get info registers

xxx/Makefile

@@ -0,0 +1,17 @@
+TARGET = xxx
+
+all: clean $(TARGET)
+
+$(TARGET):
+	smlrcc main.c regs.c -I./include -o $(TARGET)
+
+debug:
+	gdb ./xxx \
+		-ex "target remote localhost:1234" \
+		-ex "set architecture i80386" \
+		-ex "set disassembly-flavor intel" \
+		-ex "layout asm" -ex "layout regs" \
+		-ex "break *0x80490b0"
+
+clean:
+	rm -f $(TARGET)

xxx/include/types.h

@@ -0,0 +1,11 @@
+/**
+ * common data types
+ */
+
+typedef int32_t i32;
+typedef int16_t i16;
+typedef int8_t i8;
+
+typedef uint32_t u32;
+typedef uint16_t u16;
+typedef uint8_t u8;

xxx/main.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+void printRegs() {
+        printf("eax=%08x\tesp=%08x\n", eax(), esp());
+        printf("ebx=%08x\tebp=%08x\n", ebx(), ebp());
+}
+
+int main() {
+        printf("xxx v0.0.1\n");
+
+        printRegs();
+
+        return 0;
+}

xxx/regs.c

@@ -0,0 +1,46 @@
+/**
+ * get register info
+ */
+
+#include <stdint.h>
+#include "types.h"
+
+/* 32bit registers */
+
+i32 eax() {
+        /* by calling convention */
+}
+
+i32 ebx() {
+        asm("mov eax, ebx");
+}
+
+i32 ecx() {
+        asm("mov eax, ecx");
+}
+
+i32 edx() {
+        asm("mov eax, edx");
+}
+
+i32 eip() {
+        asm("__geteip: mov eax, [esp]\n"
+            "          ret\n"
+            "call __geteip");
+}
+
+i32 esp() {
+        asm("mov eax, esp");
+}
+
+i32 ebp() {
+        asm("mov eax, ebp");
+}
+
+i32 esi() {
+        asm("mov eax, esi");
+}
+
+i32 edi() {
+        asm("mov eax, edi");
+}