPAT_SYSCALL_WRAP4(tee, int, fdin, int, fdout, size_t, len, unsigned int, flags);
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COMPAT_SYSCALL_WRAP3(getcpu, unsigned __user *, cpu, unsigned __user *, node, struct getcpu_cache __user *, cache);
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COMPAT_SYSCALL_WRAP2(pipe2, int __user *, fildes, int, flags);
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COMPAT_SYSCALL_WRAP5(perf_event_open, struct perf_event_attr __user *, attr_uptr, pid_t, pid, int, cpu, int, group_fd, unsigned long, flags);
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COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags, int __user *, parent_tidptr, int __user *, child_tidptr, unsigned long, tls);
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COMPAT_SYSCALL_WRAP4(prlimit64, pid_t, pid, unsigned int, resource, const struct rlimit64 __user *, new_rlim, struct rlimit64 __user *, old_rlim);
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COMPAT_SYSCALL_WRAP5(name_to_handle_at, int, dfd, const char __user *, name, struct file_handle __user *, handle, int __user *, mnt_id, int, flag);
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COMPAT_SYSCALL_WRAP5(kcmp, pid_t, pid1, pid_t, pid2, int, type, unsigned long, idx1, unsigned long, idx2);
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COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, flags);
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COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
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COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
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COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
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COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char __user *, uargs)
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COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags)
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COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags)
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COMPAT_SYSCALL_WRAP3(bpf, int, cmd, union bpf_attr *, attr, unsigned int, size);
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COMPAT_SYSCALL_WRAP3(s390_pci_mmio_write, const unsigned long, mmio_addr, const void __user *, user_buffer, const size_t, length);
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COMPAT_SYSCALL_WRAP3(s390_pci_mmio_read, const unsigned long, mmio_addr, void __user *, user_buffer, const size_t, length);
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COMPAT_SYSCALL_WRAP4(socketpair, int, family, int, type, int, protocol, int __user *, usockvec);
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COMPAT_SYSCALL_WRAP3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen);
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COMPAT_SYSCALL_WRAP3(connect, int, fd, struct sockaddr __user *, uservaddr, int, addrlen);
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COMPAT_SYSCALL_WRAP4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen, int, flags);
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COMPAT_SYSCALL_WRAP3(getsockname, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
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COMPAT_SYSCALL_WRAP3(getpeername, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
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COMPAT_SYSCALL_WRAP6(sendto, int, fd, void __user *, buff, size_t, len, unsigned int, flags, struct sockaddr __user *, addr, int, addr_len);
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COMPAT_SYSCALL_WRAP3(mlock2, unsigned long, start, size_t, len, int, flags);
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COMPAT_SYSCALL_WRAP6(copy_file_range, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
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COMPAT_SYSCALL_WRAP2(s390_guarded_storage, int, command, struct gs_cb *, gs_cb);
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COMPAT_SYSCALL_WRAP5(statx, int, dfd, const char __user *, path, unsigned, flags, unsigned, mask, struct statx __user *, buffer);
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