3c835670ab
Arrange the sections in the FRV arch so that a BRA instruction with a 16-bit displacement can always reach from the trap table to entry.S, tlb-miss.S and break.S. The problem otherwise is that the linker can insert sufficient code between the slots in the trap table and the targets of the branch instructions in those slots that the displacement field in the instruction isn't sufficiently large. This is because the branch targets were in the .text section along with most of the other code in the kernel. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
187 lines
3.8 KiB
ArmAsm
187 lines
3.8 KiB
ArmAsm
/* ld script to make FRV Linux kernel
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* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
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*/
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OUTPUT_FORMAT("elf32-frv", "elf32-frv", "elf32-frv")
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OUTPUT_ARCH(frv)
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ENTRY(_start)
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/cache.h>
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#include <asm/thread_info.h>
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jiffies = jiffies_64 + 4;
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__page_offset = 0xc0000000; /* start of area covered by struct pages */
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__kernel_image_start = __page_offset; /* address at which kernel image resides */
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SECTIONS
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{
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. = __kernel_image_start;
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/* discardable initialisation code and data */
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. = ALIGN(PAGE_SIZE); /* Init code and data */
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__init_begin = .;
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_sinittext = .;
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.init.text : {
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*(.text.head)
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#ifndef CONFIG_DEBUG_INFO
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*(.init.text)
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*(.exit.text)
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*(.exit.data)
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*(.exitcall.exit)
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#endif
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}
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_einittext = .;
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.init.data : { *(.init.data) }
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. = ALIGN(8);
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__setup_start = .;
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.setup.init : { KEEP(*(.init.setup)) }
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__setup_end = .;
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__initcall_start = .;
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.initcall.init : {
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INITCALLS
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}
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__initcall_end = .;
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__con_initcall_start = .;
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.con_initcall.init : { *(.con_initcall.init) }
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__con_initcall_end = .;
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SECURITY_INIT
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. = ALIGN(4);
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__alt_instructions = .;
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.altinstructions : { *(.altinstructions) }
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__alt_instructions_end = .;
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.altinstr_replacement : { *(.altinstr_replacement) }
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PERCPU(4096)
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#ifdef CONFIG_BLK_DEV_INITRD
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. = ALIGN(4096);
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__initramfs_start = .;
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.init.ramfs : { *(.init.ramfs) }
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__initramfs_end = .;
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#endif
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. = ALIGN(THREAD_SIZE);
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__init_end = .;
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/* put sections together that have massive alignment issues */
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. = ALIGN(THREAD_SIZE);
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.data.init_task : {
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/* init task record & stack */
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*(.data.init_task)
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}
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. = ALIGN(4096);
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.data.page_aligned : { *(.data.idt) }
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. = ALIGN(L1_CACHE_BYTES);
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.data.cacheline_aligned : { *(.data.cacheline_aligned) }
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.trap : {
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/* trap table management - read entry-table.S before modifying */
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. = ALIGN(8192);
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__trap_tables = .;
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*(.trap.user)
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*(.trap.kernel)
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. = ALIGN(4096);
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*(.trap.break)
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}
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/* Text and read-only data */
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. = ALIGN(4);
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_text = .;
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_stext = .;
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.text : {
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*(.text.start)
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*(.text.entry)
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*(.text.break)
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*(.text.tlbmiss)
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TEXT_TEXT
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SCHED_TEXT
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LOCK_TEXT
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#ifdef CONFIG_DEBUG_INFO
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*(
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.init.text
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.exit.text
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.exitcall.exit
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)
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#endif
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*(.fixup)
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*(.gnu.warning)
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*(.exitcall.exit)
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} = 0x9090
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_etext = .; /* End of text section */
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RODATA
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.rodata : {
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*(.trap.vector)
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/* this clause must not be modified - the ordering and adjacency are imperative */
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__trap_fixup_tables = .;
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*(.trap.fixup.user .trap.fixup.kernel)
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}
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. = ALIGN(8); /* Exception table */
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__start___ex_table = .;
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__ex_table : { KEEP(*(__ex_table)) }
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__stop___ex_table = .;
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_sdata = .;
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.data : { /* Data */
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DATA_DATA
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*(.data.*)
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*(.exit.data)
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CONSTRUCTORS
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}
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_edata = .; /* End of data section */
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/* GP section */
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. = ALIGN(L1_CACHE_BYTES);
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_gp = . + 2048;
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PROVIDE (gp = _gp);
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.sdata : { *(.sdata .sdata.*) }
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/* BSS */
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. = ALIGN(L1_CACHE_BYTES);
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__bss_start = .;
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.sbss : { *(.sbss .sbss.*) }
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.bss : { *(.bss .bss.*) }
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.bss.stack : { *(.bss) }
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__bss_stop = .;
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_end = . ;
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. = ALIGN(PAGE_SIZE);
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__kernel_image_end = .;
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.debug_line 0 : { *(.debug_line) }
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.debug_info 0 : { *(.debug_info) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_frame 0 : { *(.debug_frame) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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.debug_str 0 : { *(.debug_str) }
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.debug_ranges 0 : { *(.debug_ranges) }
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.comment 0 : { *(.comment) }
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}
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__kernel_image_size_no_bss = __bss_start - __kernel_image_start;
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