From patchwork Fri May 16 15:26:33 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tom Tromey X-Patchwork-Id: 969 Return-Path: X-Original-To: siddhesh@wilcox.dreamhost.com Delivered-To: siddhesh@wilcox.dreamhost.com Received: from homiemail-mx23.g.dreamhost.com (mx2.sub5.homie.mail.dreamhost.com [208.113.200.128]) by wilcox.dreamhost.com (Postfix) with ESMTP id 6C27A36007A for ; Fri, 16 May 2014 08:43:47 -0700 (PDT) Received: by homiemail-mx23.g.dreamhost.com (Postfix, from userid 14314964) id 200DE63D61A6A; Fri, 16 May 2014 08:43:47 -0700 (PDT) X-Original-To: gdb@patchwork.siddhesh.in Delivered-To: x14314964@homiemail-mx23.g.dreamhost.com Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by homiemail-mx23.g.dreamhost.com (Postfix) with ESMTPS id EC02063D61A96 for ; Fri, 16 May 2014 08:43:46 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:cc:subject:date:message-id:in-reply-to :references; q=dns; s=default; b=Xd5J0HUHjOYHwo6U6Kcmeoh5FZkiMlf p4g1dE2V9FAHcFf8WLm0HDOmi/8TDHiiZ+kQ+Bd8UXEmrPi2pndDcZ89bmT7jBUL NrXhUIlRePMnC47MaxJ4U8goG5ukQSlmXRb+3py1qONWroOLKY4utHb/EVlHekW5 WnO6BeplM3c8= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:cc:subject:date:message-id:in-reply-to :references; s=default; bh=sJgpxwGG5X35X8i0puZGH2LgI+g=; b=mPY8Q KCluW80XNqDJ9ySLwtHsKnmKFN3gR2TheSUb8QW4zmoLvewyeAIYyJxAJ54rEwlH Bk83uMLRT2ismgbcsVDpdkrxsbitxiN7y9eL9L/iYw1jNfHBadhcjmpC1hN7vd7Q nodbsAaJZJrHuxvQ78kHsP3BBftJAfIzuTEZDE= Received: (qmail 24532 invoked by alias); 16 May 2014 15:43:43 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Delivered-To: mailing list gdb-patches@sourceware.org Received: (qmail 24429 invoked by uid 89); 16 May 2014 15:43:42 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.2 required=5.0 tests=AWL, BAYES_00, RP_MATCHES_RCVD, SPF_HELO_PASS, SPF_PASS autolearn=ham version=3.3.2 X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 16 May 2014 15:43:41 +0000 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s4GFQkM1003795 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 16 May 2014 11:26:46 -0400 Received: from barimba.redhat.com (ovpn-113-182.phx2.redhat.com [10.3.113.182]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s4GFQcVE006849; Fri, 16 May 2014 11:26:45 -0400 From: Tom Tromey To: gdb-patches@sourceware.org Cc: Jan Kratochvil Subject: [PATCH 12/14] add linux_infcall_mmap Date: Fri, 16 May 2014 09:26:33 -0600 Message-Id: <1400253995-12333-13-git-send-email-tromey@redhat.com> In-Reply-To: <1400253995-12333-1-git-send-email-tromey@redhat.com> References: <1400253995-12333-1-git-send-email-tromey@redhat.com> X-DH-Original-To: gdb@patchwork.siddhesh.in From: Jan Kratochvil This implements the new gdbarch "infcall_mmap" method for Linux. 2014-05-16 Jan Kratochvil * linux-tdep.c (linux_infcall_mmap): New function. (linux_init_abi): Add it to gdbarch. --- gdb/ChangeLog | 5 +++++ gdb/linux-tdep.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c index c10b8ee..28f8331 100644 --- a/gdb/linux-tdep.c +++ b/gdb/linux-tdep.c @@ -32,6 +32,9 @@ #include "cli/cli-utils.h" #include "arch-utils.h" #include "gdb_obstack.h" +#include "objfiles.h" +#include "infcall.h" +#include #include @@ -1766,6 +1769,48 @@ linux_gdb_signal_to_target (struct gdbarch *gdbarch, return -1; } +/* See gdbarch.sh 'infcall_mmap'. */ + +static CORE_ADDR +linux_infcall_mmap (CORE_ADDR size, unsigned prot) +{ + struct objfile *objf; + /* Do there still exist any Linux systems without "mmap64"? + "mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */ + struct value *mmap_val = find_function_in_inferior ("mmap64", &objf); + struct value *addr_val; + struct gdbarch *gdbarch = get_objfile_arch (objf); + CORE_ADDR retval; + enum + { + ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_MAX + }; + struct value *arg[ARG_MAX]; + + arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, + 0); + /* Assuming sizeof (unsigned long) == sizeof (size_t). */ + arg[ARG_LENGTH] = value_from_ulongest + (builtin_type (gdbarch)->builtin_unsigned_long, size); + gdb_assert ((prot & ~7) == 0); + arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, + 0 + | ((prot & 4) != 0 ? PROT_READ : 0) + | ((prot & 2) != 0 ? PROT_WRITE : 0) + | ((prot & 1) != 0 ? PROT_EXEC : 0)); + arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int, + MAP_PRIVATE | MAP_ANONYMOUS); + arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1); + arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64, + 0); + addr_val = call_function_by_hand (mmap_val, ARG_MAX, arg); + retval = value_as_address (addr_val); + if (retval == (CORE_ADDR) -1) + error (_("Failed inferior mmap call for %s bytes, errno is changed."), + pulongest (size)); + return retval; +} + /* To be called from the various GDB_OSABI_LINUX handlers for the various GNU/Linux architectures and machine types. */ @@ -1783,6 +1828,7 @@ linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) linux_gdb_signal_from_target); set_gdbarch_gdb_signal_to_target (gdbarch, linux_gdb_signal_to_target); + set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap); } /* Provide a prototype to silence -Wmissing-prototypes. */