user.h 2.2 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef __ASM_SH_USER_H
  3. #define __ASM_SH_USER_H
  4. #include <asm/ptrace.h>
  5. #include <asm/page.h>
  6. /*
  7. * Core file format: The core file is written in such a way that gdb
  8. * can understand it and provide useful information to the user (under
  9. * linux we use the `trad-core' bfd). The file contents are as follows:
  10. *
  11. * upage: 1 page consisting of a user struct that tells gdb
  12. * what is present in the file. Directly after this is a
  13. * copy of the task_struct, which is currently not used by gdb,
  14. * but it may come in handy at some point. All of the registers
  15. * are stored as part of the upage. The upage should always be
  16. * only one page long.
  17. * data: The data segment follows next. We use current->end_text to
  18. * current->brk to pick up all of the user variables, plus any memory
  19. * that may have been sbrk'ed. No attempt is made to determine if a
  20. * page is demand-zero or if a page is totally unused, we just cover
  21. * the entire range. All of the addresses are rounded in such a way
  22. * that an integral number of pages is written.
  23. * stack: We need the stack information in order to get a meaningful
  24. * backtrace. We need to write the data from usp to
  25. * current->start_stack, so we round each of these in order to be able
  26. * to write an integer number of pages.
  27. */
  28. struct user_fpu_struct {
  29. unsigned long fp_regs[16];
  30. unsigned long xfp_regs[16];
  31. unsigned long fpscr;
  32. unsigned long fpul;
  33. };
  34. struct user {
  35. struct pt_regs regs; /* entire machine state */
  36. struct user_fpu_struct fpu; /* Math Co-processor registers */
  37. int u_fpvalid; /* True if math co-processor being used */
  38. size_t u_tsize; /* text size (pages) */
  39. size_t u_dsize; /* data size (pages) */
  40. size_t u_ssize; /* stack size (pages) */
  41. unsigned long start_code; /* text starting address */
  42. unsigned long start_data; /* data starting address */
  43. unsigned long start_stack; /* stack starting address */
  44. long int signal; /* signal causing core dump */
  45. unsigned long u_ar0; /* help gdb find registers */
  46. struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */
  47. unsigned long magic; /* identifies a core file */
  48. char u_comm[32]; /* user command name */
  49. };
  50. #endif /* __ASM_SH_USER_H */