diff options
author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-08-02 05:55:55 -0400 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-08-02 16:32:35 -0400 |
commit | 4baa9922430662431231ac637adedddbb0cfb2d7 (patch) | |
tree | e8fb765ce3e41c01f33de34a0bc9494f0ae19818 /arch/arm/include/asm/user.h | |
parent | ff4db0a043a5dee7180bdffd178e61cd02812c68 (diff) |
[ARM] move include/asm-arm to arch/arm/include/asm
Move platform independent header files to arch/arm/include/asm, leaving
those in asm/arch* and asm/plat* alone.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/user.h')
-rw-r--r-- | arch/arm/include/asm/user.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/arm/include/asm/user.h b/arch/arm/include/asm/user.h new file mode 100644 index 000000000000..825c1e7c582d --- /dev/null +++ b/arch/arm/include/asm/user.h | |||
@@ -0,0 +1,84 @@ | |||
1 | #ifndef _ARM_USER_H | ||
2 | #define _ARM_USER_H | ||
3 | |||
4 | #include <asm/page.h> | ||
5 | #include <asm/ptrace.h> | ||
6 | /* Core file format: The core file is written in such a way that gdb | ||
7 | can understand it and provide useful information to the user (under | ||
8 | linux we use the 'trad-core' bfd). There are quite a number of | ||
9 | obstacles to being able to view the contents of the floating point | ||
10 | registers, and until these are solved you will not be able to view the | ||
11 | contents of them. Actually, you can read in the core file and look at | ||
12 | the contents of the user struct to find out what the floating point | ||
13 | registers contain. | ||
14 | The actual file contents are as follows: | ||
15 | UPAGE: 1 page consisting of a user struct that tells gdb what is present | ||
16 | in the file. Directly after this is a copy of the task_struct, which | ||
17 | is currently not used by gdb, but it may come in useful at some point. | ||
18 | All of the registers are stored as part of the upage. The upage should | ||
19 | always be 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 malloced. No attempt is made to determine if a page | ||
23 | is demand-zero or if a page is totally unused, we just cover the entire | ||
24 | range. All of the addresses are rounded in such a way that an integral | ||
25 | 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 (esp) to | ||
28 | current->start_stack, so we round each of these off in order to be able | ||
29 | to write an integer number of pages. | ||
30 | The minimum core file size is 3 pages, or 12288 bytes. | ||
31 | */ | ||
32 | |||
33 | struct user_fp { | ||
34 | struct fp_reg { | ||
35 | unsigned int sign1:1; | ||
36 | unsigned int unused:15; | ||
37 | unsigned int sign2:1; | ||
38 | unsigned int exponent:14; | ||
39 | unsigned int j:1; | ||
40 | unsigned int mantissa1:31; | ||
41 | unsigned int mantissa0:32; | ||
42 | } fpregs[8]; | ||
43 | unsigned int fpsr:32; | ||
44 | unsigned int fpcr:32; | ||
45 | unsigned char ftype[8]; | ||
46 | unsigned int init_flag; | ||
47 | }; | ||
48 | |||
49 | /* When the kernel dumps core, it starts by dumping the user struct - | ||
50 | this will be used by gdb to figure out where the data and stack segments | ||
51 | are within the file, and what virtual addresses to use. */ | ||
52 | struct user{ | ||
53 | /* We start with the registers, to mimic the way that "memory" is returned | ||
54 | from the ptrace(3,...) function. */ | ||
55 | struct pt_regs regs; /* Where the registers are actually stored */ | ||
56 | /* ptrace does not yet supply these. Someday.... */ | ||
57 | int u_fpvalid; /* True if math co-processor being used. */ | ||
58 | /* for this mess. Not yet used. */ | ||
59 | /* The rest of this junk is to help gdb figure out what goes where */ | ||
60 | unsigned long int u_tsize; /* Text segment size (pages). */ | ||
61 | unsigned long int u_dsize; /* Data segment size (pages). */ | ||
62 | unsigned long int u_ssize; /* Stack segment size (pages). */ | ||
63 | unsigned long start_code; /* Starting virtual address of text. */ | ||
64 | unsigned long start_stack; /* Starting virtual address of stack area. | ||
65 | This is actually the bottom of the stack, | ||
66 | the top of the stack is always found in the | ||
67 | esp register. */ | ||
68 | long int signal; /* Signal that caused the core dump. */ | ||
69 | int reserved; /* No longer used */ | ||
70 | unsigned long u_ar0; /* Used by gdb to help find the values for */ | ||
71 | /* the registers. */ | ||
72 | unsigned long magic; /* To uniquely identify a core file */ | ||
73 | char u_comm[32]; /* User command that was responsible */ | ||
74 | int u_debugreg[8]; | ||
75 | struct user_fp u_fp; /* FP state */ | ||
76 | struct user_fp_struct * u_fp0;/* Used by gdb to help find the values for */ | ||
77 | /* the FP registers. */ | ||
78 | }; | ||
79 | #define NBPG PAGE_SIZE | ||
80 | #define UPAGES 1 | ||
81 | #define HOST_TEXT_START_ADDR (u.start_code) | ||
82 | #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) | ||
83 | |||
84 | #endif /* _ARM_USER_H */ | ||