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afl-clang-fast: modify edit_params() to handle '-r' parameters for partial linking #143

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afl-clang-fast: modify edit_params() to handle '-r' parameters for partial linking #143

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36 changes: 21 additions & 15 deletions llvm_mode/afl-clang-fast.c
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Original file line number Diff line number Diff line change
Expand Up @@ -103,7 +103,7 @@ static void find_obj(u8* argv0) {

static void edit_params(u32 argc, char** argv) {

u8 fortify_set = 0, asan_set = 0, x_set = 0, bit_mode = 0;
u8 fortify_set = 0, asan_set = 0, x_set = 0, bit_mode = 0, partial_linking = 0;
u8 *name;

cc_params = ck_alloc((argc + 128) * sizeof(u8*));
Expand Down Expand Up @@ -148,6 +148,10 @@ static void edit_params(u32 argc, char** argv) {
if (!strcmp(cur, "armv7a-linux-androideabi")) bit_mode = 32;
if (!strcmp(cur, "-m64")) bit_mode = 64;

if (!strcmp(cur, "-Wl,-r") ||
!strcmp(cur, "-Wl,-i") ||
!strcmp(cur, "-r")) partial_linking = 1;

if (!strcmp(cur, "-x")) x_set = 1;

if (!strcmp(cur, "-fsanitize=address") ||
Expand Down Expand Up @@ -278,28 +282,30 @@ static void edit_params(u32 argc, char** argv) {
}

#ifndef __ANDROID__
switch (bit_mode) {
if (!partial_linking) {
switch (bit_mode) {

case 0:
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt.o", obj_path);
break;
case 0:
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt.o", obj_path);
break;

case 32:
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt-32.o", obj_path);
case 32:
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt-32.o", obj_path);

if (access(cc_params[cc_par_cnt - 1], R_OK))
FATAL("-m32 is not supported by your compiler");
if (access(cc_params[cc_par_cnt - 1], R_OK))
FATAL("-m32 is not supported by your compiler");

break;
break;

case 64:
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt-64.o", obj_path);
case 64:
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-rt-64.o", obj_path);

if (access(cc_params[cc_par_cnt - 1], R_OK))
FATAL("-m64 is not supported by your compiler");
if (access(cc_params[cc_par_cnt - 1], R_OK))
FATAL("-m64 is not supported by your compiler");

break;
break;

}
}
#endif

Expand Down