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-rw-r--r--recipes-microblaze/gcc/files/0001-Patch-microblaze-Enable-DWARF-exception-handling-sup.patch158
1 files changed, 158 insertions, 0 deletions
diff --git a/recipes-microblaze/gcc/files/0001-Patch-microblaze-Enable-DWARF-exception-handling-sup.patch b/recipes-microblaze/gcc/files/0001-Patch-microblaze-Enable-DWARF-exception-handling-sup.patch
new file mode 100644
index 00000000..d6549cad
--- /dev/null
+++ b/recipes-microblaze/gcc/files/0001-Patch-microblaze-Enable-DWARF-exception-handling-sup.patch
@@ -0,0 +1,158 @@
+From: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
+Subject: [PATCH 1/8] [Patch, microblaze]: Enable DWARF exception handling
+ support.
+
+Changelog
+
+2013-03-18 Edgar E. Iglesias <edgar.iglesias@xilinx.com>
+ David Holsgrove <david.holsgrove@xilinx.com>
+
+ * common/config/microblaze/microblaze-common.c: Remove
+ TARGET_EXCEPT_UNWIND_INFO definition.
+ * config/microblaze/microblaze-protos.h: Add
+ microblaze_eh_return prototype.
+ * gcc/config/microblaze/microblaze.c: (microblaze_must_save_register,
+ microblaze_expand_epilogue, microblaze_return_addr): Handle
+ calls_eh_return
+ (microblaze_eh_return): New function.
+ * gcc/config/microblaze/microblaze.h: Define RETURN_ADDR_OFFSET,
+ EH_RETURN_DATA_REGNO, MB_EH_STACKADJ_REGNUM, EH_RETURN_STACKADJ_RTX,
+ ASM_PREFERRED_EH_DATA_FORMAT
+ * gcc/config/microblaze/microblaze.md: Define eh_return pattern.
+
+Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
+Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
+Upstream-Status: Pending
+
+diff --git a/gcc/common/config/microblaze/microblaze-common.c b/gcc/common/config/microblaze/microblaze-common.c
+index 07a71fb..6c25a76 100644
+--- a/gcc/common/config/microblaze/microblaze-common.c
++++ b/gcc/common/config/microblaze/microblaze-common.c
+@@ -37,7 +37,4 @@ static const struct default_options microblaze_option_optimization_table[] =
+ #undef TARGET_OPTION_OPTIMIZATION_TABLE
+ #define TARGET_OPTION_OPTIMIZATION_TABLE microblaze_option_optimization_table
+
+-#undef TARGET_EXCEPT_UNWIND_INFO
+-#define TARGET_EXCEPT_UNWIND_INFO sjlj_except_unwind_info
+-
+ struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
+diff --git a/gcc/config/microblaze/microblaze-protos.h b/gcc/config/microblaze/microblaze-protos.h
+index 34be76f..201390b 100644
+--- a/gcc/config/microblaze/microblaze-protos.h
++++ b/gcc/config/microblaze/microblaze-protos.h
+@@ -54,6 +54,7 @@ extern bool microblaze_tls_referenced_p (rtx);
+ extern int symbol_mentioned_p (rtx);
+ extern int label_mentioned_p (rtx);
+ extern bool microblaze_cannot_force_const_mem (enum machine_mode, rtx);
++extern void microblaze_eh_return (rtx op0);
+ #endif /* RTX_CODE */
+
+ /* Declare functions in microblaze-c.c. */
+diff --git a/gcc/config/microblaze/microblaze.c b/gcc/config/microblaze/microblaze.c
+index c121c2b..5f4bc60 100644
+--- a/gcc/config/microblaze/microblaze.c
++++ b/gcc/config/microblaze/microblaze.c
+@@ -1896,6 +1896,11 @@ microblaze_must_save_register (int regno)
+ if (frame_pointer_needed && (regno == HARD_FRAME_POINTER_REGNUM))
+ return 1;
+
++ if (crtl->calls_eh_return
++ && regno == MB_ABI_SUB_RETURN_ADDR_REGNUM) {
++ return 1;
++ }
++
+ if (!crtl->is_leaf)
+ {
+ if (regno == MB_ABI_SUB_RETURN_ADDR_REGNUM)
+@@ -1923,6 +1928,13 @@ microblaze_must_save_register (int regno)
+ return 1;
+ }
+
++ if (crtl->calls_eh_return
++ && (regno == EH_RETURN_DATA_REGNO (0)
++ || regno == EH_RETURN_DATA_REGNO (1)))
++ {
++ return 1;
++ }
++
+ return 0;
+ }
+
+@@ -2939,6 +2951,12 @@ microblaze_expand_epilogue (void)
+ emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, fsiz_rtx));
+ }
+
++ if (crtl->calls_eh_return)
++ emit_insn (gen_addsi3 (stack_pointer_rtx,
++ stack_pointer_rtx,
++ gen_rtx_raw_REG (SImode,
++ MB_EH_STACKADJ_REGNUM)));
++
+ emit_jump_insn (gen_return_internal (gen_rtx_REG (Pmode, GP_REG_FIRST +
+ MB_ABI_SUB_RETURN_ADDR_REGNUM)));
+ }
+@@ -3166,10 +3184,13 @@ microblaze_return_addr (int count, rtx frame ATTRIBUTE_UNUSED)
+ if (count != 0)
+ return NULL_RTX;
+
+- return gen_rtx_PLUS (Pmode,
+- get_hard_reg_initial_val (Pmode,
+- MB_ABI_SUB_RETURN_ADDR_REGNUM),
+- GEN_INT (8));
++ return get_hard_reg_initial_val (Pmode,
++ MB_ABI_SUB_RETURN_ADDR_REGNUM);
++}
++
++void microblaze_eh_return (rtx op0)
++{
++ emit_insn (gen_movsi(gen_rtx_MEM(Pmode, stack_pointer_rtx), op0));
+ }
+
+ /* Queue an .ident string in the queue of top-level asm statements.
+diff --git a/gcc/config/microblaze/microblaze.h b/gcc/config/microblaze/microblaze.h
+index bc4d9a1..074b78e 100644
+--- a/gcc/config/microblaze/microblaze.h
++++ b/gcc/config/microblaze/microblaze.h
+@@ -184,6 +184,21 @@ extern enum pipeline_type microblaze_pipe;
+ #define INCOMING_RETURN_ADDR_RTX \
+ gen_rtx_REG (VOIDmode, GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM)
+
++/* Specifies the offset from INCOMING_RETURN_ADDR_RTX and the actual return PC. */
++#define RETURN_ADDR_OFFSET (8)
++
++/* Describe how we implement __builtin_eh_return. */
++#define EH_RETURN_DATA_REGNO(N) (((N) < 2) ? MB_ABI_FIRST_ARG_REGNUM + (N) : INVALID_REGNUM)
++
++#define MB_EH_STACKADJ_REGNUM MB_ABI_INT_RETURN_VAL2_REGNUM
++#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, MB_EH_STACKADJ_REGNUM)
++
++/* Select a format to encode pointers in exception handling data. CODE
++ is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
++ true if the symbol may be affected by dynamic relocations. */
++#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
++ ((flag_pic || GLOBAL) ? DW_EH_PE_aligned : DW_EH_PE_absptr)
++
+ /* Use DWARF 2 debugging information by default. */
+ #define DWARF2_DEBUGGING_INFO
+ #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
+diff --git a/gcc/config/microblaze/microblaze.md b/gcc/config/microblaze/microblaze.md
+index 3618cad..4e7fe3b 100644
+--- a/gcc/config/microblaze/microblaze.md
++++ b/gcc/config/microblaze/microblaze.md
+@@ -2221,3 +2221,13 @@
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")
+ (set_attr "length" "4")])
++
++; This is used in compiling the unwind routines.
++(define_expand "eh_return"
++ [(use (match_operand 0 "general_operand" ""))]
++ ""
++ "
++{
++ microblaze_eh_return(operands[0]);
++ DONE;
++}")
+--
+1.7.5.4
+