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Annotation of 43BSDReno/pgrm/pascal/pdx/process/rdwr.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)rdwr.c     5.3 (Berkeley) 4/7/87";
        !             9: #endif not lint
        !            10: 
        !            11: /*
        !            12:  * This routine is used to access the debuggee process from
        !            13:  * outside the "process" module.
        !            14:  *
        !            15:  * They invoke "pio" which eventually leads to a call to "ptrace".
        !            16:  * The system generates an I/O error when a ptrace fails, we catch
        !            17:  * that here and assume its due to a misguided address.
        !            18:  */
        !            19: 
        !            20: #include "defs.h"
        !            21: #include <errno.h>
        !            22: #include "process.h"
        !            23: #include "process.rep"
        !            24: 
        !            25: #      include "pxinfo.h"
        !            26: 
        !            27: typedef int INTFUNC();
        !            28: 
        !            29: extern INTFUNC *onsyserr();
        !            30: 
        !            31: LOCAL badaddr;
        !            32: LOCAL PIO_OP rwflg;
        !            33: LOCAL rwerr();
        !            34: 
        !            35: /*
        !            36:  * Read/Write to the process' data area.
        !            37:  */
        !            38: 
        !            39: drdwr(rw, buff, addr, nbytes)
        !            40: PIO_OP rw;
        !            41: char *buff;
        !            42: ADDRESS addr;
        !            43: int nbytes;
        !            44: {
        !            45:        INTFUNC *f;
        !            46: 
        !            47:        f = onsyserr(EIO, rwerr);
        !            48:        badaddr = addr;
        !            49:        rwflg = rw;
        !            50:        pio(process, rw, DATASEG, buff, addr, nbytes);
        !            51:        onsyserr(EIO, f);
        !            52: }
        !            53: 
        !            54: /*
        !            55:  * Error handler.
        !            56:  */
        !            57: 
        !            58: LOCAL rwerr()
        !            59: {
        !            60:        error("bad %s process address 0x%x",
        !            61:                rwflg == PREAD ? "read" : "write", badaddr);
        !            62: }

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