From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 14 Jan 2026 13:15:12 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vfzmK-001EFS-2Y for lore@lore.pengutronix.de; Wed, 14 Jan 2026 13:15:12 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vfzmJ-0002Ae-0Y for lore@pengutronix.de; Wed, 14 Jan 2026 13:15:12 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:To: Content-Transfer-Encoding:Content-Type:MIME-Version:Message-Id:Date:Subject: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=G9Og0dclL+Jlb8uGjR1hZBDOB0R6TqU4Ent7Br8Sf8A=; b=R8uMewtY6NeJuc tu80k6Yes2OwbAgRyae4ADEBWk9QzDXRsHg9Bv1bQgbfx8Ivwnsy+TWd7rKlOLwTRYkNLMi1XZGOC aE+YRE8vcGvdEhC8Wy7FGqoHpA2JC6ht/b7zl6apJIZUjgvGqe2W6mFnaOHmSQylfcsQIP1RQvKTM Fsm1yzI5QMV1L8aY/8G9J2ayVLy96zhYnCSFrFKa/4O4YoVImIqz68/9ZITG0DVVz8xkYFCyATQRn T8XZ/bSdaQeHc0k3b2F7b/jd1TV4OB1OmZHikZ1DZdTETN6ILlc0ggCxLDEnibsyU0aP5D5BynD5f bHIR1YgHKBGNUMAtXBvw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vfzlk-0000000982m-1Wd1; Wed, 14 Jan 2026 12:14:36 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vfzlg-000000097yR-0QzI for barebox@lists.infradead.org; Wed, 14 Jan 2026 12:14:34 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vfzlc-0001iX-OW; Wed, 14 Jan 2026 13:14:28 +0100 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vfzld-000aPL-05; Wed, 14 Jan 2026 13:14:28 +0100 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1vfzlc-00000000TKs-0vYW; Wed, 14 Jan 2026 13:14:28 +0100 From: Sascha Hauer Date: Wed, 14 Jan 2026 13:14:25 +0100 Message-Id: <20260114-pbl-load-elf-v4-0-0afa78d95a7e@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAKGIZ2kC/23OQQ6DIBCF4asY1qWBQQW76j2aLgQHJTFqwBob4 92Lrqzt8n/JfJmFBPQOA7klC/E4ueD6LkZ6SYhpyq5G6qrYBBhkHEDSQbe07cuKYmup0anRzKC WlSLxZPBo3bxzj2fsxoWx9+9dn/i2blDOOMu+oYlTRrGQKhO2UCDgPmBXv0bfd26+Vkg2bYKjk J8EiEKqpDYyZ5al2V9BHAV1EsT2AyhTCG4Nl8WPsK7rB0pBlOExAQAA X-Change-ID: 20251227-pbl-load-elf-cb4cb0ceb7d8 To: BAREBOX X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1768392868; l=5559; i=s.hauer@pengutronix.de; s=20230412; h=from:subject:message-id; bh=OV1k3blrittdu3/ghaXddN2ltiVpJVRuZMbqItCIgQ0=; b=yxuNu6tzjzXWdK+HaUpmGbiXMJdqD6bu30abNQ3NQK7YB0Xi4PXqN2VC7nGx2d3dOFMlW3sye ClEqNZGNNTyC2Sfz0Rr2GlRZuWW+jTy+ZTYbLMi6riEqMAceSWOGjx9 X-Developer-Key: i=s.hauer@pengutronix.de; a=ed25519; pk=4kuc9ocmECiBJKWxYgqyhtZOHj5AWi7+d0n/UjhkwTg= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260114_041432_171029_85BADA2B X-CRM114-Status: GOOD ( 16.65 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Claude Sonnet 4.5" , Ahmad Fatoum Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.9 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v4 00/22] PBL: Add PBL ELF loading support with dynamic relocations X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Until now we linked the raw barebox proper binary into the PBL which comes with a number of disadvantages. We rely on self-modifying code to in barebox proper (relocate_to_current_adr()) and have no initialized bss segment (setup_c()). Also we can only mark the .text and .rodata as readonly during runtime of barebox proper. This series overcomes this by linking a ELF image into the PBL. This image is properly layed out, linked and initialized in the PBL. With this barebox proper has a proper C environment and text/rodata protection from the start. As a bonus this series also adds initial MMU support for RISCV, also based on loading the ELF image and configuring the MMU from the PBL. I lost track about the review feedback for v1, partly because I asked Claude to integrate the review feedback for me, which it did, but not completely. Nevertheless I think this series has enough changes for now so that it deserves a second look. What I didn't care about yet is that we found out that neither ARM nor RiscV use any absolute relocations, so we might be able to remove support for them, make sure these are not emitted during compile time, or properly test/fix them when we discover that they are indeed needed. Co-Authored-By: Claude Sonnet 4.5 Signed-off-by: Sascha Hauer --- Changes in v4: - remove --remove-section=.note.gnu.build-id, catched by --remove-section=.note* - actually use __image_* in remap_range_end_sans_image() - drop pbl_remap_range in favor of remap_range() - drop duplicate ELF entry point pr_debug() - add static inline wrapper for pbl_mmu_setup_from_elf() - reorder segments - make dynamic section RO - introduce elf_for_each_segment() - Use lowest vaddr segment for base address - Link to v3: https://lore.barebox.org/20260108-pbl-load-elf-v3-0-e28c931fc179@pengutronix.de Changes in v3: - integrate Ahmads feedback - cleanup barebox proper entry - add missing "ax" flag to ARM exception table, and let linker do the fixup - Link to v2: https://lore.barebox.org/20260106-pbl-load-elf-v2-0-487bc760f045@pengutronix.de Changes in v2: - rebased on Ahmads patches and with it reused existing relocate_image() - hopefully integrated all feedback for v1 - Link to v1: https://lore.barebox.org/20260105-pbl-load-elf-v1-0-e97853f98232@pengutronix.de --- Sascha Hauer (22): Makefile.compiler: add objcopy-option elf: only accept images matching the native ELF_CLASS elf: build for PBL as well elf: add elf segment iterator elf: add dynamic relocation support ARM: implement elf_apply_relocations() for ELF relocation support riscv: define generic relocate_image riscv: implement elf_apply_relocations() for ELF relocation support elf: implement elf_load_inplace() elf: create elf_open_binary_into() Makefile: add vmbarebox build target PBL: allow to link ELF image into PBL mmu: add MAP_CACHED_RO mapping type ARM: drop arm_fixup_vectors() ARM: linker script: create separate PT_LOAD segments for text, rodata, and data ARM: link ELF image into PBL ARM: cleanup barebox proper entry ARM: PBL: setup MMU with proper permissions from ELF segments riscv: linker script: create separate PT_LOAD segments for text, rodata, and data riscv: link ELF image into PBL riscv: Allwinner D1: Drop M-Mode riscv: add ELF segment-based memory protection with MMU Makefile | 14 +- arch/arm/Kconfig | 1 + arch/arm/cpu/exceptions_32.S | 54 +---- arch/arm/cpu/interrupts_32.c | 5 +- arch/arm/cpu/mmu-common.c | 31 ++- arch/arm/cpu/mmu-common.h | 3 +- arch/arm/cpu/mmu_32.c | 6 +- arch/arm/cpu/mmu_64.c | 2 +- arch/arm/cpu/no-mmu.c | 2 - arch/arm/cpu/start.c | 22 +- arch/arm/cpu/uncompress.c | 34 ++- arch/arm/include/asm/barebox-arm.h | 4 - arch/arm/include/asm/elf.h | 7 + arch/arm/lib32/barebox.lds.S | 42 ++-- arch/arm/lib32/reloc.c | 19 ++ arch/arm/lib64/barebox.lds.S | 38 ++-- arch/arm/lib64/reloc.c | 21 +- arch/riscv/Kconfig | 18 ++ arch/riscv/Kconfig.socs | 1 - arch/riscv/boot/start.c | 19 +- arch/riscv/boot/uncompress.c | 34 ++- arch/riscv/cpu/Makefile | 1 + arch/riscv/cpu/mmu.c | 354 +++++++++++++++++++++++++++++ arch/riscv/cpu/mmu.h | 120 ++++++++++ arch/riscv/include/asm/asm.h | 3 +- arch/riscv/include/asm/mmu.h | 36 +++ arch/riscv/lib/barebox.lds.S | 45 ++-- arch/riscv/lib/reloc.c | 43 ++-- common/Makefile | 2 +- common/elf.c | 446 +++++++++++++++++++++++++++++++++++-- include/elf.h | 79 +++++++ include/mmu.h | 3 +- include/pbl/mmu.h | 38 ++++ pbl/Kconfig | 9 + pbl/Makefile | 1 + pbl/mmu.c | 107 +++++++++ scripts/Makefile.compiler | 5 + 37 files changed, 1452 insertions(+), 217 deletions(-) --- base-commit: 2f99ee71fb44dc60b60d234fb38e0b3c6932f02b change-id: 20251227-pbl-load-elf-cb4cb0ceb7d8 Best regards, -- Sascha Hauer