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buserror
segfault when running simduino.elf
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?
Well without any idea of the OS and toolchain version you are using, what do you think we can do?
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)
