mirror of
https://github.com/yuzu-emu/unicorn.git
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111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/*
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Non-readable memory test case
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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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#include <inttypes.h>
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#include <string.h>
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#include <unistd.h>
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#include <unicorn/unicorn.h>
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const uint8_t PROGRAM[] =
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"\x8b\x1d\x00\x00\x30\x00\xa1\x00\x00\x40\x00";
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// total size: 11 bytes
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/*
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bits 32
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mov ebx, [0x300000]
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mov eax, [0x400000]
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*/
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// callback for tracing memory access (READ or WRITE)
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static bool hook_mem_invalid(uc_engine *uc, uc_mem_type type,
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uint64_t address, int size, int64_t value, void *user_data)
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{
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switch(type) {
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default:
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// return false to indicate we want to stop emulation
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return false;
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case UC_MEM_READ_PROT:
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printf(">>> non-readable memory is being read at 0x%"PRIx64 ", data size = %u\n",
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address, size);
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return false;
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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_hook trace1, trace2;
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uc_err err;
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uint32_t eax, ebx;
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printf("Memory protections 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, &uc);
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if (err) {
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printf("Failed on uc_open() with error returned: %u\n", err);
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return 1;
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}
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uc_mem_map(uc, 0x100000, 0x1000, UC_PROT_READ);
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uc_mem_map(uc, 0x300000, 0x1000, UC_PROT_READ | UC_PROT_WRITE);
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uc_mem_map(uc, 0x400000, 0x1000, UC_PROT_WRITE);
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// write machine code to be emulated to memory
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if (uc_mem_write(uc, 0x100000, PROGRAM, sizeof(PROGRAM))) {
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printf("Failed to write emulation code to memory, quit!\n");
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return 2;
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} else {
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printf("Allowed to write to read only memory via uc_mem_write\n");
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}
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uc_mem_write(uc, 0x300000, (const uint8_t*)"\x41\x41\x41\x41", 4);
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uc_mem_write(uc, 0x400000, (const uint8_t*)"\x42\x42\x42\x42", 4);
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//uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, 0x400000, 0x400fff);
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// intercept invalid memory events
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uc_hook_add(uc, &trace1, UC_MEM_READ_PROT, hook_mem_invalid, NULL, 1, 0);
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// emulate machine code in infinite time
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printf("BEGIN execution\n");
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err = uc_emu_start(uc, 0x100000, 0x100000 + sizeof(PROGRAM), 0, 2);
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if (err) {
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printf("Expected failure on uc_emu_start() with error returned %u: %s\n",
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err, uc_strerror(err));
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} else {
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printf("UNEXPECTED uc_emu_start returned UC_ERR_OK\n");
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}
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printf("END execution\n");
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uc_reg_read(uc, UC_X86_REG_EAX, &eax);
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printf("Final eax = 0x%x\n", eax);
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uc_reg_read(uc, UC_X86_REG_EBX, &ebx);
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printf("Final ebx = 0x%x\n", ebx);
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uc_close(uc);
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return 0;
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}
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