date and time created 82/01/18 19:20:48 by linton

SCCS-vsn: usr.bin/pascal/pdx/process/process.rep 1.1

diff --git a/usr/src/usr.bin/pascal/pdx/process/process.rep b/usr/src/usr.bin/pascal/pdx/process/process.rep
new file mode 100644 (file)
index 0000000..8be8c4c
--- /dev/null
+++ b/usr/src/usr.bin/pascal/pdx/process/process.rep
@@ -0,0 +1,59 @@
+/* Copyright (c) 1982 Regents of the University of California */
+
+static char sccsid[] = "@(#)process.rep 1.1 %G%";
+
+/*
+ * This file defines the representation of a process.
+ * It is MACHINE DEPENDENT.
+ */
+
+#define STOPPED 0177
+#define FINISHED 0
+
+#define NREG 12                        /* maximum number of saved registers */
+#define CSIZE 101              /* size of instruction cache */
+
+/*
+ * Cache-ing of instruction segment is done to reduce the number
+ * of calls to ptrace.
+ */
+
+typedef struct {
+       WORD addr;
+       WORD val;
+} CACHEWORD;
+
+/*
+ * This structure holds the information we need from the user structure.
+ */
+
+struct process {
+       int pid;                /* process being traced */
+       WORD reg[NREG];         /* process's registers */
+       WORD ap, fp, sp, pc;    /* special registers */
+       WORD oreg[NREG];        /* registers when process last stopped */
+       WORD oap, ofp, osp, opc;/* special registers when process stopped */
+       int status;             /* either STOPPED or FINISHED */
+       int signo;              /* signal that stopped process */
+       int exitval;            /* return value from exit() */
+       long sigset;            /* bit array of traced signals */
+       CACHEWORD word[CSIZE];  /* text segment cache */
+};
+
+/*
+ * Process manipulation routines local to this module.
+ */
+
+pstart();                      /* start up a process */
+pcont();                       /* continue execution */
+pstep();                       /* single step */
+pio();                         /* process memory move */
+psigtrace();                   /* catch/don't catch a signal */
+unsetsigtraces();              /* don't catch any signals */
+
+/*
+ * These definitions are for the arguments to "pio".
+ */
+
+typedef enum { PREAD, PWRITE } PIO_OP;
+typedef enum { TEXTSEG, DATASEG } PIO_SEG;