This is a note to let you know that I've just added the patch titled
perf inject: Fix GEN_ELF_TEXT_OFFSET for jit
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-inject-fix-gen_elf_text_offset-for-jit.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 83e311b1992042a982a9b6a91045131debb1061c
Author: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Fri Oct 14 20:09:04 2022 +0300
perf inject: Fix GEN_ELF_TEXT_OFFSET for jit
[ Upstream commit 89b15d00527b7825ff19130ed83478e80e3fae99 ]
When a program header was added, it moved the text section but
GEN_ELF_TEXT_OFFSET was not updated.
Fix by adding the program header size and aligning.
Fixes: babd04386b1df8c3 ("perf jit: Include program header in ELF files")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Lieven Hey <lieven.hey@xxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221014170905.64069-7-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h
index 23a7401a63d02..7f5ce4f285d8b 100644
--- a/tools/perf/util/genelf.h
+++ b/tools/perf/util/genelf.h
@@ -2,6 +2,8 @@
#ifndef __GENELF_H__
#define __GENELF_H__
+#include <linux/math.h>
+
/* genelf.c */
int jit_write_elf(int fd, uint64_t code_addr, const char *sym,
const void *code, int csize, void *debug, int nr_debug_entries,
@@ -64,6 +66,6 @@ int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_ent
#endif
/* The .text section is directly after the ELF header */
-#define GEN_ELF_TEXT_OFFSET sizeof(Elf_Ehdr)
+#define GEN_ELF_TEXT_OFFSET round_up(sizeof(Elf_Ehdr) + sizeof(Elf_Phdr), 16)
#endif
