add poweroff command

hc

2023-12-14 982b8cc116118b3463d3f332581945625722acd8

 kernel/fs/Kconfig.binfmt
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+# SPDX-License-Identifier: GPL-2.0-only
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 menu "Executable file formats"
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 	depends on MMU
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 	select ELFCORE
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 	default y
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-	---help---
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+	help
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 	  ELF (Executable and Linkable Format) is a format for libraries and
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 	  executables used across different architectures and operating
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 	  systems. Saying Y here will enable your kernel to run ELF binaries
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 config ARCH_BINFMT_ELF_STATE
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 	bool
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+config ARCH_HAVE_ELF_PROT
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+	bool
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+
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+config ARCH_USE_GNU_PROPERTY
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+	bool
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+
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 config BINFMT_ELF_FDPIC
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 	bool "Kernel support for FDPIC ELF binaries"
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 	default y if !BINFMT_ELF
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-	depends on (ARM || (SUPERH32 && !MMU) || C6X)
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+	depends on (ARM || (SUPERH && !MMU) || C6X)
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 	select ELFCORE
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 	help
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 	  ELF FDPIC binaries are based on ELF, but allow the individual load
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@@ -71,7 +78,7 @@
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 	  The core dump behavior can be controlled per process using
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 	  the /proc/PID/coredump_filter pseudo-file; this setting is
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-	  inherited.  See Documentation/filesystems/proc.txt for details.
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+	  inherited.  See Documentation/filesystems/proc.rst for details.
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 	  This config option changes the default setting of coredump_filter
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 	  seen at boot time.  If unsure, say Y.
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@@ -90,11 +97,27 @@
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 	  Most systems will not boot if you say M or N here.  If unsure, say Y.
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+config ARCH_HAS_BINFMT_FLAT
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+	bool
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+
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 config BINFMT_FLAT
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 	bool "Kernel support for flat binaries"
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-	depends on !MMU || ARM || M68K
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+	depends on ARCH_HAS_BINFMT_FLAT
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 	help
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 	  Support uClinux FLAT format binaries.
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+
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+config BINFMT_FLAT_ARGVP_ENVP_ON_STACK
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+	bool
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+
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+config BINFMT_FLAT_OLD_ALWAYS_RAM
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+	bool
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+
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+config BINFMT_FLAT_OLD
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+	bool "Enable support for very old legacy flat binaries"
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+	depends on BINFMT_FLAT
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+	help
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+	  Support decade old uClinux FLAT format binaries.  Unless you know
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+	  you have some of those say N here.
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 config BINFMT_ZFLAT
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 	bool "Enable ZFLAT support"
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@@ -115,7 +138,7 @@
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 config BINFMT_AOUT
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 	tristate "Kernel support for a.out and ECOFF binaries"
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 	depends on HAVE_AOUT
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-	---help---
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+	help
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 	  A.out (Assembler.OUTput) is a set of formats for libraries and
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 	  executables used in the earliest versions of UNIX.  Linux used
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 	  the a.out formats QMAGIC and ZMAGIC until they were replaced
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 config BINFMT_EM86
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 	tristate "Kernel support for Linux/Intel ELF binaries"
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 	depends on ALPHA
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-	---help---
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+	help
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 	  Say Y here if you want to be able to execute Linux/Intel ELF
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 	  binaries just like native Alpha binaries on your Alpha machine. For
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 	  this to work, you need to have the emulator /usr/bin/em86 in place.
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 config BINFMT_MISC
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 	tristate "Kernel support for MISC binaries"
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-	---help---
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+	help
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 	  If you say Y here, it will be possible to plug wrapper-driven binary
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 	  formats into the kernel. You will like this especially when you use
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 	  programs that need an interpreter to run like Java, Python, .NET or