Merge pull request #329 from xorstream/emu_stop_in_hook_overrun

Emu stop in hook overrun

.gitignore

@@ -122,6 +122,7 @@ sparc_jump_to_zero
 mem_nofree
 mips_delay_slot_code_hook
 threaded_emu_start
+emu_stop_in_hook_overrun
 
 test_mem_map_ptr
 test_mem_high

tests/regress/Makefile

@@ -32,6 +32,7 @@ TESTS += mips_delay_slot_code_hook
 TESTS += mem_nofree
 TESTS += rw_hookstack
 TESTS += threaded_emu_start
+TESTS += emu_stop_in_hook_overrun
 
 all: $(TESTS)
 

tests/regress/emu_stop_in_hook_overrun.c

@@ -0,0 +1,133 @@
+/*
+Test for uc_emu_stop() in code hook not always stopping the emu at the current instruction.
+(Sometimes it will execute and stop at the next instruction).
+*/
+
+// windows specific
+#ifdef _MSC_VER
+#include <io.h>
+#include <windows.h>
+#include <process.h>
+#define PRIx64 "llX"
+#ifdef DYNLOAD
+#include <unicorn_dynload.h>
+#else // DYNLOAD
+#include <unicorn/unicorn.h>
+#ifdef _WIN64
+#pragma comment(lib, "unicorn_staload64.lib")
+#else // _WIN64
+#pragma comment(lib, "unicorn_staload.lib")
+#endif // _WIN64
+#endif // DYNLOAD
+
+// posix specific
+#else // _MSC_VER
+#include <unistd.h>
+#include <inttypes.h>
+#include <unicorn/unicorn.h>
+#include "pthread.h"
+#endif // _MSC_VER
+
+// common includes
+#include <string.h>
+
+
+// Test MIPS little endian code.
+// This should loop forever.
+const uint64_t addr = 0x100000;
+const unsigned char test_code[] = {
+	0x00,0x00,0x00,0x00,	// 100000:	nop
+	0x00,0x00,0x00,0x00,	// 100004:	nop
+	0x00,0x00,0x00,0x00,	// 100008:	nop
+	0x00,0x00,0x00,0x00,	// 10000C:	nop
+};
+bool test_passed_ok = false;
+
+
+// This hook is used to show that code is executing in the emulator.
+static void mips_codehook(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
+{
+	printf("Executing: %llX\n", address);
+	if( address == 0x100008 )
+	{
+		printf("Stopping at: %llX\n", address);
+		uc_emu_stop(uc);
+	}
+}
+
+
+int main(int argc, char **argv, char **envp)
+{
+    uc_engine *uc;
+    uc_err err;
+	int ret;
+	uc_hook hhc;
+	uint32_t val;
+
+	// dynamically load shared library
+#ifdef DYNLOAD
+	uc_dyn_load(NULL, 0);
+#endif
+
+	// Initialize emulator in MIPS 32bit little endian mode
+    printf("uc_open()\n");
+	err = uc_open(UC_ARCH_MIPS, UC_MODE_MIPS32, &uc);
+    if (err)
+	{
+        printf("Failed on uc_open() with error returned: %u\n", err);
+        return err;
+    }
+
+	// map in a page of mem
+	printf("uc_mem_map()\n");
+	err = uc_mem_map(uc, addr, 0x1000, UC_PROT_ALL);
+    if (err)
+	{
+        printf("Failed on uc_mem_map() with error returned: %u\n", err);
+        return err;
+    }
+
+	// write machine code to be emulated to memory
+	printf("uc_mem_write()\n");
+    err = uc_mem_write(uc, addr, test_code, sizeof(test_code));
+	if( err )
+	{
+        printf("Failed on uc_mem_write() with error returned: %u\n", err);
+        return err;
+    }
+	
+    // hook all instructions by having @begin > @end
+	printf("uc_hook_add()\n");
+    uc_hook_add(uc, &hhc, UC_HOOK_CODE, mips_codehook, NULL, (uint64_t)1, (uint64_t)0);
+	if( err )
+	{
+        printf("Failed on uc_hook_add(code) with error returned: %u\n", err);
+        return err;
+    }
+	
+	// start executing code
+	printf("uc_emu_start()\n");
+	uc_emu_start(uc, addr, addr+sizeof(test_code), 0, 0);
+
+
+	// done executing, print some reg values as a test
+	uc_reg_read(uc, UC_MIPS_REG_PC, &val);	printf("pc is %X\n", val);
+	test_passed_ok = val == 0x100008;
+	
+	// free resources
+	printf("uc_close()\n");
+	uc_close(uc);
+	
+	if( test_passed_ok )
+		printf("\n\nTEST PASSED!\n\n");
+	else
+		printf("\n\nTEST FAILED!\n\n");
+
+	// dynamically free shared library
+#ifdef DYNLOAD
+    uc_dyn_free();
+#endif
+
+	return 0;
+}
+