[PATCH 1/2] perf test: fix vmlinux failure on s390x

[PATCH 1/2] perf test: fix vmlinux failure on s390x

[Thomas Richter]

On s390x perf test 1 failed. It turned out that commit 4a084ecfc821
("perf report: Fix module symbol adjustment for s390x") was incorrect.
The previous implementation in dso__load_sym() is also
suitable for s390x.
Therefore this patch undoes commit 4a084ecfc821.

Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
---
 tools/perf/arch/s390/util/sym-handling.c | 8 --------
 tools/perf/util/symbol-elf.c             | 8 +-------
 tools/perf/util/symbol.h                 | 3 ---
 3 files changed, 1 insertion(+), 18 deletions(-)

diff --git a/tools/perf/arch/s390/util/sym-handling.c b/tools/perf/arch/s390/util/sym-handling.c
index e103f6e..581d4c5 100644
--- a/tools/perf/arch/s390/util/sym-handling.c
+++ b/tools/perf/arch/s390/util/sym-handling.c
@@ -18,12 +18,4 @@ bool elf__needs_adjust_symbols(GElf_Ehdr ehdr)
 		return false;
 	return ehdr.e_type == ET_REL || ehdr.e_type == ET_DYN;
 }
-
-void arch__adjust_sym_map_offset(GElf_Sym *sym,
-				 GElf_Shdr *shdr __maybe_unused,
-				 struct map *map)
-{
-	if (map->type == MAP__FUNCTION)
-		sym->st_value += map->start;
-}
 #endif
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 5c39f42..9cf781f 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -810,12 +810,6 @@ static u64 ref_reloc(struct kmap *kmap)
 void __weak arch__sym_update(struct symbol *s __maybe_unused,
 		GElf_Sym *sym __maybe_unused) { }
 
-void __weak arch__adjust_sym_map_offset(GElf_Sym *sym, GElf_Shdr *shdr,
-				       struct map *map __maybe_unused)
-{
-	sym->st_value -= shdr->sh_addr - shdr->sh_offset;
-}
-
 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
 		  struct symsrc *runtime_ss, int kmodule)
 {
@@ -996,7 +990,7 @@ int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
 
 			/* Adjust symbol to map to file offset */
 			if (adjust_kernel_syms)
-				arch__adjust_sym_map_offset(&sym, &shdr, map);
+				sym.st_value -= shdr.sh_addr - shdr.sh_offset;
 
 			if (strcmp(section_name,
 				   (curr_dso->short_name +
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 2bd6a1f..aad99e7 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -344,9 +344,6 @@ int setup_intlist(struct intlist **list, const char *list_str,
 #ifdef HAVE_LIBELF_SUPPORT
 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
 void arch__sym_update(struct symbol *s, GElf_Sym *sym);
-void arch__adjust_sym_map_offset(GElf_Sym *sym,
-				 GElf_Shdr *shdr __maybe_unused,
-				 struct map *map __maybe_unused);
 #endif
 
 #define SYMBOL_A 0
-- 
2.9.3

[PATCH 2/2] perf test: fix vmlinux failure on s390x part 2

[Thomas Richter]

On s390x perf test 1 failed. It turned out that commit cf6383f73cf2
("perf report: Fix kernel symbol adjustment for s390x") was incorrect.
The previous implementation in dso__load_sym() is also
suitable for s390x.
Therefore this patch undoes commit cf6383f73cf2

Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
---
 tools/perf/arch/s390/util/Build          |  1 -
 tools/perf/arch/s390/util/sym-handling.c | 21 ---------------------
 2 files changed, 22 deletions(-)
 delete mode 100644 tools/perf/arch/s390/util/sym-handling.c

diff --git a/tools/perf/arch/s390/util/Build b/tools/perf/arch/s390/util/Build
index bd518b6..5bd7b92 100644
--- a/tools/perf/arch/s390/util/Build
+++ b/tools/perf/arch/s390/util/Build
@@ -1,5 +1,4 @@
 libperf-y += header.o
-libperf-y += sym-handling.o
 libperf-y += kvm-stat.o
 
 libperf-$(CONFIG_DWARF) += dwarf-regs.o
diff --git a/tools/perf/arch/s390/util/sym-handling.c b/tools/perf/arch/s390/util/sym-handling.c
deleted file mode 100644
index 581d4c5..0000000
--- a/tools/perf/arch/s390/util/sym-handling.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Architecture specific ELF symbol handling and relocation mapping.
- *
- * Copyright 2017 IBM Corp.
- * Author(s): Thomas Richter <tmricht@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License (version 2 only)
- * as published by the Free Software Foundation.
- */
-
-#include "symbol.h"
-
-#ifdef HAVE_LIBELF_SUPPORT
-bool elf__needs_adjust_symbols(GElf_Ehdr ehdr)
-{
-	if (ehdr.e_type == ET_EXEC)
-		return false;
-	return ehdr.e_type == ET_REL || ehdr.e_type == ET_DYN;
-}
-#endif
-- 
2.9.3