net: wireless: sd8797: change wlan interface to wlan0
[linux-2.6.git] / fs / binfmt_aout.c
index 813a887..d146e18 100644 (file)
 #include <linux/fcntl.h>
 #include <linux/ptrace.h>
 #include <linux/user.h>
-#include <linux/slab.h>
 #include <linux/binfmts.h>
 #include <linux/personality.h>
 #include <linux/init.h>
+#include <linux/coredump.h>
+#include <linux/slab.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
+#include <asm/a.out-core.h>
 
 static int load_aout_binary(struct linux_binprm *, struct pt_regs * regs);
 static int load_aout_library(struct file*);
-static int aout_core_dump(long signr, struct pt_regs * regs, struct file *file);
+static int aout_core_dump(struct coredump_params *cprm);
 
 static struct linux_binfmt aout_format = {
        .module         = THIS_MODULE,
@@ -49,9 +50,7 @@ static int set_brk(unsigned long start, unsigned long end)
        end = PAGE_ALIGN(end);
        if (end > start) {
                unsigned long addr;
-               down_write(&current->mm->mmap_sem);
-               addr = do_brk(start, end - start);
-               up_write(&current->mm->mmap_sem);
+               addr = vm_brk(start, end - start);
                if (BAD_ADDR(addr))
                        return addr;
        }
@@ -59,26 +58,6 @@ static int set_brk(unsigned long start, unsigned long end)
 }
 
 /*
- * These are the only things you should do on a core-file: use only these
- * macros to write out all the necessary info.
- */
-
-static int dump_write(struct file *file, const void *addr, int nr)
-{
-       return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
-}
-
-#define DUMP_WRITE(addr, nr)   \
-       if (!dump_write(file, (void *)(addr), (nr))) \
-               goto end_coredump;
-
-#define DUMP_SEEK(offset) \
-if (file->f_op->llseek) { \
-       if (file->f_op->llseek(file,(offset),0) != (offset)) \
-               goto end_coredump; \
-} else file->f_pos = (offset)
-
-/*
  * Routine writes a core dump image in the current directory.
  * Currently only a stub-function.
  *
@@ -88,107 +67,70 @@ if (file->f_op->llseek) { \
  * dumping of the process results in another error..
  */
 
-static int aout_core_dump(long signr, struct pt_regs * regs, struct file *file)
+static int aout_core_dump(struct coredump_params *cprm)
 {
+       struct file *file = cprm->file;
        mm_segment_t fs;
        int has_dumped = 0;
-       unsigned long dump_start, dump_size;
+       void __user *dump_start;
+       int dump_size;
        struct user dump;
-#if defined(__alpha__)
-#       define START_DATA(u)   (u.start_data)
-#elif defined(__arm__)
-#      define START_DATA(u)    ((u.u_tsize << PAGE_SHIFT) + u.start_code)
-#elif defined(__sparc__)
-#       define START_DATA(u)    (u.u_tsize)
-#elif defined(__i386__) || defined(__mc68000__) || defined(__arch_um__)
-#       define START_DATA(u)   (u.u_tsize << PAGE_SHIFT)
-#endif
-#ifdef __sparc__
-#       define START_STACK(u)   ((regs->u_regs[UREG_FP]) & ~(PAGE_SIZE - 1))
+#ifdef __alpha__
+#       define START_DATA(u)   ((void __user *)u.start_data)
 #else
-#       define START_STACK(u)   (u.start_stack)
+#      define START_DATA(u)    ((void __user *)((u.u_tsize << PAGE_SHIFT) + \
+                                u.start_code))
 #endif
+#       define START_STACK(u)   ((void __user *)u.start_stack)
 
        fs = get_fs();
        set_fs(KERNEL_DS);
        has_dumped = 1;
        current->flags |= PF_DUMPCORE;
                strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm));
-#ifndef __sparc__
-       dump.u_ar0 = (void *)(((unsigned long)(&dump.regs)) - ((unsigned long)(&dump)));
-#endif
-       dump.signal = signr;
-       dump_thread(regs, &dump);
+       dump.u_ar0 = offsetof(struct user, regs);
+       dump.signal = cprm->signr;
+       aout_dump_thread(cprm->regs, &dump);
 
 /* If the size of the dump file exceeds the rlimit, then see what would happen
    if we wrote the stack, but not the data area.  */
-#ifdef __sparc__
-       if ((dump.u_dsize+dump.u_ssize) >
-           current->signal->rlim[RLIMIT_CORE].rlim_cur)
-               dump.u_dsize = 0;
-#else
-       if ((dump.u_dsize+dump.u_ssize+1) * PAGE_SIZE >
-           current->signal->rlim[RLIMIT_CORE].rlim_cur)
+       if ((dump.u_dsize + dump.u_ssize+1) * PAGE_SIZE > cprm->limit)
                dump.u_dsize = 0;
-#endif
 
 /* Make sure we have enough room to write the stack and data areas. */
-#ifdef __sparc__
-       if ((dump.u_ssize) >
-           current->signal->rlim[RLIMIT_CORE].rlim_cur)
-               dump.u_ssize = 0;
-#else
-       if ((dump.u_ssize+1) * PAGE_SIZE >
-           current->signal->rlim[RLIMIT_CORE].rlim_cur)
+       if ((dump.u_ssize + 1) * PAGE_SIZE > cprm->limit)
                dump.u_ssize = 0;
-#endif
 
 /* make sure we actually have a data and stack area to dump */
        set_fs(USER_DS);
-#ifdef __sparc__
-       if (!access_ok(VERIFY_READ, (void __user *)START_DATA(dump), dump.u_dsize))
-               dump.u_dsize = 0;
-       if (!access_ok(VERIFY_READ, (void __user *)START_STACK(dump), dump.u_ssize))
-               dump.u_ssize = 0;
-#else
-       if (!access_ok(VERIFY_READ, (void __user *)START_DATA(dump), dump.u_dsize << PAGE_SHIFT))
+       if (!access_ok(VERIFY_READ, START_DATA(dump), dump.u_dsize << PAGE_SHIFT))
                dump.u_dsize = 0;
-       if (!access_ok(VERIFY_READ, (void __user *)START_STACK(dump), dump.u_ssize << PAGE_SHIFT))
+       if (!access_ok(VERIFY_READ, START_STACK(dump), dump.u_ssize << PAGE_SHIFT))
                dump.u_ssize = 0;
-#endif
 
        set_fs(KERNEL_DS);
 /* struct user */
-       DUMP_WRITE(&dump,sizeof(dump));
+       if (!dump_write(file, &dump, sizeof(dump)))
+               goto end_coredump;
 /* Now dump all of the user data.  Include malloced stuff as well */
-#ifndef __sparc__
-       DUMP_SEEK(PAGE_SIZE);
-#endif
+       if (!dump_seek(cprm->file, PAGE_SIZE - sizeof(dump)))
+               goto end_coredump;
 /* now we start writing out the user space info */
        set_fs(USER_DS);
 /* Dump the data area */
        if (dump.u_dsize != 0) {
                dump_start = START_DATA(dump);
-#ifdef __sparc__
-               dump_size = dump.u_dsize;
-#else
                dump_size = dump.u_dsize << PAGE_SHIFT;
-#endif
-               DUMP_WRITE(dump_start,dump_size);
+               if (!dump_write(file, dump_start, dump_size))
+                       goto end_coredump;
        }
 /* Now prepare to dump the stack area */
        if (dump.u_ssize != 0) {
                dump_start = START_STACK(dump);
-#ifdef __sparc__
-               dump_size = dump.u_ssize;
-#else
                dump_size = dump.u_ssize << PAGE_SHIFT;
-#endif
-               DUMP_WRITE(dump_start,dump_size);
+               if (!dump_write(file, dump_start, dump_size))
+                       goto end_coredump;
        }
-/* Finally dump the task struct.  Not be used by gdb, but could be useful */
-       set_fs(KERNEL_DS);
-       DUMP_WRITE(current,sizeof(*current));
 end_coredump:
        set_fs(fs);
        return has_dumped;
@@ -208,29 +150,24 @@ static unsigned long __user *create_aout_tables(char __user *p, struct linux_bin
        int envc = bprm->envc;
 
        sp = (void __user *)((-(unsigned long)sizeof(char *)) & (unsigned long) p);
-#ifdef __sparc__
-       /* This imposes the proper stack alignment for a new process. */
-       sp = (void __user *) (((unsigned long) sp) & ~7);
-       if ((envc+argc+3)&1) --sp;
-#endif
 #ifdef __alpha__
 /* whee.. test-programs are so much fun. */
        put_user(0, --sp);
        put_user(0, --sp);
        if (bprm->loader) {
                put_user(0, --sp);
-               put_user(0x3eb, --sp);
+               put_user(1003, --sp);
                put_user(bprm->loader, --sp);
-               put_user(0x3ea, --sp);
+               put_user(1002, --sp);
        }
        put_user(bprm->exec, --sp);
-       put_user(0x3e9, --sp);
+       put_user(1001, --sp);
 #endif
        sp -= envc+1;
        envp = (char __user * __user *) sp;
        sp -= argc+1;
        argv = (char __user * __user *) sp;
-#if defined(__i386__) || defined(__mc68000__) || defined(__arm__) || defined(__arch_um__)
+#ifndef __alpha__
        put_user((unsigned long) envp,--sp);
        put_user((unsigned long) argv,--sp);
 #endif
@@ -291,7 +228,7 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
         * size limits imposed on them by creating programs with large
         * arrays in the data or bss.
         */
-       rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
+       rlim = rlimit(RLIMIT_DATA);
        if (rlim >= RLIM_INFINITY)
                rlim = ~0;
        if (ex.a_data + ex.a_bss > rlim)
@@ -303,16 +240,12 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                return retval;
 
        /* OK, This is the point of no return */
-#if defined(__alpha__)
+#ifdef __alpha__
        SET_AOUT_PERSONALITY(bprm, ex);
-#elif defined(__sparc__)
-       set_personality(PER_SUNOS);
-#if !defined(__sparc_v9__)
-       memcpy(&current->thread.core_exec, &ex, sizeof(struct exec));
-#endif
 #else
        set_personality(PER_LINUX);
 #endif
+       setup_new_exec(bprm);
 
        current->mm->end_code = ex.a_text +
                (current->mm->start_code = N_TXTADDR(ex));
@@ -323,27 +256,14 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
        current->mm->free_area_cache = current->mm->mmap_base;
        current->mm->cached_hole_size = 0;
 
-       current->mm->mmap = NULL;
-       compute_creds(bprm);
-       current->flags &= ~PF_FORKNOEXEC;
-#ifdef __sparc__
-       if (N_MAGIC(ex) == NMAGIC) {
-               loff_t pos = fd_offset;
-               /* Fuck me plenty... */
-               /* <AOL></AOL> */
-               down_write(&current->mm->mmap_sem);     
-               error = do_brk(N_TXTADDR(ex), ex.a_text);
-               up_write(&current->mm->mmap_sem);
-               bprm->file->f_op->read(bprm->file, (char *) N_TXTADDR(ex),
-                         ex.a_text, &pos);
-               down_write(&current->mm->mmap_sem);
-               error = do_brk(N_DATADDR(ex), ex.a_data);
-               up_write(&current->mm->mmap_sem);
-               bprm->file->f_op->read(bprm->file, (char *) N_DATADDR(ex),
-                         ex.a_data, &pos);
-               goto beyond_if;
+       retval = setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
+       if (retval < 0) {
+               /* Someone check-me: is this error path enough? */
+               send_sig(SIGKILL, current, 0);
+               return retval;
        }
-#endif
+
+       install_exec_creds(bprm);
 
        if (N_MAGIC(ex) == OMAGIC) {
                unsigned long text_addr, map_size;
@@ -351,16 +271,14 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 
                text_addr = N_TXTADDR(ex);
 
-#if defined(__alpha__) || defined(__sparc__)
+#ifdef __alpha__
                pos = fd_offset;
                map_size = ex.a_text+ex.a_data + PAGE_SIZE - 1;
 #else
                pos = 32;
                map_size = ex.a_text+ex.a_data;
 #endif
-               down_write(&current->mm->mmap_sem);
-               error = do_brk(text_addr & PAGE_MASK, map_size);
-               up_write(&current->mm->mmap_sem);
+               error = vm_brk(text_addr & PAGE_MASK, map_size);
                if (error != (text_addr & PAGE_MASK)) {
                        send_sig(SIGKILL, current, 0);
                        return error;
@@ -376,28 +294,22 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                         
                flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data);
        } else {
-               static unsigned long error_time, error_time2;
                if ((ex.a_text & 0xfff || ex.a_data & 0xfff) &&
-                   (N_MAGIC(ex) != NMAGIC) && (jiffies-error_time2) > 5*HZ)
+                   (N_MAGIC(ex) != NMAGIC) && printk_ratelimit())
                {
                        printk(KERN_NOTICE "executable not page aligned\n");
-                       error_time2 = jiffies;
                }
 
-               if ((fd_offset & ~PAGE_MASK) != 0 &&
-                   (jiffies-error_time) > 5*HZ)
+               if ((fd_offset & ~PAGE_MASK) != 0 && printk_ratelimit())
                {
                        printk(KERN_WARNING 
                               "fd_offset is not page aligned. Please convert program: %s\n",
                               bprm->file->f_path.dentry->d_name.name);
-                       error_time = jiffies;
                }
 
                if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
                        loff_t pos = fd_offset;
-                       down_write(&current->mm->mmap_sem);
-                       do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
-                       up_write(&current->mm->mmap_sem);
+                       vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
                        bprm->file->f_op->read(bprm->file,
                                        (char __user *)N_TXTADDR(ex),
                                        ex.a_text+ex.a_data, &pos);
@@ -407,24 +319,20 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                        goto beyond_if;
                }
 
-               down_write(&current->mm->mmap_sem);
-               error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
+               error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
                        PROT_READ | PROT_EXEC,
                        MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
                        fd_offset);
-               up_write(&current->mm->mmap_sem);
 
                if (error != N_TXTADDR(ex)) {
                        send_sig(SIGKILL, current, 0);
                        return error;
                }
 
-               down_write(&current->mm->mmap_sem);
-               error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
+               error = vm_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
                                PROT_READ | PROT_WRITE | PROT_EXEC,
                                MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
                                fd_offset + ex.a_text);
-               up_write(&current->mm->mmap_sem);
                if (error != N_DATADDR(ex)) {
                        send_sig(SIGKILL, current, 0);
                        return error;
@@ -439,25 +347,12 @@ beyond_if:
                return retval;
        }
 
-       retval = setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
-       if (retval < 0) { 
-               /* Someone check-me: is this error path enough? */ 
-               send_sig(SIGKILL, current, 0); 
-               return retval;
-       }
-
        current->mm->start_stack =
                (unsigned long) create_aout_tables((char __user *) bprm->p, bprm);
 #ifdef __alpha__
        regs->gp = ex.a_gpvalue;
 #endif
        start_thread(regs, ex.a_entry, current->mm->start_stack);
-       if (unlikely(current->ptrace & PT_PTRACED)) {
-               if (current->ptrace & PT_TRACE_EXEC)
-                       ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
-               else
-                       send_sig(SIGTRAP, current, 0);
-       }
        return 0;
 }
 
@@ -499,19 +394,15 @@ static int load_aout_library(struct file *file)
        start_addr =  ex.a_entry & 0xfffff000;
 
        if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) {
-               static unsigned long error_time;
                loff_t pos = N_TXTOFF(ex);
 
-               if ((jiffies-error_time) > 5*HZ)
+               if (printk_ratelimit())
                {
                        printk(KERN_WARNING 
                               "N_TXTOFF is not page aligned. Please convert library: %s\n",
                               file->f_path.dentry->d_name.name);
-                       error_time = jiffies;
                }
-               down_write(&current->mm->mmap_sem);
-               do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
-               up_write(&current->mm->mmap_sem);
+               vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
                
                file->f_op->read(file, (char __user *)start_addr,
                        ex.a_text + ex.a_data, &pos);
@@ -522,12 +413,10 @@ static int load_aout_library(struct file *file)
                goto out;
        }
        /* Now use mmap to map the library into memory. */
-       down_write(&current->mm->mmap_sem);
-       error = do_mmap(file, start_addr, ex.a_text + ex.a_data,
+       error = vm_mmap(file, start_addr, ex.a_text + ex.a_data,
                        PROT_READ | PROT_WRITE | PROT_EXEC,
                        MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
                        N_TXTOFF(ex));
-       up_write(&current->mm->mmap_sem);
        retval = error;
        if (error != start_addr)
                goto out;
@@ -535,9 +424,7 @@ static int load_aout_library(struct file *file)
        len = PAGE_ALIGN(ex.a_text + ex.a_data);
        bss = ex.a_text + ex.a_data + ex.a_bss;
        if (bss > len) {
-               down_write(&current->mm->mmap_sem);
-               error = do_brk(start_addr + len, bss - len);
-               up_write(&current->mm->mmap_sem);
+               error = vm_brk(start_addr + len, bss - len);
                retval = error;
                if (error != start_addr + len)
                        goto out;
@@ -549,7 +436,8 @@ out:
 
 static int __init init_aout_binfmt(void)
 {
-       return register_binfmt(&aout_format);
+       register_binfmt(&aout_format);
+       return 0;
 }
 
 static void __exit exit_aout_binfmt(void)