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helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C From: Jason Andryuk To: CC: Jason Andryuk , Andrew Cooper , George Dunlap , "Jan Beulich" , Julien Grall , "Stefano Stabellini" Subject: [PATCH v7 1/2] libelf: Store maximum PHDR p_align Date: Thu, 4 Apr 2024 17:25:18 -0400 Message-ID: <20240404212519.16401-2-jason.andryuk@amd.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240404212519.16401-1-jason.andryuk@amd.com> References: <20240404212519.16401-1-jason.andryuk@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF0000013B:EE_|LV3PR12MB9235:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f13a03b-c939-4f15-29d4-08dc54edbe62 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Apr 2024 21:25:25.5198 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2f13a03b-c939-4f15-29d4-08dc54edbe62 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF0000013B.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR12MB9235 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1712265955286100005 Content-Type: text/plain; charset="utf-8" While parsing the PHDRs, store the maximum p_align value. This may be consulted for moving a PVH image's load address. Signed-off-by: Jason Andryuk Acked-by: Jan Beulich --- v6: New v7: Remove printing p_align. It may be confusing and is only useful when a PVH kernel needs to be moved. --- xen/common/libelf/libelf-loader.c | 5 +++++ xen/include/xen/libelf.h | 1 + 2 files changed, 6 insertions(+) diff --git a/xen/common/libelf/libelf-loader.c b/xen/common/libelf/libelf-l= oader.c index 629cc0d3e6..e571ea670e 100644 --- a/xen/common/libelf/libelf-loader.c +++ b/xen/common/libelf/libelf-loader.c @@ -468,6 +468,7 @@ void elf_parse_binary(struct elf_binary *elf) { ELF_HANDLE_DECL(elf_phdr) phdr; uint64_t low =3D -1, high =3D 0, paddr, memsz; + uint64_t max_align =3D 0, palign; unsigned i, count; =20 count =3D elf_phdr_count(elf); @@ -481,15 +482,19 @@ void elf_parse_binary(struct elf_binary *elf) continue; paddr =3D elf_uval(elf, phdr, p_paddr); memsz =3D elf_uval(elf, phdr, p_memsz); + palign =3D elf_uval(elf, phdr, p_align); elf_msg(elf, "ELF: phdr: paddr=3D%#" PRIx64 " memsz=3D%#" PRIx64 "= \n", paddr, memsz); if ( low > paddr ) low =3D paddr; if ( high < paddr + memsz ) high =3D paddr + memsz; + if ( max_align < palign ) + max_align =3D palign; } elf->pstart =3D low; elf->pend =3D high; + elf->palign =3D max_align; elf_msg(elf, "ELF: memory: %#" PRIx64 " -> %#" PRIx64 "\n", elf->pstart, elf->pend); } diff --git a/xen/include/xen/libelf.h b/xen/include/xen/libelf.h index 1c77e3df31..2d971f958e 100644 --- a/xen/include/xen/libelf.h +++ b/xen/include/xen/libelf.h @@ -196,6 +196,7 @@ struct elf_binary { size_t dest_size; uint64_t pstart; uint64_t pend; + uint64_t palign; uint64_t reloc_offset; =20 uint64_t bsd_symtab_pstart; --=20 2.44.0