include/asm-ppc64/user.h

   1 #ifndef _PPC_USER_H
   2 #define _PPC_USER_H
   3
   4 /* Adapted from <asm-alpha/user.h>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <asm/ptrace.h>
  13 #include <asm/page.h>
  14
  15 /*
  16  * Core file format: The core file is written in such a way that gdb
  17  * can understand it and provide useful information to the user (under
  18  * linux we use the `trad-core' bfd, NOT the osf-core).  The file contents
  19  * are as follows:
  20  *
  21  *  upage: 1 page consisting of a user struct that tells gdb
  22  *      what is present in the file.  Directly after this is a
  23  *      copy of the task_struct, which is currently not used by gdb,
  24  *      but it may come in handy at some point.  All of the registers
  25  *      are stored as part of the upage.  The upage should always be
  26  *      only one page long.
  27  *  data: The data segment follows next.  We use current->end_text to
  28  *      current->brk to pick up all of the user variables, plus any memory
  29  *      that may have been sbrk'ed.  No attempt is made to determine if a
  30  *      page is demand-zero or if a page is totally unused, we just cover
  31  *      the entire range.  All of the addresses are rounded in such a way
  32  *      that an integral number of pages is written.
  33  *  stack: We need the stack information in order to get a meaningful
  34  *      backtrace.  We need to write the data from usp to
  35  *      current->start_stack, so we round each of these in order to be able
  36  *      to write an integer number of pages.
  37  */
  38 struct user {
  39         struct pt_regs  regs;                   /* entire machine state */
  40         size_t          u_tsize;                /* text size (pages) */
  41         size_t          u_dsize;                /* data size (pages) */
  42         size_t          u_ssize;                /* stack size (pages) */
  43         unsigned long   start_code;             /* text starting address */
  44         unsigned long   start_data;             /* data starting address */
  45         unsigned long   start_stack;            /* stack starting address */
  46         long int        signal;                 /* signal causing core dump */
  47         struct regs *   u_ar0;                  /* help gdb find registers */
  48         unsigned long   magic;                  /* identifies a core file */
  49         char            u_comm[32];             /* user command name */
  50 };
  51
  52 #define NBPG                    PAGE_SIZE
  53 #define UPAGES                  1
  54 #define HOST_TEXT_START_ADDR    (u.start_code)
  55 #define HOST_DATA_START_ADDR    (u.start_data)
  56 #define HOST_STACK_END_ADDR     (u.start_stack + u.u_ssize * NBPG)
  57
  58 #endif /* _PPC_USER_H */