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01a616f1 ML |
1 | /* Copyright (c) 1982 Regents of the University of California */ |
2 | ||
3 | static char sccsid[] = "@(#)rdwr.c 1.1 %G%"; | |
4 | ||
5 | /* | |
6 | * These routines are used to access the debuggee process from | |
7 | * outside the "process" module. | |
8 | * | |
9 | * They invoke "pio" which eventually leads to a call to "ptrace". | |
10 | * The system generates an I/O error when a ptrace fails, we catch | |
11 | * that here and assume its due to a misguided address. | |
12 | */ | |
13 | ||
14 | #include "defs.h" | |
15 | #include <errno.h> | |
16 | #include "process.h" | |
17 | #include "process.rep" | |
18 | ||
19 | # if (isvaxpx) | |
20 | # include "pxinfo.h" | |
21 | # endif | |
22 | ||
23 | typedef int INTFUNC(); | |
24 | ||
25 | extern INTFUNC *onsyserr(); | |
26 | ||
27 | LOCAL badaddr; | |
28 | LOCAL rwerr(); | |
29 | ||
30 | /* | |
31 | * Read from the process' instruction area. For px, this is actually | |
32 | * the data area. | |
33 | */ | |
34 | ||
35 | iread(buff, addr, nbytes) | |
36 | char *buff; | |
37 | ADDRESS addr; | |
38 | int nbytes; | |
39 | { | |
40 | INTFUNC *f; | |
41 | ||
42 | f = onsyserr(EIO, &rwerr); | |
43 | # if (isvaxpx) | |
44 | badaddr = addr + ENDOFF; | |
45 | pio(process, PREAD, DATASEG, buff, addr + ENDOFF, nbytes); | |
46 | # else | |
47 | badaddr = addr; | |
48 | pio(process, PREAD, TEXTSEG, buff, addr, nbytes); | |
49 | # endif | |
50 | onsyserr(EIO, f); | |
51 | } | |
52 | ||
53 | /* | |
54 | * Write to the process' instruction area, usually in order to set | |
55 | * or unset a breakpoint. | |
56 | */ | |
57 | ||
58 | iwrite(buff, addr, nbytes) | |
59 | char *buff; | |
60 | ADDRESS addr; | |
61 | int nbytes; | |
62 | { | |
63 | INTFUNC *f; | |
64 | ||
65 | f = onsyserr(EIO, &rwerr); | |
66 | # if (isvaxpx) | |
67 | badaddr = addr + ENDOFF; | |
68 | pio(process, PWRITE, DATASEG, buff, addr + ENDOFF, nbytes); | |
69 | # else | |
70 | badaddr = addr; | |
71 | pio(process, PWRITE, TEXTSEG, buff, addr, nbytes); | |
72 | # endif | |
73 | onsyserr(EIO, f); | |
74 | } | |
75 | ||
76 | /* | |
77 | * Read for the process' data area. | |
78 | */ | |
79 | ||
80 | dread(buff, addr, nbytes) | |
81 | char *buff; | |
82 | ADDRESS addr; | |
83 | int nbytes; | |
84 | { | |
85 | INTFUNC *f; | |
86 | ||
87 | f = onsyserr(EIO, &rwerr); | |
88 | badaddr = addr; | |
89 | pio(process, PREAD, DATASEG, buff, addr, nbytes); | |
90 | onsyserr(EIO, f); | |
91 | } | |
92 | ||
93 | /* | |
94 | * Write to the process' data area. | |
95 | */ | |
96 | ||
97 | dwrite(buff, addr, nbytes) | |
98 | char *buff; | |
99 | ADDRESS addr; | |
100 | int nbytes; | |
101 | { | |
102 | INTFUNC *f; | |
103 | ||
104 | f = onsyserr(EIO, &rwerr); | |
105 | badaddr = addr; | |
106 | pio(process, PWRITE, DATASEG, buff, addr, nbytes); | |
107 | onsyserr(EIO, f); | |
108 | } | |
109 | ||
110 | /* | |
111 | * Error handler. | |
112 | */ | |
113 | ||
114 | LOCAL rwerr() | |
115 | { | |
116 | error("bad read/write process address 0x%x", badaddr); | |
117 | } |