diff options
Diffstat (limited to 'backends/tilegx_retval.c')
| -rw-r--r-- | backends/tilegx_retval.c | 63 |
1 files changed, 26 insertions, 37 deletions
diff --git a/backends/tilegx_retval.c b/backends/tilegx_retval.c index e14cc512..db81a20b 100644 --- a/backends/tilegx_retval.c +++ b/backends/tilegx_retval.c @@ -1,5 +1,6 @@ /* Function return value location for Linux/TILE-Gx ABI. Copyright (C) 2012 Tilera Corporation + Copyright (C) 2014 Red Hat, Inc. This file is part of elfutils. This file is free software; you can redistribute it and/or modify @@ -59,27 +60,10 @@ tilegx_return_value_location (Dwarf_Die *functypedie, const Dwarf_Op **locp) { /* Start with the function's type, and get the DW_AT_type attribute, which is the type of the return value. */ - - Dwarf_Attribute attr_mem; - Dwarf_Attribute *attr = dwarf_attr_integrate (functypedie, DW_AT_type, - &attr_mem); - if (attr == NULL) - /* The function has no return value, like a `void' function in C. */ - return 0; - - Dwarf_Die die_mem; - Dwarf_Die *typedie = dwarf_formref_die (attr, &die_mem); - int tag = DWARF_TAG_OR_RETURN (typedie); - - /* Follow typedefs and qualifiers to get to the actual type. */ - while (tag == DW_TAG_typedef - || tag == DW_TAG_const_type || tag == DW_TAG_volatile_type - || tag == DW_TAG_restrict_type || tag == DW_TAG_mutable_type) - { - attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem); - typedie = dwarf_formref_die (attr, &die_mem); - tag = DWARF_TAG_OR_RETURN (typedie); - } + Dwarf_Die die_mem, *typedie = &die_mem; + int tag = dwarf_peeled_die_type (functypedie, typedie); + if (tag <= 0) + return tag; Dwarf_Word size; switch (tag) @@ -90,6 +74,7 @@ tilegx_return_value_location (Dwarf_Die *functypedie, const Dwarf_Op **locp) case DW_TAG_subrange_type: if (! dwarf_hasattr_integrate (typedie, DW_AT_byte_size)) { + Dwarf_Attribute attr_mem, *attr; attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem); typedie = dwarf_formref_die (attr, &die_mem); tag = DWARF_TAG_OR_RETURN (typedie); @@ -100,22 +85,25 @@ tilegx_return_value_location (Dwarf_Die *functypedie, const Dwarf_Op **locp) case DW_TAG_enumeration_type: case DW_TAG_pointer_type: case DW_TAG_ptr_to_member_type: - if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_byte_size, - &attr_mem), &size) != 0) - { - if (tag == DW_TAG_pointer_type || tag == DW_TAG_ptr_to_member_type) - size = 8; - else - return -1; - } - if (tag == DW_TAG_base_type) - { - Dwarf_Word encoding; - if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_encoding, - &attr_mem), - &encoding) != 0) - return -1; - } + { + Dwarf_Attribute attr_mem; + if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_byte_size, + &attr_mem), &size) != 0) + { + if (tag == DW_TAG_pointer_type || tag == DW_TAG_ptr_to_member_type) + size = 8; + else + return -1; + } + if (tag == DW_TAG_base_type) + { + Dwarf_Word encoding; + if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_encoding, + &attr_mem), + &encoding) != 0) + return -1; + } + } /* Small enough structs are passed directly in registers R0 ... R7. */ if (size <= 8) @@ -139,6 +127,7 @@ tilegx_return_value_location (Dwarf_Die *functypedie, const Dwarf_Op **locp) { if (tag == DW_TAG_array_type) { + Dwarf_Attribute attr_mem, *attr; /* Check if it's a character array. */ attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem); typedie = dwarf_formref_die (attr, &die_mem); |