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1da177e4 LT |
1 | #ifdef __KERNEL__ |
2 | #ifndef _PPC_USER_H | |
3 | #define _PPC_USER_H | |
4 | ||
5 | /* Adapted from <asm-alpha/user.h> */ | |
6 | ||
7 | #include <linux/ptrace.h> | |
8 | #include <asm/page.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 | struct pt_regs regs; /* entire machine state */ | |
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 /* _PPC_USER_H */ | |
54 | #endif /* __KERNEL__ */ |