50b0c90e0a
* Restructuration of libafl dirs. Formatting + export of maps struct and functions. * Fix wrong header path. * Fix misc path
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "exec/exec-all.h"
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#include "libafl/jit.h"
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#ifndef TARGET_LONG_BITS
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#error "TARGET_LONG_BITS not defined"
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#endif
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/*
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pub extern "C" fn trace_edge_hitcount(id: u64, _data: u64) {
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unsafe {
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EDGES_MAP[id as usize] = EDGES_MAP[id as usize].wrapping_add(1);
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}
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}
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pub extern "C" fn trace_edge_single(id: u64, _data: u64) {
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unsafe {
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EDGES_MAP[id as usize] = 1;
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}
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}
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*/
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// from libafl_targets coverage.rs
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// correct size doesn't matter here
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uint8_t __afl_area_ptr_local[65536] __attribute__((weak));
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size_t __afl_map_size __attribute__((weak));
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size_t libafl_jit_trace_edge_hitcount(uint64_t data, uint64_t id) {
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TCGv_ptr map_ptr = tcg_constant_ptr(__afl_area_ptr_local);
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TCGv_i32 counter = tcg_temp_new_i32();
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tcg_gen_ld8u_i32(counter, map_ptr, (tcg_target_long)id);
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tcg_gen_addi_i32(counter, counter, 1);
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tcg_gen_st8_i32(counter, map_ptr, (tcg_target_long)id);
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return 3; // # instructions
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}
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size_t libafl_jit_trace_edge_single(uint64_t data, uint64_t id) {
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TCGv_ptr map_ptr = tcg_constant_ptr(__afl_area_ptr_local);
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TCGv_i32 counter = tcg_temp_new_i32();
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tcg_gen_movi_i32(counter, 1);
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tcg_gen_st8_i32(counter, map_ptr, (tcg_target_long)id);
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return 2; // # instructions
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}
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uint64_t __prev_loc = 0;
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size_t libafl_jit_trace_block_hitcount(uint64_t data, uint64_t id) {
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TCGv_ptr map_ptr = tcg_constant_ptr(__afl_area_ptr_local);
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TCGv_ptr prev_loc_ptr = tcg_constant_ptr(&__prev_loc);
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TCGv_i32 counter = tcg_temp_new_i32();
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TCGv_i64 id_r = tcg_temp_new_i64();
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TCGv_i64 prev_loc = tcg_temp_new_i64();
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TCGv_ptr prev_loc2 = tcg_temp_new_ptr();
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// Compute location => 5 insn
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tcg_gen_ld_i64(prev_loc, prev_loc_ptr, 0);
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tcg_gen_xori_i64(prev_loc, prev_loc, (int64_t) id);
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tcg_gen_andi_i64(prev_loc, prev_loc, (int64_t) (__afl_map_size - 1));
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tcg_gen_trunc_i64_ptr(prev_loc2, prev_loc);
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tcg_gen_add_ptr(prev_loc2, map_ptr, prev_loc2);
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// Update map => 3 insn
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tcg_gen_ld8u_i32(counter, prev_loc2, 0);
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tcg_gen_addi_i32(counter, counter, 1);
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tcg_gen_st8_i32(counter, prev_loc2, 0);
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// Update prev_loc => 3 insn
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tcg_gen_movi_i64(id_r, (int64_t) id);
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tcg_gen_shri_i64(id_r, id_r, 1);
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tcg_gen_st_i64(id_r, prev_loc_ptr, 0);
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return 11; // # instructions
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}
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size_t libafl_jit_trace_block_single(uint64_t data, uint64_t id) {
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TCGv_ptr map_ptr = tcg_constant_ptr(__afl_area_ptr_local);
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TCGv_ptr prev_loc_ptr = tcg_constant_ptr(&__prev_loc);
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TCGv_i32 counter = tcg_temp_new_i32();
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TCGv_i64 id_r = tcg_temp_new_i64();
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TCGv_i64 prev_loc = tcg_temp_new_i64();
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TCGv_ptr prev_loc2 = tcg_temp_new_ptr();
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// Compute location => 5 insn
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tcg_gen_ld_i64(prev_loc, prev_loc_ptr, 0);
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tcg_gen_xori_i64(prev_loc, prev_loc, (int64_t) id);
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tcg_gen_andi_i64(prev_loc, prev_loc, (int64_t) (__afl_map_size - 1));
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tcg_gen_trunc_i64_ptr(prev_loc2, prev_loc);
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tcg_gen_add_ptr(map_ptr, map_ptr, prev_loc2);
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// Update map => 2 insn
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tcg_gen_movi_i32(counter, 1);
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tcg_gen_st8_i32(counter, map_ptr, 0);
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// Update prev_loc => 3 insn
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tcg_gen_movi_i64(id_r, (int64_t) id);
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tcg_gen_shri_i64(id_r, id_r, 1);
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tcg_gen_st_i64(id_r, prev_loc_ptr, 0);
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return 10; // # instructions
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}
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