| 1 | /*
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| 2 | * Copyright (c) 2009 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup genericdebug
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #include <stacktrace.h>
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| 36 | #include <interrupt.h>
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| 37 | #include <typedefs.h>
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| 38 | #include <symtab.h>
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| 39 |
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| 40 | #define STACK_FRAMES_MAX 20
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| 41 |
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| 42 | void
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| 43 | stack_trace_fp_pc(stack_trace_ops_t *ops, uintptr_t fp, uintptr_t pc)
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| 44 | {
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| 45 | int cnt = 0;
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| 46 | const char *symbol;
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| 47 | uintptr_t offset;
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| 48 |
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| 49 | while (cnt++ < STACK_FRAMES_MAX && ops->frame_pointer_validate(fp)) {
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| 50 | if (ops->symbol_resolve &&
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| 51 | ops->symbol_resolve(pc, &symbol, &offset)) {
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| 52 | if (offset)
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| 53 | printf("%p: %s+%p()\n", fp, symbol, offset);
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| 54 | else
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| 55 | printf("%p: %s()\n", fp, symbol);
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| 56 | } else {
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| 57 | printf("%p: %p()\n", fp, pc);
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| 58 | }
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| 59 | if (!ops->return_address_get(fp, &pc))
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| 60 | break;
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| 61 | if (!ops->frame_pointer_prev(fp, &fp))
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| 62 | break;
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| 63 | }
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| 64 | }
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| 65 |
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| 66 | void stack_trace(void)
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| 67 | {
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| 68 | stack_trace_fp_pc(&kst_ops, frame_pointer_get(), program_counter_get());
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| 69 |
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| 70 | /*
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| 71 | * Prevent the tail call optimization of the previous call by
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| 72 | * making it a non-tail call.
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| 73 | */
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| 74 | (void) frame_pointer_get();
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| 75 | }
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| 76 |
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| 77 | void stack_trace_istate(istate_t *istate)
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| 78 | {
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| 79 | if (istate_from_uspace(istate))
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| 80 | stack_trace_fp_pc(&ust_ops, istate_get_fp(istate),
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| 81 | istate_get_pc(istate));
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| 82 | else
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| 83 | stack_trace_fp_pc(&kst_ops, istate_get_fp(istate),
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| 84 | istate_get_pc(istate));
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| 85 | }
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| 86 |
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| 87 | static bool kernel_symbol_resolve(uintptr_t addr, const char **sp, uintptr_t *op)
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| 88 | {
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| 89 | return (symtab_name_lookup(addr, sp, op) == 0);
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| 90 | }
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| 91 |
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| 92 | stack_trace_ops_t kst_ops = {
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| 93 | .frame_pointer_validate = kernel_frame_pointer_validate,
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| 94 | .frame_pointer_prev = kernel_frame_pointer_prev,
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| 95 | .return_address_get = kernel_return_address_get,
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| 96 | .symbol_resolve = kernel_symbol_resolve
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| 97 | };
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| 98 |
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| 99 | stack_trace_ops_t ust_ops = {
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| 100 | .frame_pointer_validate = uspace_frame_pointer_validate,
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| 101 | .frame_pointer_prev = uspace_frame_pointer_prev,
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| 102 | .return_address_get = uspace_return_address_get,
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| 103 | .symbol_resolve = NULL
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| 104 | };
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| 105 |
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| 106 | /** @}
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| 107 | */
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