OpenE2K
/
binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add support for DWARF-4 line number tables. 

Reads the maximum_operations_per_instruction field, added in DWARF-4 to the
line number program header.

gold/
	* PR gold/22776
	* dwarf_reader.cc (Sized_dwarf_line_info::read_header_prolog): Add
	support for DWARF-4 line number tables.
	* dwarf_reader.h (Sized_dwarf_line_info::max_ops_per_insn): New field.
This commit is contained in:
Cary Coutant 2018-02-02 17:44:27 -08:00
parent d73daf84d6
commit c833445823
3 changed files with 20 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gold/ChangeLog
View File

@ -1,3 +1,10 @@
2018-02-02 Cary Coutant <ccoutant@gmail.com>
* PR gold/22776
* dwarf_reader.cc (Sized_dwarf_line_info::read_header_prolog): Add
support for DWARF-4 line number tables.
* dwarf_reader.h (Sized_dwarf_line_info::max_ops_per_insn): New field.
2018-01-18 Alan Modra <amodra@gmail.com>
* powerpc.cc (param_plt_align): New function supplying default

11
gold/dwarf_reader.cc
View File

@ -1667,6 +1667,17 @@ Sized_dwarf_line_info<size, big_endian>::read_header_prolog(
header_.min_insn_length = *lineptr;
lineptr += 1;
if (header_.version < 4)
header_.max_ops_per_insn = 1;
else
{
// DWARF 4 added the maximum_operations_per_instruction field.
header_.max_ops_per_insn = *lineptr;
lineptr += 1;
// TODO: Add support for values other than 1.
gold_assert(header_.max_ops_per_insn == 1);
}
header_.default_is_stmt = *lineptr;
lineptr += 1;

3
gold/dwarf_reader.h
View File

@ -1070,7 +1070,8 @@ class Sized_dwarf_line_info : public Dwarf_line_info
off_t total_length;
int version;
off_t prologue_length;
int min_insn_length; // insn stands for instructin
int min_insn_length; // insn stands for instruction
int max_ops_per_insn; // Added in DWARF-4.
bool default_is_stmt; // stmt stands for statement
signed char line_base;
int line_range;