Added test for MIPS branch likely instructions.
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@ -123,6 +123,7 @@ mem_nofree
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mips_delay_slot_code_hook
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threaded_emu_start
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emu_stop_in_hook_overrun
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mips_branch_likely_issue
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test_mem_map_ptr
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test_mem_high
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@ -33,6 +33,7 @@ TESTS += mem_nofree
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TESTS += rw_hookstack
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TESTS += threaded_emu_start
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TESTS += emu_stop_in_hook_overrun
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TESTS += mips_branch_likely_issue
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all: $(TESTS)
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164
tests/regress/mips_branch_likely_issue.c
Normal file
164
tests/regress/mips_branch_likely_issue.c
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@ -0,0 +1,164 @@
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/*
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Test for MIPS branch likely instructions only executing their delay slot instruction when the branch is taken.
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Currently it seems to always execute the delay slot instruction like a normal non-"likely" style branch.
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*/
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// windows specific
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#ifdef _MSC_VER
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#include <io.h>
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#include <windows.h>
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#include <process.h>
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#define PRIx64 "llX"
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#ifdef DYNLOAD
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#include <unicorn_dynload.h>
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#else // DYNLOAD
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#include <unicorn/unicorn.h>
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#ifdef _WIN64
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#pragma comment(lib, "unicorn_staload64.lib")
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#else // _WIN64
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#pragma comment(lib, "unicorn_staload.lib")
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#endif // _WIN64
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#endif // DYNLOAD
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// posix specific
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#else // _MSC_VER
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#include <unistd.h>
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#include <inttypes.h>
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#include <unicorn/unicorn.h>
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#include "pthread.h"
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#endif // _MSC_VER
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// common includes
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#include <string.h>
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const uint64_t addr = 0x100000;
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// This code SHOULD execute the instruction at 0x10000C.
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const unsigned char test_code_1[] = {
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0x01,0x00,0x02,0x24, // 100000: li $v0, 1
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0x02,0x00,0x03,0x24, // 100004: li $v1, 2
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0x01,0x00,0x62,0x54, // 100008: bnel $v1, $v0, 0x100010
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0x00,0x00,0x00,0x00, // 10000C: nop
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};
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// This code SHOULD NOT execute the instruction at 0x10000C.
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const unsigned char test_code_2[] = {
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0x01,0x00,0x02,0x24, // 100000: li $v0, 1
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0x01,0x00,0x03,0x24, // 100004: li $v1, 1
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0x01,0x00,0x62,0x54, // 100008: bnel $v1, $v0, 0x100010
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0x00,0x00,0x00,0x00, // 10000C: nop
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};
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int test_num = 0;
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bool test1_delayslot_executed = false;
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bool test2_delayslot_executed = false;
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// This hook is used to show that code is executing in the emulator.
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static void mips_codehook(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
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{
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printf("Test %d Executing: %llX\n", test_num, address);
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if( test_num == 1 && address == 0x10000C )
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{
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printf("Delay slot executed!\n");
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test1_delayslot_executed = true;
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}
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if( test_num == 2 && address == 0x10000C )
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{
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printf("Delay slot executed!\n");
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test2_delayslot_executed = true;
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}
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}
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int main(int argc, char **argv, char **envp)
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{
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uc_engine *uc;
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uc_err err;
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uc_hook hhc;
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// dynamically load shared library
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#ifdef DYNLOAD
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uc_dyn_load(NULL, 0);
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#endif
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// Initialize emulator in MIPS 32bit little endian mode
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printf("uc_open()\n");
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err = uc_open(UC_ARCH_MIPS, UC_MODE_MIPS32, &uc);
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if (err)
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{
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printf("Failed on uc_open() with error returned: %u\n", err);
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return err;
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}
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// map in a page of mem
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printf("uc_mem_map()\n");
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err = uc_mem_map(uc, addr, 0x1000, UC_PROT_ALL);
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if (err)
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{
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printf("Failed on uc_mem_map() with error returned: %u\n", err);
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return err;
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}
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// hook all instructions by having @begin > @end
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printf("uc_hook_add()\n");
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uc_hook_add(uc, &hhc, UC_HOOK_CODE, mips_codehook, NULL, (uint64_t)1, (uint64_t)0);
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if( err )
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{
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printf("Failed on uc_hook_add(code) with error returned: %u\n", err);
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return err;
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}
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// write test1 code to be emulated to memory
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test_num = 1;
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printf("\nuc_mem_write(1)\n");
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err = uc_mem_write(uc, addr, test_code_1, sizeof(test_code_1));
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if( err )
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{
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printf("Failed on uc_mem_write() with error returned: %u\n", err);
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return err;
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}
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// start executing test code 1
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printf("uc_emu_start(1)\n");
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uc_emu_start(uc, addr, addr+sizeof(test_code_1), 0, 0);
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// write test2 code to be emulated to memory
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test_num = 2;
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printf("\nuc_mem_write(2)\n");
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err = uc_mem_write(uc, addr, test_code_2, sizeof(test_code_2));
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if( err )
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{
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printf("Failed on uc_mem_write() with error returned: %u\n", err);
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return err;
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}
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// start executing test code 2
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printf("uc_emu_start(2)\n");
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uc_emu_start(uc, addr, addr+sizeof(test_code_2), 0, 0);
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// free resources
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printf("\nuc_close()\n");
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uc_close(uc);
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// print test results
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// test 1 SHOULD execute the instruction at 0x10000C.
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if( test1_delayslot_executed == true )
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printf("\n\nTEST 1 PASSED!\n");
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else
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printf("\n\nTEST 1 FAILED!\n");
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// test 2 SHOULD NOT execute the instruction at 0x10000C.
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if( test2_delayslot_executed == false )
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printf("TEST 2 PASSED!\n\n");
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else
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printf("TEST 2 FAILED!\n\n");
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// dynamically free shared library
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#ifdef DYNLOAD
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uc_dyn_free();
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#endif
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return 0;
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}
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