diff options
Diffstat (limited to 'include/asm-generic/sections.h')
| -rw-r--r-- | include/asm-generic/sections.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h new file mode 100644 index 0000000000..cca1edb0c7 --- /dev/null +++ b/include/asm-generic/sections.h @@ -0,0 +1,117 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* Taken from Linux kernel, commit f56c3196 */ + +#ifndef _ASM_GENERIC_SECTIONS_H_ +#define _ASM_GENERIC_SECTIONS_H_ + +/* References to section boundaries */ + +extern char _text[], _stext[], _etext[]; +extern char _data[], _sdata[], _edata[]; +extern char __bss_start[], __bss_stop[]; +extern char __init_begin[], __init_end[]; +extern char _sinittext[], _einittext[]; +extern char _end[]; +extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[]; +extern char __kprobes_text_start[], __kprobes_text_end[]; +extern char __entry_text_start[], __entry_text_end[]; +extern char __initdata_begin[], __initdata_end[]; +extern char __start_rodata[], __end_rodata[]; + +/* Start and end of .ctors section - used for constructor calls. */ +extern char __ctors_start[], __ctors_end[]; + +/* function descriptor handling (if any). Override + * in asm/sections.h */ +#ifndef dereference_function_descriptor +#define dereference_function_descriptor(p) (p) +#endif + +/* random extra sections (if any). Override + * in asm/sections.h */ +#ifndef arch_is_kernel_text +static inline int arch_is_kernel_text(unsigned long addr) +{ + return 0; +} +#endif + +#ifndef arch_is_kernel_data +static inline int arch_is_kernel_data(unsigned long addr) +{ + return 0; +} +#endif + +/* U-Boot-specific things begin here */ + +/* Start of U-Boot text region */ +extern char __text_start[]; + +/* This marks the end of the text region which must be relocated */ +extern char __image_copy_end[]; + +/* + * This is the U-Boot entry point - prior to relocation it should be same + * as __text_start + */ +extern void _start(void); + +/* + * ARM needs to use offsets for symbols, since the values of some symbols + * are not resolved prior to relocation (and are just 0). Maybe this can be + * resolved, or maybe other architectures are similar, iwc this should be + * promoted to an architecture option. + */ +#ifdef CONFIG_ARM +#define CONFIG_SYS_SYM_OFFSETS +#endif + +#ifdef CONFIG_SYS_SYM_OFFSETS +/* Start/end of the relocation entries, as an offset from _start */ +extern ulong _rel_dyn_start_ofs; +extern ulong _rel_dyn_end_ofs; + +/* Start/end of the relocation symbol table, as an offset from _start */ +extern ulong _dynsym_start_ofs; + +/* End of the region to be relocated, as an offset form _start */ +extern ulong _image_copy_end_ofs; + +extern ulong _bss_start_ofs; /* BSS start relative to _start */ +extern ulong _bss_end_ofs; /* BSS end relative to _start */ +extern ulong _end_ofs; /* end of image relative to _start */ + +extern ulong _TEXT_BASE; /* code start */ + +#else /* don't use offsets: */ + +/* Exports from the Linker Script */ +extern ulong __data_end; +extern ulong __rel_dyn_start; +extern ulong __rel_dyn_end; +extern ulong __bss_end; + +extern ulong _TEXT_BASE; /* code start */ + +#endif + +#endif /* _ASM_GENERIC_SECTIONS_H_ */ |