diff options
Diffstat (limited to 'include/asm-alpha/user.h')
-rw-r--r-- | include/asm-alpha/user.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/include/asm-alpha/user.h b/include/asm-alpha/user.h new file mode 100644 index 000000000000..7e417fc9d491 --- /dev/null +++ b/include/asm-alpha/user.h | |||
@@ -0,0 +1,53 @@ | |||
1 | #ifndef _ALPHA_USER_H | ||
2 | #define _ALPHA_USER_H | ||
3 | |||
4 | #include <linux/sched.h> | ||
5 | #include <linux/ptrace.h> | ||
6 | |||
7 | #include <asm/page.h> | ||
8 | #include <asm/reg.h> | ||
9 | |||
10 | /* | ||
11 | * Core file format: The core file is written in such a way that gdb | ||
12 | * can understand it and provide useful information to the user (under | ||
13 | * linux we use the `trad-core' bfd, NOT the osf-core). The file contents | ||
14 | * are as follows: | ||
15 | * | ||
16 | * upage: 1 page consisting of a user struct that tells gdb | ||
17 | * what is present in the file. Directly after this is a | ||
18 | * copy of the task_struct, which is currently not used by gdb, | ||
19 | * but it may come in handy at some point. All of the registers | ||
20 | * are stored as part of the upage. The upage should always be | ||
21 | * only one page long. | ||
22 | * data: The data segment follows next. We use current->end_text to | ||
23 | * current->brk to pick up all of the user variables, plus any memory | ||
24 | * that may have been sbrk'ed. No attempt is made to determine if a | ||
25 | * page is demand-zero or if a page is totally unused, we just cover | ||
26 | * the entire range. All of the addresses are rounded in such a way | ||
27 | * that an integral number of pages is written. | ||
28 | * stack: We need the stack information in order to get a meaningful | ||
29 | * backtrace. We need to write the data from usp to | ||
30 | * current->start_stack, so we round each of these in order to be able | ||
31 | * to write an integer number of pages. | ||
32 | */ | ||
33 | struct user { | ||
34 | unsigned long regs[EF_SIZE/8+32]; /* integer and fp regs */ | ||
35 | size_t u_tsize; /* text size (pages) */ | ||
36 | size_t u_dsize; /* data size (pages) */ | ||
37 | size_t u_ssize; /* stack size (pages) */ | ||
38 | unsigned long start_code; /* text starting address */ | ||
39 | unsigned long start_data; /* data starting address */ | ||
40 | unsigned long start_stack; /* stack starting address */ | ||
41 | long int signal; /* signal causing core dump */ | ||
42 | struct regs * u_ar0; /* help gdb find registers */ | ||
43 | unsigned long magic; /* identifies a core file */ | ||
44 | char u_comm[32]; /* user command name */ | ||
45 | }; | ||
46 | |||
47 | #define NBPG PAGE_SIZE | ||
48 | #define UPAGES 1 | ||
49 | #define HOST_TEXT_START_ADDR (u.start_code) | ||
50 | #define HOST_DATA_START_ADDR (u.start_data) | ||
51 | #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) | ||
52 | |||
53 | #endif /* _ALPHA_USER_H */ | ||