mirror of
https://github.com/AFLplusplus/AFLplusplus.git
synced 2025-06-10 01:01:33 +00:00
merge afl-llvm-cmplog-rt into afl-llvm-rt
This commit is contained in:
Andrea Fioraldi
parent
2a549d548a
commit
0fce34ec16
@ -132,9 +132,9 @@ ifeq "$(TEST_MMAP)" "1"
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endif
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ifndef AFL_TRACE_PC
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PROGS = ../afl-clang-fast ../afl-llvm-cmplog-rt.o ../afl-llvm-cmplog-rt-32.o ../afl-llvm-cmplog-rt-64.o ../afl-llvm-pass.so ../libLLVMInsTrim.so ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o ../compare-transform-pass.so ../split-compares-pass.so ../split-switches-pass.so ../cmplog-routines-pass.so
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PROGS = ../afl-clang-fast ../afl-llvm-pass.so ../libLLVMInsTrim.so ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o ../compare-transform-pass.so ../split-compares-pass.so ../split-switches-pass.so ../cmplog-routines-pass.so
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else
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PROGS = ../afl-clang-fast ../afl-llvm-cmplog-rt.o ../afl-llvm-cmplog-rt-32.o ../afl-llvm-cmplog-rt-64.o ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o ../compare-transform-pass.so ../split-compares-pass.so ../split-switches-pass.so
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PROGS = ../afl-clang-fast ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o ../compare-transform-pass.so ../split-compares-pass.so ../split-switches-pass.so
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endif
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ifneq "$(CLANGVER)" "$(LLVMVER)"
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@ -233,17 +233,6 @@ afl-common.o: ../src/afl-common.c
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@printf "[*] Building 64-bit variant of the runtime (-m64)... "
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@$(CC) $(CFLAGS) -m64 -fPIC -c $< -o $@ 2>/dev/null; if [ "$$?" = "0" ]; then echo "success!"; else echo "failed (that's fine)"; fi
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../afl-llvm-cmplog-rt.o: afl-llvm-cmplog-rt.o.c | test_deps
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$(CC) $(CFLAGS) -fPIC -c $< -o $@
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../afl-llvm-cmplog-rt-32.o: afl-llvm-cmplog-rt.o.c | test_deps
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@printf "[*] Building 32-bit variant of the CmpLog runtime (-m32)... "
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@$(CC) $(CFLAGS) -m32 -fPIC -c $< -o $@ 2>/dev/null; if [ "$$?" = "0" ]; then echo "success!"; else echo "failed (that's fine)"; fi
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../afl-llvm-cmplog-rt-64.o: afl-llvm-cmplog-rt.o.c | test_deps
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@printf "[*] Building 64-bit variant of the CmpLog runtime (-m64)... "
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@$(CC) $(CFLAGS) -m64 -fPIC -c $< -o $@ 2>/dev/null; if [ "$$?" = "0" ]; then echo "success!"; else echo "failed (that's fine)"; fi
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test_build: $(PROGS)
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@echo "[*] Testing the CC wrapper and instrumentation output..."
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unset AFL_USE_ASAN AFL_USE_MSAN AFL_INST_RATIO; AFL_QUIET=1 AFL_PATH=. AFL_CC=$(CC) AFL_LLVM_LAF_SPLIT_SWITCHES=1 AFL_LLVM_LAF_TRANSFORM_COMPARES=1 AFL_LLVM_LAF_SPLIT_COMPARES=1 ../afl-clang-fast $(CFLAGS) ../test-instr.c -o test-instr $(LDFLAGS)
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@ -419,20 +419,12 @@ static void edit_params(u32 argc, char** argv) {
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switch (bit_mode) {
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case 0:
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if (cmplog_mode)
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cc_params[cc_par_cnt++] =
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alloc_printf("%s/afl-llvm-cmplog-rt.o", obj_path);
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else
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cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt.o", obj_path);
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cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt.o", obj_path);
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break;
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case 32:
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if (cmplog_mode)
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cc_params[cc_par_cnt++] =
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alloc_printf("%s/afl-llvm-cmplog-rt-32.o", obj_path);
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else
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cc_params[cc_par_cnt++] =
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alloc_printf("%s/afl-llvm-rt-32.o", obj_path);
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cc_params[cc_par_cnt++] =
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alloc_printf("%s/afl-llvm-rt-32.o", obj_path);
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if (access(cc_params[cc_par_cnt - 1], R_OK))
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FATAL("-m32 is not supported by your compiler");
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@ -440,12 +432,8 @@ static void edit_params(u32 argc, char** argv) {
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break;
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case 64:
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if (cmplog_mode)
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cc_params[cc_par_cnt++] =
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alloc_printf("%s/afl-llvm-cmplog-rt-64.o", obj_path);
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else
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cc_params[cc_par_cnt++] =
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alloc_printf("%s/afl-llvm-rt-64.o", obj_path);
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cc_params[cc_par_cnt++] =
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alloc_printf("%s/afl-llvm-rt-64.o", obj_path);
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if (access(cc_params[cc_par_cnt - 1], R_OK))
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FATAL("-m64 is not supported by your compiler");
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@ -1,458 +0,0 @@
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/*
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american fuzzy lop++ - LLVM instrumentation bootstrap
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---------------------------------------------------
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Written by Laszlo Szekeres <lszekeres@google.com> and
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Michal Zalewski
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LLVM integration design comes from Laszlo Szekeres.
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Copyright 2015, 2016 Google Inc. All rights reserved.
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Copyright 2019-2020 AFLplusplus Project. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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http://www.apache.org/licenses/LICENSE-2.0
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This code is the rewrite of afl-as.h's main_payload.
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*/
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#ifdef __ANDROID__
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#include "android-ashmem.h"
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#endif
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#include "config.h"
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#include "types.h"
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#include "cmplog.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <unistd.h>
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#include <string.h>
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#include <assert.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <errno.h>
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/* This is a somewhat ugly hack for the experimental 'trace-pc-guard' mode.
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Basically, we need to make sure that the forkserver is initialized after
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the LLVM-generated runtime initialization pass, not before. */
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#ifdef USE_TRACE_PC
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#define CONST_PRIO 5
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#else
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#define CONST_PRIO 0
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#endif /* ^USE_TRACE_PC */
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#include <sys/mman.h>
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#include <fcntl.h>
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/* Globals needed by the injected instrumentation. The __afl_area_initial region
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is used for instrumentation output before __afl_map_shm() has a chance to
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run. It will end up as .comm, so it shouldn't be too wasteful. */
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// In CmpLog, the only usage of __afl_area_ptr is to report errors
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u8* __afl_area_ptr;
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struct cmp_map* __afl_cmp_map;
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__thread u32 __afl_cmp_counter;
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/* Running in persistent mode? */
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static u8 is_persistent;
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/* SHM setup. */
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static void __afl_map_shm(void) {
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u8* id_str = getenv(SHM_ENV_VAR);
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/* If we're running under AFL, attach to the appropriate region, replacing the
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early-stage __afl_area_initial region that is needed to allow some really
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hacky .init code to work correctly in projects such as OpenSSL. */
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if (id_str) {
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#ifdef USEMMAP
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const char* shm_file_path = id_str;
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int shm_fd = -1;
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unsigned char* shm_base = NULL;
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/* create the shared memory segment as if it was a file */
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shm_fd = shm_open(shm_file_path, O_RDWR, 0600);
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if (shm_fd == -1) {
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printf("shm_open() failed\n");
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exit(1);
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}
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/* map the shared memory segment to the address space of the process */
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shm_base = mmap(0, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0);
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if (shm_base == MAP_FAILED) {
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close(shm_fd);
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shm_fd = -1;
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printf("mmap() failed\n");
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exit(2);
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}
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__afl_area_ptr = shm_base;
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#else
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u32 shm_id = atoi(id_str);
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__afl_area_ptr = shmat(shm_id, NULL, 0);
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#endif
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/* Whooooops. */
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if (__afl_area_ptr == (void*)-1) _exit(1);
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/* Write something into the bitmap so that even with low AFL_INST_RATIO,
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our parent doesn't give up on us. */
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__afl_area_ptr[0] = 1;
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}
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id_str = getenv(CMPLOG_SHM_ENV_VAR);
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if (id_str) {
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u32 shm_id = atoi(id_str);
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__afl_cmp_map = shmat(shm_id, NULL, 0);
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if (__afl_cmp_map == (void*)-1) _exit(1);
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}
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}
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/* Fork server logic. */
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static void __afl_start_forkserver(void) {
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static u8 tmp[4];
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s32 child_pid;
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u8 child_stopped = 0;
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void (*old_sigchld_handler)(int) = 0; // = signal(SIGCHLD, SIG_DFL);
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/* Phone home and tell the parent that we're OK. If parent isn't there,
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assume we're not running in forkserver mode and just execute program. */
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if (write(FORKSRV_FD + 1, tmp, 4) != 4) return;
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while (1) {
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u32 was_killed;
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int status;
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/* Wait for parent by reading from the pipe. Abort if read fails. */
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if (read(FORKSRV_FD, &was_killed, 4) != 4) _exit(1);
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/* If we stopped the child in persistent mode, but there was a race
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condition and afl-fuzz already issued SIGKILL, write off the old
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process. */
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if (child_stopped && was_killed) {
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child_stopped = 0;
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if (waitpid(child_pid, &status, 0) < 0) _exit(1);
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}
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if (!child_stopped) {
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/* Once woken up, create a clone of our process. */
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child_pid = fork();
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if (child_pid < 0) _exit(1);
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/* In child process: close fds, resume execution. */
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if (!child_pid) {
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signal(SIGCHLD, old_sigchld_handler);
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close(FORKSRV_FD);
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close(FORKSRV_FD + 1);
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return;
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}
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} else {
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/* Special handling for persistent mode: if the child is alive but
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currently stopped, simply restart it with SIGCONT. */
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kill(child_pid, SIGCONT);
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child_stopped = 0;
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}
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/* In parent process: write PID to pipe, then wait for child. */
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if (write(FORKSRV_FD + 1, &child_pid, 4) != 4) _exit(1);
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if (waitpid(child_pid, &status, is_persistent ? WUNTRACED : 0) < 0)
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_exit(1);
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/* In persistent mode, the child stops itself with SIGSTOP to indicate
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a successful run. In this case, we want to wake it up without forking
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again. */
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if (WIFSTOPPED(status)) child_stopped = 1;
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/* Relay wait status to pipe, then loop back. */
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if (write(FORKSRV_FD + 1, &status, 4) != 4) _exit(1);
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}
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}
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/* A simplified persistent mode handler, used as explained in README.llvm. */
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int __afl_persistent_loop(unsigned int max_cnt) {
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static u8 first_pass = 1;
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static u32 cycle_cnt;
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if (first_pass) {
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/* Make sure that every iteration of __AFL_LOOP() starts with a clean slate.
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On subsequent calls, the parent will take care of that, but on the first
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iteration, it's our job to erase any trace of whatever happened
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before the loop. */
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if (is_persistent) {
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// memset(__afl_area_ptr, 0, MAP_SIZE);
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__afl_area_ptr[0] = 1;
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}
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cycle_cnt = max_cnt;
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first_pass = 0;
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return 1;
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}
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if (is_persistent) {
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if (--cycle_cnt) {
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raise(SIGSTOP);
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__afl_area_ptr[0] = 1;
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return 1;
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} else {
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/* When exiting __AFL_LOOP(), make sure that the subsequent code that
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follows the loop is not traced. We do that by pivoting back to the
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dummy output region. */
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// __afl_area_ptr = __afl_area_initial;
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}
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}
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return 0;
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}
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/* This one can be called from user code when deferred forkserver mode
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is enabled. */
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void __afl_manual_init(void) {
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static u8 init_done;
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if (!init_done) {
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__afl_map_shm();
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__afl_start_forkserver();
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init_done = 1;
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}
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}
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/* Proper initialization routine. */
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__attribute__((constructor(CONST_PRIO))) void __afl_auto_init(void) {
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is_persistent = !!getenv(PERSIST_ENV_VAR);
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if (getenv(DEFER_ENV_VAR)) return;
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__afl_manual_init();
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}
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///// CmpLog instrumentation
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void __sanitizer_cov_trace_cmp1(uint8_t Arg1, uint8_t Arg2) {
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return;
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}
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void __sanitizer_cov_trace_cmp2(uint16_t Arg1, uint16_t Arg2) {
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if (!__afl_cmp_map) return;
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uintptr_t k = (uintptr_t)__builtin_return_address(0);
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k = (k >> 4) ^ (k << 8);
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k &= CMP_MAP_W - 1;
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__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
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u32 hits = __afl_cmp_map->headers[k].hits;
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__afl_cmp_map->headers[k].hits = hits + 1;
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// if (!__afl_cmp_map->headers[k].cnt)
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// __afl_cmp_map->headers[k].cnt = __afl_cmp_counter++;
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__afl_cmp_map->headers[k].shape = 1;
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//__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
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hits &= CMP_MAP_H - 1;
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__afl_cmp_map->log[k][hits].v0 = Arg1;
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__afl_cmp_map->log[k][hits].v1 = Arg2;
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}
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void __sanitizer_cov_trace_cmp4(uint32_t Arg1, uint32_t Arg2) {
|
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|
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if (!__afl_cmp_map) return;
|
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|
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uintptr_t k = (uintptr_t)__builtin_return_address(0);
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k = (k >> 4) ^ (k << 8);
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k &= CMP_MAP_W - 1;
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|
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__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
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u32 hits = __afl_cmp_map->headers[k].hits;
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__afl_cmp_map->headers[k].hits = hits + 1;
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__afl_cmp_map->headers[k].shape = 3;
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hits &= CMP_MAP_H - 1;
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__afl_cmp_map->log[k][hits].v0 = Arg1;
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__afl_cmp_map->log[k][hits].v1 = Arg2;
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|
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}
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|
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void __sanitizer_cov_trace_cmp8(uint64_t Arg1, uint64_t Arg2) {
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|
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if (!__afl_cmp_map) return;
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uintptr_t k = (uintptr_t)__builtin_return_address(0);
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k = (k >> 4) ^ (k << 8);
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k &= CMP_MAP_W - 1;
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__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
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|
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u32 hits = __afl_cmp_map->headers[k].hits;
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__afl_cmp_map->headers[k].hits = hits + 1;
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|
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__afl_cmp_map->headers[k].shape = 7;
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hits &= CMP_MAP_H - 1;
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__afl_cmp_map->log[k][hits].v0 = Arg1;
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__afl_cmp_map->log[k][hits].v1 = Arg2;
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}
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#if defined(__APPLE__)
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#pragma weak __sanitizer_cov_trace_const_cmp1 = __sanitizer_cov_trace_cmp1
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#pragma weak __sanitizer_cov_trace_const_cmp2 = __sanitizer_cov_trace_cmp2
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#pragma weak __sanitizer_cov_trace_const_cmp4 = __sanitizer_cov_trace_cmp4
|
||||
#pragma weak __sanitizer_cov_trace_const_cmp8 = __sanitizer_cov_trace_cmp8
|
||||
#else
|
||||
void __sanitizer_cov_trace_const_cmp1(uint8_t Arg1, uint8_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp1")));
|
||||
void __sanitizer_cov_trace_const_cmp2(uint16_t Arg1, uint16_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp2")));
|
||||
void __sanitizer_cov_trace_const_cmp4(uint32_t Arg1, uint32_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp4")));
|
||||
void __sanitizer_cov_trace_const_cmp8(uint64_t Arg1, uint64_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp8")));
|
||||
#endif /* defined(__APPLE__) */
|
||||
|
||||
void __sanitizer_cov_trace_switch(uint64_t Val, uint64_t* Cases) {
|
||||
|
||||
for (uint64_t i = 0; i < Cases[0]; i++) {
|
||||
|
||||
uintptr_t k = (uintptr_t)__builtin_return_address(0) + i;
|
||||
k = (k >> 4) ^ (k << 8);
|
||||
k &= CMP_MAP_W - 1;
|
||||
|
||||
__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
|
||||
|
||||
u32 hits = __afl_cmp_map->headers[k].hits;
|
||||
__afl_cmp_map->headers[k].hits = hits + 1;
|
||||
|
||||
__afl_cmp_map->headers[k].shape = 7;
|
||||
|
||||
hits &= CMP_MAP_H - 1;
|
||||
__afl_cmp_map->log[k][hits].v0 = Val;
|
||||
__afl_cmp_map->log[k][hits].v1 = Cases[i + 2];
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// POSIX shenanigan to see if an area is mapped.
|
||||
// If it is mapped as X-only, we have a problem, so maybe we should add a check
|
||||
// to avoid to call it on .text addresses
|
||||
static int area_is_mapped(void* ptr, size_t len) {
|
||||
|
||||
char * p = ptr;
|
||||
char * page = (char*)((uintptr_t)p & ~(sysconf(_SC_PAGE_SIZE) -1));
|
||||
|
||||
int r = msync(page, (p - page) + len, MS_ASYNC);
|
||||
if (r < 0)
|
||||
return errno != ENOMEM;
|
||||
return 1;
|
||||
|
||||
}
|
||||
|
||||
void __cmplog_rtn_hook(void* ptr1, void* ptr2) {
|
||||
|
||||
if (!area_is_mapped(ptr1, 32) || !area_is_mapped(ptr2, 32))
|
||||
return;
|
||||
|
||||
uintptr_t k = (uintptr_t)__builtin_return_address(0);
|
||||
k = (k >> 4) ^ (k << 8);
|
||||
k &= CMP_MAP_W - 1;
|
||||
|
||||
__afl_cmp_map->headers[k].type = CMP_TYPE_RTN;
|
||||
|
||||
u32 hits = __afl_cmp_map->headers[k].hits;
|
||||
__afl_cmp_map->headers[k].hits = hits + 1;
|
||||
|
||||
__afl_cmp_map->headers[k].shape = 31;
|
||||
|
||||
hits &= CMP_MAP_RTN_H - 1;
|
||||
__builtin_memcpy(((struct cmpfn_operands*)__afl_cmp_map->log[k])[hits].v0, ptr1, 32);
|
||||
__builtin_memcpy(((struct cmpfn_operands*)__afl_cmp_map->log[k])[hits].v1, ptr2, 32);
|
||||
|
||||
}
|
||||
@ -34,6 +34,7 @@
|
||||
#include <string.h>
|
||||
#include <assert.h>
|
||||
#include <stdint.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include <sys/mman.h>
|
||||
#include <sys/shm.h>
|
||||
@ -66,6 +67,9 @@ u32 __afl_prev_loc;
|
||||
__thread u32 __afl_prev_loc;
|
||||
#endif
|
||||
|
||||
struct cmp_map* __afl_cmp_map;
|
||||
__thread u32 __afl_cmp_counter;
|
||||
|
||||
/* Running in persistent mode? */
|
||||
|
||||
static u8 is_persistent;
|
||||
@ -351,3 +355,152 @@ void __sanitizer_cov_trace_pc_guard_init(uint32_t* start, uint32_t* stop) {
|
||||
|
||||
}
|
||||
|
||||
///// CmpLog instrumentation
|
||||
|
||||
void __sanitizer_cov_trace_cmp1(uint8_t Arg1, uint8_t Arg2) {
|
||||
|
||||
return;
|
||||
|
||||
}
|
||||
|
||||
void __sanitizer_cov_trace_cmp2(uint16_t Arg1, uint16_t Arg2) {
|
||||
|
||||
if (!__afl_cmp_map) return;
|
||||
|
||||
uintptr_t k = (uintptr_t)__builtin_return_address(0);
|
||||
k = (k >> 4) ^ (k << 8);
|
||||
k &= CMP_MAP_W - 1;
|
||||
|
||||
__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
|
||||
|
||||
u32 hits = __afl_cmp_map->headers[k].hits;
|
||||
__afl_cmp_map->headers[k].hits = hits + 1;
|
||||
// if (!__afl_cmp_map->headers[k].cnt)
|
||||
// __afl_cmp_map->headers[k].cnt = __afl_cmp_counter++;
|
||||
|
||||
__afl_cmp_map->headers[k].shape = 1;
|
||||
//__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
|
||||
|
||||
hits &= CMP_MAP_H - 1;
|
||||
__afl_cmp_map->log[k][hits].v0 = Arg1;
|
||||
__afl_cmp_map->log[k][hits].v1 = Arg2;
|
||||
|
||||
}
|
||||
|
||||
void __sanitizer_cov_trace_cmp4(uint32_t Arg1, uint32_t Arg2) {
|
||||
|
||||
if (!__afl_cmp_map) return;
|
||||
|
||||
uintptr_t k = (uintptr_t)__builtin_return_address(0);
|
||||
k = (k >> 4) ^ (k << 8);
|
||||
k &= CMP_MAP_W - 1;
|
||||
|
||||
__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
|
||||
|
||||
u32 hits = __afl_cmp_map->headers[k].hits;
|
||||
__afl_cmp_map->headers[k].hits = hits + 1;
|
||||
|
||||
__afl_cmp_map->headers[k].shape = 3;
|
||||
|
||||
hits &= CMP_MAP_H - 1;
|
||||
__afl_cmp_map->log[k][hits].v0 = Arg1;
|
||||
__afl_cmp_map->log[k][hits].v1 = Arg2;
|
||||
|
||||
}
|
||||
|
||||
void __sanitizer_cov_trace_cmp8(uint64_t Arg1, uint64_t Arg2) {
|
||||
|
||||
if (!__afl_cmp_map) return;
|
||||
|
||||
uintptr_t k = (uintptr_t)__builtin_return_address(0);
|
||||
k = (k >> 4) ^ (k << 8);
|
||||
k &= CMP_MAP_W - 1;
|
||||
|
||||
__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
|
||||
|
||||
u32 hits = __afl_cmp_map->headers[k].hits;
|
||||
__afl_cmp_map->headers[k].hits = hits + 1;
|
||||
|
||||
__afl_cmp_map->headers[k].shape = 7;
|
||||
|
||||
hits &= CMP_MAP_H - 1;
|
||||
__afl_cmp_map->log[k][hits].v0 = Arg1;
|
||||
__afl_cmp_map->log[k][hits].v1 = Arg2;
|
||||
|
||||
}
|
||||
|
||||
#if defined(__APPLE__)
|
||||
#pragma weak __sanitizer_cov_trace_const_cmp1 = __sanitizer_cov_trace_cmp1
|
||||
#pragma weak __sanitizer_cov_trace_const_cmp2 = __sanitizer_cov_trace_cmp2
|
||||
#pragma weak __sanitizer_cov_trace_const_cmp4 = __sanitizer_cov_trace_cmp4
|
||||
#pragma weak __sanitizer_cov_trace_const_cmp8 = __sanitizer_cov_trace_cmp8
|
||||
#else
|
||||
void __sanitizer_cov_trace_const_cmp1(uint8_t Arg1, uint8_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp1")));
|
||||
void __sanitizer_cov_trace_const_cmp2(uint16_t Arg1, uint16_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp2")));
|
||||
void __sanitizer_cov_trace_const_cmp4(uint32_t Arg1, uint32_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp4")));
|
||||
void __sanitizer_cov_trace_const_cmp8(uint64_t Arg1, uint64_t Arg2)
|
||||
__attribute__((alias("__sanitizer_cov_trace_cmp8")));
|
||||
#endif /* defined(__APPLE__) */
|
||||
|
||||
void __sanitizer_cov_trace_switch(uint64_t Val, uint64_t* Cases) {
|
||||
|
||||
for (uint64_t i = 0; i < Cases[0]; i++) {
|
||||
|
||||
uintptr_t k = (uintptr_t)__builtin_return_address(0) + i;
|
||||
k = (k >> 4) ^ (k << 8);
|
||||
k &= CMP_MAP_W - 1;
|
||||
|
||||
__afl_cmp_map->headers[k].type = CMP_TYPE_INS;
|
||||
|
||||
u32 hits = __afl_cmp_map->headers[k].hits;
|
||||
__afl_cmp_map->headers[k].hits = hits + 1;
|
||||
|
||||
__afl_cmp_map->headers[k].shape = 7;
|
||||
|
||||
hits &= CMP_MAP_H - 1;
|
||||
__afl_cmp_map->log[k][hits].v0 = Val;
|
||||
__afl_cmp_map->log[k][hits].v1 = Cases[i + 2];
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// POSIX shenanigan to see if an area is mapped.
|
||||
// If it is mapped as X-only, we have a problem, so maybe we should add a check
|
||||
// to avoid to call it on .text addresses
|
||||
static int area_is_mapped(void* ptr, size_t len) {
|
||||
|
||||
char * p = ptr;
|
||||
char * page = (char*)((uintptr_t)p & ~(sysconf(_SC_PAGE_SIZE) -1));
|
||||
|
||||
int r = msync(page, (p - page) + len, MS_ASYNC);
|
||||
if (r < 0)
|
||||
return errno != ENOMEM;
|
||||
return 1;
|
||||
|
||||
}
|
||||
|
||||
void __cmplog_rtn_hook(void* ptr1, void* ptr2) {
|
||||
|
||||
if (!area_is_mapped(ptr1, 32) || !area_is_mapped(ptr2, 32))
|
||||
return;
|
||||
|
||||
uintptr_t k = (uintptr_t)__builtin_return_address(0);
|
||||
k = (k >> 4) ^ (k << 8);
|
||||
k &= CMP_MAP_W - 1;
|
||||
|
||||
__afl_cmp_map->headers[k].type = CMP_TYPE_RTN;
|
||||
|
||||
u32 hits = __afl_cmp_map->headers[k].hits;
|
||||
__afl_cmp_map->headers[k].hits = hits + 1;
|
||||
|
||||
__afl_cmp_map->headers[k].shape = 31;
|
||||
|
||||
hits &= CMP_MAP_RTN_H - 1;
|
||||
__builtin_memcpy(((struct cmpfn_operands*)__afl_cmp_map->log[k])[hits].v0, ptr1, 32);
|
||||
__builtin_memcpy(((struct cmpfn_operands*)__afl_cmp_map->log[k])[hits].v1, ptr2, 32);
|
||||
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user