mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 13:41:51 +00:00
af5395c214
Add TIF_SYSCALL_TRACEPOINT flag definition; add _TIF_SYSCALL_TRACEPOINT to _TIF_WORK_MASK. Call trace_sys_enter from do_syscall_trace_enter and trace_sys_exit from do_syscall_trace_leave when TIF_SYSCALL_TRACEPOINT flag is set. Add declaration of sys_call_table to arch/xtensa/include/asm/syscall.h Add definition of NR_syscalls to arch/xtensa/include/asm/unistd.h Select HAVE_SYSCALL_TRACEPOINTS. This change allows tracing each syscall entry and exit through the ftrace mechanism. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
|
|
* arch/xtensa/kernel/syscall.c
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2001 - 2005 Tensilica Inc.
|
|
* Copyright (C) 2000 Silicon Graphics, Inc.
|
|
* Copyright (C) 1995 - 2000 by Ralf Baechle
|
|
*
|
|
* Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
|
|
* Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
|
|
* Chris Zankel <chris@zankel.net>
|
|
* Kevin Chea
|
|
*
|
|
*/
|
|
#include <linux/uaccess.h>
|
|
#include <asm/syscall.h>
|
|
#include <asm/unistd.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/stringify.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/file.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/sched/mm.h>
|
|
#include <linux/shm.h>
|
|
|
|
syscall_t sys_call_table[__NR_syscalls] /* FIXME __cacheline_aligned */= {
|
|
[0 ... __NR_syscalls - 1] = (syscall_t)&sys_ni_syscall,
|
|
|
|
#define __SYSCALL(nr, entry, nargs)[nr] = (syscall_t)entry,
|
|
#include <asm/syscall_table.h>
|
|
#undef __SYSCALL
|
|
};
|
|
|
|
#define COLOUR_ALIGN(addr, pgoff) \
|
|
((((addr) + SHMLBA - 1) & ~(SHMLBA - 1)) + \
|
|
(((pgoff) << PAGE_SHIFT) & (SHMLBA - 1)))
|
|
|
|
asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
|
|
{
|
|
unsigned long ret;
|
|
long err;
|
|
|
|
err = do_shmat(shmid, shmaddr, shmflg, &ret, SHMLBA);
|
|
if (err)
|
|
return err;
|
|
return (long)ret;
|
|
}
|
|
|
|
asmlinkage long xtensa_fadvise64_64(int fd, int advice,
|
|
unsigned long long offset, unsigned long long len)
|
|
{
|
|
return ksys_fadvise64_64(fd, offset, len, advice);
|
|
}
|
|
|
|
#ifdef CONFIG_MMU
|
|
unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
|
|
unsigned long len, unsigned long pgoff, unsigned long flags)
|
|
{
|
|
struct vm_area_struct *vmm;
|
|
|
|
if (flags & MAP_FIXED) {
|
|
/* We do not accept a shared mapping if it would violate
|
|
* cache aliasing constraints.
|
|
*/
|
|
if ((flags & MAP_SHARED) &&
|
|
((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
|
|
return -EINVAL;
|
|
return addr;
|
|
}
|
|
|
|
if (len > TASK_SIZE)
|
|
return -ENOMEM;
|
|
if (!addr)
|
|
addr = TASK_UNMAPPED_BASE;
|
|
|
|
if (flags & MAP_SHARED)
|
|
addr = COLOUR_ALIGN(addr, pgoff);
|
|
else
|
|
addr = PAGE_ALIGN(addr);
|
|
|
|
for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
|
|
/* At this point: (!vmm || addr < vmm->vm_end). */
|
|
if (TASK_SIZE - len < addr)
|
|
return -ENOMEM;
|
|
if (!vmm || addr + len <= vm_start_gap(vmm))
|
|
return addr;
|
|
addr = vmm->vm_end;
|
|
if (flags & MAP_SHARED)
|
|
addr = COLOUR_ALIGN(addr, pgoff);
|
|
}
|
|
}
|
|
#endif
|