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5a45da02cf
* DWARF unwinder related
+ Force DWARF2 compliant .debug_frame (gcc 4.8 defaults to DWARF4
which kernel unwinder can't grok).
+ Discard the additional .eh_frame generated
+ Discard the dwarf4 debug info generated by -gdwarf-2 for normal
no debug case
* 4.8 already uses arc600 multilibs for -mno-mpy
* switch to using uclibc compiler (to get -mmedium-calls and -mno-sdata)
and also since buildroot can only use 1 toolchain
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
172 lines
3.5 KiB
ArmAsm
172 lines
3.5 KiB
ArmAsm
/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/cache.h>
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#include <asm/page.h>
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#include <asm/thread_info.h>
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OUTPUT_ARCH(arc)
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ENTRY(_stext)
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#ifdef CONFIG_CPU_BIG_ENDIAN
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jiffies = jiffies_64 + 4;
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#else
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jiffies = jiffies_64;
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#endif
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SECTIONS
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{
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/*
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* ICCM starts at 0x8000_0000. So if kernel is relocated to some other
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* address, make sure peripheral at 0x8z doesn't clash with ICCM
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* Essentially vector is also in ICCM.
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*/
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. = CONFIG_LINUX_LINK_BASE;
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_int_vec_base_lds = .;
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.vector : {
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*(.vector)
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. = ALIGN(PAGE_SIZE);
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}
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#ifdef CONFIG_ARC_HAS_ICCM
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.text.arcfp : {
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*(.text.arcfp)
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. = ALIGN(CONFIG_ARC_ICCM_SZ * 1024);
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}
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#endif
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/*
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* The reason for having a seperate subsection .init.ramfs is to
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* prevent objump from including it in kernel dumps
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*
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* Reason for having .init.ramfs above .init is to make sure that the
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* binary blob is tucked away to one side, reducing the displacement
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* between .init.text and .text, avoiding any possible relocation
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* errors because of calls from .init.text to .text
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* Yes such calls do exist. e.g.
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* decompress_inflate.c:gunzip( ) -> zlib_inflate_workspace( )
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*/
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__init_begin = .;
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.init.ramfs : { INIT_RAM_FS }
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. = ALIGN(PAGE_SIZE);
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_stext = .;
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HEAD_TEXT_SECTION
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INIT_TEXT_SECTION(L1_CACHE_BYTES)
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/* INIT_DATA_SECTION open-coded: special INIT_RAM_FS handling */
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.init.data : {
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INIT_DATA
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INIT_SETUP(L1_CACHE_BYTES)
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INIT_CALLS
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CON_INITCALL
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SECURITY_INITCALL
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}
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.init.arch.info : {
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__arch_info_begin = .;
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*(.arch.info.init)
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__arch_info_end = .;
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}
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PERCPU_SECTION(L1_CACHE_BYTES)
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/*
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* .exit.text is discard at runtime, not link time, to deal with
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* references from .debug_frame
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* It will be init freed, being inside [__init_start : __init_end]
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*/
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.exit.text : { EXIT_TEXT }
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.exit.data : { EXIT_DATA }
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. = ALIGN(PAGE_SIZE);
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__init_end = .;
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.text : {
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_text = .;
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TEXT_TEXT
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SCHED_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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*(.fixup)
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*(.gnu.warning)
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}
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EXCEPTION_TABLE(L1_CACHE_BYTES)
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_etext = .;
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_sdata = .;
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RO_DATA_SECTION(PAGE_SIZE)
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/*
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* 1. this is .data essentially
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* 2. THREAD_SIZE for init.task, must be kernel-stk sz aligned
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*/
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RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
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_edata = .;
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BSS_SECTION(0, 0, 0)
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#ifdef CONFIG_ARC_DW2_UNWIND
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. = ALIGN(PAGE_SIZE);
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.debug_frame : {
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__start_unwind = .;
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*(.debug_frame)
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__end_unwind = .;
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}
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/*
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* gcc 4.8 generates this for -fasynchonous-unwind-tables,
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* while we still use the .debug_frame based unwinder
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*/
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/DISCARD/ : { *(.eh_frame) }
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#else
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/DISCARD/ : { *(.debug_frame) }
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#endif
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NOTES
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. = ALIGN(PAGE_SIZE);
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_end = . ;
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STABS_DEBUG
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DISCARDS
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.arcextmap 0 : {
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*(.gnu.linkonce.arcextmap.*)
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*(.arcextmap.*)
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}
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#ifndef CONFIG_DEBUG_INFO
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/* open-coded because we need .debug_frame seperately for unwinding */
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/DISCARD/ : { *(.debug_aranges) }
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/DISCARD/ : { *(.debug_pubnames) }
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/DISCARD/ : { *(.debug_info) }
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/DISCARD/ : { *(.debug_abbrev) }
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/DISCARD/ : { *(.debug_line) }
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/DISCARD/ : { *(.debug_str) }
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/DISCARD/ : { *(.debug_loc) }
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/DISCARD/ : { *(.debug_macinfo) }
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/DISCARD/ : { *(.debug_ranges) }
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#endif
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#ifdef CONFIG_ARC_HAS_DCCM
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. = CONFIG_ARC_DCCM_BASE;
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__arc_dccm_base = .;
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.data.arcfp : {
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*(.data.arcfp)
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}
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. = ALIGN(CONFIG_ARC_DCCM_SZ * 1024);
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#endif
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}
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