From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 42F123858C3A; Wed, 15 Dec 2021 22:25:25 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 42F123858C3A From: "hjl.tools at gmail dot com" To: glibc-bugs@sourceware.org Subject: [Bug dynamic-link/28676] p_align on PT_LOAD segment in DSO isn't honored Date: Wed, 15 Dec 2021 22:25:25 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: dynamic-link X-Bugzilla-Version: 2.35 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: hjl.tools at gmail dot com X-Bugzilla-Status: REOPENED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: 2.35 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: glibc-bugs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Glibc-bugs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Dec 2021 22:25:25 -0000 https://sourceware.org/bugzilla/show_bug.cgi?id=3D28676 H.J. Lu changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|FIXED |--- --- Comment #4 from H.J. Lu --- Linker may set p_align of a PT_LOAD segment larger than p_align of the first PT_LOAD segment to satisfy a section alignment: Elf file type is DYN (Shared object file) Entry point 0x0 There are 10 program headers, starting at offset 64 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flags Align LOAD 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000834 0x0000000000000834 R E 0x1000 LOAD 0x0000000000000e00 0x0000000000001e00 0x0000000000001e00 0x0000000000000230 0x0000000000000230 RW 0x1000 LOAD 0x0000000000400000 0x0000000000400000 0x0000000000400000 0x0000000000000004 0x0000000000000008 RW 0x400000 ... Section to Segment mapping: Segment Sections... 00 .note.gnu.property .note.gnu.build-id .gnu.hash .dynsym .dynstr .gnu.v ersion .gnu.version_r .rela.dyn .rela.plt .init .plt .plt.got .text .fini .rodat a .eh_frame_hdr .eh_frame 01 .init_array .fini_array .data.rel.ro .dynamic .got .got.plt 02 .data .bss We should align the first PT_LOAD segment to the maximum p_align of all PT_LOAD segments, similar to the kernel commit: commit ce81bb256a224259ab686742a6284930cbe4f1fa Author: Chris Kennelly Date: Thu Oct 15 20:12:32 2020 -0700 fs/binfmt_elf: use PT_LOAD p_align values for suitable start address A patch with a testcase is posted at https://sourceware.org/pipermail/libc-alpha/2021-December/134219.html --=20 You are receiving this mail because: You are on the CC list for the bug.=