pahole: Prep 1.20

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Karinza38 · Feb 4, 2021 · 0d415f6 · 0d415f6
1 parent 7943374
commit 0d415f6
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Showing 5 changed files with 122 additions and 5 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -33,9 +33,9 @@ set(CMAKE_C_FLAGS_DEBUG "-Wall -Werror -ggdb -O0")
 set(CMAKE_C_FLAGS_RELEASE "-Wall -O2")
 
 # Just for grepping, DWARVES_VERSION isn't used anywhere anymore
-# add_definitions(-D_GNU_SOURCE -DDWARVES_VERSION="v1.19")
+# add_definitions(-D_GNU_SOURCE -DDWARVES_VERSION="v1.20")
 add_definitions(-D_GNU_SOURCE -DDWARVES_MAJOR_VERSION=1)
-add_definitions(-D_GNU_SOURCE -DDWARVES_MINOR_VERSION=19)
+add_definitions(-D_GNU_SOURCE -DDWARVES_MINOR_VERSION=20)
 find_package(DWARF REQUIRED)
 find_package(ZLIB REQUIRED)
 

diff --git a/MANIFEST b/MANIFEST
@@ -50,6 +50,7 @@ changes-v1.16
 changes-v1.17
 changes-v1.18
 changes-v1.19
+changes-v1.20
 COPYING
 NEWS
 README

diff --git a/NEWS b/NEWS
@@ -1,3 +1,33 @@
+v1.20:
+
+Tue Feb  2 2021
+
+8d6f06f053a06829 (HEAD -> master, seventh/master, quaco/master, origin/master, origin/HEAD) dwarf_loader: Add conditional DW_FORM_implicit_const definition for older systems
+66d12e4790b7c5e5 dtagnames: Stop using the deprecated mallinfo() function
+1279e439b622aeb5 cmake: Bump minimum required version to 2.8.12 as per upstream support warning
+b1eaf0da6d1f72b2 dwarves: Make enum prefix search more robust
+d783117162c0212d dwarf_loader: Handle DWARF5 DW_TAG_call_site like DW_TAG_GNU_call_site
+3ff98a6396e91d0a dwarf_loader: Support DW_FORM_implicit_const in __attr_offset()
+b91b19840b0062b8 dwarf_loader: Support DW_AT_data_bit_offset
+c692e8ac5ccbab99 dwarf_loader: Optimize a bit the reading of DW_AT_data_member_location
+65917b24942ce620 dwarf_loader: Fix typo
+77205a119c85e396 dwarf_loader: Introduce __attr_offset() to reuse call to dwarf_attr()
+8ec231f6b0c8aaef dwarf_loader: Support DW_FORM_implicit_const in attr_numeric()
+7453895e01edb535 btf_encoder: Improve ELF error reporting
+1bb49897dd2b65b0 bpf_encoder: Translate SHN_XINDEX in symbol's st_shndx values
+3f8aad340bf1a188 elf_symtab: Handle SHN_XINDEX index in elf_section_by_name()
+e32b9800e650a6eb btf_encoder: Add extra checks for symbol names
+82749180b23d3c9c libbpf: allow to use packaged version
+452dbcf35f1a7bf9 btf_encoder: Improve error-handling around objcopy
+cf381f9a3822d68b btf_encoder: Fix handling of restrict qualifier
+b688e35970600c15 btf_encoder: fix skipping per-CPU variables at offset 0
+8c009d6ce762dfc9 btf_encoder: fix BTF variable generation for kernel modules
+b94e97e015a94e6b dwarves: Fix compilation on 32-bit architectures
+17df51c700248f02 btf_encoder: Detect kernel module ftrace addresses
+06ca639505fc56c6 btf_encoder: Use address size based on ELF's class
+aff60970d16b909e btf_encoder: Factor filter_functions function
+1e6a3fed6e52d365 rpm: Fix changelog date
+
 v1.19:
 
 Fri Nov 20 2020

diff --git a/changes-v1.20 b/changes-v1.20
@@ -0,0 +1,66 @@
+BTF encoder:
+
+  - Improve ELF error reporting using elf_errmsg(elf_errno()).
+
+  - Improve objcopy error handling.
+
+  - Fix handling of 'restrict' qualifier, that was being treated as a 'const'.
+
+  - Support SHN_XINDEX in st_shndx symbol indexes, to handle ELF objects with
+    more than 65534 sections, for instance, which happens with kernels built
+    with 'KCFLAGS="-ffunction-sections -fdata-sections", Other cases may
+    include when using FG-ASLR, LTO.
+
+  - Cope with functions without a name, as seen sometimes when building kernel
+    images with some versions of clang, when a SEGFAULT was taking place.
+
+  - Fix BTF variable generation for kernel modules, not skipping variables at
+    offset zero.
+
+  - Fix address size to match what is in the ELF file being processed, to fix using
+    a 64-bit pahole binary to generate BTF for a 32-bit vmlinux image.
+
+  - Use kernel module ftrace addresses when finding which functions to encode,
+    which increases the number of functions encoded.
+
+libbpf:
+
+  - Allow use of packaged version, for distros wanting to dynamically link with
+    the system's libbpf package instead of using the libbpf git submodule shipped
+    in pahole's source code.
+
+DWARF loader:
+
+  - Support DW_AT_data_bit_offset
+
+    This appeared in DWARF4 but is supported only in gcc's -gdwarf-5,
+    support it in a way that makes the output be the same for both cases.
+
+      $ gcc -gdwarf-5 -c examples/dwarf5/bf.c
+      $ pahole bf.o
+      struct pea {
+            long int                   a:1;                  /*     0: 0  8 */
+            long int                   b:1;                  /*     0: 1  8 */
+            long int                   c:1;                  /*     0: 2  8 */
+
+            /* XXX 29 bits hole, try to pack */
+            /* Bitfield combined with next fields */
+
+            int                        after_bitfield;       /*     4     4 */
+
+            /* size: 8, cachelines: 1, members: 4 */
+            /* sum members: 4 */
+            /* sum bitfield members: 3 bits, bit holes: 1, sum bit holes: 29 bits */
+            /* last cacheline: 8 bytes */
+      };
+
+  - DW_FORM_implicit_const in attr_numeric() and attr_offset()
+
+  - Support DW_TAG_GNU_call_site, its the standardized rename of the previously supported
+    DW_TAG_GNU_call_site.
+
+build:
+
+    - Fix compilation on 32-bit architectures.
+
+Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
diff --git a/rpm/SPECS/dwarves.spec b/rpm/SPECS/dwarves.spec
@@ -2,15 +2,15 @@
 %define libver 1
 
 Name: dwarves
-Version: 1.19
+Version: 1.20
 Release: 1%{?dist}
 License: GPLv2
 Summary: Debugging Information Manipulation Tools (pahole & friends)
 URL: http://acmel.wordpress.com
 Source: http://fedorapeople.org/~acme/dwarves/%{name}-%{version}.tar.xz
 Requires: %{libname}%{libver} = %{version}-%{release}
 BuildRequires: gcc
-BuildRequires: cmake
+BuildRequires: cmake >= 2.8.12
 BuildRequires: zlib-devel
 BuildRequires: elfutils-devel >= 0.130
 
@@ -79,7 +79,7 @@ rm -Rf %{buildroot}
 %files
 %doc README.ctracer
 %doc README.btf
-%doc changes-v1.19
+%doc changes-v1.20
 %doc NEWS
 %{_bindir}/btfdiff
 %{_bindir}/codiff
@@ -134,6 +134,26 @@ rm -Rf %{buildroot}
 %{_libdir}/%{libname}_reorganize.so
 
 %changelog
+* Tue Feb  2 2021 Arnaldo Carvalho de Melo <[email protected]> - 1.20-1
+- New release: v1.20
+- btf_encoder:
+- Improve ELF error reporting using elf_errmsg(elf_errno())
+- Improve objcopy error handling.
+- Fix handling of 'restrict' qualifier, that was being treated as a 'const'.
+- Support SHN_XINDEX in st_shndx symbol indexes
+- Cope with functions without a name
+- Fix BTF variable generation for kernel modules
+- Fix address size to match what is in the ELF file being processed.
+- Use kernel module ftrace addresses when finding which functions to encode.
+- libbpf:
+- Allow use of packaged version.
+- dwarf_loader:
+- Support DW_AT_data_bit_offset
+- DW_FORM_implicit_const in attr_numeric() and attr_offset()
+- Support DW_TAG_GNU_call_site, standardized rename of DW_TAG_GNU_call_site.
+- build:
+- Fix compilation on 32-bit architectures.
+
 * Fri Nov 20 2020 Arnaldo Carvalho de Melo <[email protected]> - 1.19-1
 - New release: 1.19
 - Split BTF