diff options
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-4.9/0052-Add-target-hook-to-override-DWARF2-frame-register-si.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-4.9/0052-Add-target-hook-to-override-DWARF2-frame-register-si.patch | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0052-Add-target-hook-to-override-DWARF2-frame-register-si.patch b/meta/recipes-devtools/gcc/gcc-4.9/0052-Add-target-hook-to-override-DWARF2-frame-register-si.patch new file mode 100644 index 0000000000..f6958b32c9 --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-4.9/0052-Add-target-hook-to-override-DWARF2-frame-register-si.patch @@ -0,0 +1,138 @@ +From d626297e87e19251a284ea1e9360e831b48999ca Mon Sep 17 00:00:00 2001 +From: mpf <mpf@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Thu, 4 Sep 2014 08:32:05 +0000 +Subject: [PATCH] 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. + + + +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@214898 138bc75d-0d04-0410-961f-82ee72b054a4 + +Signed-off-by: Khem Raj <raj.khem@gmail.com> +Upstream-Status: Backport [gcc 5.0] + +--- + gcc/ChangeLog | 10 ++++++++++ + gcc/doc/tm.texi | 7 +++++++ + gcc/doc/tm.texi.in | 2 ++ + gcc/dwarf2cfi.c | 4 +--- + gcc/target.def | 11 +++++++++++ + gcc/targhooks.c | 13 +++++++++++++ + gcc/targhooks.h | 1 + + 7 files changed, 45 insertions(+), 3 deletions(-) + +Index: gcc-4.9.2/gcc/doc/tm.texi +=================================================================== +--- gcc-4.9.2.orig/gcc/doc/tm.texi ++++ gcc-4.9.2/gcc/doc/tm.texi +@@ -9017,6 +9017,13 @@ register in Dwarf. Otherwise, this hook + 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 +Index: gcc-4.9.2/gcc/doc/tm.texi.in +=================================================================== +--- gcc-4.9.2.orig/gcc/doc/tm.texi.in ++++ gcc-4.9.2/gcc/doc/tm.texi.in +@@ -6745,6 +6745,8 @@ the target supports DWARF 2 frame unwind + + @hook TARGET_DWARF_REGISTER_SPAN + ++@hook TARGET_DWARF_FRAME_REG_MODE ++ + @hook TARGET_INIT_DWARF_REG_SIZES_EXTRA + + @hook TARGET_ASM_TTYPE +Index: gcc-4.9.2/gcc/dwarf2cfi.c +=================================================================== +--- gcc-4.9.2.orig/gcc/dwarf2cfi.c ++++ gcc-4.9.2/gcc/dwarf2cfi.c +@@ -271,11 +271,9 @@ expand_builtin_init_dwarf_reg_sizes (tre + if (rnum < DWARF_FRAME_REGISTERS) + { + HOST_WIDE_INT offset = rnum * GET_MODE_SIZE (mode); +- enum machine_mode save_mode = reg_raw_mode[i]; + HOST_WIDE_INT size; ++ enum machine_mode save_mode = targetm.dwarf_frame_reg_mode (i); + +- if (HARD_REGNO_CALL_PART_CLOBBERED (i, save_mode)) +- save_mode = choose_hard_reg_mode (i, 1, true); + if (dnum == DWARF_FRAME_RETURN_COLUMN) + { + if (save_mode == VOIDmode) +Index: gcc-4.9.2/gcc/target.def +=================================================================== +--- gcc-4.9.2.orig/gcc/target.def ++++ gcc-4.9.2/gcc/target.def +@@ -3218,6 +3218,17 @@ If not defined, the default is to return + rtx, (rtx reg), + hook_rtx_rtx_null) + ++/* Given a register return the mode of the corresponding DWARF frame ++ register. */ ++DEFHOOK ++(dwarf_frame_reg_mode, ++ "Given a register, this hook should return the mode which the\n\ ++corresponding Dwarf frame register should have. This is normally\n\ ++used to return a smaller mode than the raw mode to prevent call\n\ ++clobbered parts of a register altering the frame register size", ++ enum machine_mode, (int regno), ++ default_dwarf_frame_reg_mode) ++ + /* If expand_builtin_init_dwarf_reg_sizes needs to fill in table + entries not corresponding directly to registers below + FIRST_PSEUDO_REGISTER, this hook should generate the necessary +Index: gcc-4.9.2/gcc/targhooks.c +=================================================================== +--- gcc-4.9.2.orig/gcc/targhooks.c ++++ gcc-4.9.2/gcc/targhooks.c +@@ -1438,6 +1438,19 @@ default_debug_unwind_info (void) + return UI_NONE; + } + ++/* Determine the correct mode for a Dwarf frame register that represents ++ register REGNO. */ ++ ++enum machine_mode ++default_dwarf_frame_reg_mode (int regno) ++{ ++ enum machine_mode save_mode = reg_raw_mode[regno]; ++ ++ if (HARD_REGNO_CALL_PART_CLOBBERED (regno, save_mode)) ++ save_mode = choose_hard_reg_mode (regno, 1, true); ++ return save_mode; ++} ++ + /* To be used by targets where reg_raw_mode doesn't return the right + mode for registers used in apply_builtin_return and apply_builtin_arg. */ + +Index: gcc-4.9.2/gcc/targhooks.h +=================================================================== +--- gcc-4.9.2.orig/gcc/targhooks.h ++++ gcc-4.9.2/gcc/targhooks.h +@@ -194,6 +194,7 @@ extern int default_label_align_max_skip + extern int default_jump_align_max_skip (rtx); + extern section * default_function_section(tree decl, enum node_frequency freq, + bool startup, bool exit); ++extern enum machine_mode default_dwarf_frame_reg_mode (int); + extern enum machine_mode default_get_reg_raw_mode (int); + + extern void *default_get_pch_validity (size_t *); |