#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>
}
/*
- * 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;
-}
-
-static int dump_seek(struct file *file, loff_t off)
-{
- if (file->f_op->llseek && file->f_op->llseek != no_llseek) {
- if (file->f_op->llseek(file, off, SEEK_CUR) < 0)
- return 0;
- } else {
- char *buf = (char *)get_zeroed_page(GFP_KERNEL);
- if (!buf)
- return 0;
- while (off > 0) {
- unsigned long n = off;
- if (n > PAGE_SIZE)
- n = PAGE_SIZE;
- if (!dump_write(file, buf, n))
- return 0;
- off -= n;
- }
- free_page((unsigned long)buf);
- }
- return 1;
-}
-
-#define DUMP_WRITE(addr, nr) \
- if (!dump_write(file, (void *)(addr), (nr))) \
- goto end_coredump;
-
-/*
* Routine writes a core dump image in the current directory.
* Currently only a stub-function.
*
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);
/* 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 */
if (!dump_seek(cprm->file, PAGE_SIZE - sizeof(dump)))
goto end_coredump;
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));
+ if (!dump_write(file, current, sizeof(*current)))
+ goto end_coredump;
end_coredump:
set_fs(fs);
return has_dumped;