projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 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 | } |