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Differential D32960 Diff 99434 sys/conf/vdso_amd64.ldscript

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sys/conf/vdso_amd64.ldscript

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2021 The FreeBSD Foundation
*
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Linker script for amd64 vdso.
*/
PHDRS
{
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
dynamic PT_DYNAMIC FLAGS(5);
eh_frame_hdr PT_GNU_EH_FRAME FLAGS(5);
}
emasteUnsubmitted
Done
Inline Actions

Wrong flags for PT_DYNAMIC and PT_GNU_EH_FRAME

Type           Offset             VirtAddr           PhysAddr
               FileSiz            MemSiz              Flg    Align
LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000
               0x00000000000002e6 0x00000000000002e6  R E    0x10
DYNAMIC        0x0000000000000218 0x0000000000000218 0x0000000000000218
               0x00000000000000b0 0x00000000000000b0  R E    0x8
GNU_EH_FRAME   0x0000000000000194 0x0000000000000194 0x0000000000000194
               0x0000000000000014 0x0000000000000014  R E    0x4
emaste: Wrong flags for PT_DYNAMIC and PT_GNU_EH_FRAME ``` Type Offset…
kibAuthorUnsubmitted
Done
Inline Actions

Could you please clarify? What specifically is wrong?

kib: Could you please clarify? What specifically is wrong?
emasteUnsubmitted
Done
Inline Actions

Oh, nvm, I am mistaken. Maybe worth a (reminder) comment about everything being in the same page.

emaste: Oh, nvm, I am mistaken. Maybe worth a (reminder) comment about everything being in the same…
kibAuthorUnsubmitted
Done
Inline Actions

There is some discussion in the sys/tools/amd64_vdso.sh comment. Are you proposing to expand the text? It would become repeating the linker script.

kib: There is some discussion in the sys/tools/amd64_vdso.sh comment. Are you proposing to expand…
SECTIONS
{
. = . + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
.gnu.hash : { *(.gnu.hash) } :text
.dynsym : { *(.dynsym) } :text
.dynstr : { *(.dynstr) } :text
.gnu.version : { *(.gnu.version) } :text
.gnu.version_d : { *(.gnu.version_d) } :text
.gnu.version_r : { *(.gnu.version_r) } :text
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
.eh_frame : { KEEP (*(.eh_frame)) } :text
.dynamic : { *(.dynamic) } :text :dynamic
.rodata : { *(.rodata*) } :text
.data : {
*(.got.plt) *(.got)
} :text
/DISCARD/ /* .data */: {
*(.data*)
*(.sdata*)
*(.gnu.linkonce.d.*)
*(.bss*)
*(.dynbss*)
*(.gnu.linkonce.b.*)
*(.ctors)
*(.dtors)
*(.jcr)
*(.init_array)
*(.init)
*(.fini)
*(.debug*)
*(.comment)
}
. = ALIGN(0x10);
.text : { *(.text .text*) } :text =0x90909090
}
VERSION
{
FBSD_1.7 {
global:
__vdso_sigcode;
local:
*;
};
}