47ad7b9bbe
This commit fixes a number of issues with the tile backtrace code. - Don't try to identify userspace shared object or executable paths if we are doing a backtrace from an interrupt; it's not legal, and also unlikely to be interesting. Likewise, don't try to do it for other address spaces, since d_path() assumes it is being called in "current" context. - Move "in_backtrace" from thread_struct to thread_info. This way we can access it even if our stack thread_info has been clobbered, which makes backtracing more robust. - Avoid using "current" directly when testing for is_sigreturn(). Since "current" may be corrupt, we're better off using kbt->task explicitly to look up the vdso_base for the current task. Conveniently, this simplifies the internal APIs (we only need one is_sigreturn() function now). - Avoid bogus "Odd fault" warning when pc/sp/ex1 are all zero, as is true for kernel threads above the last frame. - Hook into Tejun Heo's dump_stack() framework in lib/dump_stack.c. - Write last entry in save_stack_trace() as ULONG_MAX, not zero, since ftrace (at least) relies on finding that marker. - Implement save_stack_trace_regs() and save_strack_trace_user(), and set CONFIG_USER_STACKTRACE_SUPPORT. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*
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* Exports from assembler code and from libtile-cc.
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*/
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#include <linux/module.h>
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/* arch/tile/lib/usercopy.S */
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#include <linux/uaccess.h>
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EXPORT_SYMBOL(clear_user_asm);
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EXPORT_SYMBOL(flush_user_asm);
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EXPORT_SYMBOL(finv_user_asm);
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/* arch/tile/kernel/entry.S */
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#include <linux/kernel.h>
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#include <asm/processor.h>
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EXPORT_SYMBOL(current_text_addr);
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/* arch/tile/kernel/head.S */
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EXPORT_SYMBOL(empty_zero_page);
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#ifdef CONFIG_FUNCTION_TRACER
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/* arch/tile/kernel/mcount_64.S */
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#include <asm/ftrace.h>
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EXPORT_SYMBOL(__mcount);
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#endif /* CONFIG_FUNCTION_TRACER */
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/* arch/tile/lib/, various memcpy files */
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EXPORT_SYMBOL(memcpy);
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EXPORT_SYMBOL(__copy_to_user_inatomic);
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EXPORT_SYMBOL(__copy_from_user_inatomic);
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EXPORT_SYMBOL(__copy_from_user_zeroing);
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#ifdef __tilegx__
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EXPORT_SYMBOL(__copy_in_user_inatomic);
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#endif
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/* hypervisor glue */
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#include <hv/hypervisor.h>
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EXPORT_SYMBOL(hv_dev_open);
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EXPORT_SYMBOL(hv_dev_pread);
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EXPORT_SYMBOL(hv_dev_pwrite);
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EXPORT_SYMBOL(hv_dev_preada);
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EXPORT_SYMBOL(hv_dev_pwritea);
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EXPORT_SYMBOL(hv_dev_poll);
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EXPORT_SYMBOL(hv_dev_poll_cancel);
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EXPORT_SYMBOL(hv_dev_close);
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EXPORT_SYMBOL(hv_sysconf);
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EXPORT_SYMBOL(hv_confstr);
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EXPORT_SYMBOL(hv_get_rtc);
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EXPORT_SYMBOL(hv_set_rtc);
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/* libgcc.a */
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uint32_t __udivsi3(uint32_t dividend, uint32_t divisor);
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EXPORT_SYMBOL(__udivsi3);
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int32_t __divsi3(int32_t dividend, int32_t divisor);
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EXPORT_SYMBOL(__divsi3);
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uint64_t __udivdi3(uint64_t dividend, uint64_t divisor);
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EXPORT_SYMBOL(__udivdi3);
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int64_t __divdi3(int64_t dividend, int64_t divisor);
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EXPORT_SYMBOL(__divdi3);
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uint32_t __umodsi3(uint32_t dividend, uint32_t divisor);
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EXPORT_SYMBOL(__umodsi3);
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int32_t __modsi3(int32_t dividend, int32_t divisor);
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EXPORT_SYMBOL(__modsi3);
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uint64_t __umoddi3(uint64_t dividend, uint64_t divisor);
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EXPORT_SYMBOL(__umoddi3);
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int64_t __moddi3(int64_t dividend, int64_t divisor);
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EXPORT_SYMBOL(__moddi3);
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#ifndef __tilegx__
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int64_t __muldi3(int64_t, int64_t);
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EXPORT_SYMBOL(__muldi3);
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uint64_t __lshrdi3(uint64_t, unsigned int);
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EXPORT_SYMBOL(__lshrdi3);
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uint64_t __ashrdi3(uint64_t, unsigned int);
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EXPORT_SYMBOL(__ashrdi3);
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uint64_t __ashldi3(uint64_t, unsigned int);
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EXPORT_SYMBOL(__ashldi3);
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int __ffsdi2(uint64_t);
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EXPORT_SYMBOL(__ffsdi2);
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#endif
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