section splitting complete for uc_mem_protect
This commit is contained in:
parent
0a60fa4c8a
commit
394461b941
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@ -97,6 +97,8 @@ endif
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ifneq (,$(findstring x86,$(UNICORN_ARCHS)))
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SOURCES += sample_x86.c
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SOURCES += shellcode.c
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SOURCES += mem_unmap.c
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SOURCES += mem_protect.c
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endif
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ifneq (,$(findstring m68k,$(UNICORN_ARCHS)))
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SOURCES += sample_m68k.c
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@ -111,7 +113,7 @@ all: $(BINARY)
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clean:
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rm -rf *.o $(OBJS_ELF) $(BINARY) $(SAMPLEDIR)/*.exe $(SAMPLEDIR)/*.static $(OBJDIR)/lib$(LIBNAME)* $(OBJDIR)/$(LIBNAME)*
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rm -rf libunicorn*.so libunicorn*.lib libunicorn*.dylib unicorn*.dll unicorn*.lib
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rm -rf sample_x86 sample_arm sample_arm64 sample_mips sample_sparc sample_ppc sample_m68k shellcode
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rm -rf sample_x86 sample_arm sample_arm64 sample_mips sample_sparc sample_ppc sample_m68k shellcode mem_unmap mem_protect
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$(BINARY): $(OBJS)
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@ -0,0 +1,323 @@
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/*
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uc_mem_protect demo / unit test
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Copyright(c) 2015 Chris Eagle
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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version 2 as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#define __STDC_FORMAT_MACROS
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#include <inttypes.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unicorn/unicorn.h>
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unsigned char PROGRAM[] =
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"\xc7\x05\x00\x00\x20\x00\x41\x41\x41\x41\x90\xc7\x05\x00\x00\x20"
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"\x00\x42\x42\x42\x42\xc7\x05\x00\x00\x30\x00\x43\x43\x43\x43\x90"
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"\xc7\x05\x00\x00\x30\x00\x44\x44\x44\x44\xc7\x05\x00\x00\x40\x00"
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"\x45\x45\x45\x45\x90\xc7\x05\x00\x00\x40\x00\x46\x46\x46\x46\xc7"
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"\x05\x00\xf8\x3f\x00\x47\x47\x47\x47\xc7\x05\x00\x18\x40\x00\x48"
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"\x48\x48\x48\xf4";
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// total size: 84 bytes
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/*
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bits 32
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; assumes code section at 0x100000
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; assumes data section at 0x200000, initially rw
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; assumes data section at 0x300000, initially rw
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; assumes data section at 0x400000, initially rw
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; with installed hooks unmaps or maps on each nop
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mov dword [0x200000], 0x41414141
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nop ; mark it RO
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mov dword [0x200000], 0x42424242
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mov dword [0x300000], 0x43434343
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nop ; mark it RO
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mov dword [0x300000], 0x44444444
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mov dword [0x400000], 0x45454545
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nop ; mark it RO
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mov dword [0x400000], 0x46464646
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mov dword [0x3ff800], 0x47474747 ; make sure surrounding areas remained RW
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mov dword [0x401800], 0x48484848 ; make sure surrounding areas remained RW
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hlt ; tell hook function we are done
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*/
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int test_num = 0;
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uint32_t tests[] = {
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0x41414141,
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0x43434343,
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0x45454545
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};
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static int log_num = 1;
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#define CODE_SECTION 0x100000
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#define CODE_SIZE 0x1000
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// callback for tracing instruction
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static void hook_code(uch handle, uint64_t addr, uint32_t size, void *user_data)
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{
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uint8_t opcode;
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uint32_t testval;
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if (uc_mem_read(handle, addr, &opcode, 1) != UC_ERR_OK) {
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printf("not ok %d - uc_mem_read fail during hook_code callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
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}
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printf("ok %d - uc_mem_read for opcode at address 0x%" PRIx64 "\n", log_num++, addr);
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switch (opcode) {
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case 0x90: //nop
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printf("# Handling NOP\n");
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if (uc_mem_read(handle, 0x200000 + test_num * 0x100000, (uint8_t*)&testval, sizeof(testval)) != UC_ERR_OK) {
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printf("not ok %d - uc_mem_read fail for address: 0x%x\n", log_num++, 0x200000 + test_num * 0x100000);
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}
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else {
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printf("ok %d - good uc_mem_read for address: 0x%x\n", log_num++, 0x200000 + test_num * 0x100000);
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printf("# uc_mem_read for test %d\n", test_num);
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if (testval == tests[test_num]) {
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printf("ok %d - passed test %d\n", log_num++, test_num);
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}
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else {
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printf("not ok %d - failed test %d\n", log_num++, test_num);
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printf("# Expected: 0x%x\n",tests[test_num]);
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printf("# Received: 0x%x\n", testval);
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}
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}
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if (uc_mem_protect(handle, 0x200000 + test_num * 0x100000, 0x1000, UC_PROT_READ) != UC_ERR_OK) {
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printf("not ok %d - uc_mem_protect fail during hook_code callback, addr: 0x%x\n", log_num++, 0x200000 + test_num * 0x100000);
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}
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else {
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printf("ok %d - uc_mem_protect success\n", log_num++);
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}
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test_num++;
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break;
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case 0xf4: //hlt
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printf("# Handling HLT\n");
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if (uc_emu_stop(handle) != UC_ERR_OK) {
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printf("not ok %d - uc_emu_stop fail during hook_code callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
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_exit(1);
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}
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else {
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printf("ok %d - hlt encountered, uc_emu_stop called\n", log_num++);
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}
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break;
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default: //all others
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printf("# Handling OTHER\n");
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break;
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}
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}
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// callback for tracing memory access (READ or WRITE)
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static void hook_mem_write(uch handle, uc_mem_type type,
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uint64_t addr, int size, int64_t value, void *user_data)
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{
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printf("# write to memory at 0x%"PRIx64 ", data size = %u, data value = 0x%"PRIx64 "\n", addr, size, value);
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}
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// callback for tracing invalid memory access (READ or WRITE)
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static bool hook_mem_invalid(uch handle, uc_mem_type type,
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uint64_t addr, int size, int64_t value, void *user_data)
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{
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uint32_t testval;
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switch(type) {
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default:
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printf("not ok %d - UC_HOOK_MEM_INVALID type: %d at 0x%" PRIx64 "\n", log_num++, type, addr);
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return false;
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case UC_MEM_WRITE_NW:
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printf("# write to non-writeable memory at 0x%"PRIx64 ", data size = %u, data value = 0x%"PRIx64 "\n", addr, size, value);
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if (uc_mem_read(handle, addr, (uint8_t*)&testval, sizeof(testval)) != UC_ERR_OK) {
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printf("not ok %d - uc_mem_read fail for address: 0x%" PRIx64 "\n", log_num++, addr);
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}
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else {
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printf("ok %d - uc_mem_read success after mem_protect at test %d\n", log_num++, test_num - 1);
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}
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if (uc_mem_protect(handle, addr & ~0xfff, 0x1000, UC_PROT_READ | UC_PROT_WRITE) != UC_ERR_OK) {
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printf("not ok %d - uc_mem_protect fail during hook_mem_invalid callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
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}
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else {
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printf("ok %d - uc_mem_protect success\n", log_num++);
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}
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return 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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uch handle, trace1, trace2;
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uc_err err;
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uint32_t addr, testval;
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int32_t buf1[1024], buf2[1024], readbuf[1024];
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int i;
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//don't really care about quality of randomness
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srand(time(NULL));
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for (i = 0; i < 1024; i++) {
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buf1[i] = rand();
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buf2[i] = rand();
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}
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printf("# Memory protect test\n");
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// Initialize emulator in X86-32bit mode
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err = uc_open(UC_ARCH_X86, UC_MODE_32, &handle);
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if (err) {
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printf("not ok %d - Failed on uc_open() with error returned: %u\n", log_num++, err);
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return 1;
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}
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else {
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printf("ok %d - uc_open() success\n", log_num++);
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}
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uc_mem_map(handle, CODE_SECTION, CODE_SIZE, UC_PROT_READ | UC_PROT_EXEC);
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uc_mem_map(handle, 0x200000, 0x1000, UC_PROT_READ | UC_PROT_WRITE);
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uc_mem_map(handle, 0x300000, 0x1000, UC_PROT_READ | UC_PROT_WRITE);
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uc_mem_map(handle, 0x3ff000, 0x3000, UC_PROT_READ | UC_PROT_WRITE);
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// fill in sections that shouldn't get touched
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if (uc_mem_write(handle, 0x3ff000, (uint8_t*)buf1, 4096)) {
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printf("not ok %d - Failed to write random buffer 1 to memory, quit!\n", log_num++);
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return 2;
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}
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else {
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printf("ok %d - Random buffer 1 written to memory\n", log_num++);
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}
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if (uc_mem_write(handle, 0x401000, (uint8_t*)buf2, 4096)) {
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printf("not ok %d - Failed to write random buffer 2 to memory, quit!\n", log_num++);
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return 2;
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}
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else {
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printf("ok %d - Random buffer 2 written to memory\n", log_num++);
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}
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// write machine code to be emulated to memory
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if (uc_mem_write(handle, CODE_SECTION, PROGRAM, sizeof(PROGRAM))) {
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printf("not ok %d - Failed to write emulation code to memory, quit!\n", log_num++);
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return 2;
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}
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else {
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printf("ok %d - Program written to memory\n", log_num++);
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}
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if (uc_hook_add(handle, &trace2, UC_HOOK_CODE, hook_code, NULL, 1, 0) != UC_ERR_OK) {
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printf("not ok %d - Failed to install UC_HOOK_CODE handler\n", log_num++);
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return 3;
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}
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else {
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printf("ok %d - UC_HOOK_CODE installed\n", log_num++);
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}
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// intercept memory write events
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if (uc_hook_add(handle, &trace1, UC_HOOK_MEM_WRITE, hook_mem_write, NULL) != UC_ERR_OK) {
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printf("not ok %d - Failed to install UC_HOOK_MEM_WRITE handler\n", log_num++);
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return 4;
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}
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else {
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printf("ok %d - UC_HOOK_MEM_WRITE installed\n", log_num++);
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}
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// intercept invalid memory events
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if (uc_hook_add(handle, &trace1, UC_HOOK_MEM_INVALID, hook_mem_invalid, NULL) != UC_ERR_OK) {
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printf("not ok %d - Failed to install UC_HOOK_MEM_INVALID handler\n", log_num++);
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return 4;
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}
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else {
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printf("ok %d - UC_HOOK_MEM_INVALID installed\n", log_num++);
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}
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// emulate machine code until told to stop by hook_code
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printf("# BEGIN execution\n");
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err = uc_emu_start(handle, CODE_SECTION, CODE_SECTION + CODE_SIZE, 0, 100);
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if (err != UC_ERR_OK) {
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printf("not ok %d - Failure on uc_emu_start() with error %u:%s\n", log_num++, err, uc_strerror(err));
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return 5;
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}
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else {
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printf("ok %d - uc_emu_start complete\n", log_num++);
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}
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printf("# END execution\n");
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//read from the remapped memory
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testval = 0x42424242;
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for (addr = 0x200000; addr <= 0x400000; addr += 0x100000) {
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uint32_t val;
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if (uc_mem_read(handle, addr, (uint8_t*)&val, sizeof(val)) != UC_ERR_OK) {
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printf("not ok %d - Failed uc_mem_read for address 0x%x\n", log_num++, addr);
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}
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else {
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printf("ok %d - Good uc_mem_read from 0x%x\n", log_num++, addr);
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}
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if (val != testval) {
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printf("not ok %d - Read 0x%x, expected 0x%x\n", log_num++, val, testval);
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}
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else {
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printf("ok %d - Correct value retrieved\n", log_num++);
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}
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testval += 0x02020202;
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}
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//account for the two mods made by the machine code
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buf1[512] = 0x47474747;
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buf2[512] = 0x48484848;
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//make sure that random blocks didn't get nuked
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// fill in sections that shouldn't get touched
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if (uc_mem_read(handle, 0x3ff000, (uint8_t*)readbuf, 4096)) {
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printf("not ok %d - Failed to read random buffer 1 from memory\n", log_num++);
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}
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else {
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printf("ok %d - Random buffer 1 read from memory\n", log_num++);
|
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if (memcmp(buf1, readbuf, 4096)) {
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printf("not ok %d - Random buffer 1 contents are incorrect\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 1 contents are correct\n", log_num++);
|
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}
|
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}
|
||||
|
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if (uc_mem_read(handle, 0x401000, (uint8_t*)readbuf, 4096)) {
|
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printf("not ok %d - Failed to read random buffer 2 from memory\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 2 read from memory\n", log_num++);
|
||||
if (memcmp(buf2, readbuf, 4096)) {
|
||||
printf("not ok %d - Random buffer 2 contents are incorrect\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 2 contents are correct\n", log_num++);
|
||||
}
|
||||
}
|
||||
|
||||
if (uc_close(&handle) == UC_ERR_OK) {
|
||||
printf("ok %d - uc_close complete\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("not ok %d - uc_close complete\n", log_num++);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
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@ -0,0 +1,313 @@
|
|||
/*
|
||||
|
||||
uc_mem_unmap demo / unit test
|
||||
|
||||
Copyright(c) 2015 Chris Eagle
|
||||
|
||||
This program is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU General Public License
|
||||
version 2 as published by the Free Software Foundation.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
|
||||
*/
|
||||
|
||||
#define __STDC_FORMAT_MACROS
|
||||
#include <inttypes.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
|
||||
#include <unicorn/unicorn.h>
|
||||
|
||||
unsigned char PROGRAM[] =
|
||||
"\xc7\x05\x00\x00\x20\x00\x41\x41\x41\x41\x90\xc7\x05\x00\x00\x20"
|
||||
"\x00\x42\x42\x42\x42\xc7\x05\x00\x00\x30\x00\x43\x43\x43\x43\x90"
|
||||
"\xc7\x05\x00\x00\x30\x00\x44\x44\x44\x44\xc7\x05\x00\x00\x40\x00"
|
||||
"\x45\x45\x45\x45\x90\xc7\x05\x00\x00\x40\x00\x46\x46\x46\x46\xf4";
|
||||
// total size: 64 bytes
|
||||
|
||||
/*
|
||||
; assumes code section at 0x100000
|
||||
; assumes data section at 0x200000, initially rw
|
||||
; assumes data section at 0x300000, initially rw
|
||||
; assumes data section at 0x400000, initially rw
|
||||
|
||||
; with installed hooks unmaps or maps on each nop
|
||||
|
||||
mov dword [0x200000], 0x41414141
|
||||
nop ; unmap it
|
||||
mov dword [0x200000], 0x42424242
|
||||
|
||||
mov dword [0x300000], 0x43434343
|
||||
nop ; unmap it
|
||||
mov dword [0x300000], 0x44444444
|
||||
|
||||
mov dword [0x400000], 0x45454545
|
||||
nop ; unmap it
|
||||
mov dword [0x400000], 0x46464646
|
||||
|
||||
hlt ; tell hook function we are done
|
||||
*/
|
||||
|
||||
int test_num = 0;
|
||||
uint32_t tests[] = {
|
||||
0x41414141,
|
||||
0x43434343,
|
||||
0x45454545
|
||||
};
|
||||
|
||||
static int log_num = 1;
|
||||
|
||||
#define CODE_SECTION 0x100000
|
||||
#define CODE_SIZE 0x1000
|
||||
|
||||
// callback for tracing instruction
|
||||
static void hook_code(uch handle, uint64_t addr, uint32_t size, void *user_data)
|
||||
{
|
||||
uint8_t opcode;
|
||||
uint32_t testval;
|
||||
if (uc_mem_read(handle, addr, &opcode, 1) != UC_ERR_OK) {
|
||||
printf("not ok %d - uc_mem_read fail during hook_code callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
|
||||
}
|
||||
printf("ok %d - uc_mem_read for opcode at address 0x%" PRIx64 "\n", log_num++, addr);
|
||||
switch (opcode) {
|
||||
case 0x90: //nop
|
||||
printf("# Handling NOP\n");
|
||||
if (uc_mem_read(handle, 0x200000 + test_num * 0x100000, (uint8_t*)&testval, sizeof(testval)) != UC_ERR_OK) {
|
||||
printf("not ok %d - uc_mem_read fail for address: 0x%x\n", log_num++, 0x200000 + test_num * 0x100000);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - good uc_mem_read for address: 0x%x\n", log_num++, 0x200000 + test_num * 0x100000);
|
||||
printf("# uc_mem_read for test %d\n", test_num);
|
||||
|
||||
if (testval == tests[test_num]) {
|
||||
printf("ok %d - passed test %d\n", log_num++, test_num);
|
||||
}
|
||||
else {
|
||||
printf("not ok %d - failed test %d\n", log_num++, test_num);
|
||||
printf("# Expected: 0x%x\n",tests[test_num]);
|
||||
printf("# Received: 0x%x\n", testval);
|
||||
}
|
||||
}
|
||||
if (uc_mem_unmap(handle, 0x200000 + test_num * 0x100000, 0x1000) != UC_ERR_OK) {
|
||||
printf("not ok %d - uc_mem_unmap fail during hook_code callback, addr: 0x%x\n", log_num++, 0x200000 + test_num * 0x100000);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - uc_mem_unmap success\n", log_num++);
|
||||
}
|
||||
test_num++;
|
||||
break;
|
||||
case 0xf4: //hlt
|
||||
printf("# Handling HLT\n");
|
||||
if (uc_emu_stop(handle) != UC_ERR_OK) {
|
||||
printf("not ok %d - uc_emu_stop fail during hook_code callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
|
||||
_exit(1);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - hlt encountered, uc_emu_stop called\n", log_num++);
|
||||
}
|
||||
break;
|
||||
default: //all others
|
||||
printf("# Handling OTHER\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// callback for tracing memory access (READ or WRITE)
|
||||
static void hook_mem_write(uch handle, uc_mem_type type,
|
||||
uint64_t addr, int size, int64_t value, void *user_data)
|
||||
{
|
||||
printf("# write to memory at 0x%"PRIx64 ", data size = %u, data value = 0x%"PRIx64 "\n", addr, size, value);
|
||||
}
|
||||
|
||||
// callback for tracing invalid memory access (READ or WRITE)
|
||||
static bool hook_mem_invalid(uch handle, uc_mem_type type,
|
||||
uint64_t addr, int size, int64_t value, void *user_data)
|
||||
{
|
||||
uint32_t testval;
|
||||
switch(type) {
|
||||
default:
|
||||
printf("not ok %d - UC_HOOK_MEM_INVALID type: %d at 0x%" PRIx64 "\n", log_num++, type, addr);
|
||||
return false;
|
||||
case UC_MEM_WRITE:
|
||||
printf("# write to invalid memory at 0x%"PRIx64 ", data size = %u, data value = 0x%"PRIx64 "\n", addr, size, value);
|
||||
|
||||
if (uc_mem_read(handle, addr, (uint8_t*)&testval, sizeof(testval)) != UC_ERR_OK) {
|
||||
printf("ok %d - uc_mem_read fail for address: 0x%" PRIx64 "\n", log_num++, addr);
|
||||
}
|
||||
else {
|
||||
printf("not ok %d - uc_mem_read success after unmap at test %d\n", log_num++, test_num - 1);
|
||||
}
|
||||
|
||||
if (uc_mem_map(handle, addr & ~0xfff, 0x1000, UC_PROT_READ | UC_PROT_WRITE) != UC_ERR_OK) {
|
||||
printf("not ok %d - uc_mem_map fail during hook_mem_invalid callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - uc_mem_map success\n", log_num++);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char **argv, char **envp)
|
||||
{
|
||||
uch handle, trace1, trace2;
|
||||
uc_err err;
|
||||
uint32_t addr, testval;
|
||||
int32_t buf1[1024], buf2[1024], readbuf[1024];
|
||||
int i;
|
||||
|
||||
//don't really care about quality of randomness
|
||||
srand(time(NULL));
|
||||
for (i = 0; i < 1024; i++) {
|
||||
buf1[i] = rand();
|
||||
buf2[i] = rand();
|
||||
}
|
||||
|
||||
printf("# Memory unmapping test\n");
|
||||
|
||||
// Initialize emulator in X86-32bit mode
|
||||
err = uc_open(UC_ARCH_X86, UC_MODE_32, &handle);
|
||||
if (err) {
|
||||
printf("not ok %d - Failed on uc_open() with error returned: %u\n", log_num++, err);
|
||||
return 1;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - uc_open() success\n", log_num++);
|
||||
}
|
||||
|
||||
uc_mem_map(handle, CODE_SECTION, CODE_SIZE, UC_PROT_READ | UC_PROT_EXEC);
|
||||
uc_mem_map(handle, 0x200000, 0x1000, UC_PROT_READ | UC_PROT_WRITE);
|
||||
uc_mem_map(handle, 0x300000, 0x1000, UC_PROT_READ | UC_PROT_WRITE);
|
||||
uc_mem_map(handle, 0x3ff000, 0x3000, UC_PROT_READ | UC_PROT_WRITE);
|
||||
|
||||
// fill in sections that shouldn't get touched
|
||||
if (uc_mem_write(handle, 0x3ff000, (uint8_t*)buf1, 4096)) {
|
||||
printf("not ok %d - Failed to write random buffer 1 to memory, quit!\n", log_num++);
|
||||
return 2;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 1 written to memory\n", log_num++);
|
||||
}
|
||||
|
||||
if (uc_mem_write(handle, 0x401000, (uint8_t*)buf2, 4096)) {
|
||||
printf("not ok %d - Failed to write random buffer 2 to memory, quit!\n", log_num++);
|
||||
return 2;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 2 written to memory\n", log_num++);
|
||||
}
|
||||
|
||||
// write machine code to be emulated to memory
|
||||
if (uc_mem_write(handle, CODE_SECTION, PROGRAM, sizeof(PROGRAM))) {
|
||||
printf("not ok %d - Failed to write emulation code to memory, quit!\n", log_num++);
|
||||
return 2;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Program written to memory\n", log_num++);
|
||||
}
|
||||
|
||||
if (uc_hook_add(handle, &trace2, UC_HOOK_CODE, hook_code, NULL, 1, 0) != UC_ERR_OK) {
|
||||
printf("not ok %d - Failed to install UC_HOOK_CODE handler\n", log_num++);
|
||||
return 3;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - UC_HOOK_CODE installed\n", log_num++);
|
||||
}
|
||||
|
||||
// intercept memory write events
|
||||
if (uc_hook_add(handle, &trace1, UC_HOOK_MEM_WRITE, hook_mem_write, NULL) != UC_ERR_OK) {
|
||||
printf("not ok %d - Failed to install UC_HOOK_MEM_WRITE handler\n", log_num++);
|
||||
return 4;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - UC_HOOK_MEM_WRITE installed\n", log_num++);
|
||||
}
|
||||
|
||||
// intercept invalid memory events
|
||||
if (uc_hook_add(handle, &trace1, UC_HOOK_MEM_INVALID, hook_mem_invalid, NULL) != UC_ERR_OK) {
|
||||
printf("not ok %d - Failed to install UC_HOOK_MEM_INVALID handler\n", log_num++);
|
||||
return 4;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - UC_HOOK_MEM_INVALID installed\n", log_num++);
|
||||
}
|
||||
|
||||
// emulate machine code until told to stop by hook_code
|
||||
printf("# BEGIN execution\n");
|
||||
err = uc_emu_start(handle, CODE_SECTION, CODE_SECTION + CODE_SIZE, 0, 100);
|
||||
if (err != UC_ERR_OK) {
|
||||
printf("not ok %d - Failure on uc_emu_start() with error %u:%s\n", log_num++, err, uc_strerror(err));
|
||||
return 5;
|
||||
}
|
||||
else {
|
||||
printf("ok %d - uc_emu_start complete\n", log_num++);
|
||||
}
|
||||
printf("# END execution\n");
|
||||
|
||||
//read from the remapped memory
|
||||
testval = 0x42424242;
|
||||
for (addr = 0x200000; addr <= 0x400000; addr += 0x100000) {
|
||||
uint32_t val;
|
||||
if (uc_mem_read(handle, addr, (uint8_t*)&val, sizeof(val)) != UC_ERR_OK) {
|
||||
printf("not ok %d - Failed uc_mem_read for address 0x%x\n", log_num++, addr);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Good uc_mem_read from 0x%x\n", log_num++, addr);
|
||||
}
|
||||
if (val != testval) {
|
||||
printf("not ok %d - Read 0x%x, expected 0x%x\n", log_num++, val, testval);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Correct value retrieved\n", log_num++);
|
||||
}
|
||||
testval += 0x02020202;
|
||||
}
|
||||
|
||||
//make sure that random blocks didn't get nuked
|
||||
// fill in sections that shouldn't get touched
|
||||
if (uc_mem_read(handle, 0x3ff000, (uint8_t*)readbuf, 4096)) {
|
||||
printf("not ok %d - Failed to read random buffer 1 from memory\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 1 read from memory\n", log_num++);
|
||||
if (memcmp(buf1, readbuf, 4096)) {
|
||||
printf("not ok %d - Random buffer 1 contents are incorrect\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 1 contents are correct\n", log_num++);
|
||||
}
|
||||
}
|
||||
|
||||
if (uc_mem_read(handle, 0x401000, (uint8_t*)readbuf, 4096)) {
|
||||
printf("not ok %d - Failed to read random buffer 2 from memory\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 2 read from memory\n", log_num++);
|
||||
if (memcmp(buf2, readbuf, 4096)) {
|
||||
printf("not ok %d - Random buffer 2 contents are incorrect\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("ok %d - Random buffer 2 contents are correct\n", log_num++);
|
||||
}
|
||||
}
|
||||
|
||||
if (uc_close(&handle) == UC_ERR_OK) {
|
||||
printf("ok %d - uc_close complete\n", log_num++);
|
||||
}
|
||||
else {
|
||||
printf("not ok %d - uc_close complete\n", log_num++);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
71
uc.c
71
uc.c
|
@ -638,7 +638,7 @@ uc_err uc_mem_map(uch handle, uint64_t address, size_t size, uint32_t perms)
|
|||
return UC_ERR_MAP;
|
||||
|
||||
// check for only valid permissions
|
||||
if ((perms & ~(UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC)) != 0)
|
||||
if ((perms & ~UC_PROT_ALL) != 0)
|
||||
return UC_ERR_MAP;
|
||||
|
||||
if ((uc->mapped_block_count & (MEM_BLOCK_INCR - 1)) == 0) { //time to grow
|
||||
|
@ -782,7 +782,7 @@ uc_err uc_mem_protect(uch handle, uint64_t address, size_t size, uint32_t perms)
|
|||
return UC_ERR_MAP;
|
||||
|
||||
// check for only valid permissions
|
||||
if ((perms & ~(UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC)) != 0)
|
||||
if ((perms & ~UC_PROT_ALL) != 0)
|
||||
return UC_ERR_MAP;
|
||||
|
||||
//check that user's entire requested block is mapped
|
||||
|
@ -790,50 +790,32 @@ uc_err uc_mem_protect(uch handle, uint64_t address, size_t size, uint32_t perms)
|
|||
return UC_ERR_MAP;
|
||||
|
||||
//Now we know entire region is mapped, so change permissions
|
||||
//check trivial case first
|
||||
//If request exactly matches a region we don't need to split
|
||||
mr = memory_mapping(uc, address);
|
||||
if (address == mr->addr && size == int128_get64(mr->size)) {
|
||||
//regions exactly matches an existing region just change perms
|
||||
mr->perms = perms;
|
||||
uc->readonly_mem(mr, (perms & UC_PROT_WRITE) == 0);
|
||||
}
|
||||
else {
|
||||
if (address != mr->addr || size != int128_get64(mr->size)) {
|
||||
//ouch, we are going to need to subdivide blocks
|
||||
/*
|
||||
address = start;
|
||||
size = block_size;
|
||||
while (size > 0) {
|
||||
MemoryRegion *mr = memory_mapping(uc, address);
|
||||
uint64_t region_size = int128_get64(mr->size);
|
||||
if (address > mr->addr) {
|
||||
//in case start address is not aligned with start of region
|
||||
region_size -= address - mr->addr;
|
||||
//TODO Learn how to split regions
|
||||
//In this case some proper subset of the region is having it's permissions changed
|
||||
//need to split region and add new portions into uc->mapped_blocks list
|
||||
//In this case, there is a portion of the region with original perms: mr->addr..start
|
||||
//and a portion getting new perms: start..start+block_size
|
||||
|
||||
//split the block and stay in the loop
|
||||
}
|
||||
if (size < int128_get64(mr->size)) {
|
||||
//TODO Learn how to split regions
|
||||
//In this case some proper subset of the region is having it's permissions changed
|
||||
//need to split region and add new portions into uc->mapped_blocks list
|
||||
//In this case, there is a portion of the region with new perms: start..start+block_size
|
||||
//and a portion getting new perms: mr->addr+size..mr->addr+mr->size
|
||||
|
||||
//split the block and break
|
||||
break;
|
||||
}
|
||||
size -= int128_get64(mr->size);
|
||||
address += int128_get64(mr->size);
|
||||
mr->perms = perms;
|
||||
uc->readonly_mem(mr, (perms & UC_PROT_WRITE) == 0);
|
||||
uint64_t addr = address;
|
||||
size_t count = 0, len;
|
||||
while(count < size) {
|
||||
MemoryRegion *mr = memory_mapping(uc, addr);
|
||||
len = MIN(size - count, mr->end - addr);
|
||||
if (!split_region(handle, mr, addr, len, false))
|
||||
return UC_ERR_MAP;
|
||||
count += len;
|
||||
addr += len;
|
||||
}
|
||||
*/
|
||||
}
|
||||
return UC_ERR_OK;
|
||||
//Grab a pointer to the newly split MemoryRegion
|
||||
mr = memory_mapping(uc, address);
|
||||
if (mr == NULL) {
|
||||
//this should never happern if splitting succeeded
|
||||
return UC_ERR_MAP;
|
||||
}
|
||||
}
|
||||
//regions exactly matches an existing region just change perms
|
||||
mr->perms = perms;
|
||||
uc->readonly_mem(mr, (perms & UC_PROT_WRITE) == 0);
|
||||
|
||||
return UC_ERR_OK;
|
||||
}
|
||||
|
||||
UNICORN_EXPORT
|
||||
|
@ -842,7 +824,6 @@ uc_err uc_mem_unmap(uch handle, uint64_t address, size_t size)
|
|||
MemoryRegion *mr;
|
||||
unsigned int i;
|
||||
struct uc_struct* uc = (struct uc_struct *)handle;
|
||||
size_t count, len;
|
||||
|
||||
if (handle == 0)
|
||||
// invalid handle
|
||||
|
@ -882,7 +863,7 @@ uc_err uc_mem_unmap(uch handle, uint64_t address, size_t size)
|
|||
}
|
||||
else {
|
||||
//ouch, we are going to need to subdivide blocks
|
||||
count = 0;
|
||||
size_t count = 0, len;
|
||||
while(count < size) {
|
||||
MemoryRegion *mr = memory_mapping(uc, address);
|
||||
len = MIN(size - count, mr->end - address);
|
||||
|
|
Loading…
Reference in New Issue