Initial version

2021-10-11 22:27:00 +02:00 · 2021-10-11 22:27:00 +02:00 · 6f405265a5
commit 6f405265a5
102 changed files with 14486 additions and 0 deletions
--- a/code/bin/disasm.c
+++ b/code/bin/disasm.c
@ -0,0 +1,172 @@
+/*
+ Copyright (c) 1992-1993 The Regents of the University of California.
+ All rights reserved.  See copyright.h for copyright notice and limitation 
+ of liability and disclaimer of warranty provisions.
+ */
+
+#include "copyright.h"
+
+/* MIPS instruction disassembler */
+
+#include <stdio.h>
+#include <filehdr.h>
+#include <scnhdr.h>
+#include <syms.h>
+#include <ldfcn.h>
+#include "int.h"
+
+static FILE *fp;
+static LDFILE *ldptr;
+static SCNHDR texthead, rdatahead, datahead, sdatahead, sbsshead, bsshead;
+
+static char filename[1000] = "a.out";	/* default a.out file */
+static char self[256];			/* name of invoking program */
+
+char mem[MEMSIZE];		/* main memory. use malloc later */
+int TRACE, Traptrace, Regtrace;
+int NROWS=64, ASSOC=1, LINESIZE=4, RAND=0, LRD=0;
+int pc;
+
+extern char *strcpy();
+
+main(argc, argv)
+int argc;
+char *argv[];
+{
+	register char *s;
+	char *fakeargv[3];
+
+	strcpy(self, argv[0]);
+	while  ( argc > 1  &&  argv[1][0] == '-' )
+	{
+		--argc; ++argv;
+		for  ( s=argv[0]+1; *s != '\0'; ++s )
+			switch  ( *s )
+			{
+			}
+	}
+
+	if (argc >= 2)
+		strcpy(filename, argv[1]);
+	fp = fopen(filename, "r");
+	if (fp == NULL)
+	{
+		fprintf(stderr, "%s: Could not open '%s'\n", self, filename);
+		exit(0);
+	}
+	fclose(fp);
+	load_program(filename);
+	if  ( argv[1] == NULL )
+	{
+		fakeargv[1] = "a.out";
+		fakeargv[2] = NULL;
+		argv = fakeargv;
+		++argc;
+	}
+	disasm(memoffset, argc-1, argv+1); /* where things normally start */
+}
+
+#define LOADSECTION(head) load_section(&head);
+
+load_section(hd)
+register SCNHDR *hd;
+{
+  register int pc, i;
+  if  ( hd->s_scnptr != 0 ) {
+    /* printf("loading %s\n", hd->s_name); */
+    pc = hd->s_vaddr;
+    FSEEK(ldptr, hd->s_scnptr, 0);
+    for  ( i=0; i<hd->s_size; ++i ) {
+      if (pc-memoffset >= MEMSIZE)
+	{ printf("MEMSIZE too small. Fix and recompile.\n");
+	  exit(1); }
+      *(char *) ((mem-memoffset)+pc++) = getc(fp);
+    }
+  }
+}
+
+load_program(filename)
+char *filename;
+{
+	ldptr = ldopen(filename, NULL);
+	if  ( ldptr == NULL )
+	{
+		fprintf(stderr, "%s: Load read error on %s\n", self, filename);
+		exit(0);
+	}
+	if  ( TYPE(ldptr) != 0x162 )
+	{
+		fprintf(stderr,
+			"big-endian object file (little-endian interp)\n");
+		exit(0);
+	}
+
+        if  ( ldnshread(ldptr, ".text", &texthead) != 1 )
+                printf("text section header missing\n");
+        else
+                LOADSECTION(texthead)
+
+        if  ( ldnshread(ldptr, ".rdata", &rdatahead) != 1 )
+                printf("rdata section header missing\n");
+        else
+                LOADSECTION(rdatahead)
+
+        if  ( ldnshread(ldptr, ".data", &datahead) != 1 )
+                printf("data section header missing\n");
+        else
+                LOADSECTION(datahead)
+
+        if  ( ldnshread(ldptr, ".sdata", &sdatahead) != 1 )
+                printf("sdata section header missing\n");
+        else
+                LOADSECTION(sdatahead)
+
+        if  ( ldnshread(ldptr, ".sbss", &sbsshead) != 1 )
+                printf("sbss section header missing\n");
+        else
+                LOADSECTION(sbsshead)
+
+        if  ( ldnshread(ldptr, ".bss", &bsshead) != 1 )
+                printf("bss section header missing\n");
+        else
+                LOADSECTION(bsshead)
+
+
+	/* BSS is already zeroed (statically-allocated mem) */
+	/* this version ignores relocation info */
+}
+
+
+int *m_alloc(n)
+int n;
+{
+	extern char *malloc();
+
+	return (int *) (int) malloc((unsigned) n);
+}
+
+disasm(startpc, argc, argv)
+int startpc, argc;
+char *argv[];
+{
+	int i;
+
+	pc = memoffset;
+	for  ( i=0; i<texthead.s_size; i += 4 ) 
+	{
+		dis1(pc);
+		pc = pc + 4;
+	}
+}
+
+dis1(xpc)
+int xpc;
+{
+	register int instr;
+
+	instr = fetch(pc);
+	dump_ascii(instr, pc);
+	printf("\n");
+}
+
+