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add test case in C demonstrating issue 351

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This commit is contained in:
Willi Ballenthin 2016-01-11 09:57:13 -05:00
parent b2b1d0be01
commit a9d4b4cfa7
1 changed files with 146 additions and 0 deletions
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146
tests/regress/emu_clear_errors.c Normal file
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#include <sys/types.h>
#include <stdint.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <unicorn/unicorn.h>
static int count = 1;
bool cb_hookunmapped(uc_engine *uc, uc_mem_type type, uint64_t address, uint32_t size, int64_t value, void *user_data) {
uint32_t pc = 0;
uc_reg_read(uc, UC_X86_REG_EIP, &pc);
fprintf(stderr, "mem unmapped: 0x%x type: %x address: 0x%"PRIx64" length: %x value: %x\n",
pc, type, address, size, value);
uc_err err = UC_ERR_OK;
err = uc_emu_stop(uc);
if (err != UC_ERR_OK) {
fprintf(stderr, "stop not ok");
exit(0);
}
return true;
}
char *CODE = "\x8B\x74\x01\x28" // move esi, dword ptr [ecx + eax + 0x28]
"\x0C\xF0" // add esi, eax
"\x8D\x45\xFC" // lea eax, dword ptr [ebp - 4]
"\x50" // push eax
"\x6A\x40" // push 0x40
"\x6A\x10" // push 0x10
"\x56" // push esi
"\xFF\x15\x20\x20\x00\x10"; // call some address
int main() {
uc_engine *uc;
uc_err err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_open\n", count++);
err = uc_mem_map(uc, 0x1000, 0x1000, UC_PROT_ALL);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_mem_map: code\n", count++);
uint8_t code[0x1000];
memset(code, 0x0, sizeof(code));
memcpy(code, CODE, sizeof(CODE));
err = uc_mem_write(uc, 0x1000, code, sizeof(code));
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_mem_write: code\n", count++);
uint32_t eip = 0x1000;
err = uc_reg_write(uc, UC_X86_REG_EIP, &eip);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_reg_write: eip\n", count++);
err = uc_mem_map(uc, 0x4000, 0x4000, UC_PROT_ALL);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_mem_map: stack\n", count++);
uint8_t stack[0x4000];
memset(stack, 0x0, sizeof(stack));
err = uc_mem_write(uc, 0x4000, code, sizeof(code));
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_mem_write: stack\n", count++);
uint32_t esp = 0x6000;
err = uc_reg_write(uc, UC_X86_REG_ESP, &esp);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_reg_write: esp\n", count++);
uint32_t ebp = 0x6000;
err = uc_reg_write(uc, UC_X86_REG_EBP, &ebp);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_reg_write: ebp\n", count++);
uc_hook h1;
err = uc_hook_add(uc, &h1, UC_HOOK_MEM_UNMAPPED, cb_hookunmapped, NULL);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_hook_add\n", count++);
// this should execute only a single instruction at 0x1000, because
// that instruction accesses invalid memory.
err = uc_emu_start(uc, 0x1000, 0x100F, 0, 0);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_emu_start\n", count++);
// yes, not necessary, but to demonstrate the UC API is working as expected
eip = 0x1004;
err = uc_reg_write(uc, UC_X86_REG_EIP, &eip);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_reg_write: eip\n", count++);
// this should execute the remaining instructions up to (but not includign) 0x100F.
// currently, it returns an error about an unmapped read.
// seems that this error should have been returned in the previous call
// to emu_start.
err = uc_emu_start(uc, 0x1004, 0x100F, 0, 0);
if (err != UC_ERR_OK) {
fprintf(stderr, "not ok %d - %s\n", count++, uc_strerror(err));
exit(0);
}
fprintf(stderr, "ok %d - uc_emu_start\n", count++);
fprintf(stderr, "ok %d - Done", count++);
return 0;
}