1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 /*
3 * S390 version
4 *
5 * Derived from "include/asm-i386/usr.h"
6 */
7
8 #ifndef _S390_USER_H
9 #define _S390_USER_H
10
11 #include <asm/page.h>
12 #include <asm/ptrace.h>
13 /* Core file format: The core file is written
14 can understand it and provide useful inform
15 linux we use the 'trad-core' bfd). There a
16 obstacles to being able to view the content
17 registers, and until these are solved you w
18 contents of them. Actually, you can read i
19 the contents of the user struct to find out
20 registers contain.
21 The actual file contents are as follows:
22 UPAGE: 1 page consisting of a user struct t
23 in the file. Directly after this is a copy
24 is currently not used by gdb, but it may co
25 All of the registers are stored as part of
26 always be only one page.
27 DATA: The data area is stored. We use curr
28 current->brk to pick up all of the user var
29 that may have been malloced. No attempt is
30 is demand-zero or if a page is totally unus
31 range. All of the addresses are rounded in
32 number of pages is written.
33 STACK: We need the stack information in ord
34 backtrace. We need to write the data from
35 current->start_stack, so we round each of t
36 to write an integer number of pages.
37 The minimum core file size is 3 pages, or 1
38 */
39
40
41 /*
42 * This is the old layout of "struct pt_regs",
43 * is still the layout used by user mode (the
44 * pt_regs doesn't have all registers as the k
45 * doesn't use the extra segment registers)
46 */
47
48 /* When the kernel dumps core, it starts by du
49 this will be used by gdb to figure out wher
50 are within the file, and what virtual addre
51 struct user {
52 /* We start with the registers, to mimic the w
53 from the ptrace(3,...) function. */
54 struct user_regs_struct regs; /* Whe
55 /* The rest of this junk is to help gdb figure
56 unsigned long int u_tsize; /* Text segmen
57 unsigned long int u_dsize; /* Data segmen
58 unsigned long int u_ssize; /* Stack segme
59 unsigned long start_code; /* Starting vi
60 unsigned long start_stack; /* Starting vi
61 This is act
62 the top of
63 esp registe
64 long int signal; /* Signal that
65 unsigned long u_ar0; /* Used by gdb
66 /* the registe
67 unsigned long magic; /* To uniquely
68 char u_comm[32]; /* User comman
69 };
70
71 #endif /* _S390_USER_H */
72
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