undefined reference to `dlsym'

bahadur · 07-19-2006, 01:46 AM

I downloaded the source code for the software elfsh from the website

http://elfsh.segfault.net/

i am trying to compile it and it is getting stuck at this place

Quote:

junaid@Dev-jsahibzada:~/Desktop/elfsh-0.51b3$ make
Builting libelfsh...
make[1]: Entering directory `/home/junaid/Desktop/elfsh-0.51b3/libelfsh'
make[1]: Leaving directory `/home/junaid/Desktop/elfsh-0.51b3/libelfsh'
Libelfsh has been built successfully.
Builting libhashelfsh...
Libhash has been built successfully.
Builting ELFsh...
make[1]: Entering directory `/home/junaid/Desktop/elfsh-0.51b3/vm'
gcc grammar.o disasm.o dyn.o hdr.o main.o got.o interp.o notes.o pht.o rel.o sht.o stab.o sym.o quit.o data.o ctors.o dtors.o fileops.o comment.o save.o load.o unload.o list.o doswitch.o tables.o help.o info.o readln.o print.o lexer.o misc.o atomic.o opt.o implicit.o exec.o modules.o findrel.o objects.o cmdapi.o filter.o reladd.o fcthijack.o -o elfsh -L../libelfsh/ -lelfsh -L../libhash/ -lhashelfsh -rdynamic -g3
modules.o: In function `cmd_modload':/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:41: undefined reference to `dlopen'
:/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:49: undefined reference to `dlsym'
:/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:55: undefined reference to `dlsym'
:/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:68: undefined reference to `dlerror'
modules.o: In function `cmd_modunload':/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:91: undefined reference to `dlclose'
collect2: ld returned 1 exit status
make[1]: *** [all] Error 1
make[1]: Leaving directory `/home/junaid/Desktop/elfsh-0.51b3/vm'
make: *** [all] Error 2

can any one tell me whats wrong

here are the specs of my systems

Ubuntu 6.06 LTS

Linux version 2.6.15-26-386 (buildd@terranova) (gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5))

g++ (GCC) 4.0.3 (Ubuntu 4.0.3-1ubuntu5)

ugenn · 07-19-2006, 02:01 AM

If it's autotooled, try adding -ldl to your LDFLAGS.

raskin · 07-19-2006, 02:02 AM

LDFLAGS=-ldl make
Does it help?

bahadur · 07-19-2006, 02:08 AM

how do i do this.

i just have this make file and i type make and every thing happens on its own?

where am i supposed to make this change?

raskin · 07-19-2006, 02:17 AM

You are supposed to either run
LDFLAGS=-ldl make
- that means run command make with LDFLAGS environment variable set to '-ldl' or run
make LDFLAGS+=-ldl
- that passes command to make to add to LDFLAGS -ldl. Both say to make it should tell linker to use libdl.so (to find dlopen and dlsym)

bahadur · 07-19-2006, 02:24 AM

when i use LDFLAGS=-ldl make

i get the same error

Quote:

fcthijack.c: In function ‘cmd_hijack’:
fcthijack.c:22: warning: dereferencing type-punned pointer will break strict-aliasing rules
gcc grammar.o disasm.o dyn.o hdr.o main.o got.o interp.o notes.o pht.o rel.o sht.o stab.o sym.o quit.o data.o ctors.o dtors.o fileops.o comment.o save.o load.o unload.o list.o doswitch.o tables.o help.o info.o readln.o print.o lexer.o misc.o atomic.o opt.o implicit.o exec.o modules.o findrel.o objects.o cmdapi.o filter.o reladd.o fcthijack.o -o elfsh -L../libelfsh/ -lelfsh -L../libhash/ -lhashelfsh -rdynamic -g3
modules.o: In function `cmd_modload':/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:41: undefined reference to `dlopen'
:/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:49: undefined reference to `dlsym'
:/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:55: undefined reference to `dlsym'
:/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:68: undefined reference to `dlerror'
modules.o: In function `cmd_modunload':/home/junaid/Desktop/elfsh-0.51b3/vm/modules.c:91: undefined reference to `dlclose'
collect2: ld returned 1 exit status
make[1]: *** [all] Error 1
make[1]: Leaving directory `/home/junaid/Desktop/elfsh-0.51b3/vm'
make: *** [all] Error 2

and when i use this command

make LDFLAGS+=-ldl

i get these errors

Quote:

fcthijack.c:22: warning: dereferencing type-punned pointer will break strict-aliasing rules
gcc grammar.o disasm.o dyn.o hdr.o main.o got.o interp.o notes.o pht.o rel.o sht.o stab.o sym.o quit.o data.o ctors.o dtors.o fileops.o comment.o save.o load.o unload.o list.o doswitch.o tables.o help.o info.o readln.o print.o lexer.o misc.o atomic.o opt.o implicit.o exec.o modules.o findrel.o objects.o cmdapi.o filter.o reladd.o fcthijack.o -o elfsh -ldl
grammar.o: In function `lookup4':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:236: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:243: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:231: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:240: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:266: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:233: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:245: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:250: undefined reference to `elfsh_error_msg'
grammar.o:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:238: more undefined references to `elfsh_error_msg' follow
grammar.o: In function `lookup_immed':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:37: undefined reference to `elfsh_get_symbol_by_name'
grammar.o: In function `lookup5_index':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:317: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:322: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:329: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:338: undefined reference to `elfsh_error_msg'
grammar.o: In function `lookup3_index':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:122: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:127: undefined reference to `hash_get'
grammar.o: In function `vm_lookup_param':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:319: undefined reference to `elfsh_error_msg'
grammar.o: In function `lookup3':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:188: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:195: undefined reference to `hash_get'
grammar.o: In function `vm_lookup_param':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:124: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:326: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:46: undefined reference to `elfsh_get_dynsymbol_by_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:183: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:131: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:192: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:333: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:185: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:324: undefined reference to `elfsh_error_msg'
grammar.o:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:129: more undefined references to `elfsh_error_msg' follow
grammar.o: In function `vm_lookup_param':/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:55: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/grammar.c:143: undefined reference to `elfsh_error_msg'
disasm.o: In function `display_object':/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:134: undefined reference to `elfsh_is_pltentry'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:144: undefined reference to `elfsh_raw_read'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:156: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:156: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:167: undefined reference to `elfsh_get_foffset_from_vaddr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:167: undefined reference to `elfsh_raw_read'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:180: undefined reference to `elfsh_get_parent_section'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:188: undefined reference to `elfsh_reverse_symbol'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:190: undefined reference to `elfsh_reverse_dynsymbol'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:183: undefined reference to `elfsh_get_foffset_from_vaddr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:183: undefined reference to `elfsh_raw_read'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:136: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:146: undefined reference to `elfsh_error'
disasm.o: In function `display_section':/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:310: undefined reference to `elfsh_get_symtab'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:332: undefined reference to `elfsh_get_symbol_by_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:318: undefined reference to `elfsh_get_parent_section'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:320: undefined reference to `elfsh_get_symbol_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:313: undefined reference to `elfsh_get_anonymous_section'
disasm.o: In function `cmd_disasm':/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:362: undefined reference to `elfsh_get_symtab'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:363: undefined reference to `elfsh_get_dynsymtab'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:393: undefined reference to `elfsh_get_symbol_by_value'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:404: undefined reference to `elfsh_get_symbol_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:413: undefined reference to `elfsh_get_foffset_from_vaddr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:383: undefined reference to `elfsh_get_vaddr_from_foffset'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:385: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:475: undefined reference to `elfsh_get_dynsymbol_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:476: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:476: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:476: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:476: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:490: undefined reference to `elfsh_get_foffset_from_vaddr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:447: undefined reference to `elfsh_get_symbol_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:448: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:448: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:448: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:448: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:462: undefined reference to `elfsh_get_foffset_from_vaddr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:402: undefined reference to `elfsh_get_symbol_size'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:396: undefined reference to `elfsh_get_symbol_by_value'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:399: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:481: undefined reference to `elfsh_get_symbol_size'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:453: undefined reference to `elfsh_get_symbol_size'
:/home/junaid/Desktop/elfsh-0.51b3/vm/disasm.c:375: undefined reference to `elfsh_error_msg'
dyn.o: In function `vm_dynentinfo':/home/junaid/Desktop/elfsh-0.51b3/vm/dyn.c:93: undefined reference to `elfsh_get_dynentry_string'
:/home/junaid/Desktop/elfsh-0.51b3/vm/dyn.c:95: undefined reference to `elfsh_error'
dyn.o: In function `cmd_dyn':/home/junaid/Desktop/elfsh-0.51b3/vm/dyn.c:207: undefined reference to `elfsh_get_dynamic'
:/home/junaid/Desktop/elfsh-0.51b3/vm/dyn.c:217: undefined reference to `elfsh_get_dynentry_type'
hdr.o: In function `cmd_elf':/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:57: undefined reference to `elfsh_get_hdr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:62: undefined reference to `elfsh_get_magic'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:62: undefined reference to `elfsh_get_class'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:62: undefined reference to `elfsh_get_class'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:32: undefined reference to `elfsh_set_magic'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:72: undefined reference to `elfsh_get_magic'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:74: undefined reference to `elfsh_reverse_metasym'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:85: undefined reference to `elfsh_get_arch'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:86: undefined reference to `elfsh_get_objtype'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:87: undefined reference to `elfsh_get_encoding'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:101: undefined reference to `elfsh_get_pax_segmexec'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:101: undefined reference to `elfsh_get_pax_randexec'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:101: undefined reference to `elfsh_get_pax_randmmap'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:101: undefined reference to `elfsh_get_pax_mprotect'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:101: undefined reference to `elfsh_get_pax_emultramp'
:/home/junaid/Desktop/elfsh-0.51b3/vm/hdr.c:101: undefined reference to `elfsh_get_pax_pageexec'
main.o: In function `main':/home/junaid/Desktop/elfsh-0.51b3/vm/main.c:75: undefined reference to `elfsh_error'
got.o: In function `cmd_got':/home/junaid/Desktop/elfsh-0.51b3/vm/got.c:26: undefined reference to `elfsh_get_got'
:/home/junaid/Desktop/elfsh-0.51b3/vm/got.c:36: undefined reference to `elfsh_reverse_symbol'
:/home/junaid/Desktop/elfsh-0.51b3/vm/got.c:37: undefined reference to `elfsh_reverse_dynsymbol'
interp.o: In function `cmd_interp':/home/junaid/Desktop/elfsh-0.51b3/vm/interp.c:17: undefined reference to `elfsh_get_interp'
notes.o: In function `cmd_notes':/home/junaid/Desktop/elfsh-0.51b3/vm/notes.c:25: undefined reference to `elfsh_get_notes'
:/home/junaid/Desktop/elfsh-0.51b3/vm/notes.c:28: undefined reference to `elfsh_get_section_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/notes.c:38: undefined reference to `elfsh_get_notes'
pht.o: In function `cmd_pht':/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:29: undefined reference to `elfsh_get_pht'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:80: undefined reference to `elfsh_get_sht'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:45: undefined reference to `elfsh_segment_is_executable'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:45: undefined reference to `elfsh_segment_is_writable'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:45: undefined reference to `elfsh_segment_is_readable'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:39: undefined reference to `elfsh_get_segment_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:59: undefined reference to `elfsh_segment_is_executable'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:59: undefined reference to `elfsh_segment_is_writable'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:59: undefined reference to `elfsh_segment_is_readable'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:91: undefined reference to `elfsh_get_segment_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:98: undefined reference to `elfsh_segment_is_parent'
:/home/junaid/Desktop/elfsh-0.51b3/vm/pht.c:101: undefined reference to `elfsh_get_section_name'
rel.o: In function `vm_getrelascii':/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:13: undefined reference to `elfsh_get_arch'
rel.o: In function `vm_getmaxrelnbr':/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:30: undefined reference to `elfsh_get_arch'
rel.o: In function `cmd_rel':/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:62: undefined reference to `elfsh_get_reloc'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:74: undefined reference to `elfsh_get_section_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:107: undefined reference to `elfsh_get_relsym'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:107: undefined reference to `elfsh_get_reloffset'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:96: undefined reference to `elfsh_get_symname_from_reloc'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:97: undefined reference to `elfsh_get_reltype'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:114: undefined reference to `elfsh_get_relsym'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:114: undefined reference to `elfsh_get_reloffset'
:/home/junaid/Desktop/elfsh-0.51b3/vm/rel.c:128: undefined reference to `elfsh_get_reloc'
sht.o: In function `cmd_sht':/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:25: undefined reference to `elfsh_get_sht'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_align'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_entsize'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_info'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_link'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_size'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_foffset'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_orderflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_linkflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_strflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_mergeableflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_execflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_writableflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_allocflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:53: undefined reference to `elfsh_get_section_addr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:40: undefined reference to `elfsh_get_section_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:46: undefined reference to `elfsh_get_section_by_index'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:47: undefined reference to `elfsh_get_section_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_link'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_size'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_foffset'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_orderflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_linkflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_strflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_mergeableflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_execflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_writableflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_allocflag'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:74: undefined reference to `elfsh_get_section_addr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sht.c:27: undefined reference to `elfsh_error'
stab.o: In function `cmd_stab':/home/junaid/Desktop/elfsh-0.51b3/vm/stab.c:25: undefined reference to `elfsh_get_stab'
:/home/junaid/Desktop/elfsh-0.51b3/vm/stab.c:37: undefined reference to `elfsh_get_stab_offset'
:/home/junaid/Desktop/elfsh-0.51b3/vm/stab.c:33: undefined reference to `elfsh_get_stab_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/stab.c:35: undefined reference to `elfsh_get_stab_type'
sym.o: In function `ds':/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:44: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:93: undefined reference to `elfsh_get_symbol_link'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:93: undefined reference to `elfsh_get_symbol_size'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:93: undefined reference to `elfsh_get_symbol_value'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:54: undefined reference to `elfsh_get_symbol_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:55: undefined reference to `elfsh_get_symbol_bind'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:64: undefined reference to `elfsh_get_parent_section'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:71: undefined reference to `elfsh_get_section_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:105: undefined reference to `elfsh_get_symbol_size'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:105: undefined reference to `elfsh_get_symbol_value'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:82: undefined reference to `elfsh_get_foffset_from_vaddr'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:68: undefined reference to `elfsh_get_section_by_index'
sym.o: In function `cmd_sym':/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:134: undefined reference to `elfsh_get_symtab'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:137: undefined reference to `elfsh_get_section_by_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:140: undefined reference to `elfsh_get_symbol_name'
sym.o: In function `cmd_dynsym':/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:154: undefined reference to `elfsh_get_dynsymtab'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:157: undefined reference to `elfsh_get_section_by_type'
:/home/junaid/Desktop/elfsh-0.51b3/vm/sym.c:160: undefined reference to `elfsh_get_dynsymbol_name'
quit.o: In function `cmd_quit':/home/junaid/Desktop/elfsh-0.51b3/vm/quit.c:24: undefined reference to `elfsh_unload_obj'
ctors.o: In function `cmd_ctors':/home/junaid/Desktop/elfsh-0.51b3/vm/ctors.c:26: undefined reference to `elfsh_get_ctors'
:/home/junaid/Desktop/elfsh-0.51b3/vm/ctors.c:37: undefined reference to `elfsh_reverse_symbol'
:/home/junaid/Desktop/elfsh-0.51b3/vm/ctors.c:38: undefined reference to `elfsh_reverse_dynsymbol'
dtors.o: In function `cmd_dtors':/home/junaid/Desktop/elfsh-0.51b3/vm/dtors.c:26: undefined reference to `elfsh_get_dtors'
:/home/junaid/Desktop/elfsh-0.51b3/vm/dtors.c:37: undefined reference to `elfsh_reverse_symbol'
:/home/junaid/Desktop/elfsh-0.51b3/vm/dtors.c:38: undefined reference to `elfsh_reverse_dynsymbol'
fileops.o: In function `cmd_write':/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:22: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:51: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:30: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:33: undefined reference to `elfsh_error_msg'
fileops.o: In function `cmd_fixup':/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:165: undefined reference to `elfsh_fixup_bss'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:164: undefined reference to `elfsh_error_msg'
fileops.o: In function `cmd_append':/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:81: undefined reference to `elfsh_get_section_by_index'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:87: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:84: undefined reference to `elfsh_get_section_by_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:108: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:111: undefined reference to `elfsh_append_data_to_section'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:79: undefined reference to `elfsh_error_msg'
fileops.o: In function `cmd_extend':/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:137: undefined reference to `elfsh_get_section_by_index'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:140: undefined reference to `elfsh_get_section_by_name'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:151: undefined reference to `elfsh_append_data_to_section'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:150: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:149: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:135: undefined reference to `elfsh_error_msg'
:/home/junaid/Desktop/elfsh-0.51b3/vm/fileops.c:144: undefined reference to `elfsh_error_msg'
comment.o: In function `cmd_comments':/home/junaid/Desktop/elfsh-0.51b3/vm/comment.c:23: undefined reference to `elfsh_get_comments'
:/home/junaid/Desktop/elfsh-0.51b3/vm/comment.c:28: undefined reference to `elfsh_get_comments_entry'
:/home/junaid/Desktop/elfsh-0.51b3/vm/comment.c:34: undefined reference to `elfsh_get_comments_entry'
save.o: In function `cmd_save':/home/junaid/Desktop/elfsh-0.51b3/vm/save.c:13: undefined reference to `elfsh_save_obj'
load.o: In function `cmd_load':/home/junaid/Desktop/elfsh-0.51b3/vm/load.c:18: undefined reference to `elfsh_map_obj'
:/home/junaid/Desktop/elfsh-0.51b3/vm/load.c:38: undefined reference to `hash_add'
unload.o: In function `cmd_unload':/home/junaid/Desktop/elfsh-0.51b3/vm/unload.c:56: undefined reference to `hash_del'
:/home/junaid/Desktop/elfsh-0.51b3/vm/unload.c:57: undefined reference to `elfsh_unload_obj'
:/home/junaid/Desktop/elfsh-0.51b3/vm/unload.c:22: undefined reference to `hash_get'
:/home/junaid/Desktop/elfsh-0.51b3/vm/unload.c:49: undefined reference to `elfsh_error_msg'
doswitch.o: In function `cmd_doswitch':/home/junaid/Desktop/elfsh-0.51b3/vm/doswitch.c:19: undefined reference to `hash_get'
tables.o: In function `setup_cmdhash':/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:462: undefined reference to `hash_init'
tables.o: In function `setup_consthash':/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:559: undefined reference to `hash_init'
:/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:561: undefined reference to `hash_add'
:/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:565: undefined reference to `hash_add'
:/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:569: undefined reference to `hash_add'
:/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:573: undefined reference to `hash_add'
:/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:577: undefined reference to `hash_add'
tables.o:/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:581: more undefined references to `hash_add' follow
tables.o: In function `vm_setup_hashtables':/home/junaid/Desktop/elfsh-0.51b3/vm/tables.c:623: undefined reference to `hash_init'

'..... omitting the rest
make: *** [all] Error 2

raskin · 07-19-2006, 05:16 AM

try

Code:

make LDFLAGS+='-ldl -L../libelfsh/ -lelfsh -L../libhash/ -lhashelfsh -rdynamic -g3'

I cannot understand why this Makefile forgets its own LDFLAGS switches. But you can readd them.

bahadur · 07-19-2006, 08:33 PM

ok thanks this worked.

can u explain what was wrong?

llmmix · 07-19-2006, 08:45 PM

man nm

cd /usr/lib
nm *.a(or *.so*) | grep <undefined referenced symbol> | grep T

raskin · 07-20-2006, 01:52 PM

I guess man nm doesn't explain the problem completely. The problem is that program used some functions from dynamic library. To load correctly, system must know that this functions will be loaded from some library, because it is the only way to resolve them. So, while linking, linker must know full list of all libraries. Makefile failed to pass correct list. You were offered to use standard ways of adding something to the list. But incorrect Makefile failed to pass the libraries it passed without -ldl. So I gave you a command to override the list completely - and included original libraries.

byterage · 05-12-2007, 05:23 PM

You can modify the vm/Makefile file so that the

#DLOPT = -DUSE_STATIC
#DLOPT_linux-gnu = -ldl
#DLOPT_solaris = -ldl

becomes

#DLOPT = -DUSE_STATIC
#DLOPT_linux-gnu = -ldl
#DLOPT_solaris = -ldl

DLOPT = -ldl

So the option to link with libdl is used.
Note that DLOPT_linux-gnu and DLOPT_solaris don't seem to be used lower in the Makefile.

After the modification just do

make