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https://source.denx.de/u-boot/u-boot.git
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139f5292e7
Extend Linux compat by adding kstrdup_const(), backed by lib/string.c. This leverages U-Boots .rodata section on ARM64 to avoid pointlessly duplicating const strings. This is used by the Linux CCF_FULL port and may be useful elsewhere in U-Boot. Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2011 The Chromium OS Authors.
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*/
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/* Taken from Linux kernel, commit f56c3196 */
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#ifndef _ASM_GENERIC_SECTIONS_H_
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#define _ASM_GENERIC_SECTIONS_H_
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#include <linux/types.h>
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#include <stdbool.h>
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/* References to section boundaries */
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extern char _text[], _stext[], _etext[];
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extern char _data[], _sdata[], _edata[];
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extern char __bss_start[], __bss_stop[];
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extern char __init_begin[], __init_end[];
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extern char _sinittext[], _einittext[];
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extern char _end[], _init[];
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extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
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extern char __kprobes_text_start[], __kprobes_text_end[];
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extern char __entry_text_start[], __entry_text_end[];
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extern char __initdata_begin[], __initdata_end[];
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extern char __start_rodata[], __end_rodata[];
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extern char __start_data[], __end_data[];
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extern char __efi_helloworld_begin[];
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extern char __efi_helloworld_end[];
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extern char __efi_var_file_begin[];
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extern char __efi_var_file_end[];
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extern char __efi_capsule_sig_begin[];
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extern char __efi_capsule_sig_end[];
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/* Private data used by of-platdata devices/uclasses */
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extern char __priv_data_start[], __priv_data_end[];
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/* Start and end of .ctors section - used for constructor calls. */
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extern char __ctors_start[], __ctors_end[];
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extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];
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extern char __efi_runtime_start[], __efi_runtime_stop[];
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/* function descriptor handling (if any). Override
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* in asm/sections.h */
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#ifndef dereference_function_descriptor
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#define dereference_function_descriptor(p) (p)
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#endif
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/* random extra sections (if any). Override
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* in asm/sections.h */
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#ifndef arch_is_kernel_text
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static inline int arch_is_kernel_text(unsigned long addr)
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{
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return 0;
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}
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#endif
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#ifndef arch_is_kernel_data
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static inline int arch_is_kernel_data(unsigned long addr)
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{
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return 0;
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}
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#endif
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/**
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* is_kernel_rodata - checks if the pointer address is located in the
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* .rodata section
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*
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* @addr: address to check
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*
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* Returns: true if the address is located in .rodata, false otherwise.
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*/
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static inline bool is_kernel_rodata(unsigned long addr)
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{
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#ifdef CONFIG_ARM64
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return addr >= (unsigned long)__start_rodata &&
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addr < (unsigned long)__end_rodata;
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#else
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return false;
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#endif
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}
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/* U-Boot-specific things begin here */
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/* Start of U-Boot text region */
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extern char __text_start[];
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extern char __text_end[];
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/* This marks the text region which must be relocated */
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extern char __image_copy_start[], __image_copy_end[];
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/* This marks the rcode region used for SPL relocation */
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extern char _rcode_start[], _rcode_end[];
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extern char __bss_end[];
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extern char __rel_dyn_start[], __rel_dyn_end[];
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extern char _image_binary_end[];
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/*
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* This is the U-Boot entry point - prior to relocation it should be same
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* as __text_start
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*/
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extern void _start(void);
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#ifndef USE_HOSTCC
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#if CONFIG_IS_ENABLED(RELOC_LOADER)
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#define __rcode __section(".text.rcode")
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#define __rdata __section(".text.rdata")
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#else
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#define __rcode
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#define __rdata
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#endif
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#else
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#define __rcode
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#define __rdata
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#endif
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#endif /* _ASM_GENERIC_SECTIONS_H_ */
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