[279] | 1 | /*
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| 2 | * TCC - Tiny C Compiler - Support for -run switch
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| 3 | *
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| 4 | * Copyright (c) 2001-2004 Fabrice Bellard
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | */
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| 20 |
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| 21 | #include "tcc.h"
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| 22 |
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| 23 | /* only native compiler supports -run */
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| 24 | #ifdef TCC_IS_NATIVE
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| 25 |
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[331] | 26 | #ifndef _WIN32
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| 27 | # include <sys/mman.h>
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| 28 | #endif
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| 29 |
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[279] | 30 | #ifdef CONFIG_TCC_BACKTRACE
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[331] | 31 | # ifndef _WIN32
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| 32 | # include <signal.h>
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| 33 | # ifndef __OpenBSD__
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| 34 | # include <sys/ucontext.h>
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| 35 | # endif
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| 36 | # else
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| 37 | # define ucontext_t CONTEXT
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| 38 | # endif
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[279] | 39 | ST_DATA int rt_num_callers = 6;
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| 40 | ST_DATA const char **rt_bound_error_msg;
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| 41 | ST_DATA void *rt_prog_main;
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[331] | 42 | static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level);
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| 43 | static void rt_error(ucontext_t *uc, const char *fmt, ...);
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| 44 | static void set_exception_handler(void);
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[279] | 45 | #endif
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| 46 |
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| 47 | static void set_pages_executable(void *ptr, unsigned long length);
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[331] | 48 | static int tcc_relocate_ex(TCCState *s1, void *ptr, addr_t ptr_diff);
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[279] | 49 |
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| 50 | #ifdef _WIN64
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[331] | 51 | static void *win64_add_function_table(TCCState *s1);
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| 52 | static void win64_del_function_table(void *);
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[279] | 53 | #endif
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| 54 |
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| 55 | /* ------------------------------------------------------------- */
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| 56 | /* Do all relocations (needed before using tcc_get_symbol())
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| 57 | Returns -1 on error. */
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| 58 |
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| 59 | LIBTCCAPI int tcc_relocate(TCCState *s1, void *ptr)
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| 60 | {
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[331] | 61 | int size;
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| 62 | addr_t ptr_diff = 0;
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[279] | 63 |
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| 64 | if (TCC_RELOCATE_AUTO != ptr)
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[331] | 65 | return tcc_relocate_ex(s1, ptr, 0);
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[279] | 66 |
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[331] | 67 | size = tcc_relocate_ex(s1, NULL, 0);
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| 68 | if (size < 0)
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| 69 | return -1;
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[279] | 70 |
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| 71 | #ifdef HAVE_SELINUX
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[331] | 72 | {
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| 73 | /* Using mmap instead of malloc */
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| 74 | void *prx;
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| 75 | char tmpfname[] = "/tmp/.tccrunXXXXXX";
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| 76 | int fd = mkstemp(tmpfname);
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| 77 | unlink(tmpfname);
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| 78 | ftruncate(fd, size);
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[279] | 79 |
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[331] | 80 | ptr = mmap (NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
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| 81 | prx = mmap (NULL, size, PROT_READ|PROT_EXEC, MAP_SHARED, fd, 0);
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| 82 | if (ptr == MAP_FAILED || prx == MAP_FAILED)
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| 83 | tcc_error("tccrun: could not map memory");
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| 84 | dynarray_add(&s1->runtime_mem, &s1->nb_runtime_mem, (void*)(addr_t)size);
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| 85 | dynarray_add(&s1->runtime_mem, &s1->nb_runtime_mem, prx);
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| 86 | ptr_diff = (char*)prx - (char*)ptr;
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| 87 | }
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| 88 | #else
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| 89 | ptr = tcc_malloc(size);
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| 90 | #endif
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| 91 | tcc_relocate_ex(s1, ptr, ptr_diff); /* no more errors expected */
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| 92 | dynarray_add(&s1->runtime_mem, &s1->nb_runtime_mem, ptr);
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| 93 | return 0;
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| 94 | }
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[279] | 95 |
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[331] | 96 | ST_FUNC void tcc_run_free(TCCState *s1)
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| 97 | {
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| 98 | int i;
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[279] | 99 |
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[331] | 100 | for (i = 0; i < s1->nb_runtime_mem; ++i) {
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| 101 | #ifdef HAVE_SELINUX
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| 102 | unsigned size = (unsigned)(addr_t)s1->runtime_mem[i++];
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| 103 | munmap(s1->runtime_mem[i++], size);
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| 104 | munmap(s1->runtime_mem[i], size);
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[279] | 105 | #else
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[331] | 106 | #ifdef _WIN64
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| 107 | win64_del_function_table(*(void**)s1->runtime_mem[i]);
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[279] | 108 | #endif
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[331] | 109 | tcc_free(s1->runtime_mem[i]);
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| 110 | #endif
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| 111 | }
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| 112 | tcc_free(s1->runtime_mem);
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[279] | 113 | }
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| 114 |
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| 115 | /* launch the compiled program with the given arguments */
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| 116 | LIBTCCAPI int tcc_run(TCCState *s1, int argc, char **argv)
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| 117 | {
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| 118 | int (*prog_main)(int, char **);
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| 119 |
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[331] | 120 | s1->runtime_main = "main";
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| 121 | if ((s1->dflag & 16) && !find_elf_sym(s1->symtab, s1->runtime_main))
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| 122 | return 0;
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[279] | 123 | if (tcc_relocate(s1, TCC_RELOCATE_AUTO) < 0)
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| 124 | return -1;
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[331] | 125 | prog_main = tcc_get_symbol_err(s1, s1->runtime_main);
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[279] | 126 |
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| 127 | #ifdef CONFIG_TCC_BACKTRACE
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| 128 | if (s1->do_debug) {
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| 129 | set_exception_handler();
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| 130 | rt_prog_main = prog_main;
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| 131 | }
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| 132 | #endif
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| 133 |
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[331] | 134 | errno = 0; /* clean errno value */
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| 135 |
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[279] | 136 | #ifdef CONFIG_TCC_BCHECK
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| 137 | if (s1->do_bounds_check) {
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| 138 | void (*bound_init)(void);
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| 139 | void (*bound_exit)(void);
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[331] | 140 | void (*bound_new_region)(void *p, addr_t size);
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| 141 | int (*bound_delete_region)(void *p);
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| 142 | int i, ret;
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| 143 |
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[279] | 144 | /* set error function */
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| 145 | rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
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| 146 | /* XXX: use .init section so that it also work in binary ? */
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| 147 | bound_init = tcc_get_symbol_err(s1, "__bound_init");
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| 148 | bound_exit = tcc_get_symbol_err(s1, "__bound_exit");
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[331] | 149 | bound_new_region = tcc_get_symbol_err(s1, "__bound_new_region");
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| 150 | bound_delete_region = tcc_get_symbol_err(s1, "__bound_delete_region");
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| 151 |
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[279] | 152 | bound_init();
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[331] | 153 | /* mark argv area as valid */
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| 154 | bound_new_region(argv, argc*sizeof(argv[0]));
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| 155 | for (i=0; i<argc; ++i)
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| 156 | bound_new_region(argv[i], strlen(argv[i]) + 1);
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| 157 |
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[279] | 158 | ret = (*prog_main)(argc, argv);
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[331] | 159 |
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| 160 | /* unmark argv area */
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| 161 | for (i=0; i<argc; ++i)
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| 162 | bound_delete_region(argv[i]);
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| 163 | bound_delete_region(argv);
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[279] | 164 | bound_exit();
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[331] | 165 | return ret;
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| 166 | }
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[279] | 167 | #endif
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[331] | 168 | return (*prog_main)(argc, argv);
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[279] | 169 | }
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| 170 |
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[331] | 171 | #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
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| 172 | #define RUN_SECTION_ALIGNMENT 63
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| 173 | #else
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| 174 | #define RUN_SECTION_ALIGNMENT 15
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| 175 | #endif
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| 176 |
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[279] | 177 | /* relocate code. Return -1 on error, required size if ptr is NULL,
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| 178 | otherwise copy code into buffer passed by the caller */
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[331] | 179 | static int tcc_relocate_ex(TCCState *s1, void *ptr, addr_t ptr_diff)
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[279] | 180 | {
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| 181 | Section *s;
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[331] | 182 | unsigned offset, length, fill, i, k;
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[279] | 183 | addr_t mem;
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| 184 |
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| 185 | if (NULL == ptr) {
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| 186 | s1->nb_errors = 0;
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| 187 | #ifdef TCC_TARGET_PE
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| 188 | pe_output_file(s1, NULL);
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| 189 | #else
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| 190 | tcc_add_runtime(s1);
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[331] | 191 | resolve_common_syms(s1);
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[279] | 192 | build_got_entries(s1);
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| 193 | #endif
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| 194 | if (s1->nb_errors)
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| 195 | return -1;
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| 196 | }
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| 197 |
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| 198 | offset = 0, mem = (addr_t)ptr;
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[331] | 199 | fill = -mem & RUN_SECTION_ALIGNMENT;
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| 200 | #ifdef _WIN64
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| 201 | offset += sizeof (void*);
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| 202 | #endif
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| 203 | for (k = 0; k < 2; ++k) {
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| 204 | for(i = 1; i < s1->nb_sections; i++) {
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| 205 | s = s1->sections[i];
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| 206 | if (0 == (s->sh_flags & SHF_ALLOC))
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| 207 | continue;
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| 208 | if (k != !(s->sh_flags & SHF_EXECINSTR))
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| 209 | continue;
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| 210 | offset += fill;
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| 211 | if (!mem)
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| 212 | s->sh_addr = 0;
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| 213 | else if (s->sh_flags & SHF_EXECINSTR)
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| 214 | s->sh_addr = mem + offset + ptr_diff;
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| 215 | else
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| 216 | s->sh_addr = mem + offset;
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| 217 | #if 0
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| 218 | if (mem)
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| 219 | printf("%-16s +%02lx %p %04x\n",
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| 220 | s->name, fill, (void*)s->sh_addr, (unsigned)s->data_offset);
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| 221 | #endif
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| 222 | offset += s->data_offset;
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| 223 | fill = -(mem + offset) & 15;
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| 224 | }
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| 225 | #if RUN_SECTION_ALIGNMENT > 15
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| 226 | /* To avoid that x86 processors would reload cached instructions each time
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| 227 | when data is written in the near, we need to make sure that code and data
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| 228 | do not share the same 64 byte unit */
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| 229 | fill = -(mem + offset) & RUN_SECTION_ALIGNMENT;
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| 230 | #endif
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[279] | 231 | }
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| 232 |
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| 233 | /* relocate symbols */
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[331] | 234 | relocate_syms(s1, s1->symtab, 1);
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[279] | 235 | if (s1->nb_errors)
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| 236 | return -1;
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| 237 |
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[331] | 238 | if (0 == mem)
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| 239 | return offset + RUN_SECTION_ALIGNMENT;
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| 240 |
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| 241 | #ifdef TCC_TARGET_PE
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| 242 | s1->pe_imagebase = mem;
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[279] | 243 | #endif
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| 244 |
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| 245 | /* relocate each section */
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| 246 | for(i = 1; i < s1->nb_sections; i++) {
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| 247 | s = s1->sections[i];
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| 248 | if (s->reloc)
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| 249 | relocate_section(s1, s);
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| 250 | }
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[331] | 251 | relocate_plt(s1);
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[279] | 252 |
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| 253 | for(i = 1; i < s1->nb_sections; i++) {
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| 254 | s = s1->sections[i];
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| 255 | if (0 == (s->sh_flags & SHF_ALLOC))
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| 256 | continue;
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| 257 | length = s->data_offset;
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| 258 | ptr = (void*)s->sh_addr;
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[331] | 259 | if (s->sh_flags & SHF_EXECINSTR)
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| 260 | ptr = (char*)ptr - ptr_diff;
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[279] | 261 | if (NULL == s->data || s->sh_type == SHT_NOBITS)
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| 262 | memset(ptr, 0, length);
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| 263 | else
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| 264 | memcpy(ptr, s->data, length);
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| 265 | /* mark executable sections as executable in memory */
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| 266 | if (s->sh_flags & SHF_EXECINSTR)
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[331] | 267 | set_pages_executable((char*)ptr + ptr_diff, length);
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[279] | 268 | }
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| 269 |
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[331] | 270 | #ifdef _WIN64
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| 271 | *(void**)mem = win64_add_function_table(s1);
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[279] | 272 | #endif
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| 273 |
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| 274 | return 0;
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| 275 | }
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| 276 |
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| 277 | /* ------------------------------------------------------------- */
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| 278 | /* allow to run code in memory */
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| 279 |
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| 280 | static void set_pages_executable(void *ptr, unsigned long length)
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| 281 | {
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| 282 | #ifdef _WIN32
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| 283 | unsigned long old_protect;
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| 284 | VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
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| 285 | #else
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[331] | 286 | void __clear_cache(void *beginning, void *end);
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| 287 | # ifndef HAVE_SELINUX
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[279] | 288 | addr_t start, end;
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[331] | 289 | # ifndef PAGESIZE
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| 290 | # define PAGESIZE 4096
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| 291 | # endif
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[279] | 292 | start = (addr_t)ptr & ~(PAGESIZE - 1);
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| 293 | end = (addr_t)ptr + length;
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| 294 | end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
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[331] | 295 | if (mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC))
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| 296 | tcc_error("mprotect failed: did you mean to configure --with-selinux?");
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| 297 | # endif
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| 298 | # if defined TCC_TARGET_ARM || defined TCC_TARGET_ARM64
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| 299 | __clear_cache(ptr, (char *)ptr + length);
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| 300 | # endif
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[279] | 301 | #endif
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| 302 | }
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| 303 |
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[331] | 304 | #ifdef _WIN64
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| 305 | static void *win64_add_function_table(TCCState *s1)
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| 306 | {
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| 307 | void *p = NULL;
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| 308 | if (s1->uw_pdata) {
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| 309 | p = (void*)s1->uw_pdata->sh_addr;
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| 310 | RtlAddFunctionTable(
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| 311 | (RUNTIME_FUNCTION*)p,
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| 312 | s1->uw_pdata->data_offset / sizeof (RUNTIME_FUNCTION),
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| 313 | s1->pe_imagebase
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| 314 | );
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| 315 | s1->uw_pdata = NULL;
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| 316 | }
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| 317 | return p;
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| 318 | }
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| 319 |
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| 320 | static void win64_del_function_table(void *p)
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| 321 | {
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| 322 | if (p) {
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| 323 | RtlDeleteFunctionTable((RUNTIME_FUNCTION*)p);
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| 324 | }
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| 325 | }
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| 326 | #endif
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| 327 |
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[279] | 328 | /* ------------------------------------------------------------- */
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| 329 | #ifdef CONFIG_TCC_BACKTRACE
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| 330 |
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| 331 | ST_FUNC void tcc_set_num_callers(int n)
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| 332 | {
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| 333 | rt_num_callers = n;
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| 334 | }
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| 335 |
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| 336 | /* print the position in the source file of PC value 'pc' by reading
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| 337 | the stabs debug information */
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| 338 | static addr_t rt_printline(addr_t wanted_pc, const char *msg)
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| 339 | {
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| 340 | char func_name[128], last_func_name[128];
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| 341 | addr_t func_addr, last_pc, pc;
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| 342 | const char *incl_files[INCLUDE_STACK_SIZE];
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| 343 | int incl_index, len, last_line_num, i;
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| 344 | const char *str, *p;
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| 345 |
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| 346 | Stab_Sym *stab_sym = NULL, *stab_sym_end, *sym;
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| 347 | int stab_len = 0;
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| 348 | char *stab_str = NULL;
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| 349 |
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| 350 | if (stab_section) {
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| 351 | stab_len = stab_section->data_offset;
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| 352 | stab_sym = (Stab_Sym *)stab_section->data;
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[331] | 353 | stab_str = (char *) stabstr_section->data;
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[279] | 354 | }
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| 355 |
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| 356 | func_name[0] = '\0';
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| 357 | func_addr = 0;
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| 358 | incl_index = 0;
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| 359 | last_func_name[0] = '\0';
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| 360 | last_pc = (addr_t)-1;
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| 361 | last_line_num = 1;
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| 362 |
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| 363 | if (!stab_sym)
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| 364 | goto no_stabs;
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| 365 |
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| 366 | stab_sym_end = (Stab_Sym*)((char*)stab_sym + stab_len);
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| 367 | for (sym = stab_sym + 1; sym < stab_sym_end; ++sym) {
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| 368 | switch(sym->n_type) {
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| 369 | /* function start or end */
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| 370 | case N_FUN:
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| 371 | if (sym->n_strx == 0) {
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| 372 | /* we test if between last line and end of function */
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| 373 | pc = sym->n_value + func_addr;
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| 374 | if (wanted_pc >= last_pc && wanted_pc < pc)
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| 375 | goto found;
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| 376 | func_name[0] = '\0';
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| 377 | func_addr = 0;
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| 378 | } else {
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| 379 | str = stab_str + sym->n_strx;
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| 380 | p = strchr(str, ':');
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| 381 | if (!p) {
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| 382 | pstrcpy(func_name, sizeof(func_name), str);
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| 383 | } else {
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| 384 | len = p - str;
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| 385 | if (len > sizeof(func_name) - 1)
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| 386 | len = sizeof(func_name) - 1;
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| 387 | memcpy(func_name, str, len);
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| 388 | func_name[len] = '\0';
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| 389 | }
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| 390 | func_addr = sym->n_value;
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| 391 | }
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| 392 | break;
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| 393 | /* line number info */
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| 394 | case N_SLINE:
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| 395 | pc = sym->n_value + func_addr;
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| 396 | if (wanted_pc >= last_pc && wanted_pc < pc)
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| 397 | goto found;
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| 398 | last_pc = pc;
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| 399 | last_line_num = sym->n_desc;
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| 400 | /* XXX: slow! */
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| 401 | strcpy(last_func_name, func_name);
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| 402 | break;
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| 403 | /* include files */
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| 404 | case N_BINCL:
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| 405 | str = stab_str + sym->n_strx;
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| 406 | add_incl:
|
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| 407 | if (incl_index < INCLUDE_STACK_SIZE) {
|
---|
| 408 | incl_files[incl_index++] = str;
|
---|
| 409 | }
|
---|
| 410 | break;
|
---|
| 411 | case N_EINCL:
|
---|
| 412 | if (incl_index > 1)
|
---|
| 413 | incl_index--;
|
---|
| 414 | break;
|
---|
| 415 | case N_SO:
|
---|
| 416 | if (sym->n_strx == 0) {
|
---|
| 417 | incl_index = 0; /* end of translation unit */
|
---|
| 418 | } else {
|
---|
| 419 | str = stab_str + sym->n_strx;
|
---|
| 420 | /* do not add path */
|
---|
| 421 | len = strlen(str);
|
---|
| 422 | if (len > 0 && str[len - 1] != '/')
|
---|
| 423 | goto add_incl;
|
---|
| 424 | }
|
---|
| 425 | break;
|
---|
| 426 | }
|
---|
| 427 | }
|
---|
| 428 |
|
---|
| 429 | no_stabs:
|
---|
| 430 | /* second pass: we try symtab symbols (no line number info) */
|
---|
| 431 | incl_index = 0;
|
---|
| 432 | if (symtab_section)
|
---|
| 433 | {
|
---|
| 434 | ElfW(Sym) *sym, *sym_end;
|
---|
| 435 | int type;
|
---|
| 436 |
|
---|
| 437 | sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
|
---|
| 438 | for(sym = (ElfW(Sym) *)symtab_section->data + 1;
|
---|
| 439 | sym < sym_end;
|
---|
| 440 | sym++) {
|
---|
| 441 | type = ELFW(ST_TYPE)(sym->st_info);
|
---|
| 442 | if (type == STT_FUNC || type == STT_GNU_IFUNC) {
|
---|
| 443 | if (wanted_pc >= sym->st_value &&
|
---|
| 444 | wanted_pc < sym->st_value + sym->st_size) {
|
---|
| 445 | pstrcpy(last_func_name, sizeof(last_func_name),
|
---|
[331] | 446 | (char *) symtab_section->link->data + sym->st_name);
|
---|
[279] | 447 | func_addr = sym->st_value;
|
---|
| 448 | goto found;
|
---|
| 449 | }
|
---|
| 450 | }
|
---|
| 451 | }
|
---|
| 452 | }
|
---|
| 453 | /* did not find any info: */
|
---|
| 454 | fprintf(stderr, "%s %p ???\n", msg, (void*)wanted_pc);
|
---|
| 455 | fflush(stderr);
|
---|
| 456 | return 0;
|
---|
| 457 | found:
|
---|
| 458 | i = incl_index;
|
---|
| 459 | if (i > 0)
|
---|
| 460 | fprintf(stderr, "%s:%d: ", incl_files[--i], last_line_num);
|
---|
| 461 | fprintf(stderr, "%s %p", msg, (void*)wanted_pc);
|
---|
| 462 | if (last_func_name[0] != '\0')
|
---|
| 463 | fprintf(stderr, " %s()", last_func_name);
|
---|
| 464 | if (--i >= 0) {
|
---|
| 465 | fprintf(stderr, " (included from ");
|
---|
| 466 | for (;;) {
|
---|
| 467 | fprintf(stderr, "%s", incl_files[i]);
|
---|
| 468 | if (--i < 0)
|
---|
| 469 | break;
|
---|
| 470 | fprintf(stderr, ", ");
|
---|
| 471 | }
|
---|
| 472 | fprintf(stderr, ")");
|
---|
| 473 | }
|
---|
| 474 | fprintf(stderr, "\n");
|
---|
| 475 | fflush(stderr);
|
---|
| 476 | return func_addr;
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | /* emit a run time error at position 'pc' */
|
---|
| 480 | static void rt_error(ucontext_t *uc, const char *fmt, ...)
|
---|
| 481 | {
|
---|
| 482 | va_list ap;
|
---|
| 483 | addr_t pc;
|
---|
| 484 | int i;
|
---|
| 485 |
|
---|
| 486 | fprintf(stderr, "Runtime error: ");
|
---|
| 487 | va_start(ap, fmt);
|
---|
| 488 | vfprintf(stderr, fmt, ap);
|
---|
| 489 | va_end(ap);
|
---|
| 490 | fprintf(stderr, "\n");
|
---|
| 491 |
|
---|
| 492 | for(i=0;i<rt_num_callers;i++) {
|
---|
| 493 | if (rt_get_caller_pc(&pc, uc, i) < 0)
|
---|
| 494 | break;
|
---|
| 495 | pc = rt_printline(pc, i ? "by" : "at");
|
---|
| 496 | if (pc == (addr_t)rt_prog_main && pc)
|
---|
| 497 | break;
|
---|
| 498 | }
|
---|
| 499 | }
|
---|
| 500 |
|
---|
| 501 | /* ------------------------------------------------------------- */
|
---|
| 502 | #ifndef _WIN32
|
---|
| 503 |
|
---|
| 504 | /* signal handler for fatal errors */
|
---|
| 505 | static void sig_error(int signum, siginfo_t *siginf, void *puc)
|
---|
| 506 | {
|
---|
| 507 | ucontext_t *uc = puc;
|
---|
| 508 |
|
---|
| 509 | switch(signum) {
|
---|
| 510 | case SIGFPE:
|
---|
| 511 | switch(siginf->si_code) {
|
---|
| 512 | case FPE_INTDIV:
|
---|
| 513 | case FPE_FLTDIV:
|
---|
| 514 | rt_error(uc, "division by zero");
|
---|
| 515 | break;
|
---|
| 516 | default:
|
---|
| 517 | rt_error(uc, "floating point exception");
|
---|
| 518 | break;
|
---|
| 519 | }
|
---|
| 520 | break;
|
---|
| 521 | case SIGBUS:
|
---|
| 522 | case SIGSEGV:
|
---|
| 523 | if (rt_bound_error_msg && *rt_bound_error_msg)
|
---|
| 524 | rt_error(uc, *rt_bound_error_msg);
|
---|
| 525 | else
|
---|
| 526 | rt_error(uc, "dereferencing invalid pointer");
|
---|
| 527 | break;
|
---|
| 528 | case SIGILL:
|
---|
| 529 | rt_error(uc, "illegal instruction");
|
---|
| 530 | break;
|
---|
| 531 | case SIGABRT:
|
---|
| 532 | rt_error(uc, "abort() called");
|
---|
| 533 | break;
|
---|
| 534 | default:
|
---|
| 535 | rt_error(uc, "caught signal %d", signum);
|
---|
| 536 | break;
|
---|
| 537 | }
|
---|
| 538 | exit(255);
|
---|
| 539 | }
|
---|
| 540 |
|
---|
| 541 | #ifndef SA_SIGINFO
|
---|
| 542 | # define SA_SIGINFO 0x00000004u
|
---|
| 543 | #endif
|
---|
| 544 |
|
---|
| 545 | /* Generate a stack backtrace when a CPU exception occurs. */
|
---|
| 546 | static void set_exception_handler(void)
|
---|
| 547 | {
|
---|
| 548 | struct sigaction sigact;
|
---|
| 549 | /* install TCC signal handlers to print debug info on fatal
|
---|
| 550 | runtime errors */
|
---|
| 551 | sigact.sa_flags = SA_SIGINFO | SA_RESETHAND;
|
---|
[331] | 552 | sigact.sa_sigaction = sig_error;
|
---|
[279] | 553 | sigemptyset(&sigact.sa_mask);
|
---|
| 554 | sigaction(SIGFPE, &sigact, NULL);
|
---|
| 555 | sigaction(SIGILL, &sigact, NULL);
|
---|
| 556 | sigaction(SIGSEGV, &sigact, NULL);
|
---|
| 557 | sigaction(SIGBUS, &sigact, NULL);
|
---|
| 558 | sigaction(SIGABRT, &sigact, NULL);
|
---|
| 559 | }
|
---|
| 560 |
|
---|
| 561 | /* ------------------------------------------------------------- */
|
---|
| 562 | #ifdef __i386__
|
---|
| 563 |
|
---|
| 564 | /* fix for glibc 2.1 */
|
---|
| 565 | #ifndef REG_EIP
|
---|
| 566 | #define REG_EIP EIP
|
---|
| 567 | #define REG_EBP EBP
|
---|
| 568 | #endif
|
---|
| 569 |
|
---|
| 570 | /* return the PC at frame level 'level'. Return negative if not found */
|
---|
| 571 | static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
|
---|
| 572 | {
|
---|
| 573 | addr_t fp;
|
---|
| 574 | int i;
|
---|
| 575 |
|
---|
| 576 | if (level == 0) {
|
---|
| 577 | #if defined(__APPLE__)
|
---|
| 578 | *paddr = uc->uc_mcontext->__ss.__eip;
|
---|
[331] | 579 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
|
---|
[279] | 580 | *paddr = uc->uc_mcontext.mc_eip;
|
---|
| 581 | #elif defined(__dietlibc__)
|
---|
| 582 | *paddr = uc->uc_mcontext.eip;
|
---|
[331] | 583 | #elif defined(__NetBSD__)
|
---|
| 584 | *paddr = uc->uc_mcontext.__gregs[_REG_EIP];
|
---|
| 585 | #elif defined(__OpenBSD__)
|
---|
| 586 | *paddr = uc->sc_eip;
|
---|
[279] | 587 | #else
|
---|
| 588 | *paddr = uc->uc_mcontext.gregs[REG_EIP];
|
---|
| 589 | #endif
|
---|
| 590 | return 0;
|
---|
| 591 | } else {
|
---|
| 592 | #if defined(__APPLE__)
|
---|
| 593 | fp = uc->uc_mcontext->__ss.__ebp;
|
---|
[331] | 594 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
|
---|
[279] | 595 | fp = uc->uc_mcontext.mc_ebp;
|
---|
| 596 | #elif defined(__dietlibc__)
|
---|
| 597 | fp = uc->uc_mcontext.ebp;
|
---|
[331] | 598 | #elif defined(__NetBSD__)
|
---|
| 599 | fp = uc->uc_mcontext.__gregs[_REG_EBP];
|
---|
| 600 | #elif defined(__OpenBSD__)
|
---|
| 601 | *paddr = uc->sc_ebp;
|
---|
[279] | 602 | #else
|
---|
| 603 | fp = uc->uc_mcontext.gregs[REG_EBP];
|
---|
| 604 | #endif
|
---|
| 605 | for(i=1;i<level;i++) {
|
---|
| 606 | /* XXX: check address validity with program info */
|
---|
| 607 | if (fp <= 0x1000 || fp >= 0xc0000000)
|
---|
| 608 | return -1;
|
---|
| 609 | fp = ((addr_t *)fp)[0];
|
---|
| 610 | }
|
---|
| 611 | *paddr = ((addr_t *)fp)[1];
|
---|
| 612 | return 0;
|
---|
| 613 | }
|
---|
| 614 | }
|
---|
| 615 |
|
---|
| 616 | /* ------------------------------------------------------------- */
|
---|
| 617 | #elif defined(__x86_64__)
|
---|
| 618 |
|
---|
| 619 | /* return the PC at frame level 'level'. Return negative if not found */
|
---|
| 620 | static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
|
---|
| 621 | {
|
---|
| 622 | addr_t fp;
|
---|
| 623 | int i;
|
---|
| 624 |
|
---|
| 625 | if (level == 0) {
|
---|
| 626 | /* XXX: only support linux */
|
---|
| 627 | #if defined(__APPLE__)
|
---|
| 628 | *paddr = uc->uc_mcontext->__ss.__rip;
|
---|
[331] | 629 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
|
---|
[279] | 630 | *paddr = uc->uc_mcontext.mc_rip;
|
---|
[331] | 631 | #elif defined(__NetBSD__)
|
---|
| 632 | *paddr = uc->uc_mcontext.__gregs[_REG_RIP];
|
---|
[279] | 633 | #else
|
---|
| 634 | *paddr = uc->uc_mcontext.gregs[REG_RIP];
|
---|
| 635 | #endif
|
---|
| 636 | return 0;
|
---|
| 637 | } else {
|
---|
| 638 | #if defined(__APPLE__)
|
---|
| 639 | fp = uc->uc_mcontext->__ss.__rbp;
|
---|
[331] | 640 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
|
---|
[279] | 641 | fp = uc->uc_mcontext.mc_rbp;
|
---|
[331] | 642 | #elif defined(__NetBSD__)
|
---|
| 643 | fp = uc->uc_mcontext.__gregs[_REG_RBP];
|
---|
[279] | 644 | #else
|
---|
| 645 | fp = uc->uc_mcontext.gregs[REG_RBP];
|
---|
| 646 | #endif
|
---|
| 647 | for(i=1;i<level;i++) {
|
---|
| 648 | /* XXX: check address validity with program info */
|
---|
| 649 | if (fp <= 0x1000)
|
---|
| 650 | return -1;
|
---|
| 651 | fp = ((addr_t *)fp)[0];
|
---|
| 652 | }
|
---|
| 653 | *paddr = ((addr_t *)fp)[1];
|
---|
| 654 | return 0;
|
---|
| 655 | }
|
---|
| 656 | }
|
---|
| 657 |
|
---|
| 658 | /* ------------------------------------------------------------- */
|
---|
| 659 | #elif defined(__arm__)
|
---|
| 660 |
|
---|
| 661 | /* return the PC at frame level 'level'. Return negative if not found */
|
---|
| 662 | static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
|
---|
| 663 | {
|
---|
| 664 | addr_t fp, sp;
|
---|
| 665 | int i;
|
---|
| 666 |
|
---|
| 667 | if (level == 0) {
|
---|
| 668 | /* XXX: only supports linux */
|
---|
| 669 | #if defined(__linux__)
|
---|
| 670 | *paddr = uc->uc_mcontext.arm_pc;
|
---|
| 671 | #else
|
---|
| 672 | return -1;
|
---|
| 673 | #endif
|
---|
| 674 | return 0;
|
---|
| 675 | } else {
|
---|
| 676 | #if defined(__linux__)
|
---|
| 677 | fp = uc->uc_mcontext.arm_fp;
|
---|
| 678 | sp = uc->uc_mcontext.arm_sp;
|
---|
| 679 | if (sp < 0x1000)
|
---|
| 680 | sp = 0x1000;
|
---|
| 681 | #else
|
---|
| 682 | return -1;
|
---|
| 683 | #endif
|
---|
| 684 | /* XXX: specific to tinycc stack frames */
|
---|
| 685 | if (fp < sp + 12 || fp & 3)
|
---|
| 686 | return -1;
|
---|
| 687 | for(i = 1; i < level; i++) {
|
---|
| 688 | sp = ((addr_t *)fp)[-2];
|
---|
| 689 | if (sp < fp || sp - fp > 16 || sp & 3)
|
---|
| 690 | return -1;
|
---|
| 691 | fp = ((addr_t *)fp)[-3];
|
---|
| 692 | if (fp <= sp || fp - sp < 12 || fp & 3)
|
---|
| 693 | return -1;
|
---|
| 694 | }
|
---|
| 695 | /* XXX: check address validity with program info */
|
---|
| 696 | *paddr = ((addr_t *)fp)[-1];
|
---|
| 697 | return 0;
|
---|
| 698 | }
|
---|
| 699 | }
|
---|
| 700 |
|
---|
| 701 | /* ------------------------------------------------------------- */
|
---|
[331] | 702 | #elif defined(__aarch64__)
|
---|
| 703 |
|
---|
| 704 | static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
|
---|
| 705 | {
|
---|
| 706 | if (level < 0)
|
---|
| 707 | return -1;
|
---|
| 708 | else if (level == 0) {
|
---|
| 709 | *paddr = uc->uc_mcontext.pc;
|
---|
| 710 | return 0;
|
---|
| 711 | }
|
---|
| 712 | else {
|
---|
| 713 | addr_t *fp = (addr_t *)uc->uc_mcontext.regs[29];
|
---|
| 714 | int i;
|
---|
| 715 | for (i = 1; i < level; i++)
|
---|
| 716 | fp = (addr_t *)fp[0];
|
---|
| 717 | *paddr = fp[1];
|
---|
| 718 | return 0;
|
---|
| 719 | }
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 | /* ------------------------------------------------------------- */
|
---|
[279] | 723 | #else
|
---|
| 724 |
|
---|
| 725 | #warning add arch specific rt_get_caller_pc()
|
---|
| 726 | static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
|
---|
| 727 | {
|
---|
| 728 | return -1;
|
---|
| 729 | }
|
---|
| 730 |
|
---|
| 731 | #endif /* !__i386__ */
|
---|
| 732 |
|
---|
| 733 | /* ------------------------------------------------------------- */
|
---|
| 734 | #else /* WIN32 */
|
---|
| 735 |
|
---|
| 736 | static long __stdcall cpu_exception_handler(EXCEPTION_POINTERS *ex_info)
|
---|
| 737 | {
|
---|
| 738 | EXCEPTION_RECORD *er = ex_info->ExceptionRecord;
|
---|
| 739 | CONTEXT *uc = ex_info->ContextRecord;
|
---|
| 740 | switch (er->ExceptionCode) {
|
---|
| 741 | case EXCEPTION_ACCESS_VIOLATION:
|
---|
| 742 | if (rt_bound_error_msg && *rt_bound_error_msg)
|
---|
| 743 | rt_error(uc, *rt_bound_error_msg);
|
---|
| 744 | else
|
---|
| 745 | rt_error(uc, "access violation");
|
---|
| 746 | break;
|
---|
| 747 | case EXCEPTION_STACK_OVERFLOW:
|
---|
| 748 | rt_error(uc, "stack overflow");
|
---|
| 749 | break;
|
---|
| 750 | case EXCEPTION_INT_DIVIDE_BY_ZERO:
|
---|
| 751 | rt_error(uc, "division by zero");
|
---|
| 752 | break;
|
---|
| 753 | default:
|
---|
| 754 | rt_error(uc, "exception caught");
|
---|
| 755 | break;
|
---|
| 756 | }
|
---|
| 757 | return EXCEPTION_EXECUTE_HANDLER;
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 | /* Generate a stack backtrace when a CPU exception occurs. */
|
---|
| 761 | static void set_exception_handler(void)
|
---|
| 762 | {
|
---|
| 763 | SetUnhandledExceptionFilter(cpu_exception_handler);
|
---|
| 764 | }
|
---|
| 765 |
|
---|
| 766 | /* return the PC at frame level 'level'. Return non zero if not found */
|
---|
| 767 | static int rt_get_caller_pc(addr_t *paddr, CONTEXT *uc, int level)
|
---|
| 768 | {
|
---|
| 769 | addr_t fp, pc;
|
---|
| 770 | int i;
|
---|
| 771 | #ifdef _WIN64
|
---|
| 772 | pc = uc->Rip;
|
---|
| 773 | fp = uc->Rbp;
|
---|
| 774 | #else
|
---|
| 775 | pc = uc->Eip;
|
---|
| 776 | fp = uc->Ebp;
|
---|
| 777 | #endif
|
---|
| 778 | if (level > 0) {
|
---|
| 779 | for(i=1;i<level;i++) {
|
---|
| 780 | /* XXX: check address validity with program info */
|
---|
| 781 | if (fp <= 0x1000 || fp >= 0xc0000000)
|
---|
| 782 | return -1;
|
---|
| 783 | fp = ((addr_t*)fp)[0];
|
---|
| 784 | }
|
---|
| 785 | pc = ((addr_t*)fp)[1];
|
---|
| 786 | }
|
---|
| 787 | *paddr = pc;
|
---|
| 788 | return 0;
|
---|
| 789 | }
|
---|
| 790 |
|
---|
| 791 | #endif /* _WIN32 */
|
---|
| 792 | #endif /* CONFIG_TCC_BACKTRACE */
|
---|
| 793 | /* ------------------------------------------------------------- */
|
---|
| 794 | #ifdef CONFIG_TCC_STATIC
|
---|
| 795 |
|
---|
| 796 | /* dummy function for profiling */
|
---|
| 797 | ST_FUNC void *dlopen(const char *filename, int flag)
|
---|
| 798 | {
|
---|
| 799 | return NULL;
|
---|
| 800 | }
|
---|
| 801 |
|
---|
| 802 | ST_FUNC void dlclose(void *p)
|
---|
| 803 | {
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 | ST_FUNC const char *dlerror(void)
|
---|
| 807 | {
|
---|
| 808 | return "error";
|
---|
| 809 | }
|
---|
| 810 |
|
---|
| 811 | typedef struct TCCSyms {
|
---|
| 812 | char *str;
|
---|
| 813 | void *ptr;
|
---|
| 814 | } TCCSyms;
|
---|
| 815 |
|
---|
[331] | 816 | #if !defined(CONFIG_TCCBOOT)
|
---|
| 817 | extern int __environ;
|
---|
| 818 | extern int __expand_heap;
|
---|
| 819 | extern int __get_handler_set;
|
---|
| 820 | extern int __get_locale;
|
---|
| 821 | extern int __gmt;
|
---|
| 822 | extern int __h_errno_location;
|
---|
| 823 | extern int __hwcap;
|
---|
| 824 | extern int __init_tls;
|
---|
| 825 | extern int __libc;
|
---|
| 826 | extern int __libc_sigaction;
|
---|
| 827 | extern int __libc_start_main;
|
---|
| 828 | extern int __malloc0;
|
---|
| 829 | extern int __ofl_lock;
|
---|
| 830 | extern int __ofl_unlock;
|
---|
| 831 | extern int __progname;
|
---|
| 832 | extern int __progname_full;
|
---|
| 833 | extern int __secs_to_zone;
|
---|
| 834 | extern int __sigaction;
|
---|
| 835 | extern int __sysinfo;
|
---|
| 836 | extern int __tm_to_tzname;
|
---|
| 837 | //extern int atexit;
|
---|
| 838 | //extern int environ;
|
---|
| 839 | //extern int free;
|
---|
| 840 | extern int gethostbyname2;
|
---|
| 841 | //extern int getopt;
|
---|
| 842 | extern int getpwnam;
|
---|
| 843 | //extern int gmtime;
|
---|
| 844 | //extern int localtime;
|
---|
| 845 | //extern int malloc;
|
---|
| 846 | extern int mbrtowc;
|
---|
| 847 | //extern int optarg;
|
---|
| 848 | extern int optind;
|
---|
| 849 | //extern int rand;
|
---|
| 850 | //extern int realloc;
|
---|
| 851 | //extern int setenv;
|
---|
| 852 | extern int setlocale;
|
---|
| 853 | //extern int sigaction;
|
---|
| 854 | //extern int srand;
|
---|
| 855 | //extern int stderr;
|
---|
| 856 | //extern int stdin;
|
---|
| 857 | //extern int stdout;
|
---|
| 858 | //extern int strtok;
|
---|
| 859 | extern int syslog;
|
---|
| 860 | extern int vsyslog;
|
---|
| 861 | #endif
|
---|
[279] | 862 |
|
---|
| 863 | /* add the symbol you want here if no dynamic linking is done */
|
---|
| 864 | static TCCSyms tcc_syms[] = {
|
---|
| 865 | #if !defined(CONFIG_TCCBOOT)
|
---|
| 866 | #define TCCSYM(a) { #a, &a, },
|
---|
[331] | 867 | TCCSYM(__environ)
|
---|
| 868 | TCCSYM(__expand_heap)
|
---|
| 869 | TCCSYM(__get_handler_set)
|
---|
| 870 | TCCSYM(__get_locale)
|
---|
| 871 | TCCSYM(__gmt)
|
---|
| 872 | TCCSYM(__h_errno_location)
|
---|
| 873 | TCCSYM(__hwcap)
|
---|
| 874 | TCCSYM(__init_tls)
|
---|
| 875 | TCCSYM(__libc)
|
---|
| 876 | TCCSYM(__libc_sigaction)
|
---|
| 877 | TCCSYM(__libc_start_main)
|
---|
| 878 | TCCSYM(__malloc0)
|
---|
| 879 | TCCSYM(__ofl_lock)
|
---|
| 880 | TCCSYM(__ofl_unlock)
|
---|
| 881 | TCCSYM(__progname)
|
---|
| 882 | TCCSYM(__progname_full)
|
---|
| 883 | TCCSYM(__secs_to_zone)
|
---|
| 884 | TCCSYM(__sigaction)
|
---|
| 885 | TCCSYM(__sysinfo)
|
---|
| 886 | TCCSYM(__tm_to_tzname)
|
---|
| 887 | TCCSYM(atexit)
|
---|
| 888 | TCCSYM(environ)
|
---|
| 889 | TCCSYM(free)
|
---|
| 890 | TCCSYM(gethostbyname2)
|
---|
| 891 | TCCSYM(getopt)
|
---|
| 892 | TCCSYM(getpwnam)
|
---|
| 893 | TCCSYM(gmtime)
|
---|
| 894 | TCCSYM(localtime)
|
---|
| 895 | TCCSYM(malloc)
|
---|
| 896 | TCCSYM(mbrtowc)
|
---|
| 897 | TCCSYM(optarg)
|
---|
| 898 | TCCSYM(optind)
|
---|
| 899 | TCCSYM(rand)
|
---|
| 900 | TCCSYM(realloc)
|
---|
| 901 | TCCSYM(setenv)
|
---|
| 902 | TCCSYM(setlocale)
|
---|
| 903 | TCCSYM(sigaction)
|
---|
| 904 | TCCSYM(srand)
|
---|
| 905 | TCCSYM(stderr)
|
---|
| 906 | TCCSYM(stdin)
|
---|
| 907 | TCCSYM(stdout)
|
---|
| 908 | TCCSYM(strtok)
|
---|
| 909 | TCCSYM(syslog)
|
---|
| 910 | TCCSYM(vsyslog)
|
---|
[279] | 911 | #undef TCCSYM
|
---|
| 912 | #endif
|
---|
| 913 | { NULL, NULL },
|
---|
| 914 | };
|
---|
| 915 |
|
---|
[331] | 916 | ST_FUNC void *dlsym(void *handle, const char *symbol)
|
---|
[279] | 917 | {
|
---|
| 918 | TCCSyms *p;
|
---|
| 919 | p = tcc_syms;
|
---|
| 920 | while (p->str != NULL) {
|
---|
| 921 | if (!strcmp(p->str, symbol))
|
---|
| 922 | return p->ptr;
|
---|
| 923 | p++;
|
---|
| 924 | }
|
---|
| 925 | return NULL;
|
---|
| 926 | }
|
---|
| 927 |
|
---|
| 928 | #endif /* CONFIG_TCC_STATIC */
|
---|
| 929 | #endif /* TCC_IS_NATIVE */
|
---|
| 930 | /* ------------------------------------------------------------- */
|
---|