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157 lines
5.3 KiB
Diff
157 lines
5.3 KiB
Diff
Fetched from Xilinx gcc git at https://github.com/Xilinx/gcc
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From 23c35173490ac2d6348a668dfc9c1a6eb62171f2 Mon Sep 17 00:00:00 2001
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From: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
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Date: Mon, 18 Jun 2012 20:18:13 +0200
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Subject: [PATCH] [Patch, microblaze]: Enable DWARF exception handling support.
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Changelog
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2013-03-18 Edgar E. Iglesias <edgar.iglesias@xilinx.com>
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David Holsgrove <david.holsgrove@xilinx.com>
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* common/config/microblaze/microblaze-common.c: Remove
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TARGET_EXCEPT_UNWIND_INFO definition.
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* config/microblaze/microblaze-protos.h: Add
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microblaze_eh_return prototype.
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* gcc/config/microblaze/microblaze.c: (microblaze_must_save_register,
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microblaze_expand_epilogue, microblaze_return_addr): Handle
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calls_eh_return
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(microblaze_eh_return): New function.
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* gcc/config/microblaze/microblaze.h: Define RETURN_ADDR_OFFSET,
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EH_RETURN_DATA_REGNO, MB_EH_STACKADJ_REGNUM, EH_RETURN_STACKADJ_RTX,
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ASM_PREFERRED_EH_DATA_FORMAT
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* gcc/config/microblaze/microblaze.md: Define eh_return pattern.
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Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
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---
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gcc/common/config/microblaze/microblaze-common.c | 3 --
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gcc/config/microblaze/microblaze-protos.h | 1
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gcc/config/microblaze/microblaze.c | 29 +++++++++++++++++++----
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gcc/config/microblaze/microblaze.h | 15 +++++++++++
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gcc/config/microblaze/microblaze.md | 11 ++++++++
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5 files changed, 52 insertions(+), 7 deletions(-)
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--- a/gcc/common/config/microblaze/microblaze-common.c
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+++ b/gcc/common/config/microblaze/microblaze-common.c
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@@ -37,7 +37,4 @@
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#undef TARGET_OPTION_OPTIMIZATION_TABLE
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#define TARGET_OPTION_OPTIMIZATION_TABLE microblaze_option_optimization_table
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-#undef TARGET_EXCEPT_UNWIND_INFO
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-#define TARGET_EXCEPT_UNWIND_INFO sjlj_except_unwind_info
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-
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struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
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--- a/gcc/config/microblaze/microblaze-protos.h
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+++ b/gcc/config/microblaze/microblaze-protos.h
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@@ -56,6 +56,7 @@
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extern int symbol_mentioned_p (rtx);
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extern int label_mentioned_p (rtx);
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extern bool microblaze_cannot_force_const_mem (machine_mode, rtx);
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+extern void microblaze_eh_return (rtx op0);
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#endif /* RTX_CODE */
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/* Declare functions in microblaze-c.c. */
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--- a/gcc/config/microblaze/microblaze.c
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+++ b/gcc/config/microblaze/microblaze.c
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@@ -1959,6 +1959,11 @@
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if (frame_pointer_needed && (regno == HARD_FRAME_POINTER_REGNUM))
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return 1;
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+ if (crtl->calls_eh_return
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+ && regno == MB_ABI_SUB_RETURN_ADDR_REGNUM) {
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+ return 1;
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+ }
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+
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if (!crtl->is_leaf)
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{
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if (regno == MB_ABI_SUB_RETURN_ADDR_REGNUM)
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@@ -1986,6 +1991,13 @@
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return 1;
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}
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+ if (crtl->calls_eh_return
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+ && (regno == EH_RETURN_DATA_REGNO (0)
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+ || regno == EH_RETURN_DATA_REGNO (1)))
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+ {
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+ return 1;
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+ }
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+
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return 0;
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}
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@@ -3067,6 +3079,12 @@
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emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, fsiz_rtx));
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}
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+ if (crtl->calls_eh_return)
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+ emit_insn (gen_addsi3 (stack_pointer_rtx,
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+ stack_pointer_rtx,
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+ gen_rtx_raw_REG (SImode,
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+ MB_EH_STACKADJ_REGNUM)));
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+
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emit_jump_insn (gen_return_internal (gen_rtx_REG (Pmode, GP_REG_FIRST +
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MB_ABI_SUB_RETURN_ADDR_REGNUM)));
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}
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@@ -3364,10 +3382,13 @@
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if (count != 0)
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return NULL_RTX;
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- return gen_rtx_PLUS (Pmode,
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- get_hard_reg_initial_val (Pmode,
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- MB_ABI_SUB_RETURN_ADDR_REGNUM),
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- GEN_INT (8));
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+ return get_hard_reg_initial_val (Pmode,
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+ MB_ABI_SUB_RETURN_ADDR_REGNUM);
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+}
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+
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+void microblaze_eh_return (rtx op0)
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+{
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+ emit_insn (gen_movsi(gen_rtx_MEM(Pmode, stack_pointer_rtx), op0));
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}
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/* Queue an .ident string in the queue of top-level asm statements.
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--- a/gcc/config/microblaze/microblaze.h
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+++ b/gcc/config/microblaze/microblaze.h
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@@ -184,6 +184,21 @@
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#define INCOMING_RETURN_ADDR_RTX \
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gen_rtx_REG (VOIDmode, GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM)
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+/* Specifies the offset from INCOMING_RETURN_ADDR_RTX and the actual return PC. */
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+#define RETURN_ADDR_OFFSET (8)
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+
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+/* Describe how we implement __builtin_eh_return. */
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+#define EH_RETURN_DATA_REGNO(N) (((N) < 2) ? MB_ABI_FIRST_ARG_REGNUM + (N) : INVALID_REGNUM)
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+
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+#define MB_EH_STACKADJ_REGNUM MB_ABI_INT_RETURN_VAL2_REGNUM
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+#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, MB_EH_STACKADJ_REGNUM)
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+
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+/* Select a format to encode pointers in exception handling data. CODE
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+ is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
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+ true if the symbol may be affected by dynamic relocations. */
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+#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
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+ ((flag_pic || GLOBAL) ? DW_EH_PE_aligned : DW_EH_PE_absptr)
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+
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/* Use DWARF 2 debugging information by default. */
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#define DWARF2_DEBUGGING_INFO
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#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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--- a/gcc/config/microblaze/microblaze.md
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+++ b/gcc/config/microblaze/microblaze.md
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@@ -2272,4 +2272,15 @@
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(set_attr "mode" "SI")
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(set_attr "length" "4")])
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+; This is used in compiling the unwind routines.
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+(define_expand "eh_return"
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+ [(use (match_operand 0 "general_operand" ""))]
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+ ""
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+ "
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+{
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+ microblaze_eh_return(operands[0]);
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+ DONE;
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+}")
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+
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(include "sync.md")
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+
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