Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 723 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
new file mode 100644
index 0000000..0077f02
--- /dev/null
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -0,0 +1,723 @@
+/* $Id: sys_sparc.c,v 1.57 2002/02/09 19:49:30 davem Exp $
+ * linux/arch/sparc64/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/config.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mm.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/mman.h>
+#include <linux/utsname.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/ipc.h>
+#include <linux/personality.h>
+
+#include <asm/uaccess.h>
+#include <asm/ipc.h>
+#include <asm/utrap.h>
+#include <asm/perfctr.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;
+}
+
+#define COLOUR_ALIGN(addr,pgoff)		\
+	((((addr)+SHMLBA-1)&~(SHMLBA-1)) +	\
+	 (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
+
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct * vma;
+	unsigned long task_size = TASK_SIZE;
+	unsigned long start_addr;
+	int do_color_align;
+
+	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 (test_thread_flag(TIF_32BIT))
+		task_size = 0xf0000000UL;
+	if (len > task_size || len > -PAGE_OFFSET)
+		return -ENOMEM;
+
+	do_color_align = 0;
+	if (filp || (flags & MAP_SHARED))
+		do_color_align = 1;
+
+	if (addr) {
+		if (do_color_align)
+			addr = COLOUR_ALIGN(addr, pgoff);
+		else
+			addr = PAGE_ALIGN(addr);
+
+		vma = find_vma(mm, addr);
+		if (task_size - len >= addr &&
+		    (!vma || addr + len <= vma->vm_start))
+			return addr;
+	}
+
+	start_addr = addr = mm->free_area_cache;
+
+	task_size -= len;
+
+full_search:
+	if (do_color_align)
+		addr = COLOUR_ALIGN(addr, pgoff);
+	else
+		addr = PAGE_ALIGN(addr);
+
+	for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+		/* At this point:  (!vma || addr < vma->vm_end). */
+		if (addr < PAGE_OFFSET && -PAGE_OFFSET - len < addr) {
+			addr = PAGE_OFFSET;
+			vma = find_vma(mm, PAGE_OFFSET);
+		}
+		if (task_size < addr) {
+			if (start_addr != TASK_UNMAPPED_BASE) {
+				start_addr = addr = TASK_UNMAPPED_BASE;
+				goto full_search;
+			}
+			return -ENOMEM;
+		}
+		if (!vma || addr + len <= vma->vm_start) {
+			/*
+			 * Remember the place where we stopped the search:
+			 */
+			mm->free_area_cache = addr + len;
+			return addr;
+		}
+		addr = vma->vm_end;
+		if (do_color_align)
+			addr = COLOUR_ALIGN(addr, pgoff);
+	}
+}
+
+/* Try to align mapping such that we align it as much as possible. */
+unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+	unsigned long align_goal, addr = -ENOMEM;
+
+	if (flags & MAP_FIXED) {
+		/* Ok, don't mess with it. */
+		return get_unmapped_area(NULL, addr, len, pgoff, flags);
+	}
+	flags &= ~MAP_SHARED;
+
+	align_goal = PAGE_SIZE;
+	if (len >= (4UL * 1024 * 1024))
+		align_goal = (4UL * 1024 * 1024);
+	else if (len >= (512UL * 1024))
+		align_goal = (512UL * 1024);
+	else if (len >= (64UL * 1024))
+		align_goal = (64UL * 1024);
+
+	do {
+		addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
+		if (!(addr & ~PAGE_MASK)) {
+			addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
+			break;
+		}
+
+		if (align_goal == (4UL * 1024 * 1024))
+			align_goal = (512UL * 1024);
+		else if (align_goal == (512UL * 1024))
+			align_goal = (64UL * 1024);
+		else
+			align_goal = PAGE_SIZE;
+	} while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
+
+	/* Mapping is smaller than 64K or larger areas could not
+	 * be obtained.
+	 */
+	if (addr & ~PAGE_MASK)
+		addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags);
+
+	return addr;
+}
+
+asmlinkage unsigned long sparc_brk(unsigned long brk)
+{
+	/* People could try to be nasty and use ta 0x6d in 32bit programs */
+	if (test_thread_flag(TIF_32BIT) &&
+	    brk >= 0xf0000000UL)
+		return current->mm->brk;
+
+	if ((current->mm->brk & PAGE_OFFSET) != (brk & PAGE_OFFSET))
+		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 long 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 long sys_ipc(unsigned int call, int first, unsigned long second,
+			unsigned long third, void __user *ptr, long fifth)
+{
+	int err;
+
+	/* No need for backward compatibility. We can start fresh... */
+	if (call <= SEMCTL) {
+		switch (call) {
+		case SEMOP:
+			err = sys_semtimedop(first, ptr,
+					     (unsigned)second, NULL);
+			goto out;
+		case SEMTIMEDOP:
+			err = sys_semtimedop(first, ptr, (unsigned)second,
+				(const struct timespec __user *) fifth);
+			goto out;
+		case SEMGET:
+			err = sys_semget(first, (int)second, (int)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, (int)second | IPC_64,
+					 (int)third, fourth);
+			goto out;
+		}
+		default:
+			err = -ENOSYS;
+			goto out;
+		};
+	}
+	if (call <= MSGCTL) {
+		switch (call) {
+		case MSGSND:
+			err = sys_msgsnd(first, ptr, (size_t)second,
+					 (int)third);
+			goto out;
+		case MSGRCV:
+			err = sys_msgrcv(first, ptr, (size_t)second, fifth,
+					 (int)third);
+			goto out;
+		case MSGGET:
+			err = sys_msgget((key_t)first, (int)second);
+			goto out;
+		case MSGCTL:
+			err = sys_msgctl(first, (int)second | IPC_64, ptr);
+			goto out;
+		default:
+			err = -ENOSYS;
+			goto out;
+		};
+	}
+	if (call <= SHMCTL) {
+		switch (call) {
+		case SHMAT: {
+			ulong raddr;
+			err = do_shmat(first, ptr, (int)second, &raddr);
+			if (!err) {
+				if (put_user(raddr,
+					     (ulong __user *) third))
+					err = -EFAULT;
+			}
+			goto out;
+		}
+		case SHMDT:
+			err = sys_shmdt(ptr);
+			goto out;
+		case SHMGET:
+			err = sys_shmget(first, (size_t)second, (int)third);
+			goto out;
+		case SHMCTL:
+			err = sys_shmctl(first, (int)second | IPC_64, ptr);
+			goto out;
+		default:
+			err = -ENOSYS;
+			goto out;
+		};
+	} else {
+		err = -ENOSYS;
+	}
+out:
+	return err;
+}
+
+asmlinkage long sparc64_newuname(struct new_utsname __user *name)
+{
+	int ret = sys_newuname(name);
+	
+	if (current->personality == PER_LINUX32 && !ret) {
+		ret = (copy_to_user(name->machine, "sparc\0\0", 8)
+		       ? -EFAULT : 0);
+	}
+	return ret;
+}
+
+asmlinkage long sparc64_personality(unsigned long personality)
+{
+	int ret;
+
+	if (current->personality == PER_LINUX32 &&
+	    personality == PER_LINUX)
+		personality = PER_LINUX32;
+	ret = sys_personality(personality);
+	if (ret == PER_LINUX32)
+		ret = PER_LINUX;
+
+	return ret;
+}
+
+/* Linux version of mmap */
+asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags, unsigned long fd,
+	unsigned long off)
+{
+	struct file * file = NULL;
+	unsigned long retval = -EBADF;
+
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			goto out;
+	}
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	len = PAGE_ALIGN(len);
+	retval = -EINVAL;
+
+	if (test_thread_flag(TIF_32BIT)) {
+		if (len > 0xf0000000UL ||
+		    ((flags & MAP_FIXED) && addr > 0xf0000000UL - len))
+			goto out_putf;
+	} else {
+		if (len > -PAGE_OFFSET ||
+		    ((flags & MAP_FIXED) &&
+		     addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
+			goto out_putf;
+	}
+
+	down_write(&current->mm->mmap_sem);
+	retval = do_mmap(file, addr, len, prot, flags, off);
+	up_write(&current->mm->mmap_sem);
+
+out_putf:
+	if (file)
+		fput(file);
+out:
+	return retval;
+}
+
+asmlinkage long sys64_munmap(unsigned long addr, size_t len)
+{
+	long ret;
+
+	if (len > -PAGE_OFFSET ||
+	    (addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
+		return -EINVAL;
+	down_write(&current->mm->mmap_sem);
+	ret = do_munmap(current->mm, addr, len);
+	up_write(&current->mm->mmap_sem);
+	return ret;
+}
+
+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 sys64_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 (test_thread_flag(TIF_32BIT))
+		goto out;
+	if (old_len > -PAGE_OFFSET || new_len > -PAGE_OFFSET)
+		goto out;
+	if (addr < PAGE_OFFSET && addr + old_len > -PAGE_OFFSET)
+		goto out;
+	down_write(&current->mm->mmap_sem);
+	if (flags & MREMAP_FIXED) {
+		if (new_addr < PAGE_OFFSET &&
+		    new_addr + new_len > -PAGE_OFFSET)
+			goto out_sem;
+	} else if (addr < PAGE_OFFSET && addr + new_len > -PAGE_OFFSET) {
+		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;
+		}
+
+		/* MREMAP_FIXED checked above. */
+		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;
+	
+	/* Don't make the system unusable, if someone goes stuck */
+	if (count++ > 5)
+		return -ENOSYS;
+
+	printk ("Unimplemented SPARC system call %ld\n",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;
+
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+#ifdef DEBUG_SPARC_BREAKPOINT
+        printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
+#endif
+	info.si_signo = SIGTRAP;
+	info.si_errno = 0;
+	info.si_code = TRAP_BRKPT;
+	info.si_addr = (void __user *)regs->tpc;
+	info.si_trapno = 0;
+	force_sig_info(SIGTRAP, &info, current);
+#ifdef DEBUG_SPARC_BREAKPOINT
+	printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
+#endif
+}
+
+extern void check_pending(int signum);
+
+asmlinkage long sys_getdomainname(char __user *name, int len)
+{
+        int nlen;
+	int err = -EFAULT;
+
+ 	down_read(&uts_sem);
+ 	
+	nlen = strlen(system_utsname.domainname) + 1;
+
+        if (nlen < len)
+                len = nlen;
+	if (len > __NEW_UTS_LEN)
+		goto done;
+	if (copy_to_user(name, system_utsname.domainname, len))
+		goto done;
+	err = 0;
+done:
+	up_read(&uts_sem);
+	return err;
+}
+
+asmlinkage long solaris_syscall(struct pt_regs *regs)
+{
+	static int count;
+
+	regs->tpc = regs->tnpc;
+	regs->tnpc += 4;
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	if (++count <= 5) {
+		printk ("For Solaris binary emulation you need solaris module loaded\n");
+		show_regs (regs);
+	}
+	send_sig(SIGSEGV, current, 1);
+
+	return -ENOSYS;
+}
+
+#ifndef CONFIG_SUNOS_EMUL
+asmlinkage long sunos_syscall(struct pt_regs *regs)
+{
+	static int count;
+
+	regs->tpc = regs->tnpc;
+	regs->tnpc += 4;
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	if (++count <= 20)
+		printk ("SunOS binary emulation not compiled in\n");
+	force_sig(SIGSEGV, current);
+
+	return -ENOSYS;
+}
+#endif
+
+asmlinkage long sys_utrap_install(utrap_entry_t type,
+				  utrap_handler_t new_p,
+				  utrap_handler_t new_d,
+				  utrap_handler_t __user *old_p,
+				  utrap_handler_t __user *old_d)
+{
+	if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
+		return -EINVAL;
+	if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) {
+		if (old_p) {
+			if (!current_thread_info()->utraps) {
+				if (put_user(NULL, old_p))
+					return -EFAULT;
+			} else {
+				if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
+					return -EFAULT;
+			}
+		}
+		if (old_d) {
+			if (put_user(NULL, old_d))
+				return -EFAULT;
+		}
+		return 0;
+	}
+	if (!current_thread_info()->utraps) {
+		current_thread_info()->utraps =
+			kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
+		if (!current_thread_info()->utraps)
+			return -ENOMEM;
+		current_thread_info()->utraps[0] = 1;
+		memset(current_thread_info()->utraps+1, 0,
+		       UT_TRAP_INSTRUCTION_31*sizeof(long));
+	} else {
+		if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p &&
+		    current_thread_info()->utraps[0] > 1) {
+			long *p = current_thread_info()->utraps;
+
+			current_thread_info()->utraps =
+				kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long),
+					GFP_KERNEL);
+			if (!current_thread_info()->utraps) {
+				current_thread_info()->utraps = p;
+				return -ENOMEM;
+			}
+			p[0]--;
+			current_thread_info()->utraps[0] = 1;
+			memcpy(current_thread_info()->utraps+1, p+1,
+			       UT_TRAP_INSTRUCTION_31*sizeof(long));
+		}
+	}
+	if (old_p) {
+		if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
+			return -EFAULT;
+	}
+	if (old_d) {
+		if (put_user(NULL, old_d))
+			return -EFAULT;
+	}
+	current_thread_info()->utraps[type] = (long)new_p;
+
+	return 0;
+}
+
+long sparc_memory_ordering(unsigned long model, struct pt_regs *regs)
+{
+	if (model >= 3)
+		return -EINVAL;
+	regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14);
+	return 0;
+}
+
+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;
+}
+
+/* Invoked by rtrap code to update performance counters in
+ * user space.
+ */
+asmlinkage void update_perfctrs(void)
+{
+	unsigned long pic, tmp;
+
+	read_pic(pic);
+	tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
+	__put_user(tmp, current_thread_info()->user_cntd0);
+	tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
+	__put_user(tmp, current_thread_info()->user_cntd1);
+	reset_pic();
+}
+
+asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2)
+{
+	int err = 0;
+
+	switch(opcode) {
+	case PERFCTR_ON:
+		current_thread_info()->pcr_reg = arg2;
+		current_thread_info()->user_cntd0 = (u64 __user *) arg0;
+		current_thread_info()->user_cntd1 = (u64 __user *) arg1;
+		current_thread_info()->kernel_cntd0 =
+			current_thread_info()->kernel_cntd1 = 0;
+		write_pcr(arg2);
+		reset_pic();
+		set_thread_flag(TIF_PERFCTR);
+		break;
+
+	case PERFCTR_OFF:
+		err = -EINVAL;
+		if (test_thread_flag(TIF_PERFCTR)) {
+			current_thread_info()->user_cntd0 =
+				current_thread_info()->user_cntd1 = NULL;
+			current_thread_info()->pcr_reg = 0;
+			write_pcr(0);
+			clear_thread_flag(TIF_PERFCTR);
+			err = 0;
+		}
+		break;
+
+	case PERFCTR_READ: {
+		unsigned long pic, tmp;
+
+		if (!test_thread_flag(TIF_PERFCTR)) {
+			err = -EINVAL;
+			break;
+		}
+		read_pic(pic);
+		tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
+		err |= __put_user(tmp, current_thread_info()->user_cntd0);
+		tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
+		err |= __put_user(tmp, current_thread_info()->user_cntd1);
+		reset_pic();
+		break;
+	}
+
+	case PERFCTR_CLRPIC:
+		if (!test_thread_flag(TIF_PERFCTR)) {
+			err = -EINVAL;
+			break;
+		}
+		current_thread_info()->kernel_cntd0 =
+			current_thread_info()->kernel_cntd1 = 0;
+		reset_pic();
+		break;
+
+	case PERFCTR_SETPCR: {
+		u64 __user *user_pcr = (u64 __user *)arg0;
+
+		if (!test_thread_flag(TIF_PERFCTR)) {
+			err = -EINVAL;
+			break;
+		}
+		err |= __get_user(current_thread_info()->pcr_reg, user_pcr);
+		write_pcr(current_thread_info()->pcr_reg);
+		current_thread_info()->kernel_cntd0 =
+			current_thread_info()->kernel_cntd1 = 0;
+		reset_pic();
+		break;
+	}
+
+	case PERFCTR_GETPCR: {
+		u64 __user *user_pcr = (u64 __user *)arg0;
+
+		if (!test_thread_flag(TIF_PERFCTR)) {
+			err = -EINVAL;
+			break;
+		}
+		err |= __put_user(current_thread_info()->pcr_reg, user_pcr);
+		break;
+	}
+
+	default:
+		err = -EINVAL;
+		break;
+	};
+	return err;
+}