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author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
commit | 2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch) | |
tree | 726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /arch/sparc/kernel/sys_sparc_32.c | |
parent | e12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff) | |
parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
download | linux-fsl-qoriq-2ca1a615835d9f4990f42102ab1f2ef434e7e89c.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/x86/kernel/io_apic.c
Diffstat (limited to 'arch/sparc/kernel/sys_sparc_32.c')
-rw-r--r-- | arch/sparc/kernel/sys_sparc_32.c | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c new file mode 100644 index 0000000..03035c8 --- /dev/null +++ b/arch/sparc/kernel/sys_sparc_32.c @@ -0,0 +1,466 @@ +/* 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 && 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 && 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) { + 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_flags(fd, 0); + 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) +{ + if (ARCH_SUN4C && + (len > 0x20000000 || + (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(¤t->mm->mmap_sem); + retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); + up_write(¤t->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) +{ + unsigned long ret = -EINVAL; + + if (unlikely(sparc_mmap_check(addr, old_len))) + goto out; + if (unlikely(sparc_mmap_check(new_addr, new_len))) + goto out; + down_write(¤t->mm->mmap_sem); + ret = do_mremap(addr, old_len, new_len, flags, new_addr); + up_write(¤t->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; + + WARN_ON_ONCE(sig >= 0); + 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; + + 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; +} |