Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 1 | /* Get CFA expression for frame. |
| 2 | Copyright (C) 2009 Red Hat, Inc. |
| 3 | This file is part of Red Hat elfutils. |
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| 49 | |
| 50 | #ifdef HAVE_CONFIG_H |
| 51 | # include <config.h> |
| 52 | #endif |
| 53 | |
| 54 | #include "cfi.h" |
| 55 | #include <dwarf.h> |
| 56 | #include <stdlib.h> |
| 57 | |
| 58 | int |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 59 | dwarf_frame_cfa (fs, ops, nops) |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 60 | Dwarf_Frame *fs; |
| 61 | Dwarf_Op **ops; |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 62 | size_t *nops; |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 63 | { |
| 64 | /* Maybe there was a previous error. */ |
| 65 | if (fs == NULL) |
| 66 | return -1; |
| 67 | |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 68 | int result = 0; |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 69 | switch (fs->cfa_rule) |
| 70 | { |
| 71 | case cfa_undefined: |
| 72 | *ops = NULL; |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 73 | *nops = 0; |
| 74 | break; |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 75 | |
| 76 | case cfa_offset: |
| 77 | /* The Dwarf_Op was already fully initialized by execute_cfi. */ |
| 78 | *ops = &fs->cfa_data.offset; |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 79 | *nops = 1; |
| 80 | break; |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 81 | |
| 82 | case cfa_expr: |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 83 | /* Parse the expression into internal form. */ |
| 84 | result = __libdw_intern_expression |
| 85 | (NULL, fs->cache->other_byte_order, |
| 86 | fs->cache->e_ident[EI_CLASS] == ELFCLASS32 ? 4 : 8, |
Roland McGrath | 0ab9783 | 2010-04-26 11:50:27 -0700 | [diff] [blame] | 87 | &fs->cache->expr_tree, &fs->cfa_data.expr, false, false, |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 88 | ops, nops, IDX_debug_frame); |
| 89 | break; |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 90 | |
| 91 | default: |
| 92 | abort (); |
| 93 | } |
| 94 | |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 95 | return result; |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 96 | } |