linux-kernel - [PATCH 2/4] modpost: pass r_type to addend_*

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Message-Id: <20230723100446.3062358-2-masahiroy@kernel.org>
Date:   Sun, 23 Jul 2023 19:04:44 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>
Subject: [PATCH 2/4] modpost: pass r_type to addend_*_rel()

All of addend_*_rel() need the Elf_Rela pointer just for calculating
ELF_R_TYPE(r->r_info).

You can do it on the caller to de-duplicate the code.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 scripts/mod/modpost.c | 24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index a8e85b7cc0da..570a6cb6dd00 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1257,11 +1257,9 @@ static void check_section_mismatch(struct module *mod, struct elf_info *elf,
 				 tosec, taddr);
 }
 
-static Elf_Addr addend_386_rel(uint32_t *location, Elf_Rela *r)
+static Elf_Addr addend_386_rel(uint32_t *location, unsigned int r_type)
 {
-	unsigned int r_typ = ELF_R_TYPE(r->r_info);
-
-	switch (r_typ) {
+	switch (r_type) {
 	case R_386_32:
 		return TO_NATIVE(*location);
 	case R_386_PC32:
@@ -1312,13 +1310,12 @@ static int32_t sign_extend32(int32_t value, int index)
 	return (int32_t)(value << shift) >> shift;
 }
 
-static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, Elf_Rela *r)
+static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, unsigned int r_type)
 {
-	unsigned int r_typ = ELF_R_TYPE(r->r_info);
 	uint32_t inst, upper, lower, sign, j1, j2;
 	int32_t offset;
 
-	switch (r_typ) {
+	switch (r_type) {
 	case R_ARM_ABS32:
 	case R_ARM_REL32:
 		inst = TO_NATIVE(*(uint32_t *)loc);
@@ -1397,13 +1394,12 @@ static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, Elf_Rela *r)
 	return (Elf_Addr)(-1);
 }
 
-static Elf_Addr addend_mips_rel(uint32_t *location, Elf_Rela *r)
+static Elf_Addr addend_mips_rel(uint32_t *location, unsigned int r_type)
 {
-	unsigned int r_typ = ELF_R_TYPE(r->r_info);
 	uint32_t inst;
 
 	inst = TO_NATIVE(*location);
-	switch (r_typ) {
+	switch (r_type) {
 	case R_MIPS_LO16:
 		return inst & 0xffff;
 	case R_MIPS_26:
@@ -1500,6 +1496,7 @@ static void section_rel(struct module *mod, struct elf_info *elf,
 		Elf_Sym *tsym;
 		Elf_Addr taddr = 0;
 		void *loc;
+		unsigned int r_type;
 
 		r.r_offset = TO_NATIVE(rel->r_offset);
 #if KERNEL_ELFCLASS == ELFCLASS64
@@ -1520,16 +1517,17 @@ static void section_rel(struct module *mod, struct elf_info *elf,
 
 		loc = sym_get_data_by_offset(elf, fsecndx, r.r_offset);
 		tsym = elf->symtab_start + r_sym;
+		r_type = ELF_R_TYPE(r.r_info);
 
 		switch (elf->hdr->e_machine) {
 		case EM_386:
-			taddr = addend_386_rel(loc, &r);
+			taddr = addend_386_rel(loc, r_type);
 			break;
 		case EM_ARM:
-			taddr = addend_arm_rel(loc, tsym, &r);
+			taddr = addend_arm_rel(loc, tsym, r_type);
 			break;
 		case EM_MIPS:
-			taddr = addend_mips_rel(loc, &r);
+			taddr = addend_mips_rel(loc, r_type);
 			break;
 		default:
 			fatal("Please add code to calculate addend for this architecture\n");
-- 
2.39.2