[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873 --- Comment #5 from Di Chen --- Created attachment 14600 --> https://sourceware.org/bugzilla/attachment.cgi?id=14600&action=edit readelf: display dynamic symtab without section headers ``` # failed to print symtab of a binary which has section headers removed. $ ./src/readelf -s ~/test/a.out # it works with "-D" for a binary which has section headers removed. $ ./src/readelf -Ds ~/test/a.out 0: 0 NOTYPE LOCAL DEFAULTUNDEF 1: 0 FUNCGLOBAL DEFAULTUNDEF __libc_start_main@GLIBC_2.34 (2) 2: 0 NOTYPE WEAK DEFAULTUNDEF __gmon_start__ ``` It works well for binaries which has SYMTAB section right after STRTAB section. ``` $ readelf -Dd ~/test/a.out Dynamic section at offset 0x2e60 contains 20 entries: TagType Name/Value 0x0001 (NEEDED) Shared library: [libc.so.6] 0x000c (INIT) 0x401000 0x000d (FINI) 0x401124 0x0019 (INIT_ARRAY) 0x403e50 0x001b (INIT_ARRAYSZ) 8 (bytes) 0x001a (FINI_ARRAY) 0x403e58 0x001c (FINI_ARRAYSZ) 8 (bytes) 0x6ef5 (GNU_HASH) 0x4003c0 0x0005 (STRTAB) 0x400428 0x0006 (SYMTAB) 0x4003e0 0x000a (STRSZ) 55 (bytes) 0x000b (SYMENT) 24 (bytes) 0x0015 (DEBUG) 0x0 0x0007 (RELA) 0x400488 0x0008 (RELASZ) 48 (bytes) 0x0009 (RELAENT)24 (bytes) 0x6ffe (VERNEED)0x400468 0x6fff (VERNEEDNUM) 1 0x6ff0 (VERSYM) 0x400460 0x (NULL) 0x0 ``` Because I use offset difference between SYMTAB and STRTAB to get the symbol table entry number. ``` size_t syments = ((offs[i_strtab] - offs[i_symtab]) / gelf_fsize(ebl->elf, ELF_T_SYM, 1, EV_CURRENT)); ``` -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873 --- Comment #6 from Di Chen --- [Follow the last comment] For a binary with SYMTAB STRTAB having different order, like upside down, or having other section in between. eg. ``` $ readelf -Dd /usr/local/go/bin/go Dynamic section at offset 0x9e5220 contains 19 entries: TagType Name/Value 0x0004 (HASH) 0xb3c3c0 0x0006 (SYMTAB) 0xb3c880 0x000b (SYMENT) 24 (bytes) 0x0005 (STRTAB) 0xb3c660 0x000a (STRSZ) 531 (bytes) 0x0007 (RELA) 0xb3bfd8 0x0008 (RELASZ) 24 (bytes) 0x0009 (RELAENT)24 (bytes) 0x0003 (PLTGOT) 0xde5100 0x0015 (DEBUG) 0x0 0x0001 (NEEDED) Shared library: [libpthread.so.0] 0x0001 (NEEDED) Shared library: [libc.so.6] 0x6ffe (VERNEED)0xb3c360 0x6fff (VERNEEDNUM) 2 0x6ff0 (VERSYM) 0xb3c300 0x0014 (PLTREL) RELA 0x0002 (PLTRELSZ) 768 (bytes) 0x0017 (JMPREL) 0xb3bff0 0x (NULL) 0x0 ``` It will mess up the syments (symbol table entry number) calculation. -- You are receiving this mail because: You are on the CC list for the bug.
[Bug debuginfod/27918] add control file for triggered traversal
https://sourceware.org/bugzilla/show_bug.cgi?id=27918 Di Chen changed: What|Removed |Added CC||dichen at redhat dot com Assignee|unassigned at sourceware dot org |dichen at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug.
[Bug debuginfod/27918] add control file for triggered traversal
https://sourceware.org/bugzilla/show_bug.cgi?id=27918 Di Chen changed: What|Removed |Added Assignee|dichen at redhat dot com |unassigned at sourceware dot org -- You are receiving this mail because: You are on the CC list for the bug.
[Bug debuginfod/27917] protect against federation loops
https://sourceware.org/bugzilla/show_bug.cgi?id=27917 Di Chen changed: What|Removed |Added Assignee|unassigned at sourceware dot org |dichen at redhat dot com CC||dichen at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug.
[Bug debuginfod/27917] protect against federation loops
https://sourceware.org/bugzilla/show_bug.cgi?id=27917 --- Comment #2 from Di Chen --- Created attachment 13623 --> https://sourceware.org/bugzilla/attachment.cgi?id=13623&action=edit Submit a Patch for Bug 27917 -- You are receiving this mail because: You are on the CC list for the bug.
[Bug debuginfod/28242] extend server http-response metrics with result code
https://sourceware.org/bugzilla/show_bug.cgi?id=28242 Di Chen changed: What|Removed |Added CC||dichen at redhat dot com Assignee|unassigned at sourceware dot org |dichen at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug.
[Bug debuginfod/28242] extend server http-response metrics with result code
https://sourceware.org/bugzilla/show_bug.cgi?id=28242
--- Comment #1 from Di Chen ---
Specifically, this task aims to add another label to all the http_responses_*
metrics.
And they are expecting to be like this:
http_responses_duration_milliseconds_count{code="200", type="debuginfo"} 91300.
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[Bug debuginfod/28242] extend server http-response metrics with artifact-type content
https://sourceware.org/bugzilla/show_bug.cgi?id=28242 Di Chen changed: What|Removed |Added Summary|extend server http-response |extend server http-response |metrics with result code|metrics with artifact-type ||content -- You are receiving this mail because: You are on the CC list for the bug.
[Bug libdw/28579] libdwfl api for accessing registers for a thread frame (full register unwinding)
https://sourceware.org/bugzilla/show_bug.cgi?id=28579 Di Chen changed: What|Removed |Added CC||dichen at redhat dot com Assignee|unassigned at sourceware dot org |dichen at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug.
[Bug libdw/28579] libdwfl api for accessing registers for a thread frame (full register unwinding)
https://sourceware.org/bugzilla/show_bug.cgi?id=28579 Di Chen changed: What|Removed |Added Status|NEW |ASSIGNED -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] New: Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873
Bug ID: 28873
Summary: Implement eu-readelf -D
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: tools
Assignee: unassigned at sourceware dot org
Reporter: dichen at redhat dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Currently, eu-readelf is using section headers (in readelf.c:handle_symtab(),
it calls gelf_getshdr() for fetching section headers and get related info like
section size, type, etc) to find the symbol information and print them.
This task will add new options to eu-readelf (-D and --use-dynamic).
And this task aims for printing the symbols by lookup through the program
headers
and the dynamic table. PT_DYNAMIC->DT_* for DT_{GNU_,}HASH, DT_SYMTAB,
DT_STRSZ,
DT_VERNEED, DT_VERSYM(for version information), etc.
previous discussion: https://bugzilla.redhat.com/show_bug.cgi?id=444621
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[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873 Di Chen changed: What|Removed |Added Status|NEW |ASSIGNED -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873 Di Chen changed: What|Removed |Added Assignee|unassigned at sourceware dot org |dichen at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28928] New: Wrong dynamic section entry number
https://sourceware.org/bugzilla/show_bug.cgi?id=28928
Bug ID: 28928
Summary: Wrong dynamic section entry number
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: tools
Assignee: unassigned at sourceware dot org
Reporter: dichen at redhat dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
when using `$ eu-readelf -d {file}` to get the number of dynamic section
entris,
It wrongly counts the padding DT_NULLs as dynamic section entries.
However, DT_NULL Marks end of dynamic section. They should not be counted as
dynamic section entries.
```
$ eu-readelf -d /usr/local/bin/eu-readelf
Dynamic segment contains 31 entries:
Addr: 0x00474e00 Offset: 0x073e00 Link to section: [ 7] '.dynstr'
Type Value
NEEDEDShared library: [libdw.so.1]
NEEDEDShared library: [libelf.so.1]
NEEDEDShared library: [libc.so.6]
INIT 0x00404000
FINI 0x0043d4a8
INIT_ARRAY0x00474df0
INIT_ARRAYSZ 8 (bytes)
FINI_ARRAY0x00474df8
FINI_ARRAYSZ 8 (bytes)
GNU_HASH 0x004003a0
STRTAB0x004016b0
SYMTAB0x004003f0
STRSZ 3086 (bytes)
SYMENT24 (bytes)
DEBUG
PLTGOT0x00475000
PLTRELSZ 4560 (bytes)
PLTRELRELA
JMPREL0x004026a0
RELA 0x00402610
RELASZ144 (bytes)
RELAENT 24 (bytes)
VERNEED 0x00402450
VERNEEDNUM3
VERSYM0x004022be
NULL
NULL
NULL
NULL
NULL
NULL
```
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[Bug tools/28928] Wrong dynamic section entry number
https://sourceware.org/bugzilla/show_bug.cgi?id=28928 Di Chen changed: What|Removed |Added Assignee|unassigned at sourceware dot org |dichen at redhat dot com Status|NEW |ASSIGNED -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28928] Wrong dynamic section entry number
https://sourceware.org/bugzilla/show_bug.cgi?id=28928
Di Chen changed:
What|Removed |Added
CC||dichen at redhat dot com
--- Comment #1 from Di Chen ---
Created attachment 14042
--> https://sourceware.org/bugzilla/attachment.cgi?id=14042&action=edit
[PATCH] readelf: Don't consider padding DT_NULL as dynamic section
when using `$ eu-readelf -d {FILE}` to get the number of dynamic
section entris, it wrongly counts the padding DT_NULLs as dynamic
section entries. However, DT_NULL Marks end of dynamic section.
They should not be considered as dynamic section entries.
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[Bug tools/28928] Wrong dynamic section entry number
https://sourceware.org/bugzilla/show_bug.cgi?id=28928 Di Chen changed: What|Removed |Added Blocks||28873 Referenced Bugs: https://sourceware.org/bugzilla/show_bug.cgi?id=28873 [Bug 28873] Implement eu-readelf -D -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873 Di Chen changed: What|Removed |Added Depends on||28928 Referenced Bugs: https://sourceware.org/bugzilla/show_bug.cgi?id=28928 [Bug 28928] Wrong dynamic section entry number -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873
--- Comment #1 from Di Chen ---
This Bug depends on Bug 28928 because when calling
`$ eu-readelf -d --use-dynamic {FILE}`
eu-readelf will need the number of dynamic section entris which involves with
Bug 28928
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[Bug tools/28928] Wrong dynamic section entry number
https://sourceware.org/bugzilla/show_bug.cgi?id=28928 --- Comment #3 from Di Chen --- Thanks Mark, attachment 14064 looks good to me. You are right, we should let patch for "-d --use-dynamic" (part of Bug 28873) take care of using phdr(PT_DYNAMIC) to get the section data. Because I was considering "-d --use-dynamic", so I mixed this fix with dynamic phdr -> section data, I agree with using section data directly for this fix. -- You are receiving this mail because: You are on the CC list for the bug.
[Bug libdw/28579] libdwfl api for accessing registers for a thread frame (full register unwinding)
https://sourceware.org/bugzilla/show_bug.cgi?id=28579 --- Comment #1 from Di Chen --- Created attachment 14193 --> https://sourceware.org/bugzilla/attachment.cgi?id=14193&action=edit Submit a Patch for Bug 28579 -- You are receiving this mail because: You are on the CC list for the bug.
[Bug libdw/28579] libdwfl api for accessing registers for a thread frame (full register unwinding)
https://sourceware.org/bugzilla/show_bug.cgi?id=28579 --- Comment #3 from Di Chen --- Thank you Mark, I have re-pushed a patch[1] for 1). add dwfl_frame_reg to ELFUTILS_0.188 2). add invalid regno check for dwfl_frame_reg 3). add INTDECL (dwfl_frame_reg) 4). Replace Dwarf_Word with Dwarf_Addr for *val [1] https://sourceware.org/pipermail/elfutils-devel/2022q3/005206.html -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873 --- Comment #2 from Di Chen --- commit 369c021c6eedae3665c1dbbaa4fc43afbbb698f4 Author: Di Chen Date: Thu Apr 28 19:55:33 2022 +0800 readelf: Support --dynamic with --use-dynamic Currently, eu-readelf is using section headers to dump the dynamic segment information (print_dynamic -> handle_dynamic). This patch adds new options to eu-readelf (-D, --use-dynamic) for (-d, --dynamic). https://sourceware.org/bugzilla/show_bug.cgi?id=28873 Signed-off-by: Di Chen -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873 --- Comment #3 from Di Chen --- Finished the first part of the whole task, now eu-readelf can dump the dynamic segment information from dynamic program header, i.e. ``` $ ./src/readelf -Dd ~/test/eu-readelf-no-shdr Dynamic segment contains 26 entries: Addr: 0x00474e00 Offset: 0x073e00 Type Value NEEDEDShared library: [libdw.so.1] NEEDEDShared library: [libelf.so.1] NEEDEDShared library: [libc.so.6] INIT 0x00404000 FINI 0x0043d4a8 INIT_ARRAY0x00474df0 INIT_ARRAYSZ 8 (bytes) FINI_ARRAY0x00474df8 FINI_ARRAYSZ 8 (bytes) GNU_HASH 0x004003a0 STRTAB0x004016b0 SYMTAB0x004003f0 STRSZ 3086 (bytes) SYMENT24 (bytes) DEBUG PLTGOT0x00475000 PLTRELSZ 4560 (bytes) PLTRELRELA JMPREL0x004026a0 RELA 0x00402610 RELASZ144 (bytes) RELAENT 24 (bytes) VERNEED 0x00402450 VERNEEDNUM3 VERSYM0x004022be NULL ``` -- You are receiving this mail because: You are on the CC list for the bug.
[Bug tools/28873] Implement eu-readelf -D
https://sourceware.org/bugzilla/show_bug.cgi?id=28873
--- Comment #4 from Di Chen ---
Update:
I am working on the second part of the task, make eu-readelf can dump symbol
information from dynamic program header, like $ eu-readelf -Ds {FILE}
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