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solve merging conflict

This commit is contained in:
Nguyen Anh Quynh 2015-09-03 18:05:21 +08:00
parent 46cc510dfe ad877e6af0
commit b8d4240240
25 changed files with 1343 additions and 76 deletions
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6
include/uc_priv.h
View File

@ -47,6 +47,8 @@ typedef void (*uc_args_uc_u64_t)(struct uc_struct *, uint64_t addr);
typedef MemoryRegion* (*uc_args_uc_ram_size_t)(struct uc_struct*, ram_addr_t begin, size_t size, uint32_t perms);
typedef void (*uc_mem_unmap_t)(struct uc_struct*, MemoryRegion *mr);
typedef void (*uc_readonly_mem_t)(MemoryRegion *mr, bool readonly);
// which interrupt should make emulation stop?
@ -90,6 +92,7 @@ struct uc_struct {
uc_args_tcg_enable_t tcg_enabled;
uc_args_uc_long_t tcg_exec_init;
uc_args_uc_ram_size_t memory_map;
uc_mem_unmap_t memory_unmap;
uc_readonly_mem_t readonly_mem;
// list of cpu
void* cpu;
@ -172,8 +175,9 @@ struct uc_struct {
bool block_full;
MemoryRegion **mapped_blocks;
uint32_t mapped_block_count;
void *qemu_thread_data; // to support cross compile to Windows (qemu-thread-win32.c)
uint32_t target_page_size;
uint32_t target_page_align;
};
#include "qemu_macro.h"

65
include/unicorn/unicorn.h
View File

@ -104,7 +104,7 @@ typedef enum uc_mode {
// These are values returned by uc_errno()
typedef enum uc_err {
UC_ERR_OK = 0, // No error: everything was fine
UC_ERR_OOM, // Out-Of-Memory error: uc_open(), uc_emulate()
UC_ERR_NOMEM, // Out-Of-Memory error: uc_open(), uc_emulate()
UC_ERR_ARCH, // Unsupported architecture: uc_open()
UC_ERR_HANDLE, // Invalid handle
UC_ERR_UCH, // Invalid handle (uch)
@ -116,8 +116,10 @@ typedef enum uc_err {
UC_ERR_HOOK, // Invalid hook type: uc_hook_add()
UC_ERR_INSN_INVALID, // Quit emulation due to invalid instruction: uc_emu_start()
UC_ERR_MAP, // Invalid memory mapping: uc_mem_map()
UC_ERR_MEM_WRITE_NW, // Quit emulation due to write to non-writable: uc_emu_start()
UC_ERR_MEM_READ_NR, // Quit emulation due to read from non-readable: uc_emu_start()
UC_ERR_WRITE_PROT, // Quit emulation due to UC_PROT_WRITE violation: uc_emu_start()
UC_ERR_READ_PROT, // Quit emulation due to UC_PROT_READ violation: uc_emu_start()
UC_ERR_EXEC_PROT, // Quit emulation due to UC_PROT_EXEC violation: uc_emu_start()
UC_ERR_INVAL, // Inavalid argument provided to uc_xxx function (See specific function API)
} uc_err;
@ -149,8 +151,9 @@ typedef enum uc_mem_type {
UC_MEM_READ = 16, // Memory is read from
UC_MEM_WRITE, // Memory is written to
UC_MEM_READ_WRITE, // Memory is accessed (either READ or WRITE)
UC_MEM_WRITE_NW, // write to non-writable
UC_MEM_READ_NR, // read from non-readable
UC_MEM_WRITE_PROT, // write to write protected memory
UC_MEM_READ_PROT, // read from read protected memory
UC_MEM_EXEC_PROT, // fetch from non-executable memory
} uc_mem_type;
// All type of hooks for uc_hook_add() API.
@ -392,27 +395,65 @@ typedef enum uc_prot {
UC_PROT_NONE = 0,
UC_PROT_READ = 1,
UC_PROT_WRITE = 2,
UC_PROT_ALL = 3,
UC_PROT_EXEC = 4,
UC_PROT_ALL = 7,
} uc_prot;
/*
Map memory in for emulation.
This API adds a memory region that can be used by emulation.
This API adds a memory region that can be used by emulation. The region is mapped
with permissions UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC.
@handle: handle returned by uc_open()
@address: starting address of the new memory region to be mapped in.
This address must be aligned to 4KB, or this will return with UC_ERR_MAP error.
This address must be aligned to 4KB, or this will return with UC_ERR_INVAL error.
@size: size of the new memory region to be mapped in.
This size must be multiple of 4KB, or this will return with UC_ERR_MAP error.
This size must be multiple of 4KB, or this will return with UC_ERR_INVAL error.
@perms: Permissions for the newly mapped region.
This must be some combination of UC_PROT_READ & UC_PROT_WRITE,
or this will return with UC_ERR_MAP error. See uc_prot type above.
This must be some combination of UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC,
or this will return with UC_ERR_INVAL error.
@return UC_ERR_OK on success, UC_ERR_NOMEM if no memory is available to satisfy the
request, or other value on failure (refer to uc_err enum for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_map(uch handle, uint64_t address, size_t size, uint32_t perms);
/*
Set memory permissions for emulation memory.
This API changes permissions on an existing memory region.
@handle: handle returned by uc_open()
@address: starting address of the memory region to be modified.
This address must be aligned to 4KB, or this will return with UC_ERR_INVAL error.
@size: size of the memory region to be modified.
This size must be multiple of 4KB, or this will return with UC_ERR_INVAL error.
@perms: New permissions for the mapped region.
This must be some combination of UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC,
or this will return with UC_ERR_INVAL error.
@return UC_ERR_OK on success, UC_ERR_HANDLE for an invalid handle, UC_ERR_INVAL
for invalid perms or unaligned address or size, UC_ERR_NOMEM if entire region
is not mapped.
*/
UNICORN_EXPORT
uc_err uc_mem_protect(uch handle, uint64_t address, size_t size, uint32_t perms);
/*
Unmap a region of emulation memory.
This API deletes a memory mapping from the emulation memory space.
@handle: handle returned by uc_open()
@address: starting address of the memory region to be unmapped.
This address must be aligned to 4KB, or this will return with UC_ERR_INVAL error.
@size: size of the memory region to be modified.
This size must be multiple of 4KB, or this will return with UC_ERR_INVAL error.
@return UC_ERR_OK on success, or other value on failure (refer to uc_err enum
for detailed error).
*/
UNICORN_EXPORT
uc_err uc_mem_map(uch handle, uint64_t address, size_t size, uint32_t perms);
uc_err uc_mem_unmap(uch handle, uint64_t address, size_t size);
#ifdef __cplusplus
}

1
qemu/aarch64.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_aarch64
#define tb_cleanup tb_cleanup_aarch64
#define memory_map memory_map_aarch64
#define memory_unmap memory_unmap_aarch64
#define memory_free memory_free_aarch64
#define helper_raise_exception helper_raise_exception_aarch64
#define tcg_enabled tcg_enabled_aarch64

1
qemu/arm.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_arm
#define tb_cleanup tb_cleanup_arm
#define memory_map memory_map_arm
#define memory_unmap memory_unmap_arm
#define memory_free memory_free_arm
#define helper_raise_exception helper_raise_exception_arm
#define tcg_enabled tcg_enabled_arm

5
qemu/cputlb.c
View File

@ -299,6 +299,11 @@ tb_page_addr_t get_page_addr_code(CPUArchState *env1, target_ulong addr)
if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code !=
(addr & TARGET_PAGE_MASK))) {
cpu_ldub_code(env1, addr);
//check for NX related error from softmmu
if (env1->invalid_error == UC_ERR_MEM_READ) {
env1->invalid_error = UC_ERR_CODE_INVALID;
return -1;
}
}
pd = env1->iotlb[mmu_idx][page_index] & ~TARGET_PAGE_MASK;
mr = iotlb_to_region(cpu->as, pd);

1
qemu/header_gen.py
View File

@ -13,6 +13,7 @@ symbols = (
'phys_mem_clean',
'tb_cleanup',
'memory_map',
'memory_unmap',
'memory_free',
'helper_raise_exception',
'tcg_enabled',

1
qemu/include/exec/memory.h
View File

@ -939,6 +939,7 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
void memory_register_types(struct uc_struct *uc);
MemoryRegion *memory_map(struct uc_struct *uc, ram_addr_t begin, size_t size, uint32_t perms);
void memory_unmap(struct uc_struct *uc, MemoryRegion *mr);
int memory_free(struct uc_struct *uc);
#endif

1
qemu/m68k.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_m68k
#define tb_cleanup tb_cleanup_m68k
#define memory_map memory_map_m68k
#define memory_unmap memory_unmap_m68k
#define memory_free memory_free_m68k
#define helper_raise_exception helper_raise_exception_m68k
#define tcg_enabled tcg_enabled_m68k

12
qemu/memory.c
View File

@ -45,6 +45,18 @@ MemoryRegion *memory_map(struct uc_struct *uc, ram_addr_t begin, size_t size, ui
return ram;
}
void memory_unmap(struct uc_struct *uc, MemoryRegion *mr)
{
target_ulong addr;
//make sure all pages associated with the MemoryRegion are flushed
for (addr = mr->addr; addr < mr->end; addr += uc->target_page_size) {
tlb_flush_page(uc->current_cpu, addr);
}
mr->enabled = false;
memory_region_del_subregion(get_system_memory(uc), mr);
g_free(mr);
}
int memory_free(struct uc_struct *uc)
{
int i;

1
qemu/mips.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_mips
#define tb_cleanup tb_cleanup_mips
#define memory_map memory_map_mips
#define memory_unmap memory_unmap_mips
#define memory_free memory_free_mips
#define helper_raise_exception helper_raise_exception_mips
#define tcg_enabled tcg_enabled_mips

1
qemu/mips64.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_mips64
#define tb_cleanup tb_cleanup_mips64
#define memory_map memory_map_mips64
#define memory_unmap memory_unmap_mips64
#define memory_free memory_free_mips64
#define helper_raise_exception helper_raise_exception_mips64
#define tcg_enabled tcg_enabled_mips64

1
qemu/mips64el.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_mips64el
#define tb_cleanup tb_cleanup_mips64el
#define memory_map memory_map_mips64el
#define memory_unmap memory_unmap_mips64el
#define memory_free memory_free_mips64el
#define helper_raise_exception helper_raise_exception_mips64el
#define tcg_enabled tcg_enabled_mips64el

1
qemu/mipsel.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_mipsel
#define tb_cleanup tb_cleanup_mipsel
#define memory_map memory_map_mipsel
#define memory_unmap memory_unmap_mipsel
#define memory_free memory_free_mipsel
#define helper_raise_exception helper_raise_exception_mipsel
#define tcg_enabled tcg_enabled_mipsel

1
qemu/powerpc.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_powerpc
#define tb_cleanup tb_cleanup_powerpc
#define memory_map memory_map_powerpc
#define memory_unmap memory_unmap_powerpc
#define memory_free memory_free_powerpc
#define helper_raise_exception helper_raise_exception_powerpc
#define tcg_enabled tcg_enabled_powerpc

96
qemu/softmmu_template.h
View File

@ -181,6 +181,24 @@ WORD_TYPE helper_le_ld_name(CPUArchState *env, target_ulong addr, int mmu_idx,
struct uc_struct *uc = env->uc;
MemoryRegion *mr = memory_mapping(uc, addr);
#if defined(SOFTMMU_CODE_ACCESS)
// Unicorn: callback on fetch from NX
if (mr != NULL && !(mr->perms & UC_PROT_EXEC)) { //non-executable
if (uc->hook_mem_idx != 0 && ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_EXEC_PROT, addr, DATA_SIZE, 0,
uc->hook_callbacks[uc->hook_mem_idx].user_data)) {
env->invalid_error = UC_ERR_OK;
}
else {
env->invalid_addr = addr;
env->invalid_error = UC_ERR_EXEC_PROT;
// printf("***** Invalid fetch (non-executable) at " TARGET_FMT_lx "\n", addr);
cpu_exit(uc->current_cpu);
return 0;
}
}
#endif
// Unicorn: callback on memory read
if (env->uc->hook_mem_read && READ_ACCESS_TYPE == MMU_DATA_LOAD) {
struct hook_struct *trace = hook_find((uch)env->uc, UC_HOOK_MEM_READ, addr);
@ -206,20 +224,16 @@ WORD_TYPE helper_le_ld_name(CPUArchState *env, target_ulong addr, int mmu_idx,
}
}
// Unicorn: callback on read only memory
// Unicorn: callback on non-readable memory
if (mr != NULL && !(mr->perms & UC_PROT_READ)) { //non-readable
bool result = false;
if (uc->hook_mem_idx) {
result = ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_READ_NR, addr, DATA_SIZE, 0,
uc->hook_callbacks[uc->hook_mem_idx].user_data);
}
if (result) {
if (uc->hook_mem_idx != 0 && ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_READ_PROT, addr, DATA_SIZE, 0,
uc->hook_callbacks[uc->hook_mem_idx].user_data)) {
env->invalid_error = UC_ERR_OK;
}
else {
env->invalid_addr = addr;
env->invalid_error = UC_ERR_MEM_READ_NR;
env->invalid_error = UC_ERR_READ_PROT;
// printf("***** Invalid memory read (non-readable) at " TARGET_FMT_lx "\n", addr);
cpu_exit(uc->current_cpu);
return 0;
@ -326,6 +340,24 @@ WORD_TYPE helper_be_ld_name(CPUArchState *env, target_ulong addr, int mmu_idx,
struct uc_struct *uc = env->uc;
MemoryRegion *mr = memory_mapping(uc, addr);
#if defined(SOFTMMU_CODE_ACCESS)
// Unicorn: callback on fetch from NX
if (mr != NULL && !(mr->perms & UC_PROT_EXEC)) { //non-executable
if (uc->hook_mem_idx != 0 && ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_EXEC_PROT, addr, DATA_SIZE, 0,
uc->hook_callbacks[uc->hook_mem_idx].user_data)) {
env->invalid_error = UC_ERR_OK;
}
else {
env->invalid_addr = addr;
env->invalid_error = UC_ERR_EXEC_PROT;
// printf("***** Invalid fetch (non-executable) at " TARGET_FMT_lx "\n", addr);
cpu_exit(uc->current_cpu);
return 0;
}
}
#endif
// Unicorn: callback on memory read
if (env->uc->hook_mem_read && READ_ACCESS_TYPE == MMU_DATA_LOAD) {
struct hook_struct *trace = hook_find((uch)env->uc, UC_HOOK_MEM_READ, addr);
@ -351,20 +383,16 @@ WORD_TYPE helper_be_ld_name(CPUArchState *env, target_ulong addr, int mmu_idx,
}
}
// Unicorn: callback on read only memory
// Unicorn: callback on non-readable memory
if (mr != NULL && !(mr->perms & UC_PROT_READ)) { //non-readable
bool result = false;
if (uc->hook_mem_idx) {
result = ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_READ_NR, addr, DATA_SIZE, 0,
uc->hook_callbacks[uc->hook_mem_idx].user_data);
}
if (result) {
if (uc->hook_mem_idx != 0 && ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_READ_PROT, addr, DATA_SIZE, 0,
uc->hook_callbacks[uc->hook_mem_idx].user_data)) {
env->invalid_error = UC_ERR_OK;
}
else {
env->invalid_addr = addr;
env->invalid_error = UC_ERR_MEM_READ_NR;
env->invalid_error = UC_ERR_READ_PROT;
// printf("***** Invalid memory read (non-readable) at " TARGET_FMT_lx "\n", addr);
cpu_exit(uc->current_cpu);
return 0;
@ -534,20 +562,16 @@ void helper_le_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
}
}
// Unicorn: callback on read only memory
if (mr != NULL && !(mr->perms & UC_PROT_WRITE)) { //read only memory
bool result = false;
if (uc->hook_mem_idx) {
result = ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_WRITE_NW, addr, DATA_SIZE, (int64_t)val,
uc->hook_callbacks[uc->hook_mem_idx].user_data);
}
if (result) {
// Unicorn: callback on non-writable memory
if (mr != NULL && !(mr->perms & UC_PROT_WRITE)) { //non-writable
if (uc->hook_mem_idx != 0 && ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_WRITE_PROT, addr, DATA_SIZE, (int64_t)val,
uc->hook_callbacks[uc->hook_mem_idx].user_data)) {
env->invalid_error = UC_ERR_OK;
}
else {
env->invalid_addr = addr;
env->invalid_error = UC_ERR_MEM_WRITE_NW;
env->invalid_error = UC_ERR_WRITE_PROT;
// printf("***** Invalid memory write (ro) at " TARGET_FMT_lx "\n", addr);
cpu_exit(uc->current_cpu);
return;
@ -672,20 +696,16 @@ void helper_be_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
}
}
// Unicorn: callback on read only memory
if (mr != NULL && !(mr->perms & UC_PROT_WRITE)) { //read only memory
bool result = false;
if (uc->hook_mem_idx) {
result = ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_WRITE_NW, addr, DATA_SIZE, (int64_t)val,
uc->hook_callbacks[uc->hook_mem_idx].user_data);
}
if (result) {
// Unicorn: callback on non-writable memory
if (mr != NULL && !(mr->perms & UC_PROT_WRITE)) { //non-writable
if (uc->hook_mem_idx != 0 && ((uc_cb_eventmem_t)uc->hook_callbacks[uc->hook_mem_idx].callback)(
(uch)uc, UC_MEM_WRITE_PROT, addr, DATA_SIZE, (int64_t)val,
uc->hook_callbacks[uc->hook_mem_idx].user_data)) {
env->invalid_error = UC_ERR_OK;
}
else {
env->invalid_addr = addr;
env->invalid_error = UC_ERR_MEM_WRITE_NW;
env->invalid_error = UC_ERR_WRITE_PROT;
// printf("***** Invalid memory write (ro) at " TARGET_FMT_lx "\n", addr);
cpu_exit(uc->current_cpu);
return;

1
qemu/sparc.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_sparc
#define tb_cleanup tb_cleanup_sparc
#define memory_map memory_map_sparc
#define memory_unmap memory_unmap_sparc
#define memory_free memory_free_sparc
#define helper_raise_exception helper_raise_exception_sparc
#define tcg_enabled tcg_enabled_sparc

1
qemu/sparc64.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_sparc64
#define tb_cleanup tb_cleanup_sparc64
#define memory_map memory_map_sparc64
#define memory_unmap memory_unmap_sparc64
#define memory_free memory_free_sparc64
#define helper_raise_exception helper_raise_exception_sparc64
#define tcg_enabled tcg_enabled_sparc64

4
qemu/unicorn_common.h
View File

@ -73,8 +73,12 @@ static inline void uc_common_init(struct uc_struct* uc)
uc->pause_all_vcpus = pause_all_vcpus;
uc->vm_start = vm_start;
uc->memory_map = memory_map;
uc->memory_unmap = memory_unmap;
uc->readonly_mem = memory_region_set_readonly;
uc->target_page_size = TARGET_PAGE_SIZE;
uc->target_page_align = TARGET_PAGE_SIZE - 1;
if (!uc->release)
uc->release = release_common;
}

1
qemu/x86_64.h
View File

@ -7,6 +7,7 @@
#define phys_mem_clean phys_mem_clean_x86_64
#define tb_cleanup tb_cleanup_x86_64
#define memory_map memory_map_x86_64
#define memory_unmap memory_unmap_x86_64
#define memory_free memory_free_x86_64
#define helper_raise_exception helper_raise_exception_x86_64
#define tcg_enabled tcg_enabled_x86_64

3
regress/ro_mem_test.c
View File

@ -156,8 +156,11 @@ int main(int argc, char **argv, char **envp)
// emulate machine code in infinite time
printf("BEGIN execution - 2\n");
//update eax to point to aligned memory (same as add eax,7 above)
uint32_t eax = 0x40002C;
uc_reg_write(handle, UC_X86_REG_EAX, &eax);
//resume execution at the mov dword [eax], 0x87654321
//to test an aligned write as well
err = uc_emu_start(handle, 0x400015, 0x400000 + sizeof(PROGRAM), 0, 2);
if (err) {
printf("Expected failure on uc_emu_start() with error returned %u: %s\n",

6
samples/Makefile
View File

@ -97,6 +97,9 @@ endif
ifneq (,$(findstring x86,$(UNICORN_ARCHS)))
SOURCES += sample_x86.c
SOURCES += shellcode.c
SOURCES += mem_unmap.c
SOURCES += mem_protect.c
SOURCES += mem_exec.c
endif
ifneq (,$(findstring m68k,$(UNICORN_ARCHS)))
SOURCES += sample_m68k.c
@ -111,7 +114,8 @@ all: $(BINARY)
clean:
rm -rf *.o $(OBJS_ELF) $(BINARY) $(SAMPLEDIR)/*.exe $(SAMPLEDIR)/*.static $(OBJDIR)/lib$(LIBNAME)* $(OBJDIR)/$(LIBNAME)*
rm -rf libunicorn*.so libunicorn*.lib libunicorn*.dylib unicorn*.dll unicorn*.lib
rm -rf sample_x86 sample_arm sample_arm64 sample_mips sample_sparc sample_ppc sample_m68k shellcode
rm -rf sample_x86 sample_arm sample_arm64 sample_mips sample_sparc sample_ppc sample_m68k \
shellcode mem_unmap mem_protect mem_exec
$(BINARY): $(OBJS)

296
samples/mem_exec.c Normal file
View File

@ -0,0 +1,296 @@
/*
Executable memory regions 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[] =
"\xeb\x45\x5e\x81\xe6\x00\xf0\xff\xff\x40\x40\x40\x40\x40\x40\x40"
"\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40"
"\x40\x40\x40\x40\x40\x40\x40\x89\xf7\x81\xc7\x00\x00\x10\x00\xb9"
"\x4c\x00\x00\x00\x81\xff\x00\x00\x40\x00\x75\x01\xf4\xf3\xa4\x81"
"\xe7\x00\xf0\xff\xff\xff\xe7\xe8\xb6\xff\xff\xff";
// total size: 76 bytes
/*
bits 32
; assumes r-x section at 0x100000
; assumes rw- section at 0x200000
; assumes r-- section at 0x300000
; also needs an initialized stack
start:
jmp bottom
top:
pop esi
and esi, ~0xfff
times 30 inc eax
mov edi, esi
add edi, 0x100000
mov ecx, end - start
rep movsb
and edi, ~0xfff
cmp edi, 0x400000
jnz next_block
hlt
next_block:
jmp edi
bottom:
call top
end:
*/
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;
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 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)
{
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_EXEC_PROT:
printf("# Fetch from non-executable memory at 0x%"PRIx64 "\n", addr);
//make page executable
if (uc_mem_protect(handle, addr & ~0xfffL, 0x1000, UC_PROT_READ | UC_PROT_EXEC) != UC_ERR_OK) {
printf("not ok %d - uc_mem_protect fail for address: 0x%" PRIx64 "\n", log_num++, addr);
}
else {
printf("ok %d - uc_mem_protect success at 0x%" PRIx64 "\n", log_num++, addr);
}
return true;
case UC_MEM_WRITE_PROT:
printf("# write to non-writeable memory at 0x%"PRIx64 ", data size = %u, data value = 0x%"PRIx64 "\n", addr, size, value);
if (uc_mem_protect(handle, addr & ~0xfffL, 0x1000, UC_PROT_READ | UC_PROT_WRITE) != UC_ERR_OK) {
printf("not ok %d - uc_mem_protect fail during hook_mem_invalid callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
}
else {
printf("ok %d - uc_mem_protect success\n", log_num++);
}
return true;
}
}
int main(int argc, char **argv, char **envp)
{
uch handle, trace1, trace2;
uc_err err;
uint32_t esp, eip;
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 protect 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, 0x100000, 0x1000, UC_PROT_READ | UC_PROT_EXEC);
uc_mem_map(handle, 0x1ff000, 0x2000, UC_PROT_READ | UC_PROT_WRITE);
uc_mem_map(handle, 0x300000, 0x2000, UC_PROT_READ);
uc_mem_map(handle, 0xf00000, 0x1000, UC_PROT_READ | UC_PROT_WRITE);
esp = 0xf00000 + 0x1000;
// Setup stack pointer
if (uc_reg_write(handle, UC_X86_REG_ESP, &esp)) {
printf("not ok %d - Failed to set esp. quit!\n", log_num++);
return 2;
}
else {
printf("ok %d - ESP set\n", log_num++);
}
// fill in sections that shouldn't get touched
if (uc_mem_write(handle, 0x1ff000, (uint8_t*)buf1, 4096)) {
printf("not ok %d - Failed to write random buffer 1 to memory, quit!\n", log_num++);
return 3;
}
else {
printf("ok %d - Random buffer 1 written to memory\n", log_num++);
}
if (uc_mem_write(handle, 0x301000, (uint8_t*)buf2, 4096)) {
printf("not ok %d - Failed to write random buffer 2 to memory, quit!\n", log_num++);
return 4;
}
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, 0x100000, PROGRAM, sizeof(PROGRAM))) {
printf("not ok %d - Failed to write emulation code to memory, quit!\n", log_num++);
return 5;
}
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 6;
}
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 7;
}
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 8;
}
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, 0x100000, 0x400000, 0, 0);
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 9;
}
else {
printf("ok %d - uc_emu_start complete\n", log_num++);
}
printf("# END execution\n");
// get ending EIP
if (uc_reg_read(handle, UC_X86_REG_EIP, &eip)) {
printf("not ok %d - Failed to read eip.\n", log_num++);
}
else {
printf("ok %d - Ending EIP 0x%x\n", log_num++, eip);
}
//make sure that random blocks didn't get nuked
// fill in sections that shouldn't get touched
if (uc_mem_read(handle, 0x1ff000, (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, 0x301000, (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;
}

323
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/*
uc_mem_protect 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\xc7"
"\x05\x00\xf8\x3f\x00\x47\x47\x47\x47\xc7\x05\x00\x18\x40\x00\x48"
"\x48\x48\x48\xf4";
// total size: 84 bytes
/*
bits 32
; 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 ; mark it RO
mov dword [0x200000], 0x42424242
mov dword [0x300000], 0x43434343
nop ; mark it RO
mov dword [0x300000], 0x44444444
mov dword [0x400000], 0x45454545
nop ; mark it RO
mov dword [0x400000], 0x46464646
mov dword [0x3ff800], 0x47474747 ; make sure surrounding areas remained RW
mov dword [0x401800], 0x48484848 ; make sure surrounding areas remained RW
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_protect(handle, 0x200000 + test_num * 0x100000, 0x1000, UC_PROT_READ) != UC_ERR_OK) {
printf("not ok %d - uc_mem_protect fail during hook_code callback, addr: 0x%x\n", log_num++, 0x200000 + test_num * 0x100000);
}
else {
printf("ok %d - uc_mem_protect 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_PROT:
printf("# write to non-writeable 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("not ok %d - uc_mem_read fail for address: 0x%" PRIx64 "\n", log_num++, addr);
}
else {
printf("ok %d - uc_mem_read success after mem_protect at test %d\n", log_num++, test_num - 1);
}
if (uc_mem_protect(handle, addr & ~0xfffL, 0x1000, UC_PROT_READ | UC_PROT_WRITE) != UC_ERR_OK) {
printf("not ok %d - uc_mem_protect fail during hook_mem_invalid callback, addr: 0x%" PRIx64 "\n", log_num++, addr);
}
else {
printf("ok %d - uc_mem_protect 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 protect 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 3;
}
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 4;
}
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 5;
}
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 6;
}
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 7;
}
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, 0);
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 8;
}
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;
}
//account for the two mods made by the machine code
buf1[512] = 0x47474747;
buf2[512] = 0x48484848;
//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;
}

313
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/*
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 & ~0xfffL, 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 3;
}
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 4;
}
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 5;
}
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 6;
}
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 7;
}
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, 0);
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 8;
}
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;
}

277
uc.c
View File

@ -31,6 +31,9 @@
#include "qemu/include/hw/boards.h"
static uint8_t *copy_region(uch uc, MemoryRegion *mr);
static bool split_region(uch handle, MemoryRegion *mr, uint64_t address, size_t size, bool do_delete);
UNICORN_EXPORT
unsigned int uc_version(unsigned int *major, unsigned int *minor)
{
@ -65,8 +68,8 @@ const char *uc_strerror(uc_err code)
return "Unknown error code";
case UC_ERR_OK:
return "OK (UC_ERR_OK)";
case UC_ERR_OOM:
return "Out of memory (UC_ERR_OOM)";
case UC_ERR_NOMEM:
return "No memory available or memory not present (UC_ERR_NOMEM)";
case UC_ERR_ARCH:
return "Invalid/unsupported architecture(UC_ERR_ARCH)";
case UC_ERR_HANDLE:
@ -89,10 +92,14 @@ const char *uc_strerror(uc_err code)
return "Invalid hook type (UC_ERR_HOOK)";
case UC_ERR_MAP:
return "Invalid memory mapping (UC_ERR_MAP)";
case UC_ERR_MEM_WRITE_NW:
return "Write to non-writable (UC_ERR_MEM_WRITE_NW)";
case UC_ERR_MEM_READ_NR:
return "Read from non-readable (UC_ERR_MEM_READ_NR)";
case UC_ERR_WRITE_PROT:
return "Write to write-protected memory (UC_ERR_WRITE_PROT)";
case UC_ERR_READ_PROT:
return "Read from non-readable memory (UC_ERR_READ_PROT)";
case UC_ERR_EXEC_PROT:
return "Fetch from non-executable memory (UC_ERR_EXEC_PROT)";
case UC_ERR_INVAL:
return "Invalid argumet (UC_ERR_INVAL)";
}
}
@ -138,7 +145,7 @@ uc_err uc_open(uc_arch arch, uc_mode mode, uch *handle)
uc = calloc(1, sizeof(*uc));
if (!uc) {
// memory insufficient
return UC_ERR_OOM;
return UC_ERR_NOMEM;
}
uc->errnum = UC_ERR_OK;
@ -585,7 +592,7 @@ static int _hook_code(uch handle, int type, uint64_t begin, uint64_t end,
i = hook_add(handle, type, begin, end, callback, user_data);
if (i == 0)
return UC_ERR_OOM; // FIXME
return UC_ERR_NOMEM; // FIXME
*h2 = i;
@ -601,7 +608,7 @@ static uc_err _hook_mem_access(uch handle, uc_hook_t type,
i = hook_add(handle, type, begin, end, callback, user_data);
if (i == 0)
return UC_ERR_OOM; // FIXME
return UC_ERR_NOMEM; // FIXME
*h2 = i;
@ -620,24 +627,24 @@ uc_err uc_mem_map(uch handle, uint64_t address, size_t size, uint32_t perms)
if (size == 0)
// invalid memory mapping
return UC_ERR_MAP;
return UC_ERR_INVAL;
// address must be aligned to 4KB
if ((address & (4*1024 - 1)) != 0)
return UC_ERR_MAP;
// address must be aligned to uc->target_page_size
if ((address & uc->target_page_align) != 0)
return UC_ERR_INVAL;
// size must be multiple of 4KB
if ((size & (4*1024 - 1)) != 0)
return UC_ERR_MAP;
// size must be multiple of uc->target_page_size
if ((size & uc->target_page_align) != 0)
return UC_ERR_INVAL;
// check for only valid permissions
if ((perms & ~(UC_PROT_READ | UC_PROT_WRITE)) != 0)
return UC_ERR_MAP;
if ((perms & ~UC_PROT_ALL) != 0)
return UC_ERR_INVAL;
if ((uc->mapped_block_count & (MEM_BLOCK_INCR - 1)) == 0) { //time to grow
regions = (MemoryRegion**)realloc(uc->mapped_blocks, sizeof(MemoryRegion*) * (uc->mapped_block_count + MEM_BLOCK_INCR));
if (regions == NULL) {
return UC_ERR_OOM;
return UC_ERR_NOMEM;
}
uc->mapped_blocks = regions;
}
@ -647,6 +654,228 @@ uc_err uc_mem_map(uch handle, uint64_t address, size_t size, uint32_t perms)
return UC_ERR_OK;
}
//create a backup copy of the indicated MemoryRegion
//generally used in prepartion for splitting a MemoryRegion
static uint8_t *copy_region(uch handle, MemoryRegion *mr)
{
uint8_t *block = (uint8_t *)malloc(int128_get64(mr->size));
if (block != NULL) {
uc_err err = uc_mem_read(handle, mr->addr, block, int128_get64(mr->size));
if (err != UC_ERR_OK) {
free(block);
block = NULL;
}
}
return block;
}
/*
Split the given MemoryRegion at the indicated address for the indicated size
this may result in the create of up to 3 spanning sections. If the delete
parameter is true, the no new section will be created to replace the indicate
range. This functions exists to support uc_mem_protect and uc_mem_unmap.
This is a static function and callers have already done some preliminary
parameter validation.
*/
//TODO: investigate whether qemu region manipulation functions already offer this capability
static bool split_region(uch handle, MemoryRegion *mr, uint64_t address, size_t size, bool do_delete)
{
uint8_t *backup;
uint32_t perms;
uint64_t begin, end, chunk_end;
size_t l_size, m_size, r_size;
chunk_end = address + size;
if (address <= mr->addr && chunk_end >= mr->end) {
//trivial case, if we are deleting, just unmap
if (do_delete)
return uc_mem_unmap(handle, mr->addr, int128_get64(mr->size)) == UC_ERR_OK;
return true;
}
if (size == 0)
//trivial case
return true;
if (address >= mr->end || chunk_end <= mr->addr)
//impossible case
return false;
backup = copy_region(handle, mr);
if (backup == NULL)
return false;
//save the essential information required for the split before mr gets deleted
perms = mr->perms;
begin = mr->addr;
end = mr->end;
if (uc_mem_unmap(handle, mr->addr, int128_get64(mr->size)) != UC_ERR_OK)
goto error;
/* overlapping cases
* |------mr------|
* case 1 |---size--|
* case 2 |--size--|
* case 3 |---size--|
*/
//adjust some things
if (address < begin)
address = begin;
if (chunk_end > end)
chunk_end = end;
//compute sub region sizes
l_size = (size_t)(address - begin);
r_size = (size_t)(end - chunk_end);
m_size = (size_t)(chunk_end - address);
//If there are error in any of the below operations, things are too far gone
//at that point to recover. Could try to remap orignal region, but these smaller
//allocation just failed so no guarantee that we can recover the original
//allocation at this point
if (l_size > 0) {
if (uc_mem_map(handle, begin, l_size, perms) != UC_ERR_OK)
goto error;
if (uc_mem_write(handle, begin, backup, l_size) != UC_ERR_OK)
goto error;
}
if (m_size > 0 && !do_delete) {
if (uc_mem_map(handle, address, m_size, perms) != UC_ERR_OK)
goto error;
if (uc_mem_write(handle, address, backup + l_size, m_size) != UC_ERR_OK)
goto error;
}
if (r_size > 0) {
if (uc_mem_map(handle, chunk_end, r_size, perms) != UC_ERR_OK)
goto error;
if (uc_mem_write(handle, chunk_end, backup + l_size + m_size, r_size) != UC_ERR_OK)
goto error;
}
return true;
error:
free(backup);
return false;
}
UNICORN_EXPORT
uc_err uc_mem_protect(uch handle, uint64_t address, size_t size, uint32_t perms)
{
struct uc_struct* uc = (struct uc_struct *)handle;
MemoryRegion *mr;
if (handle == 0)
// invalid handle
return UC_ERR_UCH;
if (size == 0)
// trivial case, no change
return UC_ERR_OK;
// address must be aligned to uc->target_page_size
if ((address & uc->target_page_align) != 0)
return UC_ERR_INVAL;
// size must be multiple of uc->target_page_size
if ((size & uc->target_page_align) != 0)
return UC_ERR_INVAL;
// check for only valid permissions
if ((perms & ~UC_PROT_ALL) != 0)
return UC_ERR_INVAL;
//check that user's entire requested block is mapped
if (!check_mem_area(uc, address, size))
return UC_ERR_NOMEM;
//Now we know entire region is mapped, so change permissions
//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)) {
//ouch, we are going to need to subdivide blocks
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_NOMEM;
count += len;
addr += len;
}
//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_NOMEM;
}
}
//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
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;
if (handle == 0)
// invalid handle
return UC_ERR_UCH;
if (size == 0)
// nothing to unmap
return UC_ERR_OK;
// address must be aligned to uc->target_page_size
if ((address & uc->target_page_align) != 0)
return UC_ERR_INVAL;
// size must be multiple of uc->target_page_size
if ((size & uc->target_page_align) != 0)
return UC_ERR_MAP;
//check that user's entire requested block is mapped
if (!check_mem_area(uc, address, size))
return UC_ERR_NOMEM;
//Now we know entire region is mapped, so begin the delete
//check trivial case first
mr = memory_mapping(uc, address);
if (address == mr->addr && size == int128_get64(mr->size)) {
//regions exactly matches an existing region just unmap it
//this termiantes a possible recursion between this function and split_region
uc->memory_unmap(uc, mr);
for (i = 0; i < uc->mapped_block_count; i++) {
if (uc->mapped_blocks[i] == mr) {
uc->mapped_block_count--;
//shift remainder of array down over deleted pointer
memcpy(&uc->mapped_blocks[i], &uc->mapped_blocks[i + 1], sizeof(MemoryRegion*) * (uc->mapped_block_count - i));
break;
}
}
}
else {
//ouch, we are going to need to subdivide blocks
size_t count = 0, len;
while(count < size) {
MemoryRegion *mr = memory_mapping(uc, address);
len = MIN(size - count, mr->end - address);
if (!split_region(handle, mr, address, len, true))
return UC_ERR_NOMEM;
count += len;
address += len;
}
}
return UC_ERR_OK;
}
MemoryRegion *memory_mapping(struct uc_struct* uc, uint64_t address)
{
unsigned int i;
@ -675,7 +904,7 @@ static uc_err _hook_mem_invalid(struct uc_struct* uc, uc_cb_eventmem_t callback,
uc->hook_mem_idx = i;
return UC_ERR_OK;
} else
return UC_ERR_OOM;
return UC_ERR_NOMEM;
}
@ -694,7 +923,7 @@ static uc_err _hook_intr(struct uc_struct* uc, void *callback,
uc->hook_intr_idx = i;
return UC_ERR_OK;
} else
return UC_ERR_OOM;
return UC_ERR_NOMEM;
}
@ -718,7 +947,7 @@ static uc_err _hook_insn(struct uc_struct *uc, unsigned int insn_id, void *callb
uc->hook_out_idx = i;
return UC_ERR_OK;
} else
return UC_ERR_OOM;
return UC_ERR_NOMEM;
case UC_X86_INS_IN:
// FIXME: only one event handler at the same time
i = hook_find_new(uc);
@ -729,7 +958,7 @@ static uc_err _hook_insn(struct uc_struct *uc, unsigned int insn_id, void *callb
uc->hook_in_idx = i;
return UC_ERR_OK;
} else
return UC_ERR_OOM;
return UC_ERR_NOMEM;
case UC_X86_INS_SYSCALL:
case UC_X86_INS_SYSENTER:
// FIXME: only one event handler at the same time
@ -741,7 +970,7 @@ static uc_err _hook_insn(struct uc_struct *uc, unsigned int insn_id, void *callb
uc->hook_syscall_idx = i;
return UC_ERR_OK;
} else
return UC_ERR_OOM;
return UC_ERR_NOMEM;
}
break;
}