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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc/] [kernel/] [sys_sparc.c] - Blame information for rev 3

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/* $Id: sys_sparc.c,v 1.70 2001/04/14 01:12:02 davem Exp $
 * linux/arch/sparc/kernel/sys_sparc.c
 *
 * This file contains various random system calls that
 * have a non-standard calling sequence on the Linux/sparc
 * platform.
 */
 
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/stat.h>
#include <linux/syscalls.h>
#include <linux/mman.h>
#include <linux/utsname.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/ipc.h>
 
#include <asm/uaccess.h>
#include <asm/unistd.h>
 
/* #define DEBUG_UNIMP_SYSCALL */
 
/* XXX Make this per-binary type, this way we can detect the type of
 * XXX a binary.  Every Sparc executable calls this very early on.
 */
asmlinkage unsigned long sys_getpagesize(void)
{
        return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */
}
 
#define COLOUR_ALIGN(addr)      (((addr)+SHMLBA-1)&~(SHMLBA-1))
 
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 & (SHMLBA - 1)))
                        return -EINVAL;
                return addr;
        }
 
        /* See asm-sparc/uaccess.h */
        if (len > TASK_SIZE - PAGE_SIZE)
                return -ENOMEM;
        if (ARCH_SUN4C_SUN4 && len > 0x20000000)
                return -ENOMEM;
        if (!addr)
                addr = TASK_UNMAPPED_BASE;
 
        if (flags & MAP_SHARED)
                addr = COLOUR_ALIGN(addr);
        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 (ARCH_SUN4C_SUN4 && addr < 0xe0000000 && 0x20000000 - len < addr) {
                        addr = PAGE_OFFSET;
                        vmm = find_vma(current->mm, PAGE_OFFSET);
                }
                if (TASK_SIZE - PAGE_SIZE - len < addr)
                        return -ENOMEM;
                if (!vmm || addr + len <= vmm->vm_start)
                        return addr;
                addr = vmm->vm_end;
                if (flags & MAP_SHARED)
                        addr = COLOUR_ALIGN(addr);
        }
}
 
asmlinkage unsigned long sparc_brk(unsigned long brk)
{
        if(ARCH_SUN4C_SUN4) {
                if ((brk & 0xe0000000) != (current->mm->brk & 0xe0000000))
                        return current->mm->brk;
        }
        return sys_brk(brk);
}
 
/*
 * sys_pipe() is the normal C calling standard for creating
 * a pipe. It's not the way unix traditionally does this, though.
 */
asmlinkage int sparc_pipe(struct pt_regs *regs)
{
        int fd[2];
        int error;
 
        error = do_pipe(fd);
        if (error)
                goto out;
        regs->u_regs[UREG_I1] = fd[1];
        error = fd[0];
out:
        return error;
}
 
/*
 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
 *
 * This is really horribly ugly.
 */
 
asmlinkage int sys_ipc (uint call, int first, int second, int third, void __user *ptr, long fifth)
{
        int version, err;
 
        version = call >> 16; /* hack for backward compatibility */
        call &= 0xffff;
 
        if (call <= SEMCTL)
                switch (call) {
                case SEMOP:
                        err = sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL);
                        goto out;
                case SEMTIMEDOP:
                        err = sys_semtimedop (first, (struct sembuf __user *)ptr, second, (const struct timespec __user *) fifth);
                        goto out;
                case SEMGET:
                        err = sys_semget (first, second, third);
                        goto out;
                case SEMCTL: {
                        union semun fourth;
                        err = -EINVAL;
                        if (!ptr)
                                goto out;
                        err = -EFAULT;
                        if (get_user(fourth.__pad,
                                     (void __user * __user *)ptr))
                                goto out;
                        err = sys_semctl (first, second, third, fourth);
                        goto out;
                        }
                default:
                        err = -ENOSYS;
                        goto out;
                }
        if (call <= MSGCTL)
                switch (call) {
                case MSGSND:
                        err = sys_msgsnd (first, (struct msgbuf __user *) ptr,
                                          second, third);
                        goto out;
                case MSGRCV:
                        switch (version) {
                        case 0: {
                                struct ipc_kludge tmp;
                                err = -EINVAL;
                                if (!ptr)
                                        goto out;
                                err = -EFAULT;
                                if (copy_from_user(&tmp, (struct ipc_kludge __user *) ptr, sizeof (tmp)))
                                        goto out;
                                err = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third);
                                goto out;
                                }
                        case 1: default:
                                err = sys_msgrcv (first,
                                                  (struct msgbuf __user *) ptr,
                                                  second, fifth, third);
                                goto out;
                        }
                case MSGGET:
                        err = sys_msgget ((key_t) first, second);
                        goto out;
                case MSGCTL:
                        err = sys_msgctl (first, second, (struct msqid_ds __user *) ptr);
                        goto out;
                default:
                        err = -ENOSYS;
                        goto out;
                }
        if (call <= SHMCTL)
                switch (call) {
                case SHMAT:
                        switch (version) {
                        case 0: default: {
                                ulong raddr;
                                err = do_shmat (first, (char __user *) ptr, second, &raddr);
                                if (err)
                                        goto out;
                                err = -EFAULT;
                                if (put_user (raddr, (ulong __user *) third))
                                        goto out;
                                err = 0;
                                goto out;
                                }
                        case 1: /* iBCS2 emulator entry point */
                                err = -EINVAL;
                                goto out;
                        }
                case SHMDT:
                        err = sys_shmdt ((char __user *)ptr);
                        goto out;
                case SHMGET:
                        err = sys_shmget (first, second, third);
                        goto out;
                case SHMCTL:
                        err = sys_shmctl (first, second, (struct shmid_ds __user *) ptr);
                        goto out;
                default:
                        err = -ENOSYS;
                        goto out;
                }
        else
                err = -ENOSYS;
out:
        return err;
}
 
int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
{
        if (ARCH_SUN4C_SUN4 &&
            (len > 0x20000000 ||
             ((flags & MAP_FIXED) &&
              addr < 0xe0000000 && addr + len > 0x20000000)))
                return -EINVAL;
 
        /* See asm-sparc/uaccess.h */
        if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
                return -EINVAL;
 
        return 0;
}
 
/* Linux version of mmap */
static unsigned long do_mmap2(unsigned long addr, unsigned long len,
        unsigned long prot, unsigned long flags, unsigned long fd,
        unsigned long pgoff)
{
        struct file * file = NULL;
        unsigned long retval = -EBADF;
 
        if (!(flags & MAP_ANONYMOUS)) {
                file = fget(fd);
                if (!file)
                        goto out;
        }
 
        len = PAGE_ALIGN(len);
        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
 
        down_write(&current->mm->mmap_sem);
        retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
        up_write(&current->mm->mmap_sem);
 
        if (file)
                fput(file);
out:
        return retval;
}
 
asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
        unsigned long prot, unsigned long flags, unsigned long fd,
        unsigned long pgoff)
{
        /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
           we have. */
        return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));
}
 
asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
        unsigned long prot, unsigned long flags, unsigned long fd,
        unsigned long off)
{
        return do_mmap2(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
}
 
long sparc_remap_file_pages(unsigned long start, unsigned long size,
                           unsigned long prot, unsigned long pgoff,
                           unsigned long flags)
{
        /* This works on an existing mmap so we don't need to validate
         * the range as that was done at the original mmap call.
         */
        return sys_remap_file_pages(start, size, prot,
                                    (pgoff >> (PAGE_SHIFT - 12)), flags);
}
 
extern unsigned long do_mremap(unsigned long addr,
        unsigned long old_len, unsigned long new_len,
        unsigned long flags, unsigned long new_addr);
 
asmlinkage unsigned long sparc_mremap(unsigned long addr,
        unsigned long old_len, unsigned long new_len,
        unsigned long flags, unsigned long new_addr)
{
        struct vm_area_struct *vma;
        unsigned long ret = -EINVAL;
        if (ARCH_SUN4C_SUN4) {
                if (old_len > 0x20000000 || new_len > 0x20000000)
                        goto out;
                if (addr < 0xe0000000 && addr + old_len > 0x20000000)
                        goto out;
        }
        if (old_len > TASK_SIZE - PAGE_SIZE ||
            new_len > TASK_SIZE - PAGE_SIZE)
                goto out;
        down_write(&current->mm->mmap_sem);
        if (flags & MREMAP_FIXED) {
                if (ARCH_SUN4C_SUN4 &&
                    new_addr < 0xe0000000 &&
                    new_addr + new_len > 0x20000000)
                        goto out_sem;
                if (new_addr + new_len > TASK_SIZE - PAGE_SIZE)
                        goto out_sem;
        } else if ((ARCH_SUN4C_SUN4 && addr < 0xe0000000 &&
                    addr + new_len > 0x20000000) ||
                   addr + new_len > TASK_SIZE - PAGE_SIZE) {
                unsigned long map_flags = 0;
                struct file *file = NULL;
 
                ret = -ENOMEM;
                if (!(flags & MREMAP_MAYMOVE))
                        goto out_sem;
 
                vma = find_vma(current->mm, addr);
                if (vma) {
                        if (vma->vm_flags & VM_SHARED)
                                map_flags |= MAP_SHARED;
                        file = vma->vm_file;
                }
 
                new_addr = get_unmapped_area(file, addr, new_len,
                                     vma ? vma->vm_pgoff : 0,
                                     map_flags);
                ret = new_addr;
                if (new_addr & ~PAGE_MASK)
                        goto out_sem;
                flags |= MREMAP_FIXED;
        }
        ret = do_mremap(addr, old_len, new_len, flags, new_addr);
out_sem:
        up_write(&current->mm->mmap_sem);
out:
        return ret;
}
 
/* we come to here via sys_nis_syscall so it can setup the regs argument */
asmlinkage unsigned long
c_sys_nis_syscall (struct pt_regs *regs)
{
        static int count = 0;
 
        if (count++ > 5)
                return -ENOSYS;
        printk ("%s[%d]: Unimplemented SPARC system call %d\n",
                current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
#ifdef DEBUG_UNIMP_SYSCALL      
        show_regs (regs);
#endif
        return -ENOSYS;
}
 
/* #define DEBUG_SPARC_BREAKPOINT */
 
asmlinkage void
sparc_breakpoint (struct pt_regs *regs)
{
        siginfo_t info;
 
        lock_kernel();
#ifdef DEBUG_SPARC_BREAKPOINT
        printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
#endif
        info.si_signo = SIGTRAP;
        info.si_errno = 0;
        info.si_code = TRAP_BRKPT;
        info.si_addr = (void __user *)regs->pc;
        info.si_trapno = 0;
        force_sig_info(SIGTRAP, &info, current);
 
#ifdef DEBUG_SPARC_BREAKPOINT
        printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);
#endif
        unlock_kernel();
}
 
asmlinkage int
sparc_sigaction (int sig, const struct old_sigaction __user *act,
                 struct old_sigaction __user *oact)
{
        struct k_sigaction new_ka, old_ka;
        int ret;
 
        if (sig < 0) {
                current->thread.new_signal = 1;
                sig = -sig;
        }
 
        if (act) {
                unsigned long mask;
 
                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
                    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
                    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
                        return -EFAULT;
                __get_user(new_ka.sa.sa_flags, &act->sa_flags);
                __get_user(mask, &act->sa_mask);
                siginitset(&new_ka.sa.sa_mask, mask);
                new_ka.ka_restorer = NULL;
        }
 
        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 
        if (!ret && oact) {
                /* In the clone() case we could copy half consistent
                 * state to the user, however this could sleep and
                 * deadlock us if we held the signal lock on SMP.  So for
                 * now I take the easy way out and do no locking.
                 */
                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
                    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
                    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
                        return -EFAULT;
                __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
                __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
        }
 
        return ret;
}
 
asmlinkage long
sys_rt_sigaction(int sig,
                 const struct sigaction __user *act,
                 struct sigaction __user *oact,
                 void __user *restorer,
                 size_t sigsetsize)
{
        struct k_sigaction new_ka, old_ka;
        int ret;
 
        /* XXX: Don't preclude handling different sized sigset_t's.  */
        if (sigsetsize != sizeof(sigset_t))
                return -EINVAL;
 
        /* All tasks which use RT signals (effectively) use
         * new style signals.
         */
        current->thread.new_signal = 1;
 
        if (act) {
                new_ka.ka_restorer = restorer;
                if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
                        return -EFAULT;
        }
 
        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 
        if (!ret && oact) {
                if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
                        return -EFAULT;
        }
 
        return ret;
}
 
asmlinkage int sys_getdomainname(char __user *name, int len)
{
        int nlen, err;
 
        if (len < 0)
                return -EINVAL;
 
        down_read(&uts_sem);
 
        nlen = strlen(utsname()->domainname) + 1;
        err = -EINVAL;
        if (nlen > len)
                goto out;
 
        err = -EFAULT;
        if (!copy_to_user(name, utsname()->domainname, nlen))
                err = 0;
 
out:
        up_read(&uts_sem);
        return err;
}
 
/*
 * Do a system call from kernel instead of calling sys_execve so we
 * end up with proper pt_regs.
 */
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
{
        long __res;
        register long __g1 __asm__ ("g1") = __NR_execve;
        register long __o0 __asm__ ("o0") = (long)(filename);
        register long __o1 __asm__ ("o1") = (long)(argv);
        register long __o2 __asm__ ("o2") = (long)(envp);
        asm volatile ("t 0x10\n\t"
                      "bcc 1f\n\t"
                      "mov %%o0, %0\n\t"
                      "sub %%g0, %%o0, %0\n\t"
                      "1:\n\t"
                      : "=r" (__res), "=&r" (__o0)
                      : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)
                      : "cc");
        return __res;
}

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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc/] [kernel/] [sys_sparc.c] - Blame information for rev 3

Line No.	Rev	Author	Line
1	3	xianfeng	`/* $Id: sys_sparc.c,v 1.70 2001/04/14 01:12:02 davem Exp $`
2			`* linux/arch/sparc/kernel/sys_sparc.c`
3			`*`
4			`* This file contains various random system calls that`
5			`* have a non-standard calling sequence on the Linux/sparc`
6			`* platform.`
7			`*/`
8
9			`#include <linux/errno.h>`
10			`#include <linux/types.h>`
11			`#include <linux/sched.h>`
12			`#include <linux/mm.h>`
13			`#include <linux/fs.h>`
14			`#include <linux/file.h>`
15			`#include <linux/sem.h>`
16			`#include <linux/msg.h>`
17			`#include <linux/shm.h>`
18			`#include <linux/stat.h>`
19			`#include <linux/syscalls.h>`
20			`#include <linux/mman.h>`
21			`#include <linux/utsname.h>`
22			`#include <linux/smp.h>`
23			`#include <linux/smp_lock.h>`
24			`#include <linux/ipc.h>`
25
26			`#include <asm/uaccess.h>`
27			`#include <asm/unistd.h>`
28
29			`/* #define DEBUG_UNIMP_SYSCALL */`
30
31			`/* XXX Make this per-binary type, this way we can detect the type of`
32			`* XXX a binary. Every Sparc executable calls this very early on.`
33			`*/`
34			`asmlinkage unsigned long sys_getpagesize(void)`
35			`{`
36			`return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */`
37			`}`
38
39			`#define COLOUR_ALIGN(addr) (((addr)+SHMLBA-1)&~(SHMLBA-1))`
40
41			`unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)`
42			`{`
43			`struct vm_area_struct * vmm;`
44
45			`if (flags & MAP_FIXED) {`
46			`/* We do not accept a shared mapping if it would violate`
47			`* cache aliasing constraints.`
48			`*/`
49			`if ((flags & MAP_SHARED) && (addr & (SHMLBA - 1)))`
50			`return -EINVAL;`
51			`return addr;`
52			`}`
53
54			`/* See asm-sparc/uaccess.h */`
55			`if (len > TASK_SIZE - PAGE_SIZE)`
56			`return -ENOMEM;`
57			`if (ARCH_SUN4C_SUN4 && len > 0x20000000)`
58			`return -ENOMEM;`
59			`if (!addr)`
60			`addr = TASK_UNMAPPED_BASE;`
61
62			`if (flags & MAP_SHARED)`
63			`addr = COLOUR_ALIGN(addr);`
64			`else`
65			`addr = PAGE_ALIGN(addr);`
66
67			`for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {`
68			`/* At this point: (!vmm \|\| addr < vmm->vm_end). */`
69			`if (ARCH_SUN4C_SUN4 && addr < 0xe0000000 && 0x20000000 - len < addr) {`
70			`addr = PAGE_OFFSET;`
71			`vmm = find_vma(current->mm, PAGE_OFFSET);`
72			`}`
73			`if (TASK_SIZE - PAGE_SIZE - len < addr)`
74			`return -ENOMEM;`
75			`if (!vmm \|\| addr + len <= vmm->vm_start)`
76			`return addr;`
77			`addr = vmm->vm_end;`
78			`if (flags & MAP_SHARED)`
79			`addr = COLOUR_ALIGN(addr);`
80			`}`
81			`}`
82
83			`asmlinkage unsigned long sparc_brk(unsigned long brk)`
84			`{`
85			`if(ARCH_SUN4C_SUN4) {`
86			`if ((brk & 0xe0000000) != (current->mm->brk & 0xe0000000))`
87			`return current->mm->brk;`
88			`}`
89			`return sys_brk(brk);`
90			`}`
91
92			`/*`
93			`* sys_pipe() is the normal C calling standard for creating`
94			`* a pipe. It's not the way unix traditionally does this, though.`
95			`*/`
96			`asmlinkage int sparc_pipe(struct pt_regs *regs)`
97			`{`
98			`int fd[2];`
99			`int error;`
100
101			`error = do_pipe(fd);`
102			`if (error)`
103			`goto out;`
104			`regs->u_regs[UREG_I1] = fd[1];`
105			`error = fd[0];`
106			`out:`
107			`return error;`
108			`}`
109
110			`/*`
111			`* sys_ipc() is the de-multiplexer for the SysV IPC calls..`
112			`*`
113			`* This is really horribly ugly.`
114			`*/`
115
116			`asmlinkage int sys_ipc (uint call, int first, int second, int third, void __user *ptr, long fifth)`
117			`{`
118			`int version, err;`
119
120			`version = call >> 16; /* hack for backward compatibility */`
121			`call &= 0xffff;`
122
123			`if (call <= SEMCTL)`
124			`switch (call) {`
125			`case SEMOP:`
126			`err = sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL);`
127			`goto out;`
128			`case SEMTIMEDOP:`
129			`err = sys_semtimedop (first, (struct sembuf __user )ptr, second, (const struct timespec __user ) fifth);`
130			`goto out;`
131			`case SEMGET:`
132			`err = sys_semget (first, second, third);`
133			`goto out;`
134			`case SEMCTL: {`
135			`union semun fourth;`
136			`err = -EINVAL;`
137			`if (!ptr)`
138			`goto out;`
139			`err = -EFAULT;`
140			`if (get_user(fourth.__pad,`
141			`(void __user * __user *)ptr))`
142			`goto out;`
143			`err = sys_semctl (first, second, third, fourth);`
144			`goto out;`
145			`}`
146			`default:`
147			`err = -ENOSYS;`
148			`goto out;`
149			`}`
150			`if (call <= MSGCTL)`
151			`switch (call) {`
152			`case MSGSND:`
153			`err = sys_msgsnd (first, (struct msgbuf __user *) ptr,`
154			`second, third);`
155			`goto out;`
156			`case MSGRCV:`
157			`switch (version) {`
158			`case 0: {`
159			`struct ipc_kludge tmp;`
160			`err = -EINVAL;`
161			`if (!ptr)`
162			`goto out;`
163			`err = -EFAULT;`
164			`if (copy_from_user(&tmp, (struct ipc_kludge __user *) ptr, sizeof (tmp)))`
165			`goto out;`
166			`err = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third);`
167			`goto out;`
168			`}`
169			`case 1: default:`
170			`err = sys_msgrcv (first,`
171			`(struct msgbuf __user *) ptr,`
172			`second, fifth, third);`
173			`goto out;`
174			`}`
175			`case MSGGET:`
176			`err = sys_msgget ((key_t) first, second);`
177			`goto out;`
178			`case MSGCTL:`
179			`err = sys_msgctl (first, second, (struct msqid_ds __user *) ptr);`
180			`goto out;`
181			`default:`
182			`err = -ENOSYS;`
183			`goto out;`
184			`}`
185			`if (call <= SHMCTL)`
186			`switch (call) {`
187			`case SHMAT:`
188			`switch (version) {`
189			`case 0: default: {`
190			`ulong raddr;`
191			`err = do_shmat (first, (char __user *) ptr, second, &raddr);`
192			`if (err)`
193			`goto out;`
194			`err = -EFAULT;`
195			`if (put_user (raddr, (ulong __user *) third))`
196			`goto out;`
197			`err = 0;`
198			`goto out;`
199			`}`
200			`case 1: /* iBCS2 emulator entry point */`
201			`err = -EINVAL;`
202			`goto out;`
203			`}`
204			`case SHMDT:`
205			`err = sys_shmdt ((char __user *)ptr);`
206			`goto out;`
207			`case SHMGET:`
208			`err = sys_shmget (first, second, third);`
209			`goto out;`
210			`case SHMCTL:`
211			`err = sys_shmctl (first, second, (struct shmid_ds __user *) ptr);`
212			`goto out;`
213			`default:`
214			`err = -ENOSYS;`
215			`goto out;`
216			`}`
217			`else`
218			`err = -ENOSYS;`
219			`out:`
220			`return err;`
221			`}`
222
223			`int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)`
224			`{`
225			`if (ARCH_SUN4C_SUN4 &&`
226			`(len > 0x20000000 \|\|`
227			`((flags & MAP_FIXED) &&`
228			`addr < 0xe0000000 && addr + len > 0x20000000)))`
229			`return -EINVAL;`
230
231			`/* See asm-sparc/uaccess.h */`
232			`if (len > TASK_SIZE - PAGE_SIZE \|\| addr + len > TASK_SIZE - PAGE_SIZE)`
233			`return -EINVAL;`
234
235			`return 0;`
236			`}`
237
238			`/* Linux version of mmap */`
239			`static unsigned long do_mmap2(unsigned long addr, unsigned long len,`
240			`unsigned long prot, unsigned long flags, unsigned long fd,`
241			`unsigned long pgoff)`
242			`{`
243			`struct file * file = NULL;`
244			`unsigned long retval = -EBADF;`
245
246			`if (!(flags & MAP_ANONYMOUS)) {`
247			`file = fget(fd);`
248			`if (!file)`
249			`goto out;`
250			`}`
251
252			`len = PAGE_ALIGN(len);`
253			`flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);`
254
255			`down_write(&current->mm->mmap_sem);`
256			`retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);`
257			`up_write(&current->mm->mmap_sem);`
258
259			`if (file)`
260			`fput(file);`
261			`out:`
262			`return retval;`
263			`}`
264
265			`asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,`
266			`unsigned long prot, unsigned long flags, unsigned long fd,`
267			`unsigned long pgoff)`
268			`{`
269			`/* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE`
270			`we have. */`
271			`return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));`
272			`}`
273
274			`asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,`
275			`unsigned long prot, unsigned long flags, unsigned long fd,`
276			`unsigned long off)`
277			`{`
278			`return do_mmap2(addr, len, prot, flags, fd, off >> PAGE_SHIFT);`
279			`}`
280
281			`long sparc_remap_file_pages(unsigned long start, unsigned long size,`
282			`unsigned long prot, unsigned long pgoff,`
283			`unsigned long flags)`
284			`{`
285			`/* This works on an existing mmap so we don't need to validate`
286			`* the range as that was done at the original mmap call.`
287			`*/`
288			`return sys_remap_file_pages(start, size, prot,`
289			`(pgoff >> (PAGE_SHIFT - 12)), flags);`
290			`}`
291
292			`extern unsigned long do_mremap(unsigned long addr,`
293			`unsigned long old_len, unsigned long new_len,`
294			`unsigned long flags, unsigned long new_addr);`
295
296			`asmlinkage unsigned long sparc_mremap(unsigned long addr,`
297			`unsigned long old_len, unsigned long new_len,`
298			`unsigned long flags, unsigned long new_addr)`
299			`{`
300			`struct vm_area_struct *vma;`
301			`unsigned long ret = -EINVAL;`
302			`if (ARCH_SUN4C_SUN4) {`
303			`if (old_len > 0x20000000 \|\| new_len > 0x20000000)`
304			`goto out;`
305			`if (addr < 0xe0000000 && addr + old_len > 0x20000000)`
306			`goto out;`
307			`}`
308			`if (old_len > TASK_SIZE - PAGE_SIZE \|\|`
309			`new_len > TASK_SIZE - PAGE_SIZE)`
310			`goto out;`
311			`down_write(&current->mm->mmap_sem);`
312			`if (flags & MREMAP_FIXED) {`
313			`if (ARCH_SUN4C_SUN4 &&`
314			`new_addr < 0xe0000000 &&`
315			`new_addr + new_len > 0x20000000)`
316			`goto out_sem;`
317			`if (new_addr + new_len > TASK_SIZE - PAGE_SIZE)`
318			`goto out_sem;`
319			`} else if ((ARCH_SUN4C_SUN4 && addr < 0xe0000000 &&`
320			`addr + new_len > 0x20000000) \|\|`
321			`addr + new_len > TASK_SIZE - PAGE_SIZE) {`
322			`unsigned long map_flags = 0;`
323			`struct file *file = NULL;`
324
325			`ret = -ENOMEM;`
326			`if (!(flags & MREMAP_MAYMOVE))`
327			`goto out_sem;`
328
329			`vma = find_vma(current->mm, addr);`
330			`if (vma) {`
331			`if (vma->vm_flags & VM_SHARED)`
332			`map_flags \|= MAP_SHARED;`
333			`file = vma->vm_file;`
334			`}`
335
336			`new_addr = get_unmapped_area(file, addr, new_len,`
337			`vma ? vma->vm_pgoff : 0,`
338			`map_flags);`
339			`ret = new_addr;`
340			`if (new_addr & ~PAGE_MASK)`
341			`goto out_sem;`
342			`flags \|= MREMAP_FIXED;`
343			`}`
344			`ret = do_mremap(addr, old_len, new_len, flags, new_addr);`
345			`out_sem:`
346			`up_write(&current->mm->mmap_sem);`
347			`out:`
348			`return ret;`
349			`}`
350
351			`/* we come to here via sys_nis_syscall so it can setup the regs argument */`
352			`asmlinkage unsigned long`
353			`c_sys_nis_syscall (struct pt_regs *regs)`
354			`{`
355			`static int count = 0;`
356
357			`if (count++ > 5)`
358			`return -ENOSYS;`
359			`printk ("%s[%d]: Unimplemented SPARC system call %d\n",`
360			`current->comm, task_pid_nr(current), (int)regs->u_regs[1]);`
361			`#ifdef DEBUG_UNIMP_SYSCALL`
362			`show_regs (regs);`
363			`#endif`
364			`return -ENOSYS;`
365			`}`
366
367			`/* #define DEBUG_SPARC_BREAKPOINT */`
368
369			`asmlinkage void`
370			`sparc_breakpoint (struct pt_regs *regs)`
371			`{`
372			`siginfo_t info;`
373
374			`lock_kernel();`
375			`#ifdef DEBUG_SPARC_BREAKPOINT`
376			`printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);`
377			`#endif`
378			`info.si_signo = SIGTRAP;`
379			`info.si_errno = 0;`
380			`info.si_code = TRAP_BRKPT;`
381			`info.si_addr = (void __user *)regs->pc;`
382			`info.si_trapno = 0;`
383			`force_sig_info(SIGTRAP, &info, current);`
384
385			`#ifdef DEBUG_SPARC_BREAKPOINT`
386			`printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);`
387			`#endif`
388			`unlock_kernel();`
389			`}`
390
391			`asmlinkage int`
392			`sparc_sigaction (int sig, const struct old_sigaction __user *act,`
393			`struct old_sigaction __user *oact)`
394			`{`
395			`struct k_sigaction new_ka, old_ka;`
396			`int ret;`
397
398			`if (sig < 0) {`
399			`current->thread.new_signal = 1;`
400			`sig = -sig;`
401			`}`
402
403			`if (act) {`
404			`unsigned long mask;`
405
406			`if (!access_ok(VERIFY_READ, act, sizeof(*act)) \|\|`
407			`__get_user(new_ka.sa.sa_handler, &act->sa_handler) \|\|`
408			`__get_user(new_ka.sa.sa_restorer, &act->sa_restorer))`
409			`return -EFAULT;`
410			`__get_user(new_ka.sa.sa_flags, &act->sa_flags);`
411			`__get_user(mask, &act->sa_mask);`
412			`siginitset(&new_ka.sa.sa_mask, mask);`
413			`new_ka.ka_restorer = NULL;`
414			`}`
415
416			`ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);`
417
418			`if (!ret && oact) {`
419			`/* In the clone() case we could copy half consistent`
420			`* state to the user, however this could sleep and`
421			`* deadlock us if we held the signal lock on SMP. So for`
422			`* now I take the easy way out and do no locking.`
423			`*/`
424			`if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) \|\|`
425			`__put_user(old_ka.sa.sa_handler, &oact->sa_handler) \|\|`
426			`__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))`
427			`return -EFAULT;`
428			`__put_user(old_ka.sa.sa_flags, &oact->sa_flags);`
429			`__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);`
430			`}`
431
432			`return ret;`
433			`}`
434
435			`asmlinkage long`
436			`sys_rt_sigaction(int sig,`
437			`const struct sigaction __user *act,`
438			`struct sigaction __user *oact,`
439			`void __user *restorer,`
440			`size_t sigsetsize)`
441			`{`
442			`struct k_sigaction new_ka, old_ka;`
443			`int ret;`
444
445			`/* XXX: Don't preclude handling different sized sigset_t's. */`
446			`if (sigsetsize != sizeof(sigset_t))`
447			`return -EINVAL;`
448
449			`/* All tasks which use RT signals (effectively) use`
450			`* new style signals.`
451			`*/`
452			`current->thread.new_signal = 1;`
453
454			`if (act) {`
455			`new_ka.ka_restorer = restorer;`
456			`if (copy_from_user(&new_ka.sa, act, sizeof(*act)))`
457			`return -EFAULT;`
458			`}`
459
460			`ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);`
461
462			`if (!ret && oact) {`
463			`if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))`
464			`return -EFAULT;`
465			`}`
466
467			`return ret;`
468			`}`
469
470			`asmlinkage int sys_getdomainname(char __user *name, int len)`
471			`{`
472			`int nlen, err;`
473
474			`if (len < 0)`
475			`return -EINVAL;`
476
477			`down_read(&uts_sem);`
478
479			`nlen = strlen(utsname()->domainname) + 1;`
480			`err = -EINVAL;`
481			`if (nlen > len)`
482			`goto out;`
483
484			`err = -EFAULT;`
485			`if (!copy_to_user(name, utsname()->domainname, nlen))`
486			`err = 0;`
487
488			`out:`
489			`up_read(&uts_sem);`
490			`return err;`
491			`}`
492
493			`/*`
494			`* Do a system call from kernel instead of calling sys_execve so we`
495			`* end up with proper pt_regs.`
496			`*/`
497			`int kernel_execve(const char filename, char const argv[], char *const envp[])`
498			`{`
499			`long __res;`
500			`register long __g1 __asm__ ("g1") = __NR_execve;`
501			`register long __o0 __asm__ ("o0") = (long)(filename);`
502			`register long __o1 __asm__ ("o1") = (long)(argv);`
503			`register long __o2 __asm__ ("o2") = (long)(envp);`
504			`asm volatile ("t 0x10\n\t"`
505			`"bcc 1f\n\t"`
506			`"mov %%o0, %0\n\t"`
507			`"sub %%g0, %%o0, %0\n\t"`
508			`"1:\n\t"`
509			`: "=r" (__res), "=&r" (__o0)`
510			`: "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)`
511			`: "cc");`
512			`return __res;`
513			`}`