From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 14 Jan 2026 16:07:19 +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 1vg2St-001Gxc-21 for lore@lore.pengutronix.de; Wed, 14 Jan 2026 16:07:19 +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 1vg2Ss-0000Gn-E5 for lore@pengutronix.de; Wed, 14 Jan 2026 16:07:19 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XxilGpYnhvNqWdkITJrZxvKL3jh68RaMlPbdl5gkpDY=; b=DSgC2IKOK860pGpJj7WXnYWNcO l4QFfahPnrnYoHE07clqCB/zUHccsx17O6BfE1UckjrHs/SEOfcKAUVx05dWEUl3kTZWO+yoGuiPO 7uCxuARFXeVpt1Zm3d0Z203/+gfIwzFsVVnThQDGE8Rc4pIZnH0Alm17kRnH8GzHZUs55phQU5HfE wMpYg7jVibOcypJtoTAyzFgdoKH8zy34QIIDz3N3IsE1RsBjOCyTb2/D/UDiu6cdNT6iYyqz7LZIm pLVHqPAOGL6gpRZD178SkRFZPvnj4nC6xu1VgSDO05vunXEVEqnBUKPBP0pTcoksplCmVyWnjowaB A9vd7psQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vg2SA-00000009ce2-278a; Wed, 14 Jan 2026 15:06:34 +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 1vg2S7-00000009cdM-3E4D for barebox@lists.infradead.org; Wed, 14 Jan 2026 15:06:33 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=[127.0.0.1]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1vg2S6-00009z-25; Wed, 14 Jan 2026 16:06:30 +0100 Message-ID: <1c1fe62d-238b-42a7-b285-8aa1d870b21d@pengutronix.de> Date: Wed, 14 Jan 2026 16:06:29 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Sascha Hauer , BAREBOX Cc: "Claude Sonnet 4.5" References: <20260114-pbl-load-elf-v4-0-0afa78d95a7e@pengutronix.de> <20260114-pbl-load-elf-v4-15-0afa78d95a7e@pengutronix.de> From: Ahmad Fatoum Content-Language: en-US, de-DE, de-BE In-Reply-To: <20260114-pbl-load-elf-v4-15-0afa78d95a7e@pengutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260114_070631_807488_04C79B73 X-CRM114-Status: GOOD ( 19.43 ) 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: , 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=-4.0 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: Re: [PATCH v4 15/22] ARM: linker script: create separate PT_LOAD segments for text, rodata, and data 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) On 1/14/26 1:14 PM, Sascha Hauer wrote: > Fix the linker scripts to generate three distinct PT_LOAD segments with > correct permissions instead of combining .rodata with .data. > > Before this fix, the linker auto-generated only two PT_LOAD segments: > 1. Text segment (PF_R|PF_X) > 2. Data segment (PF_R|PF_W) - containing .rodata, .data, .bss, etc. > > With explicit PHDRS directives, we now generate three segments: > 1. text segment (PF_R|PF_X): .text and related code sections > 2. rodata segment (PF_R): .rodata and unwind tables > 3. data segment (PF_R|PF_W): .data, .bss, and related sections > > With this we can setup the MMU properly from outside the ELF binary. > > 🤖 Generated with [Claude Code](https://claude.com/claude-code) > > Co-Authored-By: Claude Sonnet 4.5 > Signed-off-by: Sascha Hauer Reviewed-by: Ahmad Fatoum > --- > arch/arm/lib32/barebox.lds.S | 35 +++++++++++++++++++++++------------ > arch/arm/lib64/barebox.lds.S | 31 ++++++++++++++++++++----------- > 2 files changed, 43 insertions(+), 23 deletions(-) > > diff --git a/arch/arm/lib32/barebox.lds.S b/arch/arm/lib32/barebox.lds.S > index c704dd6d70f3ab157ceb67dfb14760e03f2a5d62..c09899361599dfc8d50b38e35b68c08f48ea9913 100644 > --- a/arch/arm/lib32/barebox.lds.S > +++ b/arch/arm/lib32/barebox.lds.S > @@ -7,14 +7,23 @@ > OUTPUT_FORMAT(BAREBOX_OUTPUT_FORMAT) > OUTPUT_ARCH(BAREBOX_OUTPUT_ARCH) > ENTRY(start) > + > +PHDRS > +{ > + text PT_LOAD FLAGS(5); /* PF_R | PF_X */ > + rodata PT_LOAD FLAGS(4); /* PF_R */ > + dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ > + data PT_LOAD FLAGS(6); /* PF_R | PF_W */ > +} > + > SECTIONS > { > . = 0x0; > - .image_start : { *(.__image_start) } > + .image_start : { *(.__image_start) } :text > > . = ALIGN(4); > > - ._text : { *(._text) } > + ._text : { *(._text) } :text > .text : > { > _stext = .; > @@ -27,7 +36,7 @@ SECTIONS > KEEP(*(.text_exceptions*)) > __exceptions_stop = .; > *(.text*) > - } > + } :text > BAREBOX_BARE_INIT_SIZE > > . = ALIGN(4096); > @@ -35,7 +44,7 @@ SECTIONS > .rodata : { > *(.rodata*) > RO_DATA_SECTION > - } > + } :rodata > > #ifdef CONFIG_ARM_UNWIND > /* > @@ -46,20 +55,22 @@ SECTIONS > __start_unwind_idx = .; > *(.ARM.exidx*) > __stop_unwind_idx = .; > - } > + } :rodata > .ARM.unwind_tab : { > __start_unwind_tab = .; > *(.ARM.extab*) > __stop_unwind_tab = .; > - } > + } :rodata > #endif > + .dynamic : { *(.dynamic) } :rodata :dynamic > + > . = ALIGN(4096); > + > __end_rodata = .; > _etext = .; > _sdata = .; > > - . = ALIGN(4); > - .data : { *(.data*) } > + .data : { *(.data*) } :data > > . = .; > > @@ -69,12 +80,12 @@ SECTIONS > > BAREBOX_EFI_RUNTIME > > - .image_end : { *(.__image_end) } > + .image_end : { *(.__image_end) } :data > > . = ALIGN(4); > - .__bss_start : { *(.__bss_start) } > - .bss : { *(.bss*) } > - .__bss_stop : { *(.__bss_stop) } > + .__bss_start : { *(.__bss_start) } :data > + .bss : { *(.bss*) } :data > + .__bss_stop : { *(.__bss_stop) } :data > > #ifdef CONFIG_ARM_SECURE_MONITOR > . = ALIGN(16); > diff --git a/arch/arm/lib64/barebox.lds.S b/arch/arm/lib64/barebox.lds.S > index 5ee5fbc3741e1f7644c00f9b37c0903c27704a3e..1ce2c67df03068e5328a41b394aa1bcbbe63c027 100644 > --- a/arch/arm/lib64/barebox.lds.S > +++ b/arch/arm/lib64/barebox.lds.S > @@ -6,14 +6,23 @@ > OUTPUT_FORMAT(BAREBOX_OUTPUT_FORMAT) > OUTPUT_ARCH(BAREBOX_OUTPUT_ARCH) > ENTRY(start) > + > +PHDRS > +{ > + text PT_LOAD FLAGS(5); /* PF_R | PF_X */ > + rodata PT_LOAD FLAGS(4); /* PF_R */ > + dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ > + data PT_LOAD FLAGS(6); /* PF_R | PF_W */ > +} > + > SECTIONS > { > . = 0x0; > > - .image_start : { *(.__image_start) } > + .image_start : { *(.__image_start) } :text > > . = ALIGN(4); > - ._text : { *(._text) } > + ._text : { *(._text) } :text > .text : > { > _stext = .; > @@ -22,7 +31,7 @@ SECTIONS > *(.text_bare_init*) > __bare_init_end = .; > *(.text*) > - } > + } :text > BAREBOX_BARE_INIT_SIZE > > . = ALIGN(4096); > @@ -30,7 +39,9 @@ SECTIONS > .rodata : { > *(.rodata*) > RO_DATA_SECTION > - } > + } :rodata > + > + .dynamic : { *(.dynamic) } :rodata :dynamic > > . = ALIGN(4096); > > @@ -38,20 +49,18 @@ SECTIONS > _etext = .; > _sdata = .; > > - .data : { *(.data*) } > - > - BAREBOX_RELOCATION_TABLE > + .data : { *(.data*) } :data > > _edata = .; > > BAREBOX_EFI_RUNTIME > > - .image_end : { *(.__image_end) } > + .image_end : { *(.__image_end) } :data > > . = ALIGN(4); > - .__bss_start : { *(.__bss_start) } > - .bss : { *(.bss*) } > - .__bss_stop : { *(.__bss_stop) } > + .__bss_start : { *(.__bss_start) } :data > + .bss : { *(.bss*) } :data > + .__bss_stop : { *(.__bss_stop) } :data > _end = .; > _barebox_image_size = __bss_start; > } > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |