From patchwork Fri Aug 16 12:23:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raphael Gault X-Patchwork-Id: 11097539 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B955013A0 for ; Fri, 16 Aug 2019 12:25:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A118D2893D for ; Fri, 16 Aug 2019 12:25:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 925EB289C6; Fri, 16 Aug 2019 12:25:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D72DA2893D for ; Fri, 16 Aug 2019 12:25:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=bHn4zksCkHp3iJ4DdY0uU1l5u1fBECG05Ex3Su86RkY=; b=kYS6t161H/sMfa3x4FkHGo3HIw h4nX6wRgQ2+JEwnB7DLD7iYjgpaGGPTPnLA16TdJvgqsmnMtkK5JydHoqlBb77mnXdeIlUlKa/ZvJ d88ZIJvtGU/RXKKmzF5qOs26RX4aTbvrwc1RWbFtpT19ni2zmMahTg/EJLZT+Wp56/Dh+p4vb3Rtr 7+xPKGg5Dja/uyWcJv3Bs+d8zQ1GXTr60/voY2Z2KmMoOWChv8HGksswOeeeLAhwl7JIgu2mx+5w8 1KYynzGIBTO4PIwm0TAU2/As4kjkQqRFB6ykzCRPmdgfg/ykEK5L9/zOmKoUAPOV34OD7jIZXo+5L GjslD7wg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hybIa-0006Ha-Rx; Fri, 16 Aug 2019 12:25:40 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hybHe-0004Gh-SF for linux-arm-kernel@lists.infradead.org; Fri, 16 Aug 2019 12:24:45 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5C0CA1570; Fri, 16 Aug 2019 05:24:42 -0700 (PDT) Received: from e121650-lin.cambridge.arm.com (e121650-lin.cambridge.arm.com [10.1.196.120]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 077193F706; Fri, 16 Aug 2019 05:24:40 -0700 (PDT) From: Raphael Gault To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, jpoimboe@redhat.com Subject: [RFC v4 02/18] objtool: orc: Refactor ORC API for other architectures to implement. Date: Fri, 16 Aug 2019 13:23:47 +0100 Message-Id: <20190816122403.14994-3-raphael.gault@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190816122403.14994-1-raphael.gault@arm.com> References: <20190816122403.14994-1-raphael.gault@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190816_052443_315606_5F25F168 X-CRM114-Status: GOOD ( 15.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: raph.gault+kdev@gmail.com, peterz@infradead.org, catalin.marinas@arm.com, will.deacon@arm.com, Raphael Gault , julien.thierry.kdev@gmail.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The ORC unwinder is only supported on x86 at the moment and should thus be in the x86 architecture code. In order not to break the whole structure in case another architecture decides to support the ORC unwinder via objtool we choose to let the implementation be done in the architecture dependent code. Signed-off-by: Raphael Gault --- tools/objtool/Build | 2 - tools/objtool/arch.h | 3 + tools/objtool/arch/x86/Build | 2 + tools/objtool/{ => arch/x86}/orc_dump.c | 4 +- tools/objtool/{ => arch/x86}/orc_gen.c | 104 ++++++++++++++++++++++-- tools/objtool/check.c | 99 +--------------------- tools/objtool/orc.h | 4 +- 7 files changed, 111 insertions(+), 107 deletions(-) rename tools/objtool/{ => arch/x86}/orc_dump.c (98%) rename tools/objtool/{ => arch/x86}/orc_gen.c (66%) diff --git a/tools/objtool/Build b/tools/objtool/Build index 8dc4f0848362..d069d26d97fa 100644 --- a/tools/objtool/Build +++ b/tools/objtool/Build @@ -2,8 +2,6 @@ objtool-y += arch/$(SRCARCH)/ objtool-y += builtin-check.o objtool-y += builtin-orc.o objtool-y += check.o -objtool-y += orc_gen.o -objtool-y += orc_dump.o objtool-y += elf.o objtool-y += special.o objtool-y += objtool.o diff --git a/tools/objtool/arch.h b/tools/objtool/arch.h index a9a50a25ca66..e91e12807678 100644 --- a/tools/objtool/arch.h +++ b/tools/objtool/arch.h @@ -10,6 +10,7 @@ #include #include "elf.h" #include "cfi.h" +#include "orc.h" enum insn_type { INSN_JUMP_CONDITIONAL, @@ -77,6 +78,8 @@ int arch_decode_instruction(struct elf *elf, struct section *sec, bool arch_callee_saved_reg(unsigned char reg); +int arch_orc_read_unwind_hints(struct objtool_file *file); + unsigned long arch_jump_destination(struct instruction *insn); unsigned long arch_dest_rela_offset(int addend); diff --git a/tools/objtool/arch/x86/Build b/tools/objtool/arch/x86/Build index b998412c017d..1f11b45999d0 100644 --- a/tools/objtool/arch/x86/Build +++ b/tools/objtool/arch/x86/Build @@ -1,4 +1,6 @@ objtool-y += decode.o +objtool-y += orc_dump.o +objtool-y += orc_gen.o inat_tables_script = arch/x86/tools/gen-insn-attr-x86.awk inat_tables_maps = arch/x86/lib/x86-opcode-map.txt diff --git a/tools/objtool/orc_dump.c b/tools/objtool/arch/x86/orc_dump.c similarity index 98% rename from tools/objtool/orc_dump.c rename to tools/objtool/arch/x86/orc_dump.c index 13ccf775a83a..cfe8f96bdd68 100644 --- a/tools/objtool/orc_dump.c +++ b/tools/objtool/arch/x86/orc_dump.c @@ -4,8 +4,8 @@ */ #include -#include "orc.h" -#include "warn.h" +#include "../../orc.h" +#include "../../warn.h" static const char *reg_name(unsigned int reg) { diff --git a/tools/objtool/orc_gen.c b/tools/objtool/arch/x86/orc_gen.c similarity index 66% rename from tools/objtool/orc_gen.c rename to tools/objtool/arch/x86/orc_gen.c index 27a4112848c2..b4f285bf5271 100644 --- a/tools/objtool/orc_gen.c +++ b/tools/objtool/arch/x86/orc_gen.c @@ -6,11 +6,11 @@ #include #include -#include "orc.h" -#include "check.h" -#include "warn.h" +#include "../../orc.h" +#include "../../check.h" +#include "../../warn.h" -int create_orc(struct objtool_file *file) +int arch_create_orc(struct objtool_file *file) { struct instruction *insn; @@ -116,7 +116,7 @@ static int create_orc_entry(struct section *u_sec, struct section *ip_relasec, return 0; } -int create_orc_sections(struct objtool_file *file) +int arch_create_orc_sections(struct objtool_file *file) { struct instruction *insn, *prev_insn; struct section *sec, *u_sec, *ip_relasec; @@ -209,3 +209,97 @@ int create_orc_sections(struct objtool_file *file) return 0; } + +int arch_orc_read_unwind_hints(struct objtool_file *file) +{ + struct section *sec, *relasec; + struct rela *rela; + struct unwind_hint *hint; + struct instruction *insn; + struct cfi_reg *cfa; + int i; + + sec = find_section_by_name(file->elf, ".discard.unwind_hints"); + if (!sec) + return 0; + + relasec = sec->rela; + if (!relasec) { + WARN("missing .rela.discard.unwind_hints section"); + return -1; + } + + if (sec->len % sizeof(struct unwind_hint)) { + WARN("struct unwind_hint size mismatch"); + return -1; + } + + file->hints = true; + + for (i = 0; i < sec->len / sizeof(struct unwind_hint); i++) { + hint = (struct unwind_hint *)sec->data->d_buf + i; + + rela = find_rela_by_dest(sec, i * sizeof(*hint)); + if (!rela) { + WARN("can't find rela for unwind_hints[%d]", i); + return -1; + } + + insn = find_insn(file, rela->sym->sec, rela->addend); + if (!insn) { + WARN("can't find insn for unwind_hints[%d]", i); + return -1; + } + + cfa = &insn->state.cfa; + + if (hint->type == UNWIND_HINT_TYPE_SAVE) { + insn->save = true; + continue; + + } else if (hint->type == UNWIND_HINT_TYPE_RESTORE) { + insn->restore = true; + insn->hint = true; + continue; + } + + insn->hint = true; + + switch (hint->sp_reg) { + case ORC_REG_UNDEFINED: + cfa->base = CFI_UNDEFINED; + break; + case ORC_REG_SP: + cfa->base = CFI_SP; + break; + case ORC_REG_BP: + cfa->base = CFI_BP; + break; + case ORC_REG_SP_INDIRECT: + cfa->base = CFI_SP_INDIRECT; + break; + case ORC_REG_R10: + cfa->base = CFI_R10; + break; + case ORC_REG_R13: + cfa->base = CFI_R13; + break; + case ORC_REG_DI: + cfa->base = CFI_DI; + break; + case ORC_REG_DX: + cfa->base = CFI_DX; + break; + default: + WARN_FUNC("unsupported unwind_hint sp base reg %d", + insn->sec, insn->offset, hint->sp_reg); + return -1; + } + + cfa->offset = hint->sp_offset; + insn->state.type = hint->type; + insn->state.end = hint->end; + } + + return 0; +} diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 479fab46b656..30e147391dcb 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1162,99 +1162,6 @@ static int add_jump_table_alts(struct objtool_file *file) return 0; } -static int read_unwind_hints(struct objtool_file *file) -{ - struct section *sec, *relasec; - struct rela *rela; - struct unwind_hint *hint; - struct instruction *insn; - struct cfi_reg *cfa; - int i; - - sec = find_section_by_name(file->elf, ".discard.unwind_hints"); - if (!sec) - return 0; - - relasec = sec->rela; - if (!relasec) { - WARN("missing .rela.discard.unwind_hints section"); - return -1; - } - - if (sec->len % sizeof(struct unwind_hint)) { - WARN("struct unwind_hint size mismatch"); - return -1; - } - - file->hints = true; - - for (i = 0; i < sec->len / sizeof(struct unwind_hint); i++) { - hint = (struct unwind_hint *)sec->data->d_buf + i; - - rela = find_rela_by_dest(sec, i * sizeof(*hint)); - if (!rela) { - WARN("can't find rela for unwind_hints[%d]", i); - return -1; - } - - insn = find_insn(file, rela->sym->sec, rela->addend); - if (!insn) { - WARN("can't find insn for unwind_hints[%d]", i); - return -1; - } - - cfa = &insn->state.cfa; - - if (hint->type == UNWIND_HINT_TYPE_SAVE) { - insn->save = true; - continue; - - } else if (hint->type == UNWIND_HINT_TYPE_RESTORE) { - insn->restore = true; - insn->hint = true; - continue; - } - - insn->hint = true; - - switch (hint->sp_reg) { - case ORC_REG_UNDEFINED: - cfa->base = CFI_UNDEFINED; - break; - case ORC_REG_SP: - cfa->base = CFI_SP; - break; - case ORC_REG_BP: - cfa->base = CFI_BP; - break; - case ORC_REG_SP_INDIRECT: - cfa->base = CFI_SP_INDIRECT; - break; - case ORC_REG_R10: - cfa->base = CFI_R10; - break; - case ORC_REG_R13: - cfa->base = CFI_R13; - break; - case ORC_REG_DI: - cfa->base = CFI_DI; - break; - case ORC_REG_DX: - cfa->base = CFI_DX; - break; - default: - WARN_FUNC("unsupported unwind_hint sp base reg %d", - insn->sec, insn->offset, hint->sp_reg); - return -1; - } - - cfa->offset = hint->sp_offset; - insn->state.type = hint->type; - insn->state.end = hint->end; - } - - return 0; -} static int read_retpoline_hints(struct objtool_file *file) { @@ -1354,7 +1261,7 @@ static int decode_sections(struct objtool_file *file) if (ret) return ret; - ret = read_unwind_hints(file); + ret = arch_orc_read_unwind_hints(file); if (ret) return ret; @@ -2479,11 +2386,11 @@ int check(const char *_objname, bool orc) } if (orc) { - ret = create_orc(&file); + ret = arch_create_orc(&file); if (ret < 0) goto out; - ret = create_orc_sections(&file); + ret = arch_create_orc_sections(&file); if (ret < 0) goto out; diff --git a/tools/objtool/orc.h b/tools/objtool/orc.h index ee2832221e62..fd7fa1d34a81 100644 --- a/tools/objtool/orc.h +++ b/tools/objtool/orc.h @@ -10,8 +10,8 @@ struct objtool_file; -int create_orc(struct objtool_file *file); -int create_orc_sections(struct objtool_file *file); +int arch_create_orc(struct objtool_file *file); +int arch_create_orc_sections(struct objtool_file *file); int orc_dump(const char *objname);