mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 11:03:14 +00:00
8d29b7b9f8
Replace handcoded rcall instructions with the call pseudo-instruction. For kernels too far over 1MB the rcall instruction can't reach and linking will fail. We already call the final linker with --relax which converts call pseudo-instructions to the right things anyway. This fixes arch/avr32/kernel/built-in.o: In function `syscall_exit_work': (.ex.text+0x198): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `schedule' defined in .sched.text section in kernel/built-in.o arch/avr32/kernel/built-in.o: In function `fault_exit_work': (.ex.text+0x3b6): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `schedule' defined in .sched.text section in kernel/built-in.o But I'm still left with arch/avr32/kernel/built-in.o:(.fixup+0x2): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+45a arch/avr32/kernel/built-in.o:(.fixup+0x8): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+8ea arch/avr32/kernel/built-in.o:(.fixup+0xe): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+abe arch/avr32/kernel/built-in.o:(.fixup+0x14): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+ac8 arch/avr32/kernel/built-in.o:(.fixup+0x1a): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+ad2 arch/avr32/kernel/built-in.o:(.fixup+0x20): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+adc arch/avr32/kernel/built-in.o:(.fixup+0x26): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+ae6 arch/avr32/kernel/built-in.o:(.fixup+0x2c): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+af0 arch/avr32/kernel/built-in.o:(.fixup+0x32): additional relocation overflows omitted from the output These are caused by a similar problem with 'rjmp' instructions. Unfortunately, there's no easy fix for these at the moment since we don't have a arbitrary-range 'jmp' instruction similar to 'call'. Signed-off-by: Ben Nizette <bn@niasdigital.com> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
68 lines
1.2 KiB
ArmAsm
68 lines
1.2 KiB
ArmAsm
/*
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* Copy to/from userspace with optional address space checking.
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*
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* Copyright 2004-2006 Atmel Corporation
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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/page.h>
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#include <asm/thread_info.h>
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#include <asm/processor.h>
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#include <asm/asm.h>
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.text
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.align 1
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.global strnlen_user
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.type strnlen_user, "function"
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strnlen_user:
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branch_if_kernel r8, __strnlen_user
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sub r8, r11, 1
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add r8, r12
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retcs 0
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brmi adjust_length /* do a closer inspection */
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.global __strnlen_user
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.type __strnlen_user, "function"
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__strnlen_user:
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mov r10, r12
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10: ld.ub r8, r12++
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cp.w r8, 0
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breq 2f
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sub r11, 1
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brne 10b
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sub r12, -1
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2: sub r12, r10
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retal r12
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.type adjust_length, "function"
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adjust_length:
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cp.w r12, 0 /* addr must always be < TASK_SIZE */
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retmi 0
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pushm lr
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lddpc lr, _task_size
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sub r11, lr, r12
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mov r9, r11
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call __strnlen_user
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cp.w r12, r9
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brgt 1f
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popm pc
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1: popm pc, r12=0
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.align 2
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_task_size:
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.long TASK_SIZE
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.section .fixup, "ax"
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.align 1
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19: retal 0
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.section __ex_table, "a"
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.align 2
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.long 10b, 19b
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