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1 | #ifndef _BFIN_USER_H |
2 | #define _BFIN_USER_H | |
3 | ||
4 | /* Changes by Tony Kou Lineo, Inc. July, 2001 | |
5 | * | |
6 | * Based include/asm-m68knommu/user.h | |
7 | * | |
8 | */ | |
9 | ||
10 | /* Core file format: The core file is written in such a way that gdb | |
11 | can understand it and provide useful information to the user (under | |
12 | linux we use the 'trad-core' bfd). There are quite a number of | |
13 | obstacles to being able to view the contents of the floating point | |
14 | registers, and until these are solved you will not be able to view the | |
15 | contents of them. Actually, you can read in the core file and look at | |
16 | the contents of the user struct to find out what the floating point | |
17 | registers contain. | |
18 | The actual file contents are as follows: | |
19 | UPAGE: 1 page consisting of a user struct that tells gdb what is present | |
20 | in the file. Directly after this is a copy of the task_struct, which | |
21 | is currently not used by gdb, but it may come in useful at some point. | |
22 | All of the registers are stored as part of the upage. The upage should | |
23 | always be only one page. | |
24 | DATA: The data area is stored. We use current->end_text to | |
25 | current->brk to pick up all of the user variables, plus any memory | |
26 | that may have been malloced. No attempt is made to determine if a page | |
27 | is demand-zero or if a page is totally unused, we just cover the entire | |
28 | range. All of the addresses are rounded in such a way that an integral | |
29 | number of pages is written. | |
30 | STACK: We need the stack information in order to get a meaningful | |
31 | backtrace. We need to write the data from (esp) to | |
32 | current->start_stack, so we round each of these off in order to be able | |
33 | to write an integer number of pages. | |
34 | The minimum core file size is 3 pages, or 12288 bytes. | |
35 | */ | |
36 | struct user_bfinfp_struct { | |
37 | }; | |
38 | ||
39 | /* This is the old layout of "struct pt_regs" as of Linux 1.x, and | |
40 | is still the layout used by user (the new pt_regs doesn't have | |
41 | all registers). */ | |
42 | struct user_regs_struct { | |
43 | long r0, r1, r2, r3, r4, r5, r6, r7; | |
44 | long p0, p1, p2, p3, p4, p5, usp, fp; | |
45 | long i0, i1, i2, i3; | |
46 | long l0, l1, l2, l3; | |
47 | long b0, b1, b2, b3; | |
48 | long m0, m1, m2, m3; | |
49 | long a0w, a1w; | |
50 | long a0x, a1x; | |
51 | unsigned long rets; | |
52 | unsigned long astat; | |
53 | unsigned long pc; | |
54 | unsigned long orig_p0; | |
55 | }; | |
56 | ||
57 | /* When the kernel dumps core, it starts by dumping the user struct - | |
58 | this will be used by gdb to figure out where the data and stack segments | |
59 | are within the file, and what virtual addresses to use. */ | |
60 | ||
61 | struct user { | |
62 | /* We start with the registers, to mimic the way that "memory" is returned | |
63 | from the ptrace(3,...) function. */ | |
64 | ||
65 | struct user_regs_struct regs; /* Where the registers are actually stored */ | |
66 | ||
67 | /* The rest of this junk is to help gdb figure out what goes where */ | |
68 | unsigned long int u_tsize; /* Text segment size (pages). */ | |
69 | unsigned long int u_dsize; /* Data segment size (pages). */ | |
70 | unsigned long int u_ssize; /* Stack segment size (pages). */ | |
71 | unsigned long start_code; /* Starting virtual address of text. */ | |
72 | unsigned long start_stack; /* Starting virtual address of stack area. | |
73 | This is actually the bottom of the stack, | |
74 | the top of the stack is always found in the | |
75 | esp register. */ | |
76 | long int signal; /* Signal that caused the core dump. */ | |
77 | int reserved; /* No longer used */ | |
6e16d89b | 78 | unsigned long u_ar0; |
1394f032 BW |
79 | /* Used by gdb to help find the values for */ |
80 | /* the registers. */ | |
81 | unsigned long magic; /* To uniquely identify a core file */ | |
82 | char u_comm[32]; /* User command that was responsible */ | |
83 | }; | |
84 | #define NBPG PAGE_SIZE | |
85 | #define UPAGES 1 | |
86 | #define HOST_TEXT_START_ADDR (u.start_code) | |
87 | #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) | |
88 | ||
89 | #endif |