From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/11735 Path: news.gmane.org!.POSTED!not-for-mail From: Nathan McSween Newsgroups: gmane.linux.lib.musl.general Subject: [RFC PATCH 5/5] string: add memsset a 'secure' memset and bsd explicit_bzero Date: Sat, 15 Jul 2017 19:55:41 +0000 Message-ID: <20170715195541.3136-6-nwmcsween@gmail.com> References: <20170715195541.3136-1-nwmcsween@gmail.com> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1500148737 2228 195.159.176.226 (15 Jul 2017 19:58:57 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 15 Jul 2017 19:58:57 +0000 (UTC) Cc: Nathan McSween To: musl@lists.openwall.com Original-X-From: musl-return-11748-gllmg-musl=m.gmane.org@lists.openwall.com Sat Jul 15 21:58:54 2017 Return-path: Envelope-to: gllmg-musl@m.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by blaine.gmane.org with smtp (Exim 4.84_2) (envelope-from ) id 1dWTD8-0008Gc-I9 for gllmg-musl@m.gmane.org; Sat, 15 Jul 2017 21:58:42 +0200 Original-Received: (qmail 5415 invoked by uid 550); 15 Jul 2017 19:58:37 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Original-Received: (qmail 3526 invoked from network); 15 Jul 2017 19:58:27 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=hkdxUEYvNdFp6+C4S+wwH9JoxQmKbwHW94BWgW6ra+o=; b=B5guYOywLN2P1ShyrcdOnJY4e3fdCxWOKsvHGgtal+L29HuTEFpaJHNk34hd9TBknn qd+mdS8aSvVsqRAddkdD5G24Q6HK2r9hKy/cmk+HP0PztBcdzZlPsgfnm8LbonHv9DxL R50kFkGEfxUNNp8D1NdPFFp5pU5qp/THeopl2OJ/0nQk7w1MVqboAA2Gx/8qKKuCyKYR xmJKK+X2WHvbZBWbNt4WdKc9/OwxM0MF//UIDcNyDTDdVrSpdxIUL3uD+6ZAth1YLHsN tMwGKiGe3UTd+ntGnGw/MUv02TGf9zmhCdeEE76NcjTC9b0kGz4VW2sZ2alwjee8CRkj GkaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=hkdxUEYvNdFp6+C4S+wwH9JoxQmKbwHW94BWgW6ra+o=; b=eFHePdz9b5YhGW/zIyiEgcxTYe5zI/qzmyTrn3u/xrV9BU62guop4ddLS+ncaOtDyK +deID/NgJmfQGbQtliuURBgBrruJKcTie+EwXDi0IfZccHBpnClfZtR0RWbhdLLIGDiF ud6jwJZbS7c85mpBtHS9sz1nVI18ew2Kl9bqKCse+LHqFsZrcL6QPAJCV2v7Ise3bvyX wfhoNIG3CWqGK0QU9C/iaGzrFe9xN2VVYj59g1BjTdQOHF9azQ/NENZ7+hbffrD/qZ0O 14pvj1TGEV9u5V0NW6gcqtBVZOgkN1xLPJYbwkyuw9dt2oPeUD3yip60A4v1HQrE2R3M XDFA== X-Gm-Message-State: AIVw112i69jLAnqNpRICw5NGOuWqtvdShVUeccLo/ZdorB364r1injA5 WQuhKJwJuwYg0ype X-Received: by 10.84.142.1 with SMTP id 1mr22674455plw.130.1500148695882; Sat, 15 Jul 2017 12:58:15 -0700 (PDT) X-Mailer: git-send-email 2.13.2 In-Reply-To: <20170715195541.3136-1-nwmcsween@gmail.com> Xref: news.gmane.org gmane.linux.lib.musl.general:11735 Archived-At: --- src/string/explicit_bzero.c | 9 +++++++++ src/string/memsset.c | 13 +++++++++++++ 2 files changed, 22 insertions(+) create mode 100644 src/string/explicit_bzero.c create mode 100644 src/string/memsset.c diff --git a/src/string/explicit_bzero.c b/src/string/explicit_bzero.c new file mode 100644 index 00000000..497dd2bc --- /dev/null +++ b/src/string/explicit_bzero.c @@ -0,0 +1,9 @@ +#define _BSD_SOURCE +#include + +void *__memsset(void *, int, size_t); + +void explicit_bzero(void *d, size_t n) +{ + __memsset(d, 0, n); +} diff --git a/src/string/memsset.c b/src/string/memsset.c new file mode 100644 index 00000000..d4ab72a4 --- /dev/null +++ b/src/string/memsset.c @@ -0,0 +1,13 @@ +#include + +#define hidden __attribute__((visibility("hidden"))) + +hidden +void *__memsset(void *d, int i, size_t n) +{ + memset(d, i, n); + + __asm__ __volatile__("" : "=r" (d): "0" (d) : "memory"); + + return d; +} -- 2.13.2