C++ Exceptions for Smaller Firmware By: Khalil Estell (@kammce)@kammce Graduated 2017 from SJSU Ex-Googler (~6y) Volunteer @ SJSU ISO C++ Committee Member 2Motivation 345Microcontroller Constraints: std::inplace_vector: p0843r8 voted into C++26 @ St Louis 2024 ISO C++ meetingTIME SPACE So why do firmware developers avoid C++ exceptions? 14 Requires Dynamic Memory/Heap Increases Binary Size Requires Compiler is silent and removes RTTI, using C++ exceptions becomes UB 7576 TIME SPACE So why do firmware developers avoid C++ exceptions? Requires Dynamic Memory/Heap Increases Binary Size Requires whole

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Devices Requiring Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3 特別為 GNU/Linux 採購硬體 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.6.3 Systems with UEFI firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.6.4 Secure boot . . . . . . network-console . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 6.4 Loading Missing Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.4.1 Preparing a medium

Kernel Team recommendation . . . . . . . . . . . . . . . . . . . . 176 9.10.5 Hardware drivers and firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 9.11 Virtualized http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb-src http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb http://security.debian.org/debian-security org/debian-security bookworm-security main non-free-firmware ←� contrib non-free deb-src http://security.debian.org/debian-security bookworm-security main non-free-firmware ←� contrib non-free Alternatively, the

da equipa do kernel de Debian . . . . . . . . . . . . . 185 9.10.5 Controladores de hardware e firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 9.11 Sistema virtualizado http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb-src http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb http://security.debian.org/debian-security org/debian-security bookworm-security main non-free-firmware ←� contrib non-free deb-src http://security.debian.org/debian-security bookworm-security main non-free-firmware ←� contrib non-free Alternatively, the

metodo raccomandato dal Team del Kernel di Debian . . . . . . . . . 184 9.10.5 Driver per hardware e firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185 9.11 Sistema http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb-src http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb http://security.debian.org/debian-security org/debian-security bookworm-security main non-free-firmware ←� contrib non-free deb-src http://security.debian.org/debian-security bookworm-security main non-free-firmware ←� contrib non-free In alternativa l’elenco

container: modprobe: moduleName: 1 dirName: /opt 2 firmwarePath: /firmware 3 parameters: 4 - param=1 kernelMappings: 5 - literal: 6.0.15-300 内核模 内核模块 块管理 管理 OPERATOR 31 1 1 1 2 3 4 5 6 7 8 9 10 必需。 可选。 可选：在节点上将 /firmware/* 复制到 /var/lib/firmware/。 可选。 至少需要一个内核项。 对于运行与正则表达式匹配的内核的每个节点，KMM 创建一个 DaemonSet 资源，运行 containerImage 中指定的镜像，使用 在运行 modprobe 命令前，节点上的 .spec.moduleLoader.container.modprobe.firmwarePath 的内容 会被复制到节点上的 /var/lib/firmware 路径中。 在运行 modprobe -r 命令之前，所有文件和空目录都会从该位置中删除，以便在 pod 终止时卸载内核模 块。 moduleLoader: serviceAccountName:

.............................................................. 51 Upgrading the Cellular Modem Firmware ............................................................................................... .............................................................. 56 Updating Bootloader With the Firmware Binary ................................................................................ 56 Updating Cellular connection diagnosis tool • Cellular modem and network information • Cellular modem firmware upgrade with failback Interface Default Managed by MCM Network Configuration LAN1 Yes

Empfehlung des Debian-Kernel-Teams . . . . . . . . . . . . . . . 190 9.10.5 Hardware-Treiber und Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 9.11 Virtualisierte http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb-src http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb http://security.debian.org/debian-security org/debian-security bookworm-security main non-free-firmware ←� contrib non-free deb-src http://security.debian.org/debian-security bookworm-security main non-free-firmware ←� contrib non-free Alternatively, the

http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb-src http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb http://security.debian.org/debian-security org/debian-security bookworm-security main non-free-firmware ←� contrib non-free deb-src http://security.debian.org/debian-security bookworm-security main non-free-firmware ←� contrib non-free Alternativamente Components: main non-free-firmware contrib non-free Types: deb deb-src URIs: http://security.debian.org/debian-security/ Suites: bookworm-security Components: main non-free-firmware contrib non-free Los

系统以及内核的支持。基本的 framebuffer 由内核提 供，而桌面环境使用 X11。至于高级的显卡功能，比如 3D 硬件加速或硬件视频加速是否可用，由系统所 使用的具体显示硬件和所要安装的额外“固件 (firmware)”决定 (参阅第 2.2 节)。 几乎所有 ARM 机器都内置了图形硬件，而不用额外插卡。有些机器有扩展插槽用于显卡，但这比较 罕见。无头、无图像的硬件设计也很常见。虽然内核提供的基本帧缓冲显示在有图像的设备上应该都能 支持众多的硬件设备，比如：鼠标、打印机、扫描仪、PCMCIA 和 USB 设备。然而，在安装系统的 时候，并不需要其中的大部分设备。 2.2 需要固件的设备 除了需要设备驱动程序，有些硬件还要在使用之前加载 固件 (firmware) 或 微码 (microcode)。这对于网 卡 (特别是无线网卡) 来说很常见，但有些 USB 设备甚至是硬盘控制器也需要加载固件。 对于很多显卡来说，基本的功能不需要安装额外固件就可以使用，但是使用高级功能需要系统中安装 项目的标准，大多数情况下这些固件属于 non-free，不能被包含在主发行版 里面。如果设备驱动程序被包含到发行版里面，并且 Debian GNU/Linux 可以合法地发布固件，它通常被 单独地放置在仓库的 non-free-firmware 区（在 Debian GNU/Linux 12.0 之前为 non-free 区）里面。 不过，这并不意味着在安装过程中不能使用这些硬件。根据 2022 年关于非自由固件的一般性 决议，从 Debian