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From: Matt Helsley <mhelsley@vmware.com>
To: <linux-kernel@vger.kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Julien Thierry <jthierry@redhat.com>,
	Ingo Molnar <mingo@redhat.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Miroslav Benes <mbenes@suse.cz>,
	Matt Helsley <mhelsley@vmware.com>
Subject: [RFC][PATCH 33/36] objtool: mcount: Move sift_rel_mcount out of wrapper file
Date: Fri, 10 Apr 2020 12:35:56 -0700	[thread overview]
Message-ID: <0442618da2678ee6bc657bfda6137140239f58be.1586468801.git.mhelsley@vmware.com> (raw)
In-Reply-To: <cover.1586468801.git.mhelsley@vmware.com>

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 <mhelsley@vmware.com>
---
 tools/objtool/recordmcount.c | 47 +++++++++++++++++++++++++++++++++
 tools/objtool/recordmcount.h | 51 ------------------------------------
 2 files changed, 47 insertions(+), 51 deletions(-)

diff --git a/tools/objtool/recordmcount.c b/tools/objtool/recordmcount.c
index 89765870b0dd..a16611a352e5 100644
--- a/tools/objtool/recordmcount.c
+++ b/tools/objtool/recordmcount.c
@@ -394,6 +394,53 @@ 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;
+	unsigned int mcount_sym_info = 0;
+	struct rela *rela;
+
+	list_for_each_entry(rela, &rels->rela_list, list) {
+		unsigned long addend;
+
+		if (!mcount_sym_info)
+			mcount_sym_info = get_mcount_sym_info(rela);
+
+		if (mcount_sym_info != GELF_R_INFO(rela->sym->idx, rela->type) || is_fake_mcount(rela))
+			continue;
+
+		addend = rela->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 bdf77172da58..7db08ad9b4a7 100644
--- a/tools/objtool/recordmcount.h
+++ b/tools/objtool/recordmcount.h
@@ -17,68 +17,17 @@
  * This conversion to macros was done by:
  * Copyright 2010 Steven Rostedt <srostedt@redhat.com>, 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;
-	unsigned int mcount_sym_info = 0;
-	struct rela *rela;
-
-	list_for_each_entry(rela, &rels->rela_list, list) {
-		unsigned long addend;
-
-		if (!mcount_sym_info)
-			mcount_sym_info = get_mcount_sym_info(rela);
-
-		if (mcount_sym_info != GELF_R_INFO(rela->sym->idx, rela->type) || is_fake_mcount(rela))
-			continue;
-
-		addend = rela->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


  parent reply	other threads:[~2020-04-10 19:39 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-10 19:35 [RFC][PATCH 00/36] objtool: Make recordmcount a subcommand Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 01/36] objtool: Exit successfully when requesting help Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 02/36] objtool: Move struct objtool_file into arch-independent header Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 03/36] objtool: Enable compilation of objtool for all architectures Matt Helsley
2020-04-14  7:39   ` Julien Thierry
2020-04-14 13:41     ` Steven Rostedt
2020-04-14 14:01       ` Julien Thierry
2020-04-14 20:56     ` Matt Helsley
2020-04-15  7:05       ` Julien Thierry
2020-04-10 19:35 ` [RFC][PATCH 04/36] objtool: Report missing support for subcommands Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 05/36] objtool: Add support for relocations without addends Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 06/36] objtool: Prepare to merge recordmcount Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 07/36] objtool: Make recordmcount into mcount subcmd Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 08/36] objtool: recordmcount: Start using objtool's elf wrapper Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 09/36] objtool: recordmcount: Search for __mcount_loc before walking the sections Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 10/36] objtool: recordmcount: Convert do_func() relhdrs Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 11/36] objtool: mcount: Remove unused fname parameter Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 12/36] objtool: mcount: Use libelf for section header names Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 13/36] objtool: mcount: Walk objtool Elf structs in find_secsym_ndx Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 14/36] objtool: mcount: Use symbol structs to find mcount relocations Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 15/36] objtool: mcount: Walk relocation lists Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 16/36] objtool: mcount: Move get_mcountsym Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 17/36] objtool: mcount: Replace MIPS offset types Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 18/36] objtool: mcount: Move is_fake_mcount() Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 19/36] objtool: mcount: Stop using ehdr in find_section_sym_index Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 20/36] objtool: mcount: Move find_section_sym_index() Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 21/36] objtool: mcount: Restrict using ehdr in append_func() Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 22/36] objtool: mcount: Use objtool ELF to write Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 23/36] objtool: mcount: Move nop_mcount() Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 24/36] objtool: mcount: Move helpers out of ELF wrapper Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 25/36] objtool: mcount: Move relocation entry size detection Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 26/36] objtool: mcount: Only keep ELF file size Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 27/36] objtool: mcount: Use ELF header from objtool Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 28/36] objtool: mcount: Remove unused file mapping Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 29/36] objtool: mcount: Reduce usage of _size wrapper Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 30/36] objtool: mcount: Move mcount_adjust out of wrapper Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 31/36] objtool: mcount: Pre-allocate new ELF sections Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 32/36] objtool: mcount: Generic location and relocation table types Matt Helsley
2020-04-10 19:35 ` Matt Helsley [this message]
2020-04-10 19:35 ` [RFC][PATCH 34/36] objtool: mcount: Remove wrapper for ELF relocation type Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 35/36] objtool: mcount: Remove wrapper double-include trick Matt Helsley
2020-04-10 19:35 ` [RFC][PATCH 36/36] objtool: mcount: Remove wordsized endian wrappers Matt Helsley
2020-04-14  7:24 ` [RFC][PATCH 00/36] objtool: Make recordmcount a subcommand Julien Thierry
2020-04-14 13:35   ` Steven Rostedt
2020-04-14 14:17     ` Julien Thierry
2020-04-14 15:54       ` Steven Rostedt
2020-04-14 20:09         ` Matt Helsley
2020-04-14 20:47           ` Peter Zijlstra
2020-04-14 21:05             ` Steven Rostedt
2020-04-14 21:17               ` Peter Zijlstra
2020-04-14 21:47                 ` Steven Rostedt
2020-04-14 22:25                   ` Peter Zijlstra

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