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user.h
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1 #ifndef __ASM_SH_USER_H
2 #define __ASM_SH_USER_H
3 
4 #include <asm/ptrace.h>
5 #include <asm/page.h>
6 
7 /*
8  * Core file format: The core file is written in such a way that gdb
9  * can understand it and provide useful information to the user (under
10  * linux we use the `trad-core' bfd). The file contents are as follows:
11  *
12  * upage: 1 page consisting of a user struct that tells gdb
13  * what is present in the file. Directly after this is a
14  * copy of the task_struct, which is currently not used by gdb,
15  * but it may come in handy at some point. All of the registers
16  * are stored as part of the upage. The upage should always be
17  * only one page long.
18  * data: The data segment follows next. We use current->end_text to
19  * current->brk to pick up all of the user variables, plus any memory
20  * that may have been sbrk'ed. No attempt is made to determine if a
21  * page is demand-zero or if a page is totally unused, we just cover
22  * the entire range. All of the addresses are rounded in such a way
23  * that an integral number of pages is written.
24  * stack: We need the stack information in order to get a meaningful
25  * backtrace. We need to write the data from usp to
26  * current->start_stack, so we round each of these in order to be able
27  * to write an integer number of pages.
28  */
29 
30 #if defined(__SH5__) || defined(CONFIG_CPU_SH5)
31 struct user_fpu_struct {
32  unsigned long fp_regs[32];
33  unsigned int fpscr;
34 };
35 #else
36 struct user_fpu_struct {
37  unsigned long fp_regs[16];
38  unsigned long xfp_regs[16];
39  unsigned long fpscr;
40  unsigned long fpul;
41 };
42 #endif
43 
44 struct user {
45  struct pt_regs regs; /* entire machine state */
46  struct user_fpu_struct fpu; /* Math Co-processor registers */
47  int u_fpvalid; /* True if math co-processor being used */
48  size_t u_tsize; /* text size (pages) */
49  size_t u_dsize; /* data size (pages) */
50  size_t u_ssize; /* stack size (pages) */
51  unsigned long start_code; /* text starting address */
52  unsigned long start_data; /* data starting address */
53  unsigned long start_stack; /* stack starting address */
54  long int signal; /* signal causing core dump */
55  unsigned long u_ar0; /* help gdb find registers */
56  struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */
57  unsigned long magic; /* identifies a core file */
58  char u_comm[32]; /* user command name */
59 };
60 
61 #define NBPG PAGE_SIZE
62 #define UPAGES 1
63 #define HOST_TEXT_START_ADDR (u.start_code)
64 #define HOST_DATA_START_ADDR (u.start_data)
65 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
66 
67 #endif /* __ASM_SH_USER_H */