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user.h
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1 #ifndef _ASM_M32R_USER_H
2 #define _ASM_M32R_USER_H
3 
4 #include <linux/types.h>
5 #include <asm/ptrace.h>
6 #include <asm/page.h>
7 
8 /*
9  * Core file format: The core file is written in such a way that gdb
10  * can understand it and provide useful information to the user (under
11  * linux we use the `trad-core' bfd).
12  *
13  * The actual file contents are as follows:
14  * UPAGE: 1 page consisting of a user struct that tells gdb
15  * what is present in the file. Directly after this is a
16  * copy of the task_struct, which is currently not used by gdb,
17  * but it may come in handy at some point. All of the registers
18  * are stored as part of the upage. The upage should always be
19  * only one page.
20  * DATA: The data area is stored. We use current->end_text to
21  * current->brk to pick up all of the user variables, plus any memory
22  * that may have been sbrk'ed. No attempt is made to determine if a
23  * page is demand-zero or if a page is totally unused, we just cover
24  * the entire range. All of the addresses are rounded in such a way
25  * that an integral number of pages is written.
26  * STACK: We need the stack information in order to get a meaningful
27  * backtrace. We need to write the data from usp to
28  * current->start_stack, so we round each of these off in order to be
29  * able to write an integer number of pages.
30  */
31 
32 struct user {
33  struct pt_regs regs; /* entire machine state */
34  size_t u_tsize; /* text size (pages) */
35  size_t u_dsize; /* data size (pages) */
36  size_t u_ssize; /* stack size (pages) */
37  unsigned long start_code; /* text starting address */
38  unsigned long start_data; /* data starting address */
39  unsigned long start_stack; /* stack starting address */
40  long int signal; /* signal causing core dump */
41  unsigned long u_ar0; /* help gdb find registers */
42  unsigned long magic; /* identifies a core file */
43  char u_comm[32]; /* user command name */
44 };
45 
46 #define NBPG PAGE_SIZE
47 #define UPAGES 1
48 #define HOST_TEXT_START_ADDR (u.start_code)
49 #define HOST_DATA_START_ADDR (u.start_data)
50 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
51 
52 #endif /* _ASM_M32R_USER_H */