path: root/0017-64bit-Cygwin-uses-SEH.patch

From 99bbc5fbd35295bcf8f7f2d316b2b084fd24f691 Mon Sep 17 00:00:00 2001
From: Jonathan Yong <10walls@gmail.com>
Date: Sat, 28 Jun 2014 10:01:33 +0800
Subject: [PATCH 17/24] 64bit Cygwin uses SEH

---
 gcc/ada/seh_init.c               |  15 +--
 gcc/ada/system-cygwin-x86_64.ads | 198 +++++++++++++++++++++++++++++++++++++++
 gcc/ada/tracebak.c               |   2 +-
 3 files changed, 207 insertions(+), 8 deletions(-)
 create mode 100644 gcc/ada/system-cygwin-x86_64.ads

diff --git a/gcc/ada/seh_init.c b/gcc/ada/seh_init.c
index 0d04b50..3c3d4a2 100644
--- a/gcc/ada/seh_init.c
+++ b/gcc/ada/seh_init.c
@@ -40,6 +40,7 @@
 #define xmalloc(S) malloc (S)
 
 #else
+#define FLEX_SCANNER	/* do not poison malloc */
 #include "config.h"
 #include "system.h"
 #endif
@@ -64,7 +65,7 @@ extern void Raise_From_Signal_Handler (struct Exception_Data *, const char *)
   ATTRIBUTE_NORETURN;
 
 
-#if defined (_WIN32)
+#if defined (_WIN32) || defined(__CYGWIN__)
 
 #include <windows.h>
 #include <excpt.h>
@@ -170,7 +171,7 @@ __gnat_map_SEH (EXCEPTION_RECORD* ExceptionRecord, const char **msg)
     }
 }
 
-#if !(defined (_WIN64) && defined (__SEH__))
+#if !(defined (__x86_64__) && defined (__SEH__))
 
 EXCEPTION_DISPOSITION
 __gnat_SEH_error_handler (struct _EXCEPTION_RECORD* ExceptionRecord,
@@ -189,7 +190,7 @@ __gnat_SEH_error_handler (struct _EXCEPTION_RECORD* ExceptionRecord,
       msg = "unhandled signal";
     }
 
-#if ! defined (_WIN64)
+#if !defined(_WIN64) && !defined(__CYGWIN__)
   /* This call is important as it avoids locking the second time we catch a
      signal. Note that this routine is documented as internal to Windows and
      should not be used.  */
@@ -200,9 +201,9 @@ __gnat_SEH_error_handler (struct _EXCEPTION_RECORD* ExceptionRecord,
 
   Raise_From_Signal_Handler (exception, msg);
 }
-#endif /* !(defined (_WIN64) && defined (__SEH__)) */
+#endif /* !(defined (__x86_64__) && defined (__SEH__)) */
 
-#if defined (_WIN64)
+#if defined (__x86_64__)
 /*  On x86_64 windows exception mechanism is no more based on a chained list
     of handlers addresses on the stack. Instead unwinding information is used
     to retrieve the exception handler (similar to ZCX GCC mechanism). So in
@@ -255,7 +256,7 @@ void __gnat_install_SEH_handler (void *eh ATTRIBUTE_UNUSED)
      just above.  */
 }
 
-#else /* defined (_WIN64) */
+#else /* defined (__x86_64__) */
 /*  Install the Win32 SEH exception handler. Note that the caller must have
     allocated 8 bytes on the stack and pass the pointer to this stack
     space. This is needed as the SEH exception handler must be on the stack of
@@ -288,7 +289,7 @@ __gnat_install_SEH_handler (void *ER)
 }
 #endif
 
-#else /* defined (_WIN32) */
+#else /* defined (_WIN32) || defined(__CYGWIN__) */
 /* For all non Windows targets we provide a dummy SEH install handler.  */
 void __gnat_install_SEH_handler (void *eh ATTRIBUTE_UNUSED)
 {
diff --git a/gcc/ada/system-cygwin-x86_64.ads b/gcc/ada/system-cygwin-x86_64.ads
new file mode 100644
index 0000000..9305ec1
--- /dev/null
+++ b/gcc/ada/system-cygwin-x86_64.ads
@@ -0,0 +1,198 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                        GNAT RUN-TIME COMPONENTS                          --
+--                                                                          --
+--                               S Y S T E M                                --
+--                                                                          --
+--                                 S p e c                                  --
+--                            (Cygwin  Version)                             --
+--                                                                          --
+--          Copyright (C) 1992-2007, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the  contents of the part following the private keyword. --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
+-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, USA.                                              --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package System is
+   pragma Pure;
+   --  Note that we take advantage of the implementation permission to make
+   --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
+   --  2005, this is Pure in any case (AI-362).
+
+   type Name is (SYSTEM_NAME_GNAT);
+   System_Name : constant Name := SYSTEM_NAME_GNAT;
+
+   --  System-Dependent Named Numbers
+
+   Min_Int               : constant := Long_Long_Integer'First;
+   Max_Int               : constant := Long_Long_Integer'Last;
+
+   Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
+   Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
+
+   Max_Base_Digits       : constant := Long_Long_Float'Digits;
+   Max_Digits            : constant := Long_Long_Float'Digits;
+
+   Max_Mantissa          : constant := 63;
+   Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);
+
+   Tick                  : constant := 0.01;
+
+   --  Storage-related Declarations
+
+   type Address is private;
+   pragma Preelaborable_Initialization (Address);
+   Null_Address : constant Address;
+
+   Storage_Unit : constant := 8;
+   Word_Size    : constant := 64;
+   Memory_Size  : constant := 2 ** 64;
+
+   --  Address comparison
+
+   function "<"  (Left, Right : Address) return Boolean;
+   function "<=" (Left, Right : Address) return Boolean;
+   function ">"  (Left, Right : Address) return Boolean;
+   function ">=" (Left, Right : Address) return Boolean;
+   function "="  (Left, Right : Address) return Boolean;
+
+   pragma Import (Intrinsic, "<");
+   pragma Import (Intrinsic, "<=");
+   pragma Import (Intrinsic, ">");
+   pragma Import (Intrinsic, ">=");
+   pragma Import (Intrinsic, "=");
+
+   --  Other System-Dependent Declarations
+
+   type Bit_Order is (High_Order_First, Low_Order_First);
+   Default_Bit_Order : constant Bit_Order := Low_Order_First;
+   pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
+
+   --  Priority-related Declarations (RM D.1)
+
+   Max_Priority           : constant Positive := 30;
+   Max_Interrupt_Priority : constant Positive := 31;
+
+   subtype Any_Priority       is Integer      range  0 .. 31;
+   subtype Priority           is Any_Priority range  0 .. 30;
+   subtype Interrupt_Priority is Any_Priority range 31 .. 31;
+
+   Default_Priority : constant Priority := 15;
+
+private
+
+   type Address is mod Memory_Size;
+   Null_Address : constant Address := 0;
+
+   --------------------------------------
+   -- System Implementation Parameters --
+   --------------------------------------
+
+   --  These parameters provide information about the target that is used
+   --  by the compiler. They are in the private part of System, where they
+   --  can be accessed using the special circuitry in the Targparm unit
+   --  whose source should be consulted for more detailed descriptions
+   --  of the individual switch values.
+
+   Backend_Divide_Checks     : constant Boolean := False;
+   Backend_Overflow_Checks   : constant Boolean := False;
+   Command_Line_Args         : constant Boolean := True;
+   Configurable_Run_Time     : constant Boolean := False;
+   Denorm                    : constant Boolean := True;
+   Duration_32_Bits          : constant Boolean := False;
+   Exit_Status_Supported     : constant Boolean := True;
+   Fractional_Fixed_Ops      : constant Boolean := False;
+   Frontend_Layout           : constant Boolean := False;
+   Machine_Overflows         : constant Boolean := False;
+   Machine_Rounds            : constant Boolean := True;
+   Preallocated_Stacks       : constant Boolean := False;
+   Signed_Zeros              : constant Boolean := True;
+   Stack_Check_Default       : constant Boolean := False;
+   Stack_Check_Probes        : constant Boolean := True;
+   Stack_Check_Limits        : constant Boolean := False;
+   Support_64_Bit_Divides    : constant Boolean := True;
+   Support_Aggregates        : constant Boolean := True;
+   Support_Composite_Assign  : constant Boolean := True;
+   Support_Composite_Compare : constant Boolean := True;
+   Support_Long_Shifts       : constant Boolean := True;
+   Always_Compatible_Rep     : constant Boolean := True;
+   Suppress_Standard_Library : constant Boolean := False;
+   Use_Ada_Main_Program_Name : constant Boolean := False;
+   ZCX_By_Default            : constant Boolean := True;
+
+   ---------------------------
+   -- Underlying Priorities --
+   ---------------------------
+
+   --  Important note: this section of the file must come AFTER the
+   --  definition of the system implementation parameters to ensure
+   --  that the value of these parameters is available for analysis
+   --  of the declarations here (using Rtsfind at compile time).
+
+   --  The underlying priorities table provides a generalized mechanism
+   --  for mapping from Ada priorities to system priorities. In some
+   --  cases a 1-1 mapping is not the convenient or optimal choice.
+
+   type Priorities_Mapping is array (Any_Priority) of Integer;
+   pragma Suppress_Initialization (Priorities_Mapping);
+   --  Suppress initialization in case gnat.adc specifies Normalize_Scalars
+
+   Underlying_Priorities : constant Priorities_Mapping :=
+     (Priority'First ..
+      Default_Priority - 8    => -15,
+      Default_Priority - 7    => -7,
+      Default_Priority - 6    => -6,
+      Default_Priority - 5    => -5,
+      Default_Priority - 4    => -4,
+      Default_Priority - 3    => -3,
+      Default_Priority - 2    => -2,
+      Default_Priority - 1    => -1,
+      Default_Priority        => 0,
+      Default_Priority + 1    => 1,
+      Default_Priority + 2    => 2,
+      Default_Priority + 3    => 3,
+      Default_Priority + 4    => 4,
+      Default_Priority + 5    => 5,
+      Default_Priority + 6 ..
+      Priority'Last           => 6,
+      Interrupt_Priority      => 15);
+   --  The default mapping preserves the standard 31 priorities of the Ada
+   --  model, but maps them using compression onto the 7 priority levels
+   --  available in NT and on the 16 priority levels available in 2000/XP.
+
+   --  To replace the default values of the Underlying_Priorities mapping,
+   --  copy this source file into your build directory, edit the file to
+   --  reflect your desired behavior, and recompile using Makefile.adalib
+   --  which can be found under the adalib directory of your gnat installation
+
+   pragma Linker_Options ("-Wl,--stack=0x2000000");
+   --  This is used to change the default stack (32 MB) size for non tasking
+   --  programs. We change this value for GNAT on Windows here because the
+   --  binutils on this platform have switched to a too low value for Ada
+   --  programs. Note that we also set the stack size for tasking programs in
+   --  System.Task_Primitives.Operations.
+
+end System;
diff --git a/gcc/ada/tracebak.c b/gcc/ada/tracebak.c
index 4efb75e..1964c4f 100644
--- a/gcc/ada/tracebak.c
+++ b/gcc/ada/tracebak.c
@@ -107,7 +107,7 @@ extern void (*Unlock_Task) (void);
 
 #include "tb-ivms.c"
 
-#elif defined (_WIN64) && defined (__SEH__)
+#elif (defined (_WIN64) || defined(__CYGWIN__)) && defined (__SEH__)
 
 #include <windows.h>
 
-- 
2.1.1