better debug support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@18 c046a42c-6fe2-441c-8c8c-71466251a162

Makefile

@@ -34,13 +34,10 @@ DEFINES+=-D_GNU_SOURCE
 DEFINES+=-DCONFIG_PREFIX=\"/usr/local\"
 LDSCRIPT=$(ARCH).ld
 LIBS+=-ldl -lm
+VERSION=0.1
 
-#DEFINES+= -DGEMU -DDOSEMU -DNO_TRACE_MSGS
-#OBJS= i386/fp87.o i386/interp_main.o i386/interp_modrm.o i386/interp_16_32.o \
-#      i386/interp_32_16.o i386/interp_32_32.o i386/emu-utils.o \
-#      i386/dis8086.o i386/emu-ldt.o
+OBJS= elfload.o main.o thunk.o syscall.o
 OBJS+=translate-i386.o op-i386.o
-OBJS+= elfload.o main.o thunk.o syscall.o
 # NOTE: the disassembler code is only needed for debugging
 OBJS+=i386-dis.o dis-buf.o
 SRCS = $(OBJS:.o=.c)
@@ -53,15 +50,6 @@ gemu: $(OBJS)
 depend: $(SRCS)
 	$(CC) -MM $(CFLAGS) $^ 1>.depend
 
-# old i386 emulator
-i386/interp_32_32.o: i386/interp_32_32.c i386/interp_gen.h
-
-i386/interp_gen.h: i386/gencode
-	./i386/gencode > $@
-
-i386/gencode: i386/gencode.c
-	$(CC) -O2 -Wall -g $< -o $@
-
 # new i386 emulator
 dyngen: dyngen.c
 	$(HOST_CC) -O2 -Wall -g $< -o $@
@@ -78,7 +66,7 @@ op-i386.o: op-i386.c opreg_template.h ops_template.h
 	$(CC) $(CFLAGS) $(DEFINES) -c -o $@ $<
 
 clean:
-	rm -f *.o *~ i386/*.o i386/*~ gemu TAGS
+	rm -f *.o *~ gemu dyngen TAGS
 
 # various test targets
 test speed: gemu
@@ -87,6 +75,26 @@ test speed: gemu
 TAGS: 
 	etags *.[ch] i386/*.[ch]
 
+FILES= \
+COPYING.LIB  dyngen.c    ioctls.h          ops_template.h  syscall_types.h\
+Makefile     elf.h       linux_bin.h       segment.h       thunk.c\
+TODO         elfload.c   main.c            signal.c        thunk.h\
+cpu-i386.h   gemu.h      op-i386.c         syscall-i386.h  translate-i386.c\
+dis-asm.h    gen-i386.h  op-i386.h         syscall.c\
+dis-buf.c    i386-dis.c  opreg_template.h  syscall_defs.h\
+i386.ld ppc.ld\
+tests/test-i386.c tests/test-i386-shift.h tests/test-i386.h\
+tests/test2.c tests/hello.c tests/sha1.c tests/test1.c
+
+FILE=gemu-$(VERSION)
+
+tar:
+	rm -rf /tmp/$(FILE)
+	mkdir -p /tmp/$(FILE)
+	cp -P $(FILES) /tmp/$(FILE)
+	( cd /tmp ; tar zcvf ~/$(FILE).tar.gz $(FILE) )
+	rm -rf /tmp/$(FILE)
+
 ifneq ($(wildcard .depend),)
 include .depend
 endif

linux-user/main.c

@@ -27,6 +27,11 @@
 
 #include "cpu-i386.h"
 
+#define DEBUG_LOGFILE "/tmp/gemu.log"
+
+FILE *logfile = NULL;
+int loglevel;
+
 unsigned long x86_stack_size;
 unsigned long stktop;
 
@@ -83,7 +88,7 @@ int cpu_x86_inl(int addr)
 void usage(void)
 {
     printf("gemu version 0.1, Copyright (c) 2003 Fabrice Bellard\n"
-           "usage: gemu program [arguments...]\n"
+           "usage: gemu [-d] program [arguments...]\n"
            "Linux x86 emulator\n"
            );
     exit(1);
@@ -95,11 +100,27 @@ int main(int argc, char **argv)
     struct target_pt_regs regs1, *regs = &regs1;
     struct image_info info1, *info = &info1;
     CPUX86State *env;
+    int optind;
 
     if (argc <= 1)
         usage();
+    loglevel = 0;
+    optind = 1;
+    if (argv[optind] && !strcmp(argv[optind], "-d")) {
+        loglevel = 1;
+        optind++;
+    }
+    filename = argv[optind];
 
-    filename = argv[1];
+    /* init debug */
+    if (loglevel) {
+        logfile = fopen(DEBUG_LOGFILE, "w");
+        if (!logfile) {
+            perror(DEBUG_LOGFILE);
+            exit(1);
+        }
+        setvbuf(logfile, NULL, _IOLBF, 0);
+    }
 
     /* Zero out regs */
     memset(regs, 0, sizeof(struct target_pt_regs));

op-i386.c

+#define DEBUG_EXEC
+
 typedef unsigned char uint8_t;
 typedef unsigned short uint16_t;
 typedef unsigned int uint32_t;
@@ -10,6 +12,11 @@ typedef signed long long int64_t;
 
 #define NULL 0
 
+typedef struct FILE FILE;
+extern FILE *logfile;
+extern int loglevel;
+extern int fprintf(FILE *, const char *, ...);
+
 #ifdef __i386__
 register int T0 asm("esi");
 register int T1 asm("ebx");
@@ -1636,6 +1643,32 @@ void OPPROTO op_fcos(void)
 /* main execution loop */
 uint8_t code_gen_buffer[65536];
 
+#ifdef DEBUG_EXEC
+static const char *cc_op_str[] = {
+    "DYNAMIC",
+    "EFLAGS",
+    "MUL",
+    "ADDB",
+    "ADDW",
+    "ADDL",
+    "SUBB",
+    "SUBW",
+    "SUBL",
+    "LOGICB",
+    "LOGICW",
+    "LOGICL",
+    "INCB",
+    "INCW",
+    "INCL",
+    "DECB",
+    "DECW",
+    "DECL",
+    "SHLB",
+    "SHLW",
+    "SHLL",
+};
+#endif
+
 int cpu_x86_exec(CPUX86State *env1)
 {
     int saved_T0, saved_T1, saved_A0;
@@ -1653,6 +1686,17 @@ int cpu_x86_exec(CPUX86State *env1)
     /* prepare setjmp context for exception handling */
     if (setjmp(env->jmp_env) == 0) {
         for(;;) {
+#ifdef DEBUG_EXEC
+            if (loglevel) {
+                fprintf(logfile, 
+                        "EAX=%08x EBX=%08X ECX=%08x EDX=%08x\n"
+                        "ESI=%08x ESI=%08X EBP=%08x ESP=%08x\n"
+                        "CCS=%08x CCD=%08x CCOP=%s\n",
+                        env->regs[R_EAX], env->regs[R_EBX], env->regs[R_ECX], env->regs[R_EDX], 
+                        env->regs[R_ESI], env->regs[R_EDI], env->regs[R_EBP], env->regs[R_ESP], 
+                        env->cc_src, env->cc_dst, cc_op_str[env->cc_op]);
+            }
+#endif
             cpu_x86_gen_code(code_gen_buffer, &code_gen_size, (uint8_t *)env->pc);
             /* execute the generated code */
             gen_func = (void *)code_gen_buffer;

translate-i386.c

@@ -5,23 +5,21 @@
 #include <inttypes.h>
 #include <assert.h>
 
-/* dump all code */
 #define DEBUG_DISAS
-#define DEBUG_LOGFILE "/tmp/gemu.log"
 
+#define IN_OP_I386
+#include "cpu-i386.h"
+
+/* dump all code */
 #ifdef DEBUG_DISAS
 #include "dis-asm.h"
 #endif
 
-#define IN_OP_I386
-#include "cpu-i386.h"
-
 static uint8_t *gen_code_ptr;
 int __op_param1, __op_param2, __op_param3;
 
-#ifdef DEBUG_DISAS
-static FILE *logfile = NULL;
-#endif
+extern FILE *logfile;
+extern int loglevel;
 
 /* supress that */
 static void error(const char *fmt, ...)
@@ -716,9 +714,6 @@ static void gen_lea_modrm(DisasContext *s, int modrm, int *reg_ptr, int *offset_
     int reg1, reg2, opreg;
     int mod, rm, code;
 
-#ifdef DEBUG_DISAS
-    fprintf(logfile, "modrm=0x%x\n", modrm);
-#endif
     mod = (modrm >> 6) & 3;
     rm = modrm & 7;
 
@@ -731,9 +726,6 @@ static void gen_lea_modrm(DisasContext *s, int modrm, int *reg_ptr, int *offset_
         if (base == 4) {
             havesib = 1;
             code = ldub(s->pc++);
-#ifdef DEBUG_DISAS
-            fprintf(logfile, "sib=0x%x\n", code);
-#endif
             scale = (code >> 6) & 3;
             index = (code >> 3) & 7;
             base = code & 7;
@@ -988,11 +980,6 @@ long disas_insn(DisasContext *s, uint8_t *pc_start, int *is_jmp_ptr)
     //    cur_pc = s->pc; /* for insn generation */
  next_byte:
     b = ldub(s->pc);
-#ifdef DEBUG_DISAS
-    fprintf(logfile, "ib=0x%02x\n", b);
-#endif
-    if (b < 0)
-        return -1;
     s->pc++;
     /* check prefixes */
     switch (b) {
@@ -2247,15 +2234,7 @@ int cpu_x86_gen_code(uint8_t *gen_code_buf, int *gen_code_size_ptr,
     gen_start();
 
 #ifdef DEBUG_DISAS
-    if (!logfile) {
-        logfile = fopen(DEBUG_LOGFILE, "w");
-        if (!logfile) {
-            perror(DEBUG_LOGFILE);
-            exit(1);
-        }
-        setvbuf(logfile, NULL, _IOLBF, 0);
-    }
-
+    if (loglevel) {
         INIT_DISASSEMBLE_INFO(disasm_info, logfile, fprintf);
         disasm_info.buffer = pc_start;
         disasm_info.buffer_vma = (unsigned long)pc_start;
@@ -2274,6 +2253,7 @@ int cpu_x86_gen_code(uint8_t *gen_code_buf, int *gen_code_size_ptr,
         fprintf(logfile, "0x%08lx:  ", (long)pc_start);
         print_insn_i386((unsigned long)pc_start, &disasm_info);
         fprintf(logfile, "\n\n");
+    }
 #endif
     is_jmp = 0;
     ret = disas_insn(dc, pc_start, &is_jmp);
@@ -2290,7 +2270,7 @@ int cpu_x86_gen_code(uint8_t *gen_code_buf, int *gen_code_size_ptr,
     *gen_code_size_ptr = gen_code_ptr - gen_code_buf;
 
 #ifdef DEBUG_DISAS
-    {
+    if (loglevel) {
         uint8_t *pc;
         int count;