1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _M68K_USER_H
3 #define _M68K_USER_H
4
5 /* Core file format: The core file is written
6 can understand it and provide useful inform
7 linux we use the 'trad-core' bfd). There a
8 obstacles to being able to view the content
9 registers, and until these are solved you w
10 contents of them. Actually, you can read i
11 the contents of the user struct to find out
12 registers contain.
13 The actual file contents are as follows:
14 UPAGE: 1 page consisting of a user struct t
15 in the file. Directly after this is a copy
16 is currently not used by gdb, but it may co
17 All of the registers are stored as part of
18 always be only one page.
19 DATA: The data area is stored. We use curr
20 current->brk to pick up all of the user var
21 that may have been malloced. No attempt is
22 is demand-zero or if a page is totally unus
23 range. All of the addresses are rounded in
24 number of pages is written.
25 STACK: We need the stack information in ord
26 backtrace. We need to write the data from
27 current->start_stack, so we round each of t
28 to write an integer number of pages.
29 The minimum core file size is 3 pages, or 1
30 */
31
32 struct user_m68kfp_struct {
33 unsigned long fpregs[8*3]; /* fp0
34 unsigned long fpcntl[3]; /* fp
35 };
36
37 /* This is the old layout of "struct pt_regs"
38 is still the layout used by user (the new p
39 all registers). */
40 struct user_regs_struct {
41 long d1,d2,d3,d4,d5,d6,d7;
42 long a0,a1,a2,a3,a4,a5,a6;
43 long d0;
44 long usp;
45 long orig_d0;
46 short stkadj;
47 short sr;
48 long pc;
49 short fmtvec;
50 short __fill;
51 };
52
53
54 /* When the kernel dumps core, it starts by du
55 this will be used by gdb to figure out wher
56 are within the file, and what virtual addre
57 struct user{
58 /* We start with the registers, to mimic the w
59 from the ptrace(3,...) function. */
60 struct user_regs_struct regs; /* Where the r
61 /* ptrace does not yet supply these. Someday.
62 int u_fpvalid; /* True if mat
63 /* for this me
64 struct user_m68kfp_struct m68kfp; /* Math Co
65 /* The rest of this junk is to help gdb figure
66 unsigned long int u_tsize; /* Text segmen
67 unsigned long int u_dsize; /* Data segmen
68 unsigned long int u_ssize; /* Stack segme
69 unsigned long start_code; /* Starting vi
70 unsigned long start_stack; /* Starting vi
71 This is act
72 the top of
73 esp registe
74 long int signal; /* Signal that
75 int reserved; /* No longer u
76 unsigned long u_ar0; /* Used by gdb
77 /* the registe
78 struct user_m68kfp_struct* u_fpstate; /* Mat
79 unsigned long magic; /* To uniquely
80 char u_comm[32]; /* User comman
81 };
82
83 #endif
84
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