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pahole: Prep 1.20
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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‎CMakeLists.txt

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@@ -33,9 +33,9 @@ set(CMAKE_C_FLAGS_DEBUG "-Wall -Werror -ggdb -O0")
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set(CMAKE_C_FLAGS_RELEASE "-Wall -O2")
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# Just for grepping, DWARVES_VERSION isn't used anywhere anymore
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# add_definitions(-D_GNU_SOURCE -DDWARVES_VERSION="v1.19")
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# add_definitions(-D_GNU_SOURCE -DDWARVES_VERSION="v1.20")
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add_definitions(-D_GNU_SOURCE -DDWARVES_MAJOR_VERSION=1)
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add_definitions(-D_GNU_SOURCE -DDWARVES_MINOR_VERSION=19)
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add_definitions(-D_GNU_SOURCE -DDWARVES_MINOR_VERSION=20)
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find_package(DWARF REQUIRED)
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find_package(ZLIB REQUIRED)
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‎MANIFEST

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@@ -50,6 +50,7 @@ changes-v1.16
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changes-v1.17
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changes-v1.18
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changes-v1.19
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changes-v1.20
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COPYING
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NEWS
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README

‎NEWS

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v1.20:
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Tue Feb 2 2021
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8d6f06f053a06829 (HEAD -> master, seventh/master, quaco/master, origin/master, origin/HEAD) dwarf_loader: Add conditional DW_FORM_implicit_const definition for older systems
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66d12e4790b7c5e5 dtagnames: Stop using the deprecated mallinfo() function
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1279e439b622aeb5 cmake: Bump minimum required version to 2.8.12 as per upstream support warning
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b1eaf0da6d1f72b2 dwarves: Make enum prefix search more robust
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d783117162c0212d dwarf_loader: Handle DWARF5 DW_TAG_call_site like DW_TAG_GNU_call_site
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3ff98a6396e91d0a dwarf_loader: Support DW_FORM_implicit_const in __attr_offset()
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b91b19840b0062b8 dwarf_loader: Support DW_AT_data_bit_offset
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c692e8ac5ccbab99 dwarf_loader: Optimize a bit the reading of DW_AT_data_member_location
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65917b24942ce620 dwarf_loader: Fix typo
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77205a119c85e396 dwarf_loader: Introduce __attr_offset() to reuse call to dwarf_attr()
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8ec231f6b0c8aaef dwarf_loader: Support DW_FORM_implicit_const in attr_numeric()
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7453895e01edb535 btf_encoder: Improve ELF error reporting
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1bb49897dd2b65b0 bpf_encoder: Translate SHN_XINDEX in symbol's st_shndx values
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3f8aad340bf1a188 elf_symtab: Handle SHN_XINDEX index in elf_section_by_name()
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e32b9800e650a6eb btf_encoder: Add extra checks for symbol names
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82749180b23d3c9c libbpf: allow to use packaged version
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452dbcf35f1a7bf9 btf_encoder: Improve error-handling around objcopy
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cf381f9a3822d68b btf_encoder: Fix handling of restrict qualifier
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b688e35970600c15 btf_encoder: fix skipping per-CPU variables at offset 0
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8c009d6ce762dfc9 btf_encoder: fix BTF variable generation for kernel modules
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b94e97e015a94e6b dwarves: Fix compilation on 32-bit architectures
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17df51c700248f02 btf_encoder: Detect kernel module ftrace addresses
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06ca639505fc56c6 btf_encoder: Use address size based on ELF's class
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aff60970d16b909e btf_encoder: Factor filter_functions function
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1e6a3fed6e52d365 rpm: Fix changelog date
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v1.19:
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Fri Nov 20 2020

‎changes-v1.20

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BTF encoder:
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- Improve ELF error reporting using elf_errmsg(elf_errno()).
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- Improve objcopy error handling.
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- Fix handling of 'restrict' qualifier, that was being treated as a 'const'.
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- Support SHN_XINDEX in st_shndx symbol indexes, to handle ELF objects with
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more than 65534 sections, for instance, which happens with kernels built
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with 'KCFLAGS="-ffunction-sections -fdata-sections", Other cases may
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include when using FG-ASLR, LTO.
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- Cope with functions without a name, as seen sometimes when building kernel
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images with some versions of clang, when a SEGFAULT was taking place.
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- Fix BTF variable generation for kernel modules, not skipping variables at
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offset zero.
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- Fix address size to match what is in the ELF file being processed, to fix using
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a 64-bit pahole binary to generate BTF for a 32-bit vmlinux image.
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- Use kernel module ftrace addresses when finding which functions to encode,
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which increases the number of functions encoded.
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libbpf:
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- Allow use of packaged version, for distros wanting to dynamically link with
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the system's libbpf package instead of using the libbpf git submodule shipped
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in pahole's source code.
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DWARF loader:
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- Support DW_AT_data_bit_offset
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This appeared in DWARF4 but is supported only in gcc's -gdwarf-5,
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support it in a way that makes the output be the same for both cases.
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$ gcc -gdwarf-5 -c examples/dwarf5/bf.c
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$ pahole bf.o
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struct pea {
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long int a:1; /* 0: 0 8 */
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long int b:1; /* 0: 1 8 */
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long int c:1; /* 0: 2 8 */
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/* XXX 29 bits hole, try to pack */
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/* Bitfield combined with next fields */
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int after_bitfield; /* 4 4 */
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/* size: 8, cachelines: 1, members: 4 */
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/* sum members: 4 */
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/* sum bitfield members: 3 bits, bit holes: 1, sum bit holes: 29 bits */
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/* last cacheline: 8 bytes */
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};
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- DW_FORM_implicit_const in attr_numeric() and attr_offset()
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- Support DW_TAG_GNU_call_site, its the standardized rename of the previously supported
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DW_TAG_GNU_call_site.
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build:
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- Fix compilation on 32-bit architectures.
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Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

‎rpm/SPECS/dwarves.spec

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%define libver 1
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Name: dwarves
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Version: 1.19
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Version: 1.20
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Release: 1%{?dist}
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License: GPLv2
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Summary: Debugging Information Manipulation Tools (pahole & friends)
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URL: http://acmel.wordpress.com
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Source: http://fedorapeople.org/~acme/dwarves/%{name}-%{version}.tar.xz
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Requires: %{libname}%{libver} = %{version}-%{release}
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BuildRequires: gcc
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BuildRequires: cmake
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BuildRequires: cmake >= 2.8.12
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BuildRequires: zlib-devel
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BuildRequires: elfutils-devel >= 0.130
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@@ -79,7 +79,7 @@ rm -Rf %{buildroot}
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%files
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%doc README.ctracer
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%doc README.btf
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%doc changes-v1.19
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%doc changes-v1.20
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%doc NEWS
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%{_bindir}/btfdiff
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%{_bindir}/codiff
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%{_libdir}/%{libname}_reorganize.so
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%changelog
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* Tue Feb 2 2021 Arnaldo Carvalho de Melo <[email protected]> - 1.20-1
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- New release: v1.20
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- btf_encoder:
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- Improve ELF error reporting using elf_errmsg(elf_errno())
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- Improve objcopy error handling.
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- Fix handling of 'restrict' qualifier, that was being treated as a 'const'.
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- Support SHN_XINDEX in st_shndx symbol indexes
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- Cope with functions without a name
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- Fix BTF variable generation for kernel modules
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- Fix address size to match what is in the ELF file being processed.
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- Use kernel module ftrace addresses when finding which functions to encode.
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- libbpf:
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- Allow use of packaged version.
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- dwarf_loader:
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- Support DW_AT_data_bit_offset
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- DW_FORM_implicit_const in attr_numeric() and attr_offset()
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- Support DW_TAG_GNU_call_site, standardized rename of DW_TAG_GNU_call_site.
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- build:
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- Fix compilation on 32-bit architectures.
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* Fri Nov 20 2020 Arnaldo Carvalho de Melo <[email protected]> - 1.19-1
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- New release: 1.19
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- Split BTF

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