* unknown error after dwarf_cfi_addrframe()
@ 2019-02-07 22:57 Sasha Da Rocha Pinheiro
2019-02-12 1:15 ` Sasha Da Rocha Pinheiro
0 siblings, 1 reply; 12+ messages in thread
From: Sasha Da Rocha Pinheiro @ 2019-02-07 22:57 UTC (permalink / raw)
To: elfutils-devel, Mark Wielaard
[-- Attachment #1: Type: text/plain, Size: 8023 bytes --]
Hi all,
I'm trying to read frame info from .eh_frame section. But I'm getting "unknown error".
I'll copy the snippet where I use libelf functions to print all sections of the file and get the index of .eh_frame, to then use libdw to go through .eh_frame Dwarf_CFI_Entry entries, to count them. The count matches was dwarfdump from libdwarf prints out. I'll attach that too.
Following I create a Dwarf_CFI and try to lock up an address with dwarf_cfi_addrframe(). But got unknown error.
I'll attach the binary too.
As you can see in the GDB output below that I try to get frame info for the address 0x40ae19, and the FDE with index 94 (see dwarfdump output) has addresses of <0x0040ae19:0x0040aed3>.
Regards,
Sasha
============ snippet for what I'm doing ==============
//testing printing count for CIE and FDE in this eh_frame
auto e_ident = elf_getident(dbg_eh_frame, NULL);
Elf_Scn *scn = NULL;
Elf64_Shdr *shdr;
char *section_name;
size_t eh_frame_index = -1, shstrndx;
if(elf_getshdrstrndx(dbg_eh_frame, &shstrndx)!=0)
fprintf(stderr, "elf_getshdrstrndx() failed: %s.", elf_errmsg(-1));
while((scn = elf_nextscn(dbg_eh_frame,scn))!=NULL)
{
if((shdr = elf64_getshdr(scn))!=shdr)
fprintf(stderr, "getshdr() failed: %s.\n", elf_errmsg(-1));
if((section_name = elf_strptr(dbg_eh_frame, shstrndx, shdr->sh_name))==NULL)
fprintf(stderr, "elf_strptr() failed: %s.\n", elf_errmsg(-1));
fprintf(stderr, "Section [%d]: %s\n", elf_ndxscn(scn), section_name);
if(strcmp(section_name, ".eh_frame")==0)
eh_frame_index = elf_ndxscn(scn);
}
assert(eh_frame_index!=-1);
scn = elf_getscn(dbg_eh_frame,eh_frame_index);
fprintf( stderr, "elf_getscn() failed: %s.\n", elf_errmsg(-1));
auto eh_frame_data = elf_getdata(scn, NULL);
fprintf( stderr, "elf_getdata() failed: %s.\n", elf_errmsg(-1));
assert(eh_frame_data!=NULL);
Dwarf_CFI_Entry entry;
Dwarf_Off offset = 0, next_offset, saved_cur_offset;
int res = 0, count_fde=0, count_cie=0;
do{
res = dwarf_next_cfi((const unsigned char *)e_ident, eh_frame_data,
true, offset, &next_offset, &entry);
saved_cur_offset = offset;
offset = next_offset;
if(res==1 && next_offset==(Dwarf_Off)-1) break;
if(res == -1) {
if (offset != saved_cur_offset) {
fprintf(stderr, "dwarf_next_cfi() returns -1. Error: %s\n", dwarf_errmsg(-1));
continue; // Soft error, skip to the next CFI entry
}
// Since offset didn't advance, we can't skip this CFI entry and need to quit
break;
}
if(dwarf_cfi_cie_p(&entry)) count_cie++;
else count_fde++;
}while(true);
cerr << "Count_cie: " << count_cie << endl;
cerr << "Count_fde: " << count_fde << endl;
Dwarf_CFI * cfi = nullptr;
cfi = dwarf_getcfi_elf(dbg_eh_frame);
if(!cfi) assert(false);
auto next_pc = range.first;
while(next_pc < range.second)
{
Dwarf_Frame * frame = NULL;
int result = dwarf_cfi_addrframe(cfi, next_pc, &frame);
fprintf( stderr, "dwarf_cfi_addrframe() failed: %s.\n", dwarf_errmsg(-1));
if(result==-1) break;
============ end of snippet ==============
GDB output:
Thread 1 "test_driver" hit Breakpoint 11, Dyninst::DwarfDyninst::DwarfFrameParser::getRegsForFunction (
this=0x1a70320, range=..., reg=..., locs=std::vector of length 0, capacity 0, err_result=@0x7fffffffd3fc: 32767)
at /<hidden-filepath>...Parser.C:162
162 {
(gdb) until 231
Section [1]: .interp
Section [2]: .note.ABI-tag
Section [3]: .note.gnu.build-id
Section [4]: .gnu.hash
Section [5]: .dynsym
Section [6]: .dynstr
Section [7]: .gnu.version
Section [8]: .gnu.version_r
Section [9]: .rela.dyn
Section [10]: .rela.plt
Section [11]: .init
Section [12]: .plt
Section [13]: .plt.got
Section [14]: .text
Section [15]: .fini
Section [16]: .rodata
Section [17]: .eh_frame_hdr
Section [18]: .eh_frame
Section [19]: .init_array
Section [20]: .fini_array
Section [21]: .jcr
Section [22]: .dynamic
Section [23]: .got
Section [24]: .got.plt
Section [25]: .data
Section [26]: .bss
Section [27]: .gnu_debuglink
Section [28]: .shstrtab
elf_getscn() failed: no error.
elf_getdata() failed: no error.
Count_cie: 2
Count_fde: 205
Dyninst::DwarfDyninst::DwarfFrameParser::getRegsForFunction (this=0x1a70320, range=..., reg=...,
locs=std::vector of length 0, capacity 0, err_result=@0x7fffffffd3fc: Dyninst::DwarfDyninst::FE_No_Error)
at /<hidden-filepath>...Parser.C:231
231 Dwarf_CFI * cfi = nullptr;
(gdb) n
232 cfi = dwarf_getcfi_elf(dbg_eh_frame);
(gdb)
233 if(!cfi) assert(false);
(gdb)
235 auto next_pc = range.first;
(gdb)
236 while(next_pc < range.second)
(gdb)
238 Dwarf_Frame * frame = NULL;
(gdb)
239 int result = dwarf_cfi_addrframe(cfi, next_pc, &frame);
(gdb)
240 fprintf( stderr, "dwarf_cfi_addrframe() failed: %s.\n", dwarf_errmsg(-1));
(gdb)
dwarf_cfi_addrframe() failed: unknown error.
241 if(result==-1) break;
(gdb) p/x next_pc
$73 = 0x40ae19
[-- Attachment #2: dyninst_group_test.dyn_g++_64_none_none --]
[-- Type: application/octet-stream, Size: 91456 bytes --]
[-- Attachment #3: dwarfdump_minusF_output.txt --]
[-- Type: text/plain, Size: 91090 bytes --]
.eh_frame
fde:
< 0><0x00406720:0x004069c0><><cie offset 0x0000001c::cie index 1><fde offset 0x00000048 length: 0x00000024>
<eh aug data len 0x0>
0x00406720: <off cfa=16(r7) > <off r16=-8(cfa) >
0x00406726: <off cfa=24(r7) > <off r16=-8(cfa) >
0x00406730: <expr cfa=expr-block-len=11> <off r16=-8(cfa) >
< 1><0x004069d0:0x004069fa><><cie offset 0x0000001c::cie index 0><fde offset 0x00000018 length: 0x00000014>
<eh aug data len 0x0>
0x004069d0: <off cfa=08(r7) >
< 2><0x00406ac6:0x00406b75><><cie offset 0x00000044::cie index 1><fde offset 0x00000070 length: 0x0000001c>
<eh aug data len 0x0>
0x00406ac6: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00406ac7: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406aca: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406b74: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 3><0x00406b75:0x00406b81><><cie offset 0x00000064::cie index 1><fde offset 0x00000090 length: 0x0000001c>
<eh aug data len 0x0>
0x00406b75: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00406b76: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406b79: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406b80: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 4><0x00406b81:0x00406c0a><><cie offset 0x00000084::cie index 1><fde offset 0x000000b0 length: 0x00000024>
<eh aug data len 0x0>
0x00406b81: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00406b82: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406b85: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406b8a: <off cfa=16(r6) > <off r3=-24(cfa) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406c09: <off cfa=08(r7) > <off r3=-24(cfa) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 5><0x00406c0a:0x00406c90><><cie offset 0x000000ac::cie index 1><fde offset 0x000000d8 length: 0x00000024>
<eh aug data len 0x0>
0x00406c0a: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00406c0b: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406c0e: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406c13: <off cfa=16(r6) > <off r3=-24(cfa) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406c8f: <off cfa=08(r7) > <off r3=-24(cfa) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 6><0x00406c90:0x00406cd1><><cie offset 0x000000d4::cie index 1><fde offset 0x00000100 length: 0x0000001c>
<eh aug data len 0x0>
0x00406c90: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00406c91: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406c94: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406cd0: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 7><0x00406cd1:0x00406e15><><cie offset 0x000000f4::cie index 1><fde offset 0x00000120 length: 0x0000001c>
<eh aug data len 0x0>
0x00406cd1: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00406cd2: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406cd5: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406e14: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 8><0x00406e15:0x00407738><><cie offset 0x00000114::cie index 1><fde offset 0x00000140 length: 0x0000001c>
<eh aug data len 0x0>
0x00406e15: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00406e16: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00406e19: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 9><0x00407738:0x0040775d><><cie offset 0x00000134::cie index 1><fde offset 0x00000160 length: 0x0000001c>
<eh aug data len 0x0>
0x00407738: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407739: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040773c: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040775c: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 10><0x0040775d:0x00407790><><cie offset 0x00000154::cie index 1><fde offset 0x00000180 length: 0x0000001c>
<eh aug data len 0x0>
0x0040775d: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040775e: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407761: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040778f: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 11><0x00407790:0x00407843><><cie offset 0x00000174::cie index 1><fde offset 0x000001a0 length: 0x0000001c>
<eh aug data len 0x0>
0x00407790: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407791: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407794: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407842: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 12><0x00407843:0x004078b0><><cie offset 0x00000194::cie index 1><fde offset 0x000001c0 length: 0x0000001c>
<eh aug data len 0x0>
0x00407843: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407844: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407847: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x004078af: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 13><0x004078b0:0x004078f5><><cie offset 0x000001b4::cie index 1><fde offset 0x000001e0 length: 0x0000001c>
<eh aug data len 0x0>
0x004078b0: <off cfa=08(r7) > <off r16=-8(cfa) >
0x004078b1: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x004078b4: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x004078f4: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 14><0x004078f5:0x00407910><><cie offset 0x000001d4::cie index 1><fde offset 0x00000200 length: 0x0000001c>
<eh aug data len 0x0>
0x004078f5: <off cfa=08(r7) > <off r16=-8(cfa) >
0x004078f6: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x004078f9: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040790f: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 15><0x00407910:0x00407a17><><cie offset 0x000001f4::cie index 1><fde offset 0x00000220 length: 0x0000001c>
<eh aug data len 0x0>
0x00407910: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407911: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407914: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407a16: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 16><0x00407a17:0x00407a79><><cie offset 0x00000214::cie index 1><fde offset 0x00000240 length: 0x0000001c>
<eh aug data len 0x0>
0x00407a17: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407a18: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407a1b: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407a78: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 17><0x00407a79:0x00407a94><><cie offset 0x00000234::cie index 1><fde offset 0x00000260 length: 0x0000001c>
<eh aug data len 0x0>
0x00407a79: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407a7a: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407a7d: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407a93: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 18><0x00407a94:0x00407b0d><><cie offset 0x00000254::cie index 1><fde offset 0x00000280 length: 0x0000001c>
<eh aug data len 0x0>
0x00407a94: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407a95: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407a98: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407b0c: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 19><0x00407b0d:0x00407b6a><><cie offset 0x00000274::cie index 1><fde offset 0x000002a0 length: 0x0000001c>
<eh aug data len 0x0>
0x00407b0d: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407b0e: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407b11: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407b69: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 20><0x00407b6a:0x00407b85><><cie offset 0x00000294::cie index 1><fde offset 0x000002c0 length: 0x0000001c>
<eh aug data len 0x0>
0x00407b6a: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407b6b: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407b6e: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407b84: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 21><0x00407b85:0x00407c1c><><cie offset 0x000002b4::cie index 1><fde offset 0x000002e0 length: 0x0000001c>
<eh aug data len 0x0>
0x00407b85: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407b86: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407b89: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407c1b: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 22><0x00407c1c:0x00407c4b><><cie offset 0x000002d4::cie index 1><fde offset 0x00000300 length: 0x0000001c>
<eh aug data len 0x0>
0x00407c1c: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407c1d: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407c20: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407c4a: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 23><0x00407c4b:0x00407ef9><><cie offset 0x000002f4::cie index 1><fde offset 0x00000320 length: 0x0000001c>
<eh aug data len 0x0>
0x00407c4b: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407c4c: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407c4f: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407ef8: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 24><0x00407ef9:0x00407f28><><cie offset 0x00000314::cie index 1><fde offset 0x00000340 length: 0x0000001c>
<eh aug data len 0x0>
0x00407ef9: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407efa: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407efd: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407f27: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 25><0x00407f28:0x00407f43><><cie offset 0x00000334::cie index 1><fde offset 0x00000360 length: 0x0000001c>
<eh aug data len 0x0>
0x00407f28: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407f29: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407f2c: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407f42: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 26><0x00407f43:0x0040861c><><cie offset 0x00000354::cie index 1><fde offset 0x00000380 length: 0x0000001c>
<eh aug data len 0x0>
0x00407f43: <off cfa=08(r7) > <off r16=-8(cfa) >
0x00407f44: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00407f47: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040861b: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 27><0x0040861c:0x0040864b><><cie offset 0x00000374::cie index 1><fde offset 0x000003a0 length: 0x0000001c>
<eh aug data len 0x0>
0x0040861c: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040861d: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x00408620: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040864a: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 28><0x0040864b:0x00408666><><cie offset 0x00000394::cie index 1><fde offset 0x000003c0 length: 0x0000001c>
<eh aug data len 0x0>
0x0040864b: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040864c: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
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0x0040da61: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040da64: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040da91: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 180><0x0040da92:0x0040dafe><><cie offset 0x00001694::cie index 1><fde offset 0x000016c0 length: 0x0000001c>
<eh aug data len 0x0>
0x0040da92: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040da93: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040da96: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dafd: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 181><0x0040dafe:0x0040dbcd><><cie offset 0x000016b4::cie index 1><fde offset 0x000016e0 length: 0x0000001c>
<eh aug data len 0x0>
0x0040dafe: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040daff: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040db02: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dbcc: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 182><0x0040dbcd:0x0040dc8b><><cie offset 0x000016d4::cie index 1><fde offset 0x00001700 length: 0x0000001c>
<eh aug data len 0x0>
0x0040dbcd: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040dbce: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dbd1: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dc8a: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 183><0x0040dc8b:0x0040dc99><><cie offset 0x000016f4::cie index 1><fde offset 0x00001720 length: 0x0000001c>
<eh aug data len 0x0>
0x0040dc8b: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040dc8c: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dc8f: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dc98: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 184><0x0040dc99:0x0040dce4><><cie offset 0x00001714::cie index 1><fde offset 0x00001740 length: 0x0000001c>
<eh aug data len 0x0>
0x0040dc99: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040dc9a: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dc9d: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dce3: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 185><0x0040dce4:0x0040dd6f><><cie offset 0x00001734::cie index 1><fde offset 0x00001760 length: 0x0000001c>
<eh aug data len 0x0>
0x0040dce4: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040dce5: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dce8: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dd6e: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 186><0x0040dd6f:0x0040ddb2><><cie offset 0x00001754::cie index 1><fde offset 0x00001780 length: 0x0000001c>
<eh aug data len 0x0>
0x0040dd6f: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040dd70: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dd73: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040ddb1: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 187><0x0040ddb2:0x0040ddc8><><cie offset 0x00001774::cie index 1><fde offset 0x000017a0 length: 0x0000001c>
<eh aug data len 0x0>
0x0040ddb2: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040ddb3: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040ddb6: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040ddc7: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 188><0x0040ddc8:0x0040ddee><><cie offset 0x00001794::cie index 1><fde offset 0x000017c0 length: 0x0000001c>
<eh aug data len 0x0>
0x0040ddc8: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040ddc9: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040ddcc: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040dded: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 189><0x0040ddee:0x0040de2b><><cie offset 0x000017b4::cie index 1><fde offset 0x000017e0 length: 0x0000001c>
<eh aug data len 0x0>
0x0040ddee: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040ddef: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040ddf2: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040de2a: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 190><0x0040de2b:0x0040e040><><cie offset 0x000017d4::cie index 1><fde offset 0x00001800 length: 0x00000024>
<eh aug data len 0x0>
0x0040de2b: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040de2c: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040de2f: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040de34: <off cfa=16(r6) > <off r3=-24(cfa) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e03f: <off cfa=08(r7) > <off r3=-24(cfa) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 191><0x0040e040:0x0040e058><><cie offset 0x000017fc::cie index 1><fde offset 0x00001828 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e040: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e041: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e044: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e057: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 192><0x0040e058:0x0040e0b7><><cie offset 0x0000181c::cie index 1><fde offset 0x00001848 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e058: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e059: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e05c: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e0b6: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 193><0x0040e0b7:0x0040e116><><cie offset 0x0000183c::cie index 1><fde offset 0x00001868 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e0b7: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e0b8: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e0bb: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e115: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 194><0x0040e116:0x0040e187><><cie offset 0x0000185c::cie index 1><fde offset 0x00001888 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e116: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e117: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e11a: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e186: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 195><0x0040e187:0x0040e202><><cie offset 0x0000187c::cie index 1><fde offset 0x000018a8 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e187: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e188: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e18b: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e201: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 196><0x0040e202:0x0040e27b><><cie offset 0x0000189c::cie index 1><fde offset 0x000018c8 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e202: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e203: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e206: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e27a: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 197><0x0040e27b:0x0040e301><><cie offset 0x000018bc::cie index 1><fde offset 0x000018e8 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e27b: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e27c: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e27f: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e300: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 198><0x0040e301:0x0040e3f6><><cie offset 0x000018dc::cie index 1><fde offset 0x00001908 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e301: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e302: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e305: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e3f5: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 199><0x0040e3f6:0x0040e41a><><cie offset 0x000018fc::cie index 1><fde offset 0x00001928 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e3f6: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e3f7: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e3fa: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e419: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 200><0x0040e41a:0x0040e50f><><cie offset 0x0000191c::cie index 1><fde offset 0x00001948 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e41a: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e41b: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e41e: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e50e: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 201><0x0040e50f:0x0040e51c><><cie offset 0x0000193c::cie index 1><fde offset 0x00001968 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e50f: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e510: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e513: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e51b: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 202><0x0040e51c:0x0040e5c9><><cie offset 0x0000195c::cie index 1><fde offset 0x00001988 length: 0x0000001c>
<eh aug data len 0x0>
0x0040e51c: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e51d: <off cfa=16(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e520: <off cfa=16(r6) > <off r6=-16(cfa) > <off r16=-8(cfa) >
0x0040e5c8: <off cfa=08(r7) > <off r6=-16(cfa) > <off r16=-8(cfa) >
< 203><0x0040e5d0:0x0040e635><><cie offset 0x0000197c::cie index 1><fde offset 0x000019a8 length: 0x00000044>
<eh aug data len 0x0>
0x0040e5d0: <off cfa=08(r7) > <off r16=-8(cfa) >
0x0040e5d2: <off cfa=16(r7) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e5d4: <off cfa=24(r7) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e5d9: <off cfa=32(r7) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e5db: <off cfa=40(r7) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e5e3: <off cfa=48(r7) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e5eb: <off cfa=56(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e5f8: <off cfa=64(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e62a: <off cfa=56(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e62b: <off cfa=48(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e62c: <off cfa=40(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e62e: <off cfa=32(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e630: <off cfa=24(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e632: <off cfa=16(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
0x0040e634: <off cfa=08(r7) > <off r3=-56(cfa) > <off r6=-48(cfa) > <off r12=-40(cfa) > <off r13=-32(cfa) > <off r14=-24(cfa) > <off r15=-16(cfa) > <off r16=-8(cfa) >
< 204><0x0040e640:0x0040e642><><cie offset 0x000019c4::cie index 1><fde offset 0x000019f0 length: 0x00000014>
<eh aug data len 0x0>
0x0040e640: <off cfa=08(r7) > <off r16=-8(cfa) >
cie:
< 0> version 1
cie section offset 0 0x00000000
augmentation zR
code_alignment_factor 1
data_alignment_factor -8
return_address_register 16
eh aug data len 0x1 bytes 0x1b
bytes of initial instructions 7
cie length 20
initial instructions
0 DW_CFA_def_cfa r7 8
3 DW_CFA_offset r16 -8
5 DW_CFA_undefined r16
< 1> version 1
cie section offset 48 0x00000030
augmentation zR
code_alignment_factor 1
data_alignment_factor -8
return_address_register 16
eh aug data len 0x1 bytes 0x1b
bytes of initial instructions 7
cie length 20
initial instructions
0 DW_CFA_def_cfa r7 8
3 DW_CFA_offset r16 -8
5 DW_CFA_nop
6 DW_CFA_nop
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-07 22:57 unknown error after dwarf_cfi_addrframe() Sasha Da Rocha Pinheiro
@ 2019-02-12 1:15 ` Sasha Da Rocha Pinheiro
2019-02-12 6:47 ` Mark Wielaard
0 siblings, 1 reply; 12+ messages in thread
From: Sasha Da Rocha Pinheiro @ 2019-02-12 1:15 UTC (permalink / raw)
To: elfutils-devel, Mark Wielaard, Ben Woodard
I found that when libdw will try to get the base CFI from the ABI, the function ebl_abi_cfi() ends calling default_abi_cfi() which returns -1, when should be calling x86_64_abi_cfi().
In addition, the symbol x86_64_abi_cfi in the file libdw.so is not present, but all the respective default_* ones are.
It seems that the library is being compiled using BACKEND as default and not catching the correct architecture (?).
Sasha
From: Sasha Da Rocha Pinheiro
Sent: Thursday, February 7, 2019 4:57 PM
To: elfutils-devel@sourceware.org; Mark Wielaard
Subject: unknown error after dwarf_cfi_addrframe()
Hi all,
I'm trying to read frame info from .eh_frame section. But I'm getting "unknown error".
I'll copy the snippet where I use libelf functions to print all sections of the file and get the index of .eh_frame, to then use libdw to go through .eh_frame Dwarf_CFI_Entry entries, to count them. The count matches was dwarfdump from libdwarf prints out. I'll attach that too.
Following I create a Dwarf_CFI and try to lock up an address with dwarf_cfi_addrframe(). But got unknown error.
I'll attach the binary too.
As you can see in the GDB output below that I try to get frame info for the address 0x40ae19, and the FDE with index 94 (see dwarfdump output) has addresses of <0x0040ae19:0x0040aed3>.
Regards,
Sasha
============ snippet for what I'm doing ==============
//testing printing count for CIE and FDE in this eh_frame
auto e_ident = elf_getident(dbg_eh_frame, NULL);
Elf_Scn *scn = NULL;
Elf64_Shdr *shdr;
char *section_name;
size_t eh_frame_index = -1, shstrndx;
if(elf_getshdrstrndx(dbg_eh_frame, &shstrndx)!=0)
fprintf(stderr, "elf_getshdrstrndx() failed: %s.", elf_errmsg(-1));
while((scn = elf_nextscn(dbg_eh_frame,scn))!=NULL)
{
if((shdr = elf64_getshdr(scn))!=shdr)
fprintf(stderr, "getshdr() failed: %s.\n", elf_errmsg(-1));
if((section_name = elf_strptr(dbg_eh_frame, shstrndx, shdr->sh_name))==NULL)
fprintf(stderr, "elf_strptr() failed: %s.\n", elf_errmsg(-1));
fprintf(stderr, "Section [%d]: %s\n", elf_ndxscn(scn), section_name);
if(strcmp(section_name, ".eh_frame")==0)
eh_frame_index = elf_ndxscn(scn);
}
assert(eh_frame_index!=-1);
scn = elf_getscn(dbg_eh_frame,eh_frame_index);
fprintf( stderr, "elf_getscn() failed: %s.\n", elf_errmsg(-1));
auto eh_frame_data = elf_getdata(scn, NULL);
fprintf( stderr, "elf_getdata() failed: %s.\n", elf_errmsg(-1));
assert(eh_frame_data!=NULL);
Dwarf_CFI_Entry entry;
Dwarf_Off offset = 0, next_offset, saved_cur_offset;
int res = 0, count_fde=0, count_cie=0;
do{
res = dwarf_next_cfi((const unsigned char *)e_ident, eh_frame_data,
true, offset, &next_offset, &entry);
saved_cur_offset = offset;
offset = next_offset;
if(res==1 && next_offset==(Dwarf_Off)-1) break;
if(res == -1) {
if (offset != saved_cur_offset) {
fprintf(stderr, "dwarf_next_cfi() returns -1. Error: %s\n", dwarf_errmsg(-1));
continue; // Soft error, skip to the next CFI entry
}
// Since offset didn't advance, we can't skip this CFI entry and need to quit
break;
}
if(dwarf_cfi_cie_p(&entry)) count_cie++;
else count_fde++;
}while(true);
cerr << "Count_cie: " << count_cie << endl;
cerr << "Count_fde: " << count_fde << endl;
Dwarf_CFI * cfi = nullptr;
cfi = dwarf_getcfi_elf(dbg_eh_frame);
if(!cfi) assert(false);
auto next_pc = range.first;
while(next_pc < range.second)
{
Dwarf_Frame * frame = NULL;
int result = dwarf_cfi_addrframe(cfi, next_pc, &frame);
fprintf( stderr, "dwarf_cfi_addrframe() failed: %s.\n", dwarf_errmsg(-1));
if(result==-1) break;
============ end of snippet ==============
GDB output:
Thread 1 "test_driver" hit Breakpoint 11, Dyninst::DwarfDyninst::DwarfFrameParser::getRegsForFunction (
this=0x1a70320, range=..., reg=..., locs=std::vector of length 0, capacity 0, err_result=@0x7fffffffd3fc: 32767)
at /<hidden-filepath>...Parser.C:162
162 {
(gdb) until 231
Section [1]: .interp
Section [2]: .note.ABI-tag
Section [3]: .note.gnu.build-id
Section [4]: .gnu.hash
Section [5]: .dynsym
Section [6]: .dynstr
Section [7]: .gnu.version
Section [8]: .gnu.version_r
Section [9]: .rela.dyn
Section [10]: .rela.plt
Section [11]: .init
Section [12]: .plt
Section [13]: .plt.got
Section [14]: .text
Section [15]: .fini
Section [16]: .rodata
Section [17]: .eh_frame_hdr
Section [18]: .eh_frame
Section [19]: .init_array
Section [20]: .fini_array
Section [21]: .jcr
Section [22]: .dynamic
Section [23]: .got
Section [24]: .got.plt
Section [25]: .data
Section [26]: .bss
Section [27]: .gnu_debuglink
Section [28]: .shstrtab
elf_getscn() failed: no error.
elf_getdata() failed: no error.
Count_cie: 2
Count_fde: 205
Dyninst::DwarfDyninst::DwarfFrameParser::getRegsForFunction (this=0x1a70320, range=..., reg=...,
locs=std::vector of length 0, capacity 0, err_result=@0x7fffffffd3fc: Dyninst::DwarfDyninst::FE_No_Error)
at /<hidden-filepath>...Parser.C:231
231 Dwarf_CFI * cfi = nullptr;
(gdb) n
232 cfi = dwarf_getcfi_elf(dbg_eh_frame);
(gdb)
233 if(!cfi) assert(false);
(gdb)
235 auto next_pc = range.first;
(gdb)
236 while(next_pc < range.second)
(gdb)
238 Dwarf_Frame * frame = NULL;
(gdb)
239 int result = dwarf_cfi_addrframe(cfi, next_pc, &frame);
(gdb)
240 fprintf( stderr, "dwarf_cfi_addrframe() failed: %s.\n", dwarf_errmsg(-1));
(gdb)
dwarf_cfi_addrframe() failed: unknown error.
241 if(result==-1) break;
(gdb) p/x next_pc
$73 = 0x40ae19
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-12 1:15 ` Sasha Da Rocha Pinheiro
@ 2019-02-12 6:47 ` Mark Wielaard
[not found] ` <BN6PR06MB293247BE5B8443B3E3EB967BA6650@BN6PR06MB2932.namprd06.prod.outlook.com>
0 siblings, 1 reply; 12+ messages in thread
From: Mark Wielaard @ 2019-02-12 6:47 UTC (permalink / raw)
To: Sasha Da Rocha Pinheiro; +Cc: elfutils-devel, Ben Woodard
On Tue, Feb 12, 2019 at 01:15:45AM +0000, Sasha Da Rocha Pinheiro wrote:
> I found that when libdw will try to get the base CFI from the ABI, the function ebl_abi_cfi() ends calling default_abi_cfi() which returns -1, when should be calling x86_64_abi_cfi().
> In addition, the symbol x86_64_abi_cfi in the file libdw.so is not present, but all the respective default_* ones are.
> It seems that the library is being compiled using BACKEND as default and not catching the correct architecture (?).
Maybe you are using an elfutils install in a non-default location?
The backends are loaded dynamically and it looks like they aren't found.
If you build and installed with e.g. --prefix=/opt/local/install/elfutils
Try setting the environment variable LD_LIBRARY_PATH to:
/opt/local/install/elfutils/lib:/opt/local/install/elfutils/lib/elfutils
The first contains the elfutils libraries libelf.so, libdw.so, etc.
The second contains the backends libebl_<arch>.so
> I'm trying to read frame info from .eh_frame section. But I'm getting "unknown error".
That is certainly an unhelpful error message. Sorry.
Cheers,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
[not found] ` <BN6PR06MB293247BE5B8443B3E3EB967BA6650@BN6PR06MB2932.namprd06.prod.outlook.com>
@ 2019-02-12 8:09 ` Mark Wielaard
2019-02-12 17:57 ` Sasha Da Rocha Pinheiro
0 siblings, 1 reply; 12+ messages in thread
From: Mark Wielaard @ 2019-02-12 8:09 UTC (permalink / raw)
To: Sasha Da Rocha Pinheiro; +Cc: elfutils-devel, Ben Woodard
On Tue, Feb 12, 2019 at 07:25:28AM +0000, Sasha Da Rocha Pinheiro wrote:
> Oh this is a whole new thing. How have this worked before without those .so? After downloading and compiling elfutils we only copy libdw and libelf.
The backends are only used for architecture specific ELF things.
Most of DWARF can be understood in an architecture independent way.
But CFI does have some arch specific things.
You should really use make install to get a proper installation,
not just copy some files. Otherwise you might indeed miss the
backends, or translations, etc.
Cheers,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-12 8:09 ` Mark Wielaard
@ 2019-02-12 17:57 ` Sasha Da Rocha Pinheiro
2019-02-12 18:39 ` Ben Woodard
2019-02-12 18:41 ` Sasha Da Rocha Pinheiro
0 siblings, 2 replies; 12+ messages in thread
From: Sasha Da Rocha Pinheiro @ 2019-02-12 17:57 UTC (permalink / raw)
To: Mark Wielaard; +Cc: elfutils-devel, Ben Woodard
Not working even after adding the directory to libebl_*.so to LD_LIBRARY_PATH.
default_abi_cfi is still called returning -1.
Sasha
From: Mark Wielaard <mark@klomp.org>
Sent: Tuesday, February 12, 2019 2:09 AM
To: Sasha Da Rocha Pinheiro
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
On Tue, Feb 12, 2019 at 07:25:28AM +0000, Sasha Da Rocha Pinheiro wrote:
> Oh this is a whole new thing. How have this worked before without those .so? After downloading and compiling elfutils we only copy libdw and libelf.
The backends are only used for architecture specific ELF things.
Most of DWARF can be understood in an architecture independent way.
But CFI does have some arch specific things.
You should really use make install to get a proper installation,
not just copy some files. Otherwise you might indeed miss the
backends, or translations, etc.
Cheers,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-12 17:57 ` Sasha Da Rocha Pinheiro
@ 2019-02-12 18:39 ` Ben Woodard
2019-02-12 18:43 ` Sasha Da Rocha Pinheiro
2019-02-12 18:41 ` Sasha Da Rocha Pinheiro
1 sibling, 1 reply; 12+ messages in thread
From: Ben Woodard @ 2019-02-12 18:39 UTC (permalink / raw)
To: Sasha Da Rocha Pinheiro; +Cc: Mark Wielaard, elfutils-devel
Does it work at all if you use the standard RH installed version of elfutils?
-ben
> On Feb 12, 2019, at 9:57 AM, Sasha Da Rocha Pinheiro <darochapinhe@wisc.edu> wrote:
>
> Not working even after adding the directory to libebl_*.so to LD_LIBRARY_PATH.
> default_abi_cfi is still called returning -1.
>
> Sasha
>
>
>
> From: Mark Wielaard <mark@klomp.org>
> Sent: Tuesday, February 12, 2019 2:09 AM
> To: Sasha Da Rocha Pinheiro
> Cc: elfutils-devel@sourceware.org; Ben Woodard
> Subject: Re: unknown error after dwarf_cfi_addrframe()
>
> On Tue, Feb 12, 2019 at 07:25:28AM +0000, Sasha Da Rocha Pinheiro wrote:
>> Oh this is a whole new thing. How have this worked before without those .so? After downloading and compiling elfutils we only copy libdw and libelf.
>
> The backends are only used for architecture specific ELF things.
> Most of DWARF can be understood in an architecture independent way.
> But CFI does have some arch specific things.
>
> You should really use make install to get a proper installation,
> not just copy some files. Otherwise you might indeed miss the
> backends, or translations, etc.
>
> Cheers,
>
> Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-12 17:57 ` Sasha Da Rocha Pinheiro
2019-02-12 18:39 ` Ben Woodard
@ 2019-02-12 18:41 ` Sasha Da Rocha Pinheiro
[not found] ` <BN6PR06MB29322B835ECA93DFEEA81C2AA6650@BN6PR06MB2932.namprd06.prod.outlook.com>
1 sibling, 1 reply; 12+ messages in thread
From: Sasha Da Rocha Pinheiro @ 2019-02-12 18:41 UTC (permalink / raw)
To: Mark Wielaard; +Cc: elfutils-devel, Ben Woodard
Below I copy gdb execution from eblopenbackend.c trying to dlopen a dsoname "libebl_x86_64.so".
After that it will try to open again, which find something, but culminates to closing it with (void) dlclose (h);
(gdb) n
328 void *h = dlopen (dsoname, RTLD_LAZY);
(gdb) p dsonmae
No symbol "dsonmae" in current context.
(gdb) p dsoname
$97 = "$ORIGIN/../$LIB/elfutils/libebl_x86_64.so\000\242\001\000\000\000\000\300\317\377\377\377\177\000\000\240N\242\001\000\000\000\000\220\317\377\377\377\177\000\000U\236o\357\377\177\000\000\300\317\377\377\377\177\000\000\240N\242\001\000\000\000\000\000\000\000"
(gdb) show environment $ORIGIN
Environment variable "$ORIGIN" not defined.
(gdb) show environment $LIB
Environment variable "$LIB" not defined.
(gdb) n
329 if (h == NULL)
(gdb) p h
$98 = (void *) 0x0
(gdb) show environment LD_LIBRARY_PATH
LD_LIBRARY_PATH = /p/paradyn/development/sasha/local/lib/elfutils/:/p/paradyn/development/sasha/local/lib/:/p/paradyn/packages/libdwarf/lib:.
(gdb) ls /p/paradyn/development/sasha/local/lib/elfutils/
Undefined command: "ls". Try "help".
(gdb) shell
[sasha@zatar] (1)$ ls /p/paradyn/development/sasha/local/lib/elfutils/
libebl_aarch64-0.175.so* libebl_i386-0.175.so* libebl_ppc64.so@ libebl_sparc-0.175.so*
libebl_aarch64.so@ libebl_i386.so@ libebl_ppc.so@ libebl_sparc.so@
libebl_alpha-0.175.so* libebl_ia64-0.175.so* libebl_riscv-0.175.so* libebl_tilegx-0.175.so*
libebl_alpha.so@ libebl_ia64.so@ libebl_riscv.so@ libebl_tilegx.so@
libebl_arm-0.175.so* libebl_m68k-0.175.so* libebl_s390-0.175.so* libebl_x86_64-0.175.so*
libebl_arm.so@ libebl_m68k.so@ libebl_s390.so@ libebl_x86_64.so@
libebl_bpf-0.175.so* libebl_ppc-0.175.so* libebl_sh-0.175.so*
libebl_bpf.so@ libebl_ppc64-0.175.so* libebl_sh.so@
[sasha@zatar] (2)$ exit
exit
(gdb) frame
#0 openbackend (elf=0x1a24ea0, emulation=0x0, machine=62)
at /p/paradyn/development/sasha/dyninst/build.dir/elfutils/src/LibElf/libebl/eblopenbackend.c:329
329 if (h == NULL)
(gdb)
From: Sasha Da Rocha Pinheiro
Sent: Tuesday, February 12, 2019 11:57 AM
To: Mark Wielaard
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
Not working even after adding the directory to libebl_*.so to LD_LIBRARY_PATH.
default_abi_cfi is still called returning -1.
Sasha
From: Mark Wielaard <mark@klomp.org>
Sent: Tuesday, February 12, 2019 2:09 AM
To: Sasha Da Rocha Pinheiro
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
On Tue, Feb 12, 2019 at 07:25:28AM +0000, Sasha Da Rocha Pinheiro wrote:
> Oh this is a whole new thing. How have this worked before without those .so? After downloading and compiling elfutils we only copy libdw and libelf.
The backends are only used for architecture specific ELF things.
Most of DWARF can be understood in an architecture independent way.
But CFI does have some arch specific things.
You should really use make install to get a proper installation,
not just copy some files. Otherwise you might indeed miss the
backends, or translations, etc.
Cheers,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-12 18:39 ` Ben Woodard
@ 2019-02-12 18:43 ` Sasha Da Rocha Pinheiro
0 siblings, 0 replies; 12+ messages in thread
From: Sasha Da Rocha Pinheiro @ 2019-02-12 18:43 UTC (permalink / raw)
To: Ben Woodard; +Cc: Mark Wielaard, elfutils-devel
No, because we need at least 0.173 and the system version is 0.165.
From: Ben Woodard <woodard@redhat.com>
Sent: Tuesday, February 12, 2019 12:39 PM
To: Sasha Da Rocha Pinheiro
Cc: Mark Wielaard; elfutils-devel@sourceware.org
Subject: Re: unknown error after dwarf_cfi_addrframe()
Does it work at all if you use the standard RH installed version of elfutils?
-ben
> On Feb 12, 2019, at 9:57 AM, Sasha Da Rocha Pinheiro <darochapinhe@wisc.edu> wrote:
>
> Not working even after adding the directory to libebl_*.so to LD_LIBRARY_PATH.
> default_abi_cfi is still called returning -1.
>
> Sasha
>
>
>
> From: Mark Wielaard <mark@klomp.org>
> Sent: Tuesday, February 12, 2019 2:09 AM
> To: Sasha Da Rocha Pinheiro
> Cc: elfutils-devel@sourceware.org; Ben Woodard
> Subject: Re: unknown error after dwarf_cfi_addrframe()
>
> On Tue, Feb 12, 2019 at 07:25:28AM +0000, Sasha Da Rocha Pinheiro wrote:
>> Oh this is a whole new thing. How have this worked before without those .so? After downloading and compiling elfutils we only copy libdw and libelf.
>
> The backends are only used for architecture specific ELF things.
> Most of DWARF can be understood in an architecture independent way.
> But CFI does have some arch specific things.
>
> You should really use make install to get a proper installation,
> not just copy some files. Otherwise you might indeed miss the
> backends, or translations, etc.
>
> Cheers,
>
> Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
[not found] ` <BN6PR06MB29322B835ECA93DFEEA81C2AA6650@BN6PR06MB2932.namprd06.prod.outlook.com>
@ 2019-02-12 19:47 ` Sasha Da Rocha Pinheiro
2019-02-12 20:58 ` Mark Wielaard
2019-02-12 20:42 ` Mark Wielaard
1 sibling, 1 reply; 12+ messages in thread
From: Sasha Da Rocha Pinheiro @ 2019-02-12 19:47 UTC (permalink / raw)
To: Mark Wielaard; +Cc: elfutils-devel, Ben Woodard
I was using elfutils version 0.175, since we download the lastest.
But after moving back to 0.173, this problem disappeared. So, some update after 0.173 broke this.
Sasha
From: Sasha Da Rocha Pinheiro
Sent: Tuesday, February 12, 2019 12:49 PM
To: Mark Wielaard
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
Since the openbackend() tries to dlopen twice, and in the second turn it succeeds opening one libebl_x86_64.so, I even tried to redirect that symbolic link to a newer version of libebl_x86_64-0.165.so, as seen below.
(gdb) shell
[sasha@zatar] (1)$ locate libebl
/usr/lib/x86_64-linux-gnu/elfutils/libebl_aarch64-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_aarch64.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_alpha-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_alpha.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_arm-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_arm.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_i386-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_i386.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_ia64-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_ia64.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_m68k-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_m68k.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_mips-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_mips.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_parisc-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_parisc.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_ppc-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_ppc.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_ppc64-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_ppc64.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_s390-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_s390.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_sh-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_sh.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_sparc-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_sparc.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_tilegx-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_tilegx.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_x86_64-0.165.so
/usr/lib/x86_64-linux-gnu/elfutils/libebl_x86_64.so
[sasha@zatar] (2)$ ls -la /usr/lib/x86_64-linux-gnu/elfutils/libebl_x86_64.so
lrwxrwxrwx 1 root root 70 Feb 12 12:25 /usr/lib/x86_64-linux-gnu/elfutils/libebl_x86_64.so -> /p/paradyn/development/sasha/local/lib/elfutils/libebl_x86_64-0.175.so*
[sasha@zatar] (3)$
Sasha
From: Sasha Da Rocha Pinheiro
Sent: Tuesday, February 12, 2019 12:41 PM
To: Mark Wielaard
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
Below I copy gdb execution from eblopenbackend.c trying to dlopen a dsoname "libebl_x86_64.so".
After that it will try to open again, which find something, but culminates to closing it with (void) dlclose (h);
(gdb) n
328 void *h = dlopen (dsoname, RTLD_LAZY);
(gdb) p dsonmae
No symbol "dsonmae" in current context.
(gdb) p dsoname
$97 = "$ORIGIN/../$LIB/elfutils/libebl_x86_64.so\000\242\001\000\000\000\000\300\317\377\377\377\177\000\000\240N\242\001\000\000\000\000\220\317\377\377\377\177\000\000U\236o\357\377\177\000\000\300\317\377\377\377\177\000\000\240N\242\001\000\000\000\000\000\000\000"
(gdb) show environment $ORIGIN
Environment variable "$ORIGIN" not defined.
(gdb) show environment $LIB
Environment variable "$LIB" not defined.
(gdb) n
329 if (h == NULL)
(gdb) p h
$98 = (void *) 0x0
(gdb) show environment LD_LIBRARY_PATH
LD_LIBRARY_PATH = /p/paradyn/development/sasha/local/lib/elfutils/:/p/paradyn/development/sasha/local/lib/:/p/paradyn/packages/libdwarf/lib:.
(gdb) ls /p/paradyn/development/sasha/local/lib/elfutils/
Undefined command: "ls". Try "help".
(gdb) shell
[sasha@zatar] (1)$ ls /p/paradyn/development/sasha/local/lib/elfutils/
libebl_aarch64-0.175.so* libebl_i386-0.175.so* libebl_ppc64.so@ libebl_sparc-0.175.so*
libebl_aarch64.so@ libebl_i386.so@ libebl_ppc.so@ libebl_sparc.so@
libebl_alpha-0.175.so* libebl_ia64-0.175.so* libebl_riscv-0.175.so* libebl_tilegx-0.175.so*
libebl_alpha.so@ libebl_ia64.so@ libebl_riscv.so@ libebl_tilegx.so@
libebl_arm-0.175.so* libebl_m68k-0.175.so* libebl_s390-0.175.so* libebl_x86_64-0.175.so*
libebl_arm.so@ libebl_m68k.so@ libebl_s390.so@ libebl_x86_64.so@
libebl_bpf-0.175.so* libebl_ppc-0.175.so* libebl_sh-0.175.so*
libebl_bpf.so@ libebl_ppc64-0.175.so* libebl_sh.so@
[sasha@zatar] (2)$ exit
exit
(gdb) frame
#0 openbackend (elf=0x1a24ea0, emulation=0x0, machine=62)
at /p/paradyn/development/sasha/dyninst/build.dir/elfutils/src/LibElf/libebl/eblopenbackend.c:329
329 if (h == NULL)
(gdb)
From: Sasha Da Rocha Pinheiro
Sent: Tuesday, February 12, 2019 11:57 AM
To: Mark Wielaard
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
Not working even after adding the directory to libebl_*.so to LD_LIBRARY_PATH.
default_abi_cfi is still called returning -1.
Sasha
From: Mark Wielaard <mark@klomp.org>
Sent: Tuesday, February 12, 2019 2:09 AM
To: Sasha Da Rocha Pinheiro
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
On Tue, Feb 12, 2019 at 07:25:28AM +0000, Sasha Da Rocha Pinheiro wrote:
> Oh this is a whole new thing. How have this worked before without those .so? After downloading and compiling elfutils we only copy libdw and libelf.
The backends are only used for architecture specific ELF things.
Most of DWARF can be understood in an architecture independent way.
But CFI does have some arch specific things.
You should really use make install to get a proper installation,
not just copy some files. Otherwise you might indeed miss the
backends, or translations, etc.
Cheers,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
[not found] ` <BN6PR06MB29322B835ECA93DFEEA81C2AA6650@BN6PR06MB2932.namprd06.prod.outlook.com>
2019-02-12 19:47 ` Sasha Da Rocha Pinheiro
@ 2019-02-12 20:42 ` Mark Wielaard
1 sibling, 0 replies; 12+ messages in thread
From: Mark Wielaard @ 2019-02-12 20:42 UTC (permalink / raw)
To: Sasha Da Rocha Pinheiro; +Cc: elfutils-devel, Ben Woodard
On Tue, Feb 12, 2019 at 06:49:54PM +0000, Sasha Da Rocha Pinheiro wrote:
> Since the openbackend() tries to dlopen twice, and in the second turn
> it succeeds opening one libebl_x86_64.so, I even tried to redirect that
> symbolic link to a newer version of libebl_x86_64-0.165.so, as seen
> below.
That won't work. The backends are version specific.
That might explain why you see the backend library be opened
and then closed. eblopenbackend will do that if the backend
init function returns the wrong version.
See also the following in NOTES:
- the ABI of the backend modules is not guaranteed. Really, no guarantee
whatsoever. We are enforcing this in the code. The modules and their
users must match. No third-party EBL module are supported or allowed.
The only reason there are separate modules is to not have the code for
all architectures in all the binaries.
> LD_LIBRARY_PATH = /p/paradyn/development/sasha/local/lib/elfutils/:/p/paradyn/development/sasha/local/lib/:/p/paradyn/packages/libdwarf/lib:.
So assuming you configure with
--prefix=/p/paradyn/development/sasha/local and ran make install
Then the following should both return
"Build for elfutils 175 x86_64-pc-linux-gnu"
eu-strings /p/paradyn/development/sasha/local/lib/libdw.so | grep ^Build
eu-strings /p/paradyn/development/sasha/local/lib/elfutils/libebl_x86_64.so \
| grep ^Build
Hope that helps,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-12 19:47 ` Sasha Da Rocha Pinheiro
@ 2019-02-12 20:58 ` Mark Wielaard
2019-02-12 21:39 ` Sasha Da Rocha Pinheiro
0 siblings, 1 reply; 12+ messages in thread
From: Mark Wielaard @ 2019-02-12 20:58 UTC (permalink / raw)
To: Sasha Da Rocha Pinheiro; +Cc: elfutils-devel, Ben Woodard
On Tue, Feb 12, 2019 at 07:47:06PM +0000, Sasha Da Rocha Pinheiro wrote:
> I was using elfutils version 0.175, since we download the lastest.
> But after moving back to 0.173, this problem disappeared. So, some
> update after 0.173 broke this.
That is surprising. Are you sure you configured, build and installed
to the correct directory and that you have this added to
LD_LIBRARY_PATH? It certainly seems to work here.
If you do the following, does that work?
$ ./configure --prefix=/tmp/elfutils
$ make && make install
$ LD_LIBRARY_PATH=/tmp/elfutils/lib:/tmp/elfutils/lib/elfutils \
/tmp/elfutils/bin/eu-readelf --relocs /bin/true
Since relocations are arch specific, if it cannot find the x86_64
backend it will show <INVALID RELOC>, otherwise it will print the
correct relocation names.
Cheers,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: unknown error after dwarf_cfi_addrframe()
2019-02-12 20:58 ` Mark Wielaard
@ 2019-02-12 21:39 ` Sasha Da Rocha Pinheiro
0 siblings, 0 replies; 12+ messages in thread
From: Sasha Da Rocha Pinheiro @ 2019-02-12 21:39 UTC (permalink / raw)
To: Mark Wielaard; +Cc: elfutils-devel, Ben Woodard
I built again in another folder, version .0175, and added that to LD_LIBRARY_PATH. And it seems to work fine.
Somehow the version we build with Dyninst cmake is not working.
Thanks
Sasha
From: Mark Wielaard <mark@klomp.org>
Sent: Tuesday, February 12, 2019 2:57 PM
To: Sasha Da Rocha Pinheiro
Cc: elfutils-devel@sourceware.org; Ben Woodard
Subject: Re: unknown error after dwarf_cfi_addrframe()
On Tue, Feb 12, 2019 at 07:47:06PM +0000, Sasha Da Rocha Pinheiro wrote:
> I was using elfutils version 0.175, since we download the lastest.
> But after moving back to 0.173, this problem disappeared. So, some
> update after 0.173 broke this.
That is surprising. Are you sure you configured, build and installed
to the correct directory and that you have this added to
LD_LIBRARY_PATH? It certainly seems to work here.
If you do the following, does that work?
$ ./configure --prefix=/tmp/elfutils
$ make && make install
$ LD_LIBRARY_PATH=/tmp/elfutils/lib:/tmp/elfutils/lib/elfutils \
/tmp/elfutils/bin/eu-readelf --relocs /bin/true
Since relocations are arch specific, if it cannot find the x86_64
backend it will show <INVALID RELOC>, otherwise it will print the
correct relocation names.
Cheers,
Mark
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2019-02-12 21:39 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-07 22:57 unknown error after dwarf_cfi_addrframe() Sasha Da Rocha Pinheiro
2019-02-12 1:15 ` Sasha Da Rocha Pinheiro
2019-02-12 6:47 ` Mark Wielaard
[not found] ` <BN6PR06MB293247BE5B8443B3E3EB967BA6650@BN6PR06MB2932.namprd06.prod.outlook.com>
2019-02-12 8:09 ` Mark Wielaard
2019-02-12 17:57 ` Sasha Da Rocha Pinheiro
2019-02-12 18:39 ` Ben Woodard
2019-02-12 18:43 ` Sasha Da Rocha Pinheiro
2019-02-12 18:41 ` Sasha Da Rocha Pinheiro
[not found] ` <BN6PR06MB29322B835ECA93DFEEA81C2AA6650@BN6PR06MB2932.namprd06.prod.outlook.com>
2019-02-12 19:47 ` Sasha Da Rocha Pinheiro
2019-02-12 20:58 ` Mark Wielaard
2019-02-12 21:39 ` Sasha Da Rocha Pinheiro
2019-02-12 20:42 ` Mark Wielaard
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