net: wireless: sd8797: change wlan interface to wlan0
[linux-2.6.git] / fs / binfmt_aout.c
index fdd3970..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>
@@ -50,9 +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;
        }
@@ -60,26 +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.
  *
@@ -94,14 +72,16 @@ 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;
 #ifdef __alpha__
-#       define START_DATA(u)   (u.start_data)
+#       define START_DATA(u)   ((void __user *)u.start_data)
 #else
-#      define START_DATA(u)    ((u.u_tsize << PAGE_SHIFT) + u.start_code)
+#      define START_DATA(u)    ((void __user *)((u.u_tsize << PAGE_SHIFT) + \
+                                u.start_code))
 #endif
-#       define START_STACK(u)   (u.start_stack)
+#       define START_STACK(u)   ((void __user *)u.start_stack)
 
        fs = get_fs();
        set_fs(KERNEL_DS);
@@ -123,33 +103,34 @@ static int aout_core_dump(struct coredump_params *cprm)
 
 /* make sure we actually have a data and stack area to dump */
        set_fs(USER_DS);
-       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;
 
        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 */
-       DUMP_SEEK(PAGE_SIZE);
+       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);
                dump_size = dump.u_dsize << PAGE_SHIFT;
-               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);
                dump_size = dump.u_ssize << PAGE_SHIFT;
-               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;
@@ -247,7 +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)
@@ -275,8 +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;
 
+       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;
+       }
+
        install_exec_creds(bprm);
-       current->flags &= ~PF_FORKNOEXEC;
 
        if (N_MAGIC(ex) == OMAGIC) {
                unsigned long text_addr, map_size;
@@ -291,9 +278,7 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                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;
@@ -324,9 +309,7 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 
                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);
@@ -336,24 +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;
@@ -368,13 +347,6 @@ 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__
@@ -430,9 +402,7 @@ static int load_aout_library(struct file *file)
                               "N_TXTOFF is not page aligned. Please convert library: %s\n",
                               file->f_path.dentry->d_name.name);
                }
-               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);
@@ -443,12 +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;
@@ -456,9 +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;
@@ -470,7 +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)