mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2024-12-27 16:18:52 +00:00
133 lines
4.1 KiB
Diff
133 lines
4.1 KiB
Diff
As-applied. From:
|
|
|
|
https://gcc.gnu.org/ml/gcc-patches/2014-09/msg02625.html
|
|
|
|
Linked from bug62231 comment 4 there
|
|
|
|
---
|
|
gcc/defaults.h | 5 +++
|
|
gcc/dwarf2cfi.c | 76 +++++++++++++++++++++++++++++++++++-----------------
|
|
libgcc/unwind-dw2.c | 4 --
|
|
3 files changed, 57 insertions(+), 28 deletions(-)
|
|
|
|
--- a/gcc/defaults.h
|
|
+++ b/gcc/defaults.h
|
|
@@ -438,6 +438,11 @@
|
|
#define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
|
|
#endif
|
|
|
|
+/* The mapping from dwarf CFA reg number to internal dwarf reg numbers. */
|
|
+#ifndef DWARF_REG_TO_UNWIND_COLUMN
|
|
+#define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
|
|
+#endif
|
|
+
|
|
/* Map register numbers held in the call frame info that gcc has
|
|
collected using DWARF_FRAME_REGNUM to those that should be output in
|
|
.debug_frame and .eh_frame. */
|
|
--- a/gcc/dwarf2cfi.c
|
|
+++ b/gcc/dwarf2cfi.c
|
|
@@ -252,7 +252,44 @@
|
|
gen_int_mode (size, mode));
|
|
}
|
|
|
|
-/* Generate code to initialize the register size table. */
|
|
+/* Helper for expand_builtin_init_dwarf_reg_sizes. Generate code to
|
|
+ initialize the dwarf register size table entry corresponding to register
|
|
+ REGNO in REGMODE. TABLE is the table base address, SLOTMODE is the mode
|
|
+ to use for the size entry to initialize, and WROTE_RETURN_COLUMN needs to
|
|
+ be set to true if the dwarf register number for REGNO is the dwarf return
|
|
+ column number. */
|
|
+
|
|
+static
|
|
+void init_one_dwarf_reg_size (int regno, enum machine_mode regmode,
|
|
+ rtx table, enum machine_mode slotmode,
|
|
+ bool *wrote_return_column)
|
|
+{
|
|
+ const unsigned int dnum = DWARF_FRAME_REGNUM (regno);
|
|
+ const unsigned int rnum = DWARF2_FRAME_REG_OUT (dnum, 1);
|
|
+ const unsigned int dcol = DWARF_REG_TO_UNWIND_COLUMN (rnum);
|
|
+
|
|
+ const HOST_WIDE_INT slotoffset = dcol * GET_MODE_SIZE (slotmode);
|
|
+ const HOST_WIDE_INT regsize = GET_MODE_SIZE (regmode);
|
|
+
|
|
+ if (rnum >= DWARF_FRAME_REGISTERS)
|
|
+ return;
|
|
+
|
|
+ if (dnum == DWARF_FRAME_RETURN_COLUMN)
|
|
+ {
|
|
+ if (regmode == VOIDmode)
|
|
+ return;
|
|
+ *wrote_return_column = true;
|
|
+ }
|
|
+
|
|
+ if (slotoffset < 0)
|
|
+ return;
|
|
+
|
|
+ emit_move_insn (adjust_address (table, slotmode, slotoffset),
|
|
+ gen_int_mode (regsize, slotmode));
|
|
+}
|
|
+
|
|
+/* Generate code to initialize the dwarf register size table located
|
|
+ at the provided ADDRESS. */
|
|
|
|
void
|
|
expand_builtin_init_dwarf_reg_sizes (tree address)
|
|
@@ -265,30 +302,21 @@
|
|
|
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
|
{
|
|
- unsigned int dnum = DWARF_FRAME_REGNUM (i);
|
|
- unsigned int rnum = DWARF2_FRAME_REG_OUT (dnum, 1);
|
|
+ enum machine_mode save_mode = reg_raw_mode[i];
|
|
+ rtx span;
|
|
|
|
- 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;
|
|
-
|
|
- 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)
|
|
- continue;
|
|
- wrote_return_column = true;
|
|
- }
|
|
- size = GET_MODE_SIZE (save_mode);
|
|
- if (offset < 0)
|
|
- continue;
|
|
-
|
|
- emit_move_insn (adjust_address (mem, mode, offset),
|
|
- gen_int_mode (size, mode));
|
|
- }
|
|
+ span = targetm.dwarf_register_span (gen_rtx_REG (save_mode, i));
|
|
+ if (!span)
|
|
+ init_one_dwarf_reg_size (i, save_mode, mem, mode, &wrote_return_column);
|
|
+ else
|
|
+ {
|
|
+ for (int si = 0; si < XVECLEN (span, 0); si++)
|
|
+ {
|
|
+ rtx reg = XVECEXP (span, 0, si);
|
|
+ init_one_dwarf_reg_size
|
|
+ (REGNO (reg), GET_MODE (reg), mem, mode, &wrote_return_column);
|
|
+ }
|
|
+ }
|
|
}
|
|
|
|
if (!wrote_return_column)
|
|
--- a/libgcc/unwind-dw2.c
|
|
+++ b/libgcc/unwind-dw2.c
|
|
@@ -55,10 +55,6 @@
|
|
#define PRE_GCC3_DWARF_FRAME_REGISTERS DWARF_FRAME_REGISTERS
|
|
#endif
|
|
|
|
-#ifndef DWARF_REG_TO_UNWIND_COLUMN
|
|
-#define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
|
|
-#endif
|
|
-
|
|
/* ??? For the public function interfaces, we tend to gcc_assert that the
|
|
column numbers are in range. For the dwarf2 unwind info this does happen,
|
|
although so far in a case that doesn't actually matter.
|