date and time created 81/05/14 15:19:40 by root

SCCS-vsn: old/adb/adb.vax/access.c 4.1

diff --git a/usr/src/old/adb/adb.vax/access.c b/usr/src/old/adb/adb.vax/access.c
new file mode 100644 (file)
index 0000000..f6c87bf
--- /dev/null
+++ b/usr/src/old/adb/adb.vax/access.c
@@ -0,0 +1,135 @@
+#
+/*
+ *
+ *     UNIX debugger
+ *
+ */
+
+#include "defs.h"
+static char sccsid[] = "@(#)access.c 4.1 %G%";
+
+MSG            ODDADR;
+MSG            BADDAT;
+MSG            BADTXT;
+MAP            txtmap;
+MAP            datmap;
+INT            wtflag;
+STRING         errflg;
+INT            errno;
+
+INT            pid;
+
+/* file handling and access routines */
+
+put(adr,space,value)
+#ifndef EDDT
+L_INT  adr;
+{
+       access(WT,adr,space,value);
+}
+#else
+       L_INT *adr; {*adr=value;}
+#endif
+
+POS    get(adr, space)
+#ifndef EDDT
+L_INT          adr;
+{
+       return(access(RD,adr,space,0));
+}
+#else
+       L_INT *adr; {return(*adr);}
+#endif
+
+POS    chkget(n, space)
+L_INT          n;
+{
+#ifndef vax
+       REG INT         w;
+#else
+       REG L_INT       w;
+#endif
+
+       w = get(n, space);
+       chkerr();
+       return(w);
+}
+
+POS bchkget(n, space) 
+L_INT  n;
+{
+       return(chkget(n, space) & LOBYTE);
+}
+
+#ifndef EDDT
+access(mode,adr,space,value)
+L_INT  adr;
+{
+       INT     pmode,rd,file;
+       ADDR    w;
+       rd = mode==RD;
+
+       IF space == NSP THEN return(0); FI
+
+       IF pid          /* tracing on? */
+       THEN
+#ifndef vax
+               IF adr&01 ANDF !rd THEN error(ODDADR); FI
+#endif
+            pmode = (space&DSP?(rd?RDUSER:WDUSER):(rd?RIUSER:WIUSER));
+            w = ptrace(pmode, pid, adr, value);
+#ifndef vax
+            IF adr&01
+            THEN w1 = ptrace(pmode, pid, shorten(adr+1), value);
+                 w = (w>>8)&LOBYTE | (w1<<8);
+            FI
+#endif
+            IF errno
+            THEN errflg = (space&DSP ? BADDAT : BADTXT);
+            FI
+            return(w);
+       FI
+       w = 0;
+       IF mode==WT ANDF wtflag==0
+       THEN    error("not in write mode");
+       FI
+       IF !chkmap(&adr,space)
+       THEN return(0);
+       FI
+       file=(space&DSP?datmap.ufd:txtmap.ufd);
+       IF longseek(file,adr)==0 ORF
+          (rd ? read(file,&w,sizeof(w)) : write(file,&value,sizeof(w))) < 1
+       THEN    errflg=(space&DSP?BADDAT:BADTXT);
+       FI
+       return(w);
+
+}
+#endif
+
+chkmap(adr,space)
+       REG L_INT       *adr;
+       REG INT         space;
+{
+       REG MAPPTR amap;
+       amap=((space&DSP?&datmap:&txtmap));
+       IF space&STAR ORF !within(*adr,amap->b1,amap->e1)
+       THEN IF within(*adr,amap->b2,amap->e2)
+            THEN *adr += (amap->f2)-(amap->b2);
+            ELSE errflg=(space&DSP?BADDAT:BADTXT); return(0);
+            FI
+       ELSE *adr += (amap->f1)-(amap->b1);
+       FI
+       return(1);
+}
+
+within(adr,lbd,ubd)
+POS    adr, lbd, ubd;
+{
+       return(adr>=lbd && adr<ubd);
+}
+
+longseek(f, a)
+L_INT a;
+{
+       return(lseek(f,a,0) != -1);
+}