search

buserror / simavr

simavr is a lean, mean and hackable AVR simulator for linux & OSX
GNU General Public License v3.0
1.57k stars 368 forks source link

segfault when running simduino.elf #303

Open JohnPeng47 opened 6 years ago

JohnPeng47 commented 6 years ago

Running command below results in a segfault: run_avr -m atmega328 --freq 1400000 -g obj-x86_64-linux-gnu/simduino.elf

Core dump from gdb (pwngdb plugin so everything looks a bit different):

333 GElf_Shdr shdr; / Section Header / 334 gelf_getshdr(scn, &shdr); 335 char * name = elf_strptr(elf, elf_header.e_shstrndx, shdr.sh_name); 336 printf("Walking elf section '%s'\n", name); 337 ► 338 if (!strcmp(name, ".text")) 339 data_text = elf_getdata(scn, NULL); 340 else if (!strcmp(name, ".data")) 341 data_data = elf_getdata(scn, NULL); 342 else if (!strcmp(name, ".eeprom")) 343 data_ee = elf_getdata(scn, NULL); Stack trace ► f 0 7ffff7b080c4 elf_read_firmware+356 f 1 40195e main+2926 f 2 7ffff7538830 __libc_start_main+240 Program received signal SIGSEGV (fault address 0x0) pwndbg> print name $1 = 0x0

Appears to be null pointer deference by name, which implies that elf_strptr returned NULL. Any ideas?

buserror commented 6 years ago

Well without any idea of the OS and toolchain version you are using, what do you think we can do?

JohnPeng47 commented 6 years ago

Ubuntu 16.0.4 and output from avr-gcc -v: Using built-in specs. Reading specs from /usr/lib/gcc/avr/4.9.2/device-specs/specs-avr2 COLLECT_GCC=avr-gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/avr/4.9.2/lto-wrapper Target: avr Configured with: ../src/configure -v --enable-languages=c,c++ --prefix=/usr/lib --infodir=/usr/share/info --mandir=/usr/share/man --bindir=/usr/bin --libexecdir=/usr/lib --libdir=/usr/lib --enable-shared --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-libssp --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=avr CFLAGS='-g -O2 -fstack-protector-strong -Wformat ' CPPFLAGS=-D_FORTIFY_SOURCE=2 CXXFLAGS='-g -O2 -fstack-protector-strong -Wformat ' FCFLAGS='-g -O2 -fstack-protector-strong' FFLAGS='-g -O2 -fstack-protector-strong' GCJFLAGS='-g -O2 -fstack-protector-strong' LDFLAGS='-Wl,-Bsymbolic-functions -Wl,-z,relro' OBJCFLAGS='-g -O2 -fstack-protector-strong -Wformat ' OBJCXXFLAGS='-g -O2 -fstack-protector-strong -Wformat ' Thread model: single gcc version 4.9.2 (GCC)

evandrix commented 4 years ago

bump i'm facing the exact same issue