Hello,

the attached tiny patch fixes the output of `eu-readelf --exception /path/to/binary` for 32-bit stripped binaries. Both elfutils-0.152 and recent git are affected, AFAICT.

Reproducer: $ eu-readelf --exception zyGrib-3.9.9-3.fc16.i686/usr/bin/zyGrib ... Call frame information section [17] '.eh_frame' at offset 0x109440:

[ 0] CIE length=20 ... [ 18] FDE length=16 cie=[ 0] ... [ 2c] CIE length=28 CIE_id: 0 version: 1 augmentation: "zPLR" code_alignment_factor: 1 data_alignment_factor: -4 return_address_register: 8 Augmentation data: 0 eu-readelf: invalid encoding <end of output>

What happens (all functions are in readelf.c): 1. In function print_debug, the 'dwfl_module_getdwarf (dwflmod, &dwbias)' call returns NULL as the binary is stripped, so 'dummy_dbg' from the same function is assigned to 'dbg' variable.

Dwarf dummy_dbg = { .other_byte_order = MY_ELFDATA != ehdr->e_ident[EI_DATA] }; dbg = &dummy_dbg;

2. Later, when reading the .eh_frame contents in function print_debug_frame_section, read_encoded is called. 3. The parameter encoding of read_encoded represents DW_EH_PE_absptr. 4. read_encoded: gelf_getclass (dbg->elf) is called. 5. read_encoded: dbg->elf is NULL, because elf member is not being assigned for 'dummy_dbg'. 6. read_encoded: So gelf_getclass (NULL) returns ELFCLASSNONE 7. read_encoded: "encoding = gelf_getclass (dbg->elf) == ELFCLASS32 ? DW_EH_PE_udata4 : DW_EH_PE_udata8" is evaluated to DW_EH_PE_udata8. 8. read_encoded: Reading of udata8 fails, because this is 32-bit ELF, so there is only udata4 in the binary.

Karel