1 | /* |
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2 | * COPYRIGHT (c) 2012-2016 Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.org/license/LICENSE. |
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7 | */ |
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8 | /** |
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9 | * @file |
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10 | * |
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11 | * @ingroup rtems_rtld |
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12 | * |
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13 | * @brief RTEMS Run-Time Link Editor |
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14 | * |
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15 | * This is the RTL implementation. |
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16 | */ |
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17 | |
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18 | #if HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #include <string.h> |
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23 | #include <stdio.h> |
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24 | |
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25 | #include <rtems/rtl/rtl.h> |
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26 | #include "rtl-elf.h" |
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27 | #include "rtl-error.h" |
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28 | #include "rtl-unwind.h" |
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29 | #include "rtl-unwind-dw2.h" |
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30 | |
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31 | /* |
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32 | * These interfaces are not exported outside the GCC source. |
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33 | */ |
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34 | void __register_frame (void *begin); |
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35 | void __deregister_frame (void *begin); |
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36 | |
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37 | bool |
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38 | rtems_rtl_elf_unwind_dw2_parse (const rtems_rtl_obj_t* obj, |
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39 | const char* name, |
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40 | uint32_t flags) |
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41 | { |
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42 | return |
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43 | ((flags & RTEMS_RTL_OBJ_SECT_CONST) != 0) && |
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44 | ((strcmp(name, ".eh_frame") == 0) || |
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45 | (strncmp(name, ".gcc_except_table.", sizeof (".gcc_except_table.") - 1) == 0)); |
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46 | } |
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47 | |
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48 | bool |
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49 | rtems_rtl_elf_unwind_dw2_register (const rtems_rtl_obj_t* obj) |
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50 | { |
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51 | rtems_rtl_obj_sect_t* sect = rtems_rtl_obj_find_section (obj, ".eh_frame"); |
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52 | |
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53 | if (sect != NULL && sect->size > 0 && sect->base != NULL) |
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54 | { |
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55 | __register_frame (sect->base); |
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56 | } |
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57 | |
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58 | return true; |
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59 | } |
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60 | |
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61 | bool rtems_rtl_elf_unwind_dw2_deregister (const rtems_rtl_obj_t* obj) |
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62 | { |
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63 | rtems_rtl_obj_sect_t* sect = rtems_rtl_obj_find_section (obj, ".eh_frame"); |
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64 | |
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65 | if (sect != NULL && sect->size > 0 && sect->base != NULL) |
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66 | { |
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67 | __deregister_frame (sect->base); |
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68 | } |
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69 | |
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70 | return true; |
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71 | } |
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