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| author | Matthew Fortune <matthew.fortune@imgtec.com> | 2014-09-04 08:32:05 +0000 |
|---|---|---|
| committer | Matthew Fortune <mpf@gcc.gnu.org> | 2014-09-04 08:32:05 +0000 |
| commit | ff050c66b18d8768b57b0c99f824e9b82e569ccb (patch) | |
| tree | 36a08d3b50e1618d7539692d59cc1543305d5d9a /gcc/doc | |
| parent | a0f75fa8c317ced0fb3d916d3b7f52c88eb4a8ea (diff) | |
| download | gcc-ff050c66b18d8768b57b0c99f824e9b82e569ccb.zip gcc-ff050c66b18d8768b57b0c99f824e9b82e569ccb.tar.gz gcc-ff050c66b18d8768b57b0c99f824e9b82e569ccb.tar.bz2 | |
Add target hook to override DWARF2 frame register size
gcc/
* target.def (TARGET_DWARF_FRAME_REG_MODE): New target hook.
* targhooks.c (default_dwarf_frame_reg_mode): New function.
* targhooks.h (default_dwarf_frame_reg_mode): New prototype.
* doc/tm.texi.in (TARGET_DWARF_FRAME_REG_MODE): Document.
* doc/tm.texi: Regenerate.
* dwarf2cfi.c (expand_builtin_init_dwarf_reg_sizes): Abstract mode
selection logic to default_dwarf_frame_reg_mode.
From-SVN: r214898
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/tm.texi | 7 | ||||
| -rw-r--r-- | gcc/doc/tm.texi.in | 2 |
2 files changed, 9 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 0c44d51..9496477 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -8871,6 +8871,13 @@ register in Dwarf. Otherwise, this hook should return @code{NULL_RTX}. If not defined, the default is to return @code{NULL_RTX}. @end deftypefn +@deftypefn {Target Hook} {enum machine_mode} TARGET_DWARF_FRAME_REG_MODE (int @var{regno}) +Given a register, this hook should return the mode which the +corresponding Dwarf frame register should have. This is normally +used to return a smaller mode than the raw mode to prevent call +clobbered parts of a register altering the frame register size +@end deftypefn + @deftypefn {Target Hook} void TARGET_INIT_DWARF_REG_SIZES_EXTRA (tree @var{address}) If some registers are represented in Dwarf-2 unwind information in multiple pieces, define this hook to fill in information about the diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in index 7a63353..152d37d 100644 --- a/gcc/doc/tm.texi.in +++ b/gcc/doc/tm.texi.in @@ -6594,6 +6594,8 @@ the target supports DWARF 2 frame unwind information. @hook TARGET_DWARF_REGISTER_SPAN +@hook TARGET_DWARF_FRAME_REG_MODE + @hook TARGET_INIT_DWARF_REG_SIZES_EXTRA @hook TARGET_ASM_TTYPE |