2020-06-18 20:48:21

by Matt Helsley

[permalink] [raw]
Subject: [RFC][PATCH v5 32/51] objtool: mcount: Move sift_rel_mcount out of wrapper file

Now that this function no longer uses any of the old recordmcount
wrapper code we can move it out of the wrapper too.

Signed-off-by: Matt Helsley <[email protected]>
---
tools/objtool/recordmcount.c | 47 +++++++++++++++++++++++++++++++++
tools/objtool/recordmcount.h | 50 ------------------------------------
2 files changed, 47 insertions(+), 50 deletions(-)

diff --git a/tools/objtool/recordmcount.c b/tools/objtool/recordmcount.c
index 34976f3294ac..b9f15fc1f40e 100644
--- a/tools/objtool/recordmcount.c
+++ b/tools/objtool/recordmcount.c
@@ -395,6 +395,53 @@ static int mcount_adjust = 0;
/* Size of an entry in __mcount_loc; 4 or 8 */
static size_t loc_size;

+/*
+ * Look at the relocations in order to find the calls to mcount.
+ * Accumulate the section offsets that are found, and their relocation info,
+ * onto the end of the existing arrays.
+ */
+static void sift_rel_mcount(GElf_Addr **mlocpp,
+ GElf_Sxword *r_offsetp,
+ void **const mrelpp,
+ const struct section * const rels,
+ unsigned const recsym_index,
+ unsigned long const recval,
+ unsigned const reltype,
+ bool is_rela)
+{
+ GElf_Rel *mrelp = *mrelpp;
+ GElf_Rela *mrelap = *mrelpp;
+ struct symbol *mcount_sym = NULL;
+ struct reloc *reloc;
+
+ list_for_each_entry(reloc, &rels->reloc_list, list) {
+ unsigned long addend;
+
+ if (!mcount_sym)
+ mcount_sym = get_mcount_sym(reloc);
+
+ if (mcount_sym != reloc->sym || is_fake_mcount(reloc))
+ continue;
+
+ addend = reloc->offset - recval + mcount_adjust;
+ if (is_rela) {
+ mrelap->r_offset = *r_offsetp;
+ mrelap->r_info = GELF_R_INFO(recsym_index, reltype);
+ mrelap->r_addend = addend;
+ mrelap++;
+ **mlocpp = 0;
+ } else {
+ mrelp->r_offset = *r_offsetp;
+ mrelp->r_info = GELF_R_INFO(recsym_index, reltype);
+ mrelp++;
+ **mlocpp = addend;
+ }
+ (*mlocpp)++;
+ *r_offsetp += loc_size;
+ }
+ *mrelpp = is_rela ? (void *)mrelap : (void *)mrelp;
+}
+
/* 32 bit and 64 bit are very similar */
#include "recordmcount.h"
#define RECORD_MCOUNT_64
diff --git a/tools/objtool/recordmcount.h b/tools/objtool/recordmcount.h
index fc6346a7eaf5..2dd303d51b78 100644
--- a/tools/objtool/recordmcount.h
+++ b/tools/objtool/recordmcount.h
@@ -17,67 +17,17 @@
* This conversion to macros was done by:
* Copyright 2010 Steven Rostedt <[email protected]>, Red Hat Inc.
*/
-#undef sift_rel_mcount
#undef do_func
#undef Elf_Rela

#ifdef RECORD_MCOUNT_64
-# define sift_rel_mcount sift64_rel_mcount
# define do_func do64
# define Elf_Rela Elf64_Rela
#else
-# define sift_rel_mcount sift32_rel_mcount
# define do_func do32
# define Elf_Rela Elf32_Rela
#endif

-/*
- * Look at the relocations in order to find the calls to mcount.
- * Accumulate the section offsets that are found, and their relocation info,
- * onto the end of the existing arrays.
- */
-static void sift_rel_mcount(GElf_Addr **mlocpp,
- GElf_Sxword *r_offsetp,
- void **const mrelpp,
- const struct section * const rels,
- unsigned const recsym_index,
- unsigned long const recval,
- unsigned const reltype,
- bool is_rela)
-{
- GElf_Rel *mrelp = *mrelpp;
- GElf_Rela *mrelap = *mrelpp;
- struct symbol *mcount_sym = NULL;
- struct reloc *reloc;
-
- list_for_each_entry(reloc, &rels->reloc_list, list) {
- unsigned long addend;
-
- if (!mcount_sym)
- mcount_sym = get_mcount_sym(reloc);
-
- if (mcount_sym != reloc->sym || is_fake_mcount(reloc))
- continue;
-
- addend = reloc->offset - recval + mcount_adjust;
- if (is_rela) {
- mrelap->r_offset = *r_offsetp;
- mrelap->r_info = GELF_R_INFO(recsym_index, reltype);
- mrelap->r_addend = addend;
- mrelap++;
- **mlocpp = 0;
- } else {
- mrelp->r_offset = *r_offsetp;
- mrelp->r_info = GELF_R_INFO(recsym_index, reltype);
- mrelp++;
- **mlocpp = addend;
- }
- (*mlocpp)++;
- *r_offsetp += loc_size;
- }
- *mrelpp = is_rela ? (void *)mrelap : (void *)mrelp;
-}
-
/* Overall supervision for Elf32 ET_REL file. */
static int do_func(unsigned const reltype)
{
--
2.20.1