From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.1 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_PASS autolearn=ham autolearn_force=no version=3.4.2 Received: (qmail 31748 invoked from network); 29 Mar 2020 20:15:30 -0000 Received-SPF: pass (mother.openwall.net: domain of lists.openwall.com designates 195.42.179.200 as permitted sender) receiver=inbox.vuxu.org; client-ip=195.42.179.200 envelope-from= Received: from mother.openwall.net (195.42.179.200) by inbox.vuxu.org with UTF8ESMTPZ; 29 Mar 2020 20:15:30 -0000 Received: (qmail 9472 invoked by uid 550); 29 Mar 2020 20:15:28 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Reply-To: musl@lists.openwall.com Received: (qmail 8150 invoked from network); 29 Mar 2020 20:15:24 -0000 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=rcombs.me; q=dns/txt; s=mx; t=1585512926; h=Message-Id: Date: Subject: To: From: Sender; bh=c0Jv4Xf+2Gtc2f282v4zYWpOR1IhQaiDHAnMifS+wPM=; b=k4JYFU2xg7cR6NULMLyhwjTaVKlH1laJ8FhVLf6RvBdEv//fWuPgn4foeeZl3ePCkndG/zlr 470VwHt/G+uRImrDHOwVzuI0FnIJ7Mlt1AXdnZlCW4CrWK/wZhvw+GpTWcNdyy06zRDndvdn wykFmncvwRaLTB0Dz2JXAote1Ds= X-Mailgun-Sending-Ip: 198.61.254.54 X-Mailgun-Sid: WyI4ZjMyMiIsICJtdXNsQGxpc3RzLm9wZW53YWxsLmNvbSIsICJiMGJhIl0= Sender: rcombs@rcombs.me From: rcombs To: musl@lists.openwall.com Date: Sun, 29 Mar 2020 15:15:00 -0500 Message-Id: <1585512901-18979-1-git-send-email-rcombs@rcombs.me> X-Mailer: git-send-email 2.7.4 Subject: [musl] [PATCH 1/2] ldso: when run via CLI, set auxv as if the app was loaded by the kernel --- ldso/dynlink.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/ldso/dynlink.c b/ldso/dynlink.c index 6468f20..a9144e2 100644 --- a/ldso/dynlink.c +++ b/ldso/dynlink.c @@ -1808,6 +1808,22 @@ void __dls3(size_t *sp, size_t *auxv) } dprintf(1, "\t%s (%p)\n", ldso.name, ldso.base); } + + // Make it look to the app as if it was loaded by the kernel + for (i=0; auxv[i]; i+=2) { + if (auxv[i] == AT_BASE) + auxv[i + 1] = (size_t)ldso.base; + if (auxv[i] == AT_PHDR) + auxv[i + 1] = (size_t)app.phdr; + if (auxv[i] == AT_ENTRY) + auxv[i + 1] = aux[AT_ENTRY]; + if (auxv[i] == AT_PHNUM) + auxv[i + 1] = app.phnum; + if (auxv[i] == AT_PHENT) + auxv[i + 1] = app.phentsize; + if (auxv[i] == AT_EXECFN) + auxv[i + 1] = (size_t)app.name; + } } if (app.tls.size) { libc.tls_head = tls_tail = &app.tls; -- 2.7.4