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[PATCH v2 11/13] D: GCC builtins and runtime support.
- From: Iain Buclaw <ibuclaw at gdcproject dot org>
- To: gcc-patches <gcc-patches at gcc dot gnu dot org>
- Cc: "Joseph S. Myers" <joseph at codesourcery dot com>
- Date: Sat, 24 Jun 2017 19:53:55 +0200
- Subject: [PATCH v2 11/13] D: GCC builtins and runtime support.
- Authentication-results: sourceware.org; auth=none
On 28 May 2017 at 23:17, Iain Buclaw <ibuclaw@gdcproject.org> wrote:
> This patch adds GCC builtins and runtime support for GDC compiled code.
>
> - module __entrypoint defines the C main function. Its contents are
> parsed and compiled in during compilation, but only if needed.
> - module gcc.atomic is a deprecated module that defines templated
> __sync builtins. It's original user, core.atomic, now uses the GCC
> __atomic builtins.
> - module gcc.attribute exposes GDC-specific attributes.
> - module gcc.backtrace implements backtrace support for GDC.
> - module gcc.builtins exposes GCC builtins to D code.
> - module gcc.config exposes things determined at configure time to D code.
> - module gcc.deh implements D unwind EH.
> - module gcc.libbacktrace defines C bindings to libbacktrace.
> - module gcc.unwind defines C bindings to libgcc unwind library.
> - libgphobos.spec contains a list of libraries to link in that are
> dependencies of D runtime and/or the Phobos standard library. It is
> used by the GDC driver.
>
> ---
Added GCC Runtime Library Exception to gcc modules as requested.
Regards
Iain.
---
diff --git a/libphobos/libdruntime/__entrypoint.di b/libphobos/libdruntime/__entrypoint.di
new file mode 100644
index 00000000000..d04fe5d0889
--- /dev/null
+++ b/libphobos/libdruntime/__entrypoint.di
@@ -0,0 +1,56 @@
+/* GDC -- D front-end for GCC
+ Copyright (C) 2013 Free Software Foundation, Inc.
+
+ GCC is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3, or (at your option) any later
+ version.
+
+ GCC is distributed in the hope that it will be useful, but WITHOUT 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
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>.
+*/
+
+/* This module provides the C main() function supplied by the user's program. */
+
+module __entrypoint;
+
+extern(C):
+
+/* The D main() function supplied by the user's program
+
+ It always has `_Dmain` symbol name and uses C calling convention.
+ But D frontend returns its type as `extern(D)` because of Issue 9028.
+ As we need to deal with actual calling convention we have to mark it
+ as `extern(C)` and use its symbol name.
+*/
+
+int _Dmain(char[][] args);
+int _d_run_main(int argc, char **argv, void* mainFunc);
+
+/* Substitutes for the C main() function. Just calls into d_run_main with
+ the default main function. Applications are free to implement their own
+ main function and call the _d_run_main function themselves with any main
+ function.
+*/
+
+int main(int argc, char **argv)
+{
+ return _d_run_main(argc, argv, &_Dmain);
+}
+
+/* This is apparently needed on Solaris because the C tool chain seems to
+ expect the main function to be called _main. It needs both not just one!
+*/
+
+version (Solaris)
+int _main(int argc, char** argv)
+{
+ return main(argc, argv);
+}
+
diff --git a/libphobos/libdruntime/gcc/attribute.d b/libphobos/libdruntime/gcc/attribute.d
new file mode 100644
index 00000000000..2498c27e7cc
--- /dev/null
+++ b/libphobos/libdruntime/gcc/attribute.d
@@ -0,0 +1,33 @@
+// GNU D Compiler attribute support declarations.
+// Copyright (C) 2013-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+module gcc.attribute;
+
+private struct Attribute(A...)
+{
+ A args;
+}
+
+auto attribute(A...)(A args) if(A.length > 0 && is(A[0] == string))
+{
+ return Attribute!A(args);
+}
diff --git a/libphobos/libdruntime/gcc/backtrace.d b/libphobos/libdruntime/gcc/backtrace.d
new file mode 100644
index 00000000000..c24a53a42fb
--- /dev/null
+++ b/libphobos/libdruntime/gcc/backtrace.d
@@ -0,0 +1,575 @@
+// GNU D Compiler routines for stack backtrace support.
+// Copyright (C) 2013-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+module gcc.backtrace;
+
+import gcc.libbacktrace;
+
+
+version( Posix )
+{
+ // NOTE: The first 5 frames with the current implementation are
+ // inside core.runtime and the object code, so eliminate
+ // these for readability. The alternative would be to
+ // exclude the first N frames that are in a list of
+ // mangled function names.
+ static enum FIRSTFRAME = 5;
+}
+else
+{
+ // NOTE: On Windows, the number of frames to exclude is based on
+ // whether the exception is user or system-generated, so
+ // it may be necessary to exclude a list of function names
+ // instead.
+ static enum FIRSTFRAME = 0;
+}
+
+static if(BACKTRACE_SUPPORTED && !BACKTRACE_USES_MALLOC)
+{
+ import core.stdc.stdint, core.stdc.string, core.stdc.stdio;
+ enum MAXFRAMES = 128;
+
+ extern(C) int simpleCallback(void* data, uintptr_t pc)
+ {
+ auto context = cast(LibBacktrace)data;
+
+ if(context.numPCs == MAXFRAMES)
+ return 1;
+
+ context.pcs[context.numPCs++] = pc;
+ return 0;
+ }
+
+ /*
+ * Used for backtrace_create_state and backtrace_simple
+ */
+ extern(C) void simpleErrorCallback(void* data, const(char)* msg, int errnum)
+ {
+ if(data) //context is not available in backtrace_create_state
+ {
+ auto context = cast(LibBacktrace)data;
+ strncpy(context.errorBuf.ptr, msg, context.errorBuf.length - 1);
+ context.error = errnum;
+ }
+ }
+
+ /*
+ * Used for backtrace_pcinfo
+ */
+ extern(C) int pcinfoCallback(void* data, uintptr_t pc, const(char)* filename,
+ int lineno, const(char)* func)
+ {
+ auto context = cast(SymbolCallbackInfo*)data;
+
+ //Try to get the function name via backtrace_syminfo
+ if(func is null)
+ {
+ SymbolCallbackInfo2 info;
+ info.base = context;
+ info.filename = filename;
+ info.lineno = lineno;
+ if(backtrace_syminfo(context.state, pc, &syminfoCallback2, null, &info) != 0)
+ {
+ return context.retval;
+ }
+ }
+
+ auto sym = SymbolOrError(0, SymbolInfo(func, filename, lineno, cast(void*)pc));
+ context.retval = context.applyCB(context.num, sym);
+ context.num++;
+
+ return context.retval;
+ }
+
+ /*
+ * Used for backtrace_pcinfo and backtrace_syminfo
+ */
+ extern(C) void pcinfoErrorCallback(void* data, const(char)* msg, int errnum)
+ {
+ auto context = cast(SymbolCallbackInfo*)data;
+
+ if(errnum == -1)
+ {
+ context.noInfo = true;
+ return;
+ }
+
+ SymbolOrError symError;
+ symError.errnum = errnum;
+ symError.msg = msg;
+
+ size_t i = 0;
+ context.retval = context.applyCB(i, symError);
+ }
+
+ /*
+ * Used for backtrace_syminfo (in opApply)
+ */
+ extern(C) void syminfoCallback(void* data, uintptr_t pc,
+ const(char)* symname, uintptr_t symval)
+ {
+ auto context = cast(SymbolCallbackInfo*)data;
+
+ auto sym = SymbolOrError(0, SymbolInfo(symname, null, 0, cast(void*)pc));
+ context.retval = context.applyCB(context.num, sym);
+
+ context.num++;
+ }
+
+ /*
+ * This callback is used if backtrace_syminfo is called from the pcinfoCallback
+ * callback. It merges it's information with the information from pcinfoCallback.
+ */
+ extern(C) void syminfoCallback2(void* data, uintptr_t pc,
+ const(char)* symname, uintptr_t symval)
+ {
+ auto context = cast(SymbolCallbackInfo2*)data;
+
+ auto sym = SymbolOrError(0, SymbolInfo(symname, context.filename, context.lineno,
+ cast(void*)pc));
+ context.base.retval = context.base.applyCB(context.base.num, sym);
+
+ context.base.num++;
+ }
+
+ /*
+ * The callback type used with the opApply overload which returns a SymbolOrError
+ */
+ private alias scope int delegate(ref size_t, ref SymbolOrError) ApplyCallback;
+
+ /*
+ * Passed to syminfoCallback, pcinfoCallback and pcinfoErrorCallback
+ */
+ struct SymbolCallbackInfo
+ {
+ bool noInfo = false; //True if debug info / symbol table is not available
+ size_t num = 0; //Counter for opApply
+ int retval; //Value returned by applyCB
+ backtrace_state* state;
+
+ //info.fileName / funcName / errmsg may become invalid after this delegate returned
+ ApplyCallback applyCB;
+
+ void reset()
+ {
+ noInfo = false;
+ num = 0;
+ }
+ }
+
+ /*
+ * Passed to the syminfoCallback2 callback. That function merges it's
+ * funcName with this information and updates base as all other callbacks do.
+ */
+ struct SymbolCallbackInfo2
+ {
+ SymbolCallbackInfo* base;
+ const(char)* filename;
+ int lineno;
+ }
+
+ /*
+ * Contains a valid symbol or an error message if errnum is != 0.
+ */
+ struct SymbolOrError
+ {
+ int errnum; // == 0: No error
+ union
+ {
+ SymbolInfo symbol;
+ const(char)* msg;
+ }
+ }
+
+ //FIXME: state is never freed as libbacktrace doesn't provide a free function...
+ public class LibBacktrace : Throwable.TraceInfo
+ {
+ enum MaxAlignment = (void*).alignof;
+
+ static void initLibBacktrace()
+ {
+ if(!initialized)
+ {
+ state = backtrace_create_state(null, false, &simpleErrorCallback, null);
+ initialized = true;
+ }
+ }
+
+ this(int firstFrame = FIRSTFRAME)
+ {
+ _firstFrame = firstFrame;
+
+ initLibBacktrace();
+
+ if(state)
+ {
+ backtrace_simple(state, _firstFrame, &simpleCallback,
+ &simpleErrorCallback, cast(void*)this);
+ }
+ }
+
+ override int opApply( scope int delegate(ref const(char[])) dg ) const
+ {
+ return opApply( (ref size_t, ref const(char[]) buf)
+ {
+ return dg( buf );
+ } );
+ }
+
+ override int opApply( scope int delegate(ref size_t, ref const(char[])) dg ) const
+ {
+ return opApply( (ref size_t i, ref SymbolOrError sym)
+ {
+ char[512] buffer = '\0';
+ char[] msg;
+ if(sym.errnum != 0)
+ {
+ auto retval = snprintf(buffer.ptr, buffer.length,
+ "libbacktrace error: '%s' errno: %d", sym.msg, sym.errnum);
+
+ if(retval >= buffer.length)
+ msg = buffer[0 .. $-1]; //Ignore zero terminator
+ else if(retval > 0)
+ msg = buffer[0 .. retval];
+ }
+ else
+ {
+ msg = formatLine(sym.symbol, buffer);
+ }
+
+ return dg(i, msg);
+ } );
+ }
+
+ int opApply(ApplyCallback dg) const
+ {
+ //If backtrace_simple produced an error report it and exit
+ if(!state || error != 0)
+ {
+ size_t pos = 0;
+ SymbolOrError symError;
+ symError.errnum = error;
+ symError.msg = errorBuf.ptr;
+
+ return dg(pos, symError);
+ }
+
+ SymbolCallbackInfo cinfo;
+ cinfo.applyCB = dg;
+ cinfo.state = cast(backtrace_state*)state;
+
+ //Try using debug info first
+ foreach(i, pc; pcs[0 .. numPCs])
+ {
+ //FIXME: We may violate const guarantees here...
+ if(backtrace_pcinfo(cast(backtrace_state*)state, pc, &pcinfoCallback,
+ &pcinfoErrorCallback, &cinfo) != 0)
+ {
+ break; //User delegate requested abort or no debug info at all
+ }
+ }
+
+ //If no error or other error which has already been reported via callback
+ if(!cinfo.noInfo)
+ return cinfo.retval;
+
+ //Try using symbol table
+ cinfo.reset();
+ foreach(pc; pcs[0 .. numPCs])
+ {
+ if(backtrace_syminfo(cast(backtrace_state*)state, pc, &syminfoCallback,
+ &pcinfoErrorCallback, &cinfo) == 0)
+ {
+ break;
+ }
+ }
+
+ if(!cinfo.noInfo)
+ return cinfo.retval;
+
+ //No symbol table
+ foreach(i, pc; pcs[0 .. numPCs])
+ {
+ auto sym = SymbolOrError(0, SymbolInfo(null, null, 0, cast(void*)pc));
+ if(auto ret = dg(i, sym) != 0)
+ return ret;
+ }
+
+ return 0;
+ }
+
+ override string toString() const
+ {
+ string buf;
+ foreach(i, const(char[]) line; this )
+ buf ~= i ? "\n" ~ line : line;
+ return buf;
+ }
+
+ private:
+ static backtrace_state* state = null;
+ static bool initialized = false;
+ size_t numPCs = 0;
+ uintptr_t[MAXFRAMES] pcs;
+
+ int error = 0;
+ int _firstFrame = 0;
+ char[128] errorBuf;
+ }
+}
+else
+{
+ /*
+ * Our fallback backtrace implementation using libgcc's unwind
+ * and backtrace support. In theory libbacktrace should be available
+ * everywhere where this code works. We keep it anyway till libbacktrace
+ * is well-tested.
+ */
+ public class UnwindBacktrace : Throwable.TraceInfo
+ {
+ this(int firstFrame = FIRSTFRAME)
+ {
+ _firstFrame = firstFrame;
+ _callstack = getBacktrace();
+ _framelist = getBacktraceSymbols(_callstack);
+ }
+
+ override int opApply( scope int delegate(ref const(char[])) dg ) const
+ {
+ return opApply( (ref size_t, ref const(char[]) buf)
+ {
+ return dg( buf );
+ } );
+ }
+
+ override int opApply( scope int delegate(ref size_t, ref const(char[])) dg ) const
+ {
+ int ret = 0;
+ char[512] fixbuf = '\0';
+
+ for( int i = _firstFrame; i < _framelist.entries; ++i )
+ {
+ auto pos = cast(size_t)(i - _firstFrame);
+ auto buf = formatLine(_framelist.symbols[i], fixbuf);
+ ret = dg( pos, buf );
+ if( ret )
+ break;
+ }
+ return ret;
+ }
+
+ override string toString() const
+ {
+ string buf;
+ foreach( i, line; this )
+ buf ~= i ? "\n" ~ line : line;
+ return buf;
+ }
+
+ private:
+ BTSymbolData _framelist;
+ UnwindBacktraceData _callstack;
+ int _firstFrame = 0;
+ }
+
+ // Implementation details
+ private:
+ import gcc.unwind;
+
+ static enum MAXFRAMES = 128;
+
+ struct UnwindBacktraceData
+ {
+ void*[MAXFRAMES] callstack;
+ int numframes = 0;
+ }
+
+ struct BTSymbolData
+ {
+ size_t entries;
+ SymbolInfo[MAXFRAMES] symbols;
+ }
+
+ static extern (C) _Unwind_Reason_Code unwindCB(_Unwind_Context *ctx, void *d)
+ {
+ UnwindBacktraceData* bt = cast(UnwindBacktraceData*)d;
+ if(bt.numframes >= MAXFRAMES)
+ return _URC_NO_REASON;
+
+ bt.callstack[bt.numframes] = cast(void*)_Unwind_GetIP(ctx);
+ bt.numframes++;
+ return _URC_NO_REASON;
+ }
+
+ UnwindBacktraceData getBacktrace()
+ {
+ UnwindBacktraceData stackframe;
+ _Unwind_Backtrace(&unwindCB, &stackframe);
+ return stackframe;
+ }
+
+ BTSymbolData getBacktraceSymbols(UnwindBacktraceData data)
+ {
+ BTSymbolData symData;
+
+ for(auto i = 0; i < data.numframes; i++)
+ {
+ static if(HAVE_DLADDR)
+ {
+ Dl_info funcInfo;
+
+ if(data.callstack[i] !is null && dladdr(data.callstack[i], &funcInfo) != 0)
+ {
+ symData.symbols[symData.entries].funcName = funcInfo.dli_sname;
+
+ symData.symbols[symData.entries].address = data.callstack[i];
+ symData.entries++;
+ }
+ else
+ {
+ symData.symbols[symData.entries].address = data.callstack[i];
+ symData.entries++;
+ }
+ }
+ else
+ {
+ symData.symbols[symData.entries].address = data.callstack[i];
+ symData.entries++;
+ }
+ }
+
+ return symData;
+ }
+}
+
+/*
+ * Struct representing a symbol (function) in the backtrace
+ */
+struct SymbolInfo
+{
+ const(char)* funcName, fileName;
+ size_t line;
+ const(void)* address;
+}
+
+/*
+ * Format one output line for symbol sym.
+ * Returns a slice of fixbuf.
+ */
+char[] formatLine(const SymbolInfo sym, ref char[512] fixbuf)
+{
+ import core.demangle, core.stdc.config;
+ import core.stdc.stdio : snprintf, printf;
+ import core.stdc.string : strlen;
+
+ int ret;
+
+ ret = snprintf(fixbuf.ptr, fixbuf.sizeof, "0x%lx ", cast(c_ulong)sym.address);
+ if(ret >= fixbuf.sizeof)
+ return fixbuf[0 .. $-1]; //Ignore zero terminator
+
+ if(sym.funcName is null)
+ {
+ if(!(fixbuf.sizeof - ret > 3))
+ return fixbuf[0 .. ret];
+
+ fixbuf[ret] = fixbuf[ret+1] = fixbuf[ret+2] = '?';
+ ret += 3;
+ }
+ else
+ {
+ auto demangled = demangle(sym.funcName[0 .. strlen(sym.funcName)],
+ fixbuf[ret .. $-1]);
+
+ ret += demangled.length;
+ if(ret + 1 >= fixbuf.sizeof)
+ return fixbuf[0 .. $-1]; //Ignore zero terminator
+ }
+
+ ret += snprintf(fixbuf.ptr + ret, fixbuf.sizeof - ret, "\n\t%s:%d",
+ sym.fileName is null ? "???" : sym.fileName,
+ sym.line);
+
+ if(ret >= fixbuf.sizeof)
+ return fixbuf[0 .. $-1]; //Ignore zero terminator
+ else
+ return fixbuf[0 .. ret];
+}
+
+
+unittest
+{
+ char[512] sbuf = '\0';
+ char[] result;
+ string longString;
+ for(size_t i = 0; i < 60; i++)
+ longString ~= "abcdefghij";
+ longString ~= '\0';
+
+ auto symbol = SymbolInfo(null, null, 0, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo(longString.ptr, null, 0, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo("func", "test.d", 0, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo("func", longString.ptr, 0, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo(longString.ptr, "test.d", 0, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo(longString.ptr, longString.ptr, 0, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo("func", "test.d", 1000, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo(null, (longString[0..500] ~ '\0').ptr, 100000000, null);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo("func", "test.d", 0, cast(void*)0x100000);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo("func", null, 0, cast(void*)0x100000);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo(null, "test.d", 0, cast(void*)0x100000);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+
+ symbol = SymbolInfo(longString.ptr, "test.d", 0, cast(void*)0x100000);
+ result = formatLine(symbol, sbuf);
+ assert(result.length < 512 && result.ptr[result.length] == '\0' && sbuf[$-1] == '\0');
+}
diff --git a/libphobos/libdruntime/gcc/builtins.d b/libphobos/libdruntime/gcc/builtins.d
new file mode 100644
index 00000000000..e4e0bf3481f
--- /dev/null
+++ b/libphobos/libdruntime/gcc/builtins.d
@@ -0,0 +1,44 @@
+/* GNU D Compiler bindings for built-in functions and types.
+ Copyright (C) 2006-2017 Free Software Foundation, Inc.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+/**
+ Declarations are automatically created by the compiler. All
+ declarations start with "__builtin_". Refer to _builtins.def in the
+ GCC source for a list of functions. Not all of the functions are
+ supported.
+
+ In addition to built-in functions, the following types are defined.
+
+ $(TABLE
+ $(TR $(TD ___builtin_va_list) $(TD The target's va_list type ))
+ $(TR $(TD ___builtin_clong ) $(TD The D equivalent of the target's
+ C "long" type ))
+ $(TR $(TD ___builtin_culong ) $(TD The D equivalent of the target's
+ C "unsigned long" type ))
+ $(TR $(TD ___builtin_machine_int ) $(TD Signed word-sized integer ))
+ $(TR $(TD ___builtin_machine_uint) $(TD Unsigned word-sized integer ))
+ $(TR $(TD ___builtin_pointer_int ) $(TD Signed pointer-sized integer ))
+ $(TR $(TD ___builtin_pointer_uint) $(TD Unsigned pointer-sized integer ))
+ )
+ */
+
+module gcc.builtins;
diff --git a/libphobos/libdruntime/gcc/config.d.in b/libphobos/libdruntime/gcc/config.d.in
new file mode 100644
index 00000000000..05013c09c47
--- /dev/null
+++ b/libphobos/libdruntime/gcc/config.d.in
@@ -0,0 +1,42 @@
+// GNU D Compiler configure constants.
+// Copyright (C) 2015-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+module gcc.config;
+
+// Does platform define __ARM_EABI_UNWINDER__
+enum GNU_ARM_EABI_Unwinder = @DCFG_ARM_EABI_UNWINDER@;
+
+// Map from thread model to thread interface.
+enum ThreadModel
+{
+ Single,
+ Posix,
+ Win32,
+}
+
+enum ThreadModel GNU_Thread_Model = ThreadModel.@DCFG_THREAD_MODEL@;
+
+// Whether the linker provides __start_minfo and __stop_minfo symbols
+enum Minfo_Bracketing = @DCFG_MINFO_BRACKETING@;
+
+// Do we have libatomic available
+enum HAVE_LIBATOMIC = @DCFG_HAVE_LIBATOMIC@;
diff --git a/libphobos/libdruntime/gcc/deh.d b/libphobos/libdruntime/gcc/deh.d
new file mode 100644
index 00000000000..4630504f58a
--- /dev/null
+++ b/libphobos/libdruntime/gcc/deh.d
@@ -0,0 +1,964 @@
+// GNU D Compiler exception personality routines.
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This code is based on the libstdc++ exception handling routines.
+
+module gcc.deh;
+
+import gcc.unwind;
+import gcc.unwind.pe;
+import gcc.builtins;
+import gcc.config;
+
+extern(C)
+{
+ int _d_isbaseof(ClassInfo, ClassInfo);
+ void _d_createTrace(Object, void*);
+
+ // Not used in GDC but declaration required by rt/sections.d
+ struct FuncTable
+ {
+ }
+}
+
+/**
+ * Declare all known and handled exception classes.
+ * D exceptions -- "GNUCD\0\0\0".
+ * C++ exceptions -- "GNUCC++\0"
+ * C++ dependent exceptions -- "GNUCC++\x01"
+ */
+static if (GNU_ARM_EABI_Unwinder)
+{
+ enum _Unwind_Exception_Class gdcExceptionClass = "GNUCD\0\0\0";
+ enum _Unwind_Exception_Class gxxExceptionClass = "GNUCC++\0";
+ enum _Unwind_Exception_Class gxxDependentExceptionClass = "GNUCC++\x01";
+}
+else
+{
+ enum _Unwind_Exception_Class gdcExceptionClass =
+ (cast(_Unwind_Exception_Class)'G' << 56) |
+ (cast(_Unwind_Exception_Class)'N' << 48) |
+ (cast(_Unwind_Exception_Class)'U' << 40) |
+ (cast(_Unwind_Exception_Class)'C' << 32) |
+ (cast(_Unwind_Exception_Class)'D' << 24);
+
+ enum _Unwind_Exception_Class gxxExceptionClass =
+ (cast(_Unwind_Exception_Class)'G' << 56) |
+ (cast(_Unwind_Exception_Class)'N' << 48) |
+ (cast(_Unwind_Exception_Class)'U' << 40) |
+ (cast(_Unwind_Exception_Class)'C' << 32) |
+ (cast(_Unwind_Exception_Class)'C' << 24) |
+ (cast(_Unwind_Exception_Class)'+' << 16) |
+ (cast(_Unwind_Exception_Class)'+' << 8) |
+ (cast(_Unwind_Exception_Class)0 << 0);
+
+ enum _Unwind_Exception_Class gxxDependentExceptionClass =
+ gxxExceptionClass + 1;
+}
+
+/**
+ * Checks for GDC exception class.
+ */
+bool isGdcExceptionClass(_Unwind_Exception_Class c) @nogc
+{
+ static if (GNU_ARM_EABI_Unwinder)
+ {
+ return c[0] == gdcExceptionClass[0]
+ && c[1] == gdcExceptionClass[1]
+ && c[2] == gdcExceptionClass[2]
+ && c[3] == gdcExceptionClass[3]
+ && c[4] == gdcExceptionClass[4]
+ && c[5] == gdcExceptionClass[5]
+ && c[6] == gdcExceptionClass[6]
+ && c[7] == gdcExceptionClass[7];
+ }
+ else
+ {
+ return c == gdcExceptionClass;
+ }
+}
+
+/**
+ * Checks for any C++ exception class.
+ */
+bool isGxxExceptionClass(_Unwind_Exception_Class c) @nogc
+{
+ static if (GNU_ARM_EABI_Unwinder)
+ {
+ return c[0] == gxxExceptionClass[0]
+ && c[1] == gxxExceptionClass[1]
+ && c[2] == gxxExceptionClass[2]
+ && c[3] == gxxExceptionClass[3]
+ && c[4] == gxxExceptionClass[4]
+ && c[5] == gxxExceptionClass[5]
+ && c[6] == gxxExceptionClass[6]
+ && (c[7] == gxxExceptionClass[7]
+ || c[7] == gxxDependentExceptionClass[7]);
+ }
+ else
+ {
+ return c == gxxExceptionClass
+ || c == gxxDependentExceptionClass;
+ }
+}
+
+/**
+ * Checks for primary or dependent, but not that it is a C++ exception.
+ */
+bool isDependentException(_Unwind_Exception_Class c) @nogc
+{
+ static if (GNU_ARM_EABI_Unwinder)
+ return (c[7] == '\x01');
+ else
+ return (c & 1);
+}
+
+/**
+ * A D exception object consists of a header, which is a wrapper
+ * around an unwind object header with additional D specific
+ * information, prefixed by the exception object itself.
+ */
+struct ExceptionHeader
+{
+ // Because of a lack of __aligned__ style attribute, our object
+ // and the unwind object are the first two fields.
+ static if (Throwable.alignof < _Unwind_Exception.alignof)
+ ubyte[_Unwind_Exception.alignof - Throwable.alignof] pad;
+
+ // The object being thrown. The compiled code expects this to
+ // be immediately before the generic exception header.
+ Throwable object;
+
+ // The generic exception header.
+ _Unwind_Exception unwindHeader;
+
+ static assert(unwindHeader.offsetof - object.offsetof == object.sizeof);
+
+ // Cache handler details between Phase 1 and Phase 2.
+ static if (GNU_ARM_EABI_Unwinder)
+ {
+ // Nothing here yet.
+ }
+ else
+ {
+ // Which catch was found.
+ int handler;
+
+ // Language Specific Data Area for function enclosing the handler.
+ const(ubyte)* languageSpecificData;
+
+ // Pointer to catch code.
+ _Unwind_Ptr landingPad;
+ }
+
+ // Stack other thrown exceptions in current thread through here.
+ ExceptionHeader* next;
+
+ // Thread local stack of chained exceptions.
+ static ExceptionHeader* stack;
+
+ // Pre-allocate storage for 1 instance per thread.
+ // Use calloc/free for multiple exceptions in flight.
+ static ExceptionHeader ehstorage;
+
+ /**
+ * Allocate and initialize an ExceptionHeader.
+ */
+ static ExceptionHeader* create(Throwable o) @nogc
+ {
+ auto eh = &ehstorage;
+
+ // Check exception object in use.
+ if (eh.object)
+ {
+ eh = cast(ExceptionHeader*) __builtin_calloc(ExceptionHeader.sizeof, 1);
+ // Out of memory while throwing - not much else can be done.
+ if (!eh)
+ terminate(__LINE__);
+ }
+ eh.object = o;
+
+ eh.unwindHeader.exception_class = gdcExceptionClass;
+
+ return eh;
+ }
+
+ /**
+ * Free ExceptionHeader that was created by create().
+ */
+ static void free(ExceptionHeader* eh) @nogc
+ {
+ *eh = ExceptionHeader.init;
+ if (eh != &ehstorage)
+ __builtin_free(eh);
+ }
+
+ /**
+ * Push this onto stack of chained exceptions.
+ */
+ void push() @nogc
+ {
+ next = stack;
+ stack = &this;
+ }
+
+ /**
+ * Pop and return top of chained exception stack.
+ */
+ static ExceptionHeader* pop() @nogc
+ {
+ auto eh = stack;
+ stack = eh.next;
+ return eh;
+ }
+
+ /**
+ * Save stage1 handler information in the exception object.
+ */
+ static void save(_Unwind_Exception* unwindHeader,
+ _Unwind_Context* context, int handler,
+ const(ubyte)* lsda, _Unwind_Ptr landingPad) @nogc
+ {
+ static if (GNU_ARM_EABI_Unwinder)
+ {
+ unwindHeader.barrier_cache.sp = _Unwind_GetGR(context, UNWIND_STACK_REG);
+ unwindHeader.barrier_cache.bitpattern[1] = cast(_uw)handler;
+ unwindHeader.barrier_cache.bitpattern[2] = cast(_uw)lsda;
+ unwindHeader.barrier_cache.bitpattern[3] = cast(_uw)landingPad;
+ }
+ else
+ {
+ ExceptionHeader* eh = toExceptionHeader(unwindHeader);
+ eh.handler = handler;
+ eh.languageSpecificData = lsda;
+ eh.landingPad = landingPad;
+ }
+ }
+
+ /**
+ * Restore the catch handler data saved during phase1.
+ */
+ static void restore(_Unwind_Exception* unwindHeader, out int handler,
+ out const(ubyte)* lsda, out _Unwind_Ptr landingPad) @nogc
+ {
+ static if (GNU_ARM_EABI_Unwinder)
+ {
+ handler = cast(int)unwindHeader.barrier_cache.bitpattern[1];
+ lsda = cast(ubyte*)unwindHeader.barrier_cache.bitpattern[2];
+ landingPad = cast(_Unwind_Ptr)unwindHeader.barrier_cache.bitpattern[3];
+ }
+ else
+ {
+ ExceptionHeader* eh = toExceptionHeader(unwindHeader);
+ handler = eh.handler;
+ lsda = eh.languageSpecificData;
+ landingPad = cast(_Unwind_Ptr)eh.landingPad;
+ }
+ }
+
+ /**
+ * Look at the chain of inflight exceptions and pick the class type that'll
+ * be looked for in catch clauses.
+ */
+ static getClassInfo(_Unwind_Exception* unwindHeader) @nogc
+ {
+ ExceptionHeader* eh = toExceptionHeader(unwindHeader);
+ // The first thrown Exception at the top of the stack takes precedence
+ // over others that are inflight, unless an Error was thrown, in which
+ // case, we search for error handlers instead.
+ Throwable ehobject = eh.object;
+ for (ExceptionHeader* ehn = eh.next; ehn; ehn = ehn.next)
+ {
+ Error e = cast(Error)ehobject;
+ if (e is null || (cast(Error)ehn.object) !is null)
+ ehobject = ehn.object;
+ }
+ return ehobject.classinfo;
+ }
+
+ /**
+ * Convert from pointer to unwindHeader to pointer to ExceptionHeader
+ * that it is embedded inside of.
+ */
+ static ExceptionHeader* toExceptionHeader(_Unwind_Exception* exc) @nogc
+ {
+ return cast(ExceptionHeader*)(cast(void*)exc - ExceptionHeader.unwindHeader.offsetof);
+ }
+}
+
+/**
+ * Map to C++ std::type_info's virtual functions from D,
+ * being careful to not require linking with libstdc++.
+ * So it is given a different name.
+ */
+extern(C++) interface CxxTypeInfo
+{
+ void dtor1();
+ void dtor2();
+ bool __is_pointer_p() const;
+ bool __is_function_p() const;
+ bool __do_catch(const CxxTypeInfo, void**, uint) const;
+ bool __do_upcast(const void*, void**) const;
+}
+
+/**
+ * Structure of a C++ exception, represented as a C structure.
+ * See unwind-cxx.h for the full definition.
+ */
+struct CxaExceptionHeader
+{
+ union
+ {
+ CxxTypeInfo exceptionType;
+ void* primaryException;
+ }
+ void function(void*) exceptionDestructor;
+ void function() unexpectedHandler;
+ void function() terminateHandler;
+ CxaExceptionHeader* nextException;
+ int handlerCount;
+
+ static if (GNU_ARM_EABI_Unwinder)
+ {
+ CxaExceptionHeader* nextPropagatingException;
+ int propagationCount;
+ }
+ else
+ {
+ int handlerSwitchValue;
+ const(ubyte)* actionRecord;
+ const(ubyte)* languageSpecificData;
+ _Unwind_Ptr catchTemp;
+ void* adjustedPtr;
+ }
+
+ _Unwind_Exception unwindHeader;
+
+ /**
+ * There's no saving between phases, so only cache pointer.
+ * __cxa_begin_catch expects this to be set.
+ */
+ static void save(_Unwind_Exception* unwindHeader, void* thrownPtr) @nogc
+ {
+ static if (GNU_ARM_EABI_Unwinder)
+ unwindHeader.barrier_cache.bitpattern[0] = cast(_uw) thrownPtr;
+ else
+ {
+ auto eh = toExceptionHeader(unwindHeader);
+ eh.adjustedPtr = thrownPtr;
+ }
+ }
+
+ /**
+ * Get pointer to the thrown object if the thrown object type behind the
+ * exception is implicitly convertible to the catch type.
+ */
+ static void* getAdjustedPtr(_Unwind_Exception* exc, CxxTypeInfo catchType)
+ {
+ void* thrownPtr;
+
+ // A dependent C++ exceptions is just a wrapper around the unwind header.
+ // A primary C++ exception has the thrown object located immediately after it.
+ if (isDependentException(exc.exception_class))
+ thrownPtr = toExceptionHeader(exc).primaryException;
+ else
+ thrownPtr = cast(void*)(exc + 1);
+
+ // Pointer types need to adjust the actual pointer, not the pointer that is
+ // the exception object. This also has the effect of passing pointer types
+ // "by value" through the __cxa_begin_catch return value.
+ const throw_type = (cast(CxaExceptionHeader*)thrownPtr - 1).exceptionType;
+
+ if (throw_type.__is_pointer_p())
+ thrownPtr = *cast(void**)thrownPtr;
+
+ // Pointer adjustment may be necessary due to multiple inheritance
+ if (catchType is throw_type
+ || catchType.__do_catch(throw_type, &thrownPtr, 1))
+ return thrownPtr;
+
+ return null;
+ }
+
+ /**
+ * Convert from pointer to unwindHeader to pointer to CxaExceptionHeader
+ * that it is embedded inside of.
+ */
+ static CxaExceptionHeader* toExceptionHeader(_Unwind_Exception* exc) @nogc
+ {
+ return cast(CxaExceptionHeader*)(exc + 1) - 1;
+ }
+}
+
+/**
+ * Replaces std::terminate and terminating with a specific handler
+ */
+private void terminate(uint line) @nogc
+{
+ __builtin_printf("deh(%u) fatal error\n", line);
+ __builtin_trap();
+}
+
+/**
+ * Called when fibers switch contexts.
+ */
+extern(C) void* _d_eh_swapContext(void* newContext) nothrow
+{
+ auto old = ExceptionHeader.stack;
+ ExceptionHeader.stack = cast(ExceptionHeader*)newContext;
+ return old;
+}
+
+/**
+ * Called before starting a catch. Returns the exception object.
+ */
+extern(C) void* __gdc_begin_catch(_Unwind_Exception* unwindHeader)
+{
+ ExceptionHeader* header = ExceptionHeader.toExceptionHeader(unwindHeader);
+
+ void* objectp = cast(void*)header.object;
+
+ // Something went wrong when stacking up chained headers...
+ if (header != ExceptionHeader.pop())
+ terminate(__LINE__);
+
+ // Handling for this exception is complete.
+ _Unwind_DeleteException(&header.unwindHeader);
+
+ return objectp;
+}
+
+/**
+ * Perform a throw, D style. Throw will unwind through this call,
+ * so there better not be any handlers or exception thrown here.
+ */
+extern(C) void _d_throw(Throwable object)
+{
+ // If possible, avoid always allocating new memory for exception headers.
+ ExceptionHeader *eh = ExceptionHeader.create(object);
+
+ // Add to thrown exception stack.
+ eh.push();
+
+ // Called by unwinder when exception object needs destruction by other than our code.
+ extern(C) void exception_cleanup(_Unwind_Reason_Code code, _Unwind_Exception* exc)
+ {
+ // If we haven't been caught by a foreign handler, then this is
+ // some sort of unwind error. In that case just die immediately.
+ // _Unwind_DeleteException in the HP-UX IA64 libunwind library
+ // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT
+ // like the GCC _Unwind_DeleteException function does.
+ if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON)
+ terminate(__LINE__);
+
+ auto eh = ExceptionHeader.toExceptionHeader(exc);
+ ExceptionHeader.free(eh);
+ }
+
+ eh.unwindHeader.exception_cleanup = &exception_cleanup;
+
+ // Runtime now expects us to do this first before unwinding.
+ _d_createTrace(eh.object, null);
+
+ // We're happy with setjmp/longjmp exceptions or region-based
+ // exception handlers: entry points are provided here for both.
+ _Unwind_Reason_Code r = void;
+
+ version (GNU_SjLj_Exceptions)
+ r = _Unwind_SjLj_RaiseException(&eh.unwindHeader);
+ else
+ r = _Unwind_RaiseException(&eh.unwindHeader);
+
+ // If code == _URC_END_OF_STACK, then we reached top of stack without finding
+ // a handler for the exception. Since each thread is run in a try/catch,
+ // this oughtn't happen. If code is something else, we encountered some sort
+ // of heinous lossage from which we could not recover. As is the way of such
+ // things, almost certainly we will have crashed before now, rather than
+ // actually being able to diagnose the problem.
+ if (r == _URC_END_OF_STACK)
+ __builtin_printf("uncaught exception\n");
+
+ terminate(__LINE__);
+}
+
+
+/**
+ * Read and extract information from the LSDA (.gcc_except_table section).
+ */
+_Unwind_Reason_Code scanLSDA(const(ubyte)* lsda, _Unwind_Exception_Class exceptionClass,
+ _Unwind_Action actions, _Unwind_Exception* unwindHeader,
+ _Unwind_Context* context,
+ out _Unwind_Ptr landingPad, out int handler)
+{
+ // If no LSDA, then there are no handlers or cleanups.
+ if (lsda is null)
+ return CONTINUE_UNWINDING(unwindHeader, context);
+
+ // Parse the LSDA header
+ auto p = lsda;
+
+ auto Start = (context ? _Unwind_GetRegionStart(context) : 0);
+
+ // Find @LPStart, the base to which landing pad offsets are relative.
+ ubyte LPStartEncoding = *p++;
+ _Unwind_Ptr LPStart = 0;
+
+ if (LPStartEncoding != DW_EH_PE_omit)
+ LPStart = read_encoded_value(context, LPStartEncoding, &p);
+ else
+ LPStart = Start;
+
+ // Find @TType, the base of the handler and exception spec type data.
+ ubyte TTypeEncoding = *p++;
+ const(ubyte)* TType = null;
+
+ if (TTypeEncoding != DW_EH_PE_omit)
+ {
+ static if (__traits(compiles, _TTYPE_ENCODING))
+ {
+ // Older ARM EABI toolchains set this value incorrectly, so use a
+ // hardcoded OS-specific format.
+ TTypeEncoding = _TTYPE_ENCODING;
+ }
+ auto TTbase = read_uleb128(&p);
+ TType = p + TTbase;
+ }
+
+ // The encoding and length of the call-site table; the action table
+ // immediately follows.
+ ubyte CSEncoding = *p++;
+ auto CSTableSize = read_uleb128(&p);
+ const(ubyte)* actionTable = p + CSTableSize;
+
+ auto TTypeBase = base_of_encoded_value(TTypeEncoding, context);
+
+ // Get instruction pointer (ip) at start of instruction that threw.
+ version (CRuntime_Glibc)
+ {
+ int ip_before_insn;
+ auto ip = _Unwind_GetIPInfo(context, &ip_before_insn);
+ if (!ip_before_insn)
+ --ip;
+ }
+ else
+ {
+ auto ip = _Unwind_GetIP(context);
+ --ip;
+ }
+
+ bool saw_cleanup = false;
+ bool saw_handler = false;
+ const(ubyte)* actionRecord = null;
+
+ version (GNU_SjLj_Exceptions)
+ {
+ // The given "IP" is an index into the call-site table, with two
+ // exceptions -- -1 means no-action, and 0 means terminate.
+ // But since we're using uleb128 values, we've not got random
+ // access to the array.
+ if (cast(int) ip <= 0)
+ {
+ return _URC_CONTINUE_UNWIND;
+ }
+ else
+ {
+ _uleb128_t CSLandingPad, CSAction;
+ do
+ {
+ CSLandingPad = read_uleb128(&p);
+ CSAction = read_uleb128(&p);
+ }
+ while (--ip);
+
+ // Can never have null landing pad for sjlj -- that would have
+ // been indicated by a -1 call site index.
+ landingPad = CSLandingPad + 1;
+ if (CSAction)
+ actionRecord = actionTable + CSAction - 1;
+ }
+ }
+ else
+ {
+ // Search the call-site table for the action associated with this IP.
+ while (p < actionTable)
+ {
+ // Note that all call-site encodings are "absolute" displacements.
+ auto CSStart = read_encoded_value(null, CSEncoding, &p);
+ auto CSLen = read_encoded_value(null, CSEncoding, &p);
+ auto CSLandingPad = read_encoded_value(null, CSEncoding, &p);
+ auto CSAction = read_uleb128(&p);
+
+ // The table is sorted, so if we've passed the ip, stop.
+ if (ip < Start + CSStart)
+ p = actionTable;
+ else if (ip < Start + CSStart + CSLen)
+ {
+ if (CSLandingPad)
+ landingPad = LPStart + CSLandingPad;
+ if (CSAction)
+ actionRecord = actionTable + CSAction - 1;
+ break;
+ }
+ }
+ }
+
+ if (landingPad == 0)
+ {
+ // IP is present, but has a null landing pad.
+ // No cleanups or handlers to be run.
+ }
+ else if (actionRecord is null)
+ {
+ // If ip is present, has a non-null landing pad, and a null
+ // action table offset, then there are only cleanups present.
+ // Cleanups use a zero switch value, as set above.
+ saw_cleanup = true;
+ }
+ else
+ {
+ // Otherwise we have a catch handler or exception specification.
+ handler = actionTableLookup(actions, unwindHeader, actionRecord,
+ exceptionClass, TTypeBase,
+ TType, TTypeEncoding,
+ saw_handler, saw_cleanup);
+ }
+
+ // IP is not in table. No associated cleanups.
+ if (!saw_handler && !saw_cleanup)
+ return CONTINUE_UNWINDING(unwindHeader, context);
+
+ if (actions & _UA_SEARCH_PHASE)
+ {
+ if (!saw_handler)
+ return CONTINUE_UNWINDING(unwindHeader, context);
+
+ // For domestic exceptions, we cache data from phase 1 for phase 2.
+ if (isGdcExceptionClass(exceptionClass))
+ ExceptionHeader.save(unwindHeader, context, handler, lsda, landingPad);
+
+ return _URC_HANDLER_FOUND;
+ }
+
+ return 0;
+}
+
+/**
+ * Look up and return the handler index of the classType in Action Table.
+ */
+int actionTableLookup(_Unwind_Action actions, _Unwind_Exception* unwindHeader,
+ const(ubyte)* actionRecord, _Unwind_Exception_Class exceptionClass,
+ _Unwind_Ptr TTypeBase, const(ubyte)* TType,
+ ubyte TTypeEncoding,
+ out bool saw_handler, out bool saw_cleanup)
+{
+ ClassInfo thrownType;
+ if (isGdcExceptionClass(exceptionClass))
+ {
+ thrownType = ExceptionHeader.getClassInfo(unwindHeader);
+ }
+
+ while (1)
+ {
+ auto ap = actionRecord;
+ auto ARFilter = read_sleb128(&ap);
+ auto apn = ap;
+ auto ARDisp = read_sleb128(&ap);
+
+ if (ARFilter == 0)
+ {
+ // Zero filter values are cleanups.
+ saw_cleanup = true;
+ }
+ else if (actions & _UA_FORCE_UNWIND)
+ {
+ // During forced unwinding, we only run cleanups.
+ }
+ else if (ARFilter > 0)
+ {
+ // Positive filter values are handlers.
+ auto encodedSize = size_of_encoded_value(TTypeEncoding);
+
+ // ARFilter is the negative index from TType, which is where
+ // the ClassInfo is stored.
+ const(ubyte)* tp = TType - ARFilter * encodedSize;
+
+ auto entry = read_encoded_value_with_base(TTypeEncoding, TTypeBase, &tp);
+ ClassInfo ci = cast(ClassInfo)cast(void*)(entry);
+
+ // D does not have catch-all handlers, and so the following
+ // assumes that we will never handle a null value.
+ assert(ci !is null);
+
+ if (ci.classinfo is __cpp_type_info_ptr.classinfo
+ && isGxxExceptionClass(exceptionClass))
+ {
+ // catchType is the catch clause type_info.
+ auto catchType = cast(CxxTypeInfo)((cast(__cpp_type_info_ptr)cast(void*)ci).ptr);
+ auto thrownPtr = CxaExceptionHeader.getAdjustedPtr(unwindHeader, catchType);
+
+ if (thrownPtr !is null)
+ {
+ if (actions & _UA_SEARCH_PHASE)
+ CxaExceptionHeader.save(unwindHeader, thrownPtr);
+ saw_handler = true;
+ return cast(int)ARFilter;
+ }
+ }
+ else if (isGdcExceptionClass(exceptionClass)
+ && _d_isbaseof(thrownType, ci))
+ {
+ saw_handler = true;
+ return cast(int)ARFilter;
+ }
+ else
+ {
+ // ??? What to do about other GNU language exceptions.
+ }
+ }
+ else
+ {
+ // Negative filter values are exception specifications,
+ // which D does not use.
+ break;
+ }
+
+ if (ARDisp == 0)
+ break;
+ actionRecord = apn + ARDisp;
+ }
+
+ return 0;
+}
+
+/**
+ * Called when the personality function has found neither a cleanup or handler.
+ * To support ARM EABI personality routines, that must also unwind the stack.
+ */
+_Unwind_Reason_Code CONTINUE_UNWINDING(_Unwind_Exception* unwindHeader, _Unwind_Context* context)
+{
+ static if (GNU_ARM_EABI_Unwinder)
+ {
+ if (__gnu_unwind_frame(unwindHeader, context) != _URC_OK)
+ return _URC_FAILURE;
+ }
+ return _URC_CONTINUE_UNWIND;
+}
+
+/**
+ * Using a different personality function name causes link failures
+ * when trying to mix code using different exception handling models.
+ */
+version (GNU_SEH_Exceptions)
+{
+ enum PERSONALITY_FUNCTION = "__gdc_personality_imp";
+
+ extern(C) EXCEPTION_DISPOSITION __gdc_personality_seh0(void* ms_exc, void* this_frame,
+ void* ms_orig_context, void* ms_disp)
+ {
+ return _GCC_specific_handler(ms_exc, this_frame, ms_orig_context,
+ ms_disp, &__gdc_personality_imp);
+ }
+}
+else version (GNU_SjLj_Exceptions)
+{
+ enum PERSONALITY_FUNCTION = "__gdc_personality_sj0";
+
+ private int __builtin_eh_return_data_regno(int x) { return x; }
+}
+else
+{
+ enum PERSONALITY_FUNCTION = "__gdc_personality_v0";
+}
+
+/**
+ * The "personality" function, specific to each language.
+ */
+static if (GNU_ARM_EABI_Unwinder)
+{
+ pragma(mangle, PERSONALITY_FUNCTION)
+ extern(C) _Unwind_Reason_Code gdc_personality(_Unwind_State state,
+ _Unwind_Exception* unwindHeader,
+ _Unwind_Context* context)
+ {
+ _Unwind_Action actions;
+
+ switch (state & _US_ACTION_MASK)
+ {
+ case _US_VIRTUAL_UNWIND_FRAME:
+ // If the unwind state pattern is (_US_VIRTUAL_UNWIND_FRAME | _US_FORCE_UNWIND)
+ // then we don't need to search for any handler as it is not a real exception.
+ // Just unwind the stack.
+ if (state & _US_FORCE_UNWIND)
+ return CONTINUE_UNWINDING(unwindHeader, context);
+ actions = _UA_SEARCH_PHASE;
+ break;
+
+ case _US_UNWIND_FRAME_STARTING:
+ actions = _UA_CLEANUP_PHASE;
+ if (!(state & _US_FORCE_UNWIND)
+ && unwindHeader.barrier_cache.sp == _Unwind_GetGR(context, UNWIND_STACK_REG))
+ actions |= _UA_HANDLER_FRAME;
+ break;
+
+ case _US_UNWIND_FRAME_RESUME:
+ return CONTINUE_UNWINDING(unwindHeader, context);
+
+ default:
+ __builtin_abort();
+ }
+ actions |= state & _US_FORCE_UNWIND;
+
+ // The dwarf unwinder assumes the context structure holds things like
+ // the function and LSDA pointers. The ARM implementation caches these
+ // in the exception header (UCB). To avoid rewriting everything we make
+ // the virtual IP register point at the UCB.
+ _Unwind_SetGR(context, UNWIND_POINTER_REG, cast(_Unwind_Ptr)unwindHeader);
+
+ return __gdc_personality(actions, unwindHeader.exception_class,
+ unwindHeader, context);
+ }
+}
+else
+{
+ pragma(mangle, PERSONALITY_FUNCTION)
+ extern(C) _Unwind_Reason_Code gdc_personality(int iversion,
+ _Unwind_Action actions,
+ _Unwind_Exception_Class exceptionClass,
+ _Unwind_Exception* unwindHeader,
+ _Unwind_Context* context)
+ {
+ // Interface version check.
+ if (iversion != 1)
+ return _URC_FATAL_PHASE1_ERROR;
+
+ return __gdc_personality(actions, exceptionClass, unwindHeader, context);
+ }
+}
+
+private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
+ _Unwind_Exception_Class exceptionClass,
+ _Unwind_Exception* unwindHeader,
+ _Unwind_Context* context)
+{
+ const(ubyte)* lsda;
+ _Unwind_Ptr landingPad;
+ int handler;
+
+ // Shortcut for phase 2 found handler for domestic exception.
+ if (actions == (_UA_CLEANUP_PHASE | _UA_HANDLER_FRAME)
+ && isGdcExceptionClass(exceptionClass))
+ {
+ ExceptionHeader.restore(unwindHeader, handler, lsda, landingPad);
+ // Shouldn't have cached a null landing pad in phase 1.
+ if (landingPad == 0)
+ terminate(__LINE__);
+ }
+ else
+ {
+ lsda = cast(ubyte*)_Unwind_GetLanguageSpecificData(context);
+
+ auto result = scanLSDA(lsda, exceptionClass, actions, unwindHeader,
+ context, landingPad, handler);
+
+ // Positive on handler found in phase 1, continue unwinding, or failure.
+ if (result)
+ return result;
+ }
+
+ // Unexpected negative handler, call terminate directly.
+ if (handler < 0)
+ terminate(__LINE__);
+
+ // We can't use any of the deh routines with foreign exceptions,
+ // because they all expect unwindHeader to be an ExceptionHeader.
+ if (isGdcExceptionClass(exceptionClass))
+ {
+ // If there are any in-flight exceptions being thrown, chain our
+ // current object onto the end of the prevous object.
+ ExceptionHeader* eh = ExceptionHeader.toExceptionHeader(unwindHeader);
+ auto currentLsd = lsda;
+ bool bypassed = false;
+
+ while (eh.next)
+ {
+ ExceptionHeader* ehn = eh.next;
+ const(ubyte)* nextLsd;
+ _Unwind_Ptr nextLandingPad;
+ int nextHandler;
+
+ ExceptionHeader.restore(&ehn.unwindHeader, nextHandler, nextLsd, nextLandingPad);
+
+ Error e = cast(Error)eh.object;
+ if (e !is null && !cast(Error)ehn.object)
+ {
+ // We found an Error, bypass the exception chain.
+ currentLsd = nextLsd;
+ eh = ehn;
+ bypassed = true;
+ continue;
+ }
+
+ // Don't combine when the exceptions are from different functions.
+ if (currentLsd != nextLsd)
+ break;
+
+ // Add our object onto the end of the existing chain.
+ Throwable n = ehn.object;
+ while (n.next)
+ n = n.next;
+ n.next = eh.object;
+
+ // Replace our exception object with in-flight one
+ eh.object = ehn.object;
+ if (nextHandler != handler && !bypassed)
+ {
+ handler = nextHandler;
+ ExceptionHeader.save(unwindHeader, context, handler,
+ lsda, landingPad);
+ }
+
+ // Exceptions chained, can now throw away the previous header.
+ eh.next = ehn.next;
+ _Unwind_DeleteException(&ehn.unwindHeader);
+ }
+
+ if (bypassed)
+ {
+ eh = ExceptionHeader.toExceptionHeader(unwindHeader);
+ Error e = cast(Error)eh.object;
+ auto ehn = eh.next;
+ e.bypassedException = ehn.object;
+ eh.next = ehn.next;
+ _Unwind_DeleteException(&ehn.unwindHeader);
+ }
+ }
+
+ // Set up registers and jump to cleanup or handler.
+ // For targets with pointers smaller than the word size, we must extend the
+ // pointer, and this extension is target dependent.
+ _Unwind_SetGR(context, __builtin_eh_return_data_regno(0),
+ cast(_Unwind_Ptr)unwindHeader);
+ _Unwind_SetGR(context, __builtin_eh_return_data_regno(1), handler);
+ _Unwind_SetIP(context, landingPad);
+
+ return _URC_INSTALL_CONTEXT;
+}
diff --git a/libphobos/libdruntime/gcc/libbacktrace.d.in b/libphobos/libdruntime/gcc/libbacktrace.d.in
new file mode 100644
index 00000000000..5bb01374731
--- /dev/null
+++ b/libphobos/libdruntime/gcc/libbacktrace.d.in
@@ -0,0 +1,91 @@
+// GNU D Compiler bindings for the stack backtrace functions.
+// Copyright (C) 2013-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+module gcc.libbacktrace;
+
+/*
+ * This is not part of libbacktrace, it's used for the temporary gdc fallback
+ * implementation. To avoid adding another autoconf module it's defined here
+ */
+
+enum HAVE_DLADDR = @HAVE_DLADDR@;
+static if (HAVE_DLADDR)
+{
+ extern(C):
+ int dladdr(void *addr, Dl_info *info);
+ struct Dl_info
+ {
+ const (char*) dli_fname;
+ void* dli_fbase;
+ const (char*) dli_sname;
+ void* dli_saddr;
+ }
+}
+
+/*
+ * Part of backtrace-supported.h: These are platform specific variables.
+ * They are obtained via the configure script
+ */
+
+enum BACKTRACE_SUPPORTED = @BACKTRACE_SUPPORTED@;
+enum BACKTRACE_USES_MALLOC = @BACKTRACE_USES_MALLOC@;
+enum BACKTRACE_SUPPORTS_THREADS = @BACKTRACE_SUPPORTS_THREADS@;
+
+/*
+ * libbacktrace.h
+ */
+
+static if(BACKTRACE_SUPPORTED)
+{
+ import core.stdc.stddef, core.stdc.stdio, core.stdc.stdint;
+
+ extern(C):
+ struct backtrace_state {}
+
+ alias extern(C) void function(void* data,
+ const(char)* msg, int errnum) backtrace_error_callback;
+
+ backtrace_state* backtrace_create_state( const(char)* filename, int threaded,
+ backtrace_error_callback error_callback, void* data) nothrow;
+
+ alias extern(C) int function(void* data, uintptr_t pc,
+ const(char)* filename, int lineno, const(char)* func) backtrace_full_callback;
+
+ int backtrace_full(backtrace_state* state, int skip, backtrace_full_callback callback,
+ backtrace_error_callback error_callback, void* data) nothrow;
+
+ alias extern(C) int function(void* data, uintptr_t pc) backtrace_simple_callback;
+
+ int backtrace_simple(backtrace_state* state, int skip, backtrace_simple_callback callback,
+ backtrace_error_callback error_callback, void* data) nothrow;
+
+ void backtrace_print(backtrace_state* state, int skip, FILE* file) nothrow;
+
+ int backtrace_pcinfo(backtrace_state* state, uintptr_t pc, backtrace_full_callback callback,
+ backtrace_error_callback error_callback, void* data) nothrow;
+
+ alias extern(C) void function(void* data, uintptr_t pc,
+ const(char)* symname, uintptr_t symval) backtrace_syminfo_callback;
+
+ int backtrace_syminfo(backtrace_state *state, uintptr_t pc, backtrace_syminfo_callback callback,
+ backtrace_error_callback error_callback, void* data) nothrow;
+}
diff --git a/libphobos/libdruntime/gcc/unwind/arm.d b/libphobos/libdruntime/gcc/unwind/arm.d
new file mode 100644
index 00000000000..34b845a5cbc
--- /dev/null
+++ b/libphobos/libdruntime/gcc/unwind/arm.d
@@ -0,0 +1,71 @@
+// Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// extern(C) interface for the ARM EABI unwinder library.
+// This corresponds to unwind-arm.h
+
+module gcc.unwind.arm;
+
+import gcc.config;
+
+version(ARM):
+static if (GNU_ARM_EABI_Unwinder):
+
+public import gcc.unwind.arm_common;
+import gcc.unwind.pe;
+
+extern (C):
+@nogc:
+
+enum int UNWIND_STACK_REG = 13;
+// Use IP as a scratch register within the personality routine.
+enum int UNWIND_POINTER_REG = 12;
+
+version (linux)
+ enum _TTYPE_ENCODING = (DW_EH_PE_pcrel | DW_EH_PE_indirect);
+else version (NetBSD)
+ enum _TTYPE_ENCODING = (DW_EH_PE_pcrel | DW_EH_PE_indirect);
+else version (FreeBSD)
+ enum _TTYPE_ENCODING = (DW_EH_PE_pcrel | DW_EH_PE_indirect);
+else version (Symbian)
+ enum _TTYPE_ENCODING = (DW_EH_PE_absptr);
+else version (uClinux)
+ enum _TTYPE_ENCODING = (DW_EH_PE_absptr);
+else
+ enum _TTYPE_ENCODING = (DW_EH_PE_pcrel);
+
+// Return the address of the instruction, not the actual IP value.
+_Unwind_Word _Unwind_GetIP(_Unwind_Context* context)
+{
+ return _Unwind_GetGR(context, 15) & ~ cast(_Unwind_Word) 1;
+}
+
+void _Unwind_SetIP(_Unwind_Context* context, _Unwind_Word val)
+{
+ return _Unwind_SetGR(context, 15, val | (_Unwind_GetGR(context, 15) & 1));
+}
+
+_Unwind_Word _Unwind_GetIPInfo(_Unwind_Context* context, int* ip_before_insn)
+{
+ *ip_before_insn = 0;
+ return _Unwind_GetIP(context);
+}
diff --git a/libphobos/libdruntime/gcc/unwind/arm_common.d b/libphobos/libdruntime/gcc/unwind/arm_common.d
new file mode 100644
index 00000000000..9adc0f33f27
--- /dev/null
+++ b/libphobos/libdruntime/gcc/unwind/arm_common.d
@@ -0,0 +1,244 @@
+// Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// extern(C) interface for the ARM EABI and C6X unwinders.
+// This corresponds to unwind-arm-common.h
+
+module gcc.unwind.arm_common;
+
+import gcc.config;
+
+static if (GNU_ARM_EABI_Unwinder):
+
+import gcc.builtins;
+
+extern (C):
+
+// Placed outside @nogc in order to not constrain what the callback does.
+// ??? Does this really need to be extern(C) alias?
+extern(C) alias _Unwind_Exception_Cleanup_Fn
+ = void function(_Unwind_Reason_Code, _Unwind_Exception*);
+
+extern(C) alias personality_routine
+ = _Unwind_Reason_Code function(_Unwind_State,
+ _Unwind_Control_Block*,
+ _Unwind_Context*);
+
+extern(C) alias _Unwind_Stop_Fn
+ =_Unwind_Reason_Code function(int, _Unwind_Action,
+ _Unwind_Exception_Class,
+ _Unwind_Control_Block*,
+ _Unwind_Context*, void*);
+
+extern(C) alias _Unwind_Trace_Fn
+ = _Unwind_Reason_Code function(_Unwind_Context*, void*);
+
+@nogc:
+
+alias _Unwind_Word = __builtin_machine_uint;
+alias _Unwind_Sword = __builtin_machine_int;
+alias _Unwind_Ptr = __builtin_pointer_uint;
+alias _Unwind_Internal_Ptr =__builtin_pointer_uint;
+alias _uw = _Unwind_Word;
+alias _uw64 = ulong;
+alias _uw16 = ushort;
+alias _uw8 = ubyte;
+
+alias _Unwind_Reason_Code = uint;
+enum : _Unwind_Reason_Code
+{
+ _URC_OK = 0, // operation completed successfully
+ _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+ _URC_END_OF_STACK = 5,
+ _URC_HANDLER_FOUND = 6,
+ _URC_INSTALL_CONTEXT = 7,
+ _URC_CONTINUE_UNWIND = 8,
+ _URC_FAILURE = 9 // unspecified failure of some kind
+}
+
+alias _Unwind_State = int;
+enum : _Unwind_State
+{
+ _US_VIRTUAL_UNWIND_FRAME = 0,
+ _US_UNWIND_FRAME_STARTING = 1,
+ _US_UNWIND_FRAME_RESUME = 2,
+ _US_ACTION_MASK = 3,
+ _US_FORCE_UNWIND = 8,
+ _US_END_OF_STACK = 16
+}
+
+// Provided only for for compatibility with existing code.
+alias _Unwind_Action = int;
+enum : _Unwind_Action
+{
+ _UA_SEARCH_PHASE = 1,
+ _UA_CLEANUP_PHASE = 2,
+ _UA_HANDLER_FRAME = 4,
+ _UA_FORCE_UNWIND = 8,
+ _UA_END_OF_STACK = 16,
+ _URC_NO_REASON = _URC_OK
+}
+
+struct _Unwind_Context;
+alias _Unwind_EHT_Header = _uw;
+
+struct _Unwind_Control_Block
+{
+ _Unwind_Exception_Class exception_class = '\0';
+ _Unwind_Exception_Cleanup_Fn exception_cleanup;
+ // Unwinder cache, private fields for the unwinder's use
+ struct _unwinder_cache
+ {
+ _uw reserved1; // Forced unwind stop fn, 0 if not forced
+ _uw reserved2; // Personality routine address
+ _uw reserved3; // Saved callsite address
+ _uw reserved4; // Forced unwind stop arg
+ _uw reserved5;
+ }
+ _unwinder_cache unwinder_cache;
+ // Propagation barrier cache (valid after phase 1):
+ struct _barrier_cache
+ {
+ _uw sp;
+ _uw[5] bitpattern;
+ }
+ _barrier_cache barrier_cache;
+ // Cleanup cache (preserved over cleanup):
+ struct _cleanup_cache
+ {
+ _uw[4] bitpattern;
+ }
+ _cleanup_cache cleanup_cache;
+ // Pr cache (for pr's benefit):
+ struct _pr_cache
+ {
+ _uw fnstart; // function start address */
+ _Unwind_EHT_Header* ehtp; // pointer to EHT entry header word
+ _uw additional; // additional data
+ _uw reserved1;
+ }
+ _pr_cache pr_cache;
+ long[0] _force_alignment; // Force alignment to 8-byte boundary
+}
+
+// Virtual Register Set
+alias _Unwind_VRS_RegClass = int;
+enum : _Unwind_VRS_RegClass
+{
+ _UVRSC_CORE = 0, // integer register
+ _UVRSC_VFP = 1, // vfp
+ _UVRSC_FPA = 2, // fpa
+ _UVRSC_WMMXD = 3, // Intel WMMX data register
+ _UVRSC_WMMXC = 4 // Intel WMMX control register
+}
+
+alias _Unwind_VRS_DataRepresentation = int;
+enum : _Unwind_VRS_DataRepresentation
+{
+ _UVRSD_UINT32 = 0,
+ _UVRSD_VFPX = 1,
+ _UVRSD_FPAX = 2,
+ _UVRSD_UINT64 = 3,
+ _UVRSD_FLOAT = 4,
+ _UVRSD_DOUBLE = 5
+}
+
+alias _Unwind_VRS_Result = int;
+enum : _Unwind_VRS_Result
+{
+ _UVRSR_OK = 0,
+ _UVRSR_NOT_IMPLEMENTED = 1,
+ _UVRSR_FAILED = 2
+}
+
+// Frame unwinding state.
+struct __gnu_unwind_state
+{
+ _uw data; // The current word (bytes packed msb first).
+ _uw* next; // Pointer to the next word of data.
+ _uw8 bytes_left; // The number of bytes left in this word.
+ _uw8 words_left; // The number of words pointed to by ptr.
+}
+
+_Unwind_VRS_Result _Unwind_VRS_Set(_Unwind_Context*, _Unwind_VRS_RegClass,
+ _uw, _Unwind_VRS_DataRepresentation,
+ void*);
+
+_Unwind_VRS_Result _Unwind_VRS_Get(_Unwind_Context*, _Unwind_VRS_RegClass,
+ _uw, _Unwind_VRS_DataRepresentation,
+ void*);
+
+_Unwind_VRS_Result _Unwind_VRS_Pop(_Unwind_Context*, _Unwind_VRS_RegClass,
+ _uw, _Unwind_VRS_DataRepresentation);
+
+
+// Support functions for the PR.
+alias _Unwind_Exception = _Unwind_Control_Block;
+alias _Unwind_Exception_Class = char[8];
+
+void* _Unwind_GetLanguageSpecificData(_Unwind_Context*);
+_Unwind_Ptr _Unwind_GetRegionStart(_Unwind_Context*);
+
+_Unwind_Ptr _Unwind_GetDataRelBase(_Unwind_Context*);
+// This should never be used.
+_Unwind_Ptr _Unwind_GetTextRelBase(_Unwind_Context*);
+
+// Interface functions:
+_Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Control_Block*);
+void _Unwind_Resume(_Unwind_Control_Block*);
+_Unwind_Reason_Code _Unwind_Resume_or_Rethrow(_Unwind_Control_Block*);
+
+_Unwind_Reason_Code _Unwind_ForcedUnwind(_Unwind_Control_Block*,
+ _Unwind_Stop_Fn, void*);
+
+// @@@ Use unwind data to perform a stack backtrace. The trace callback
+// is called for every stack frame in the call chain, but no cleanup
+// actions are performed.
+_Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void*);
+
+_Unwind_Word _Unwind_GetCFA(_Unwind_Context*);
+void _Unwind_Complete(_Unwind_Control_Block*);
+void _Unwind_DeleteException(_Unwind_Exception*);
+
+_Unwind_Reason_Code __gnu_unwind_frame(_Unwind_Control_Block*,
+ _Unwind_Context*);
+_Unwind_Reason_Code __gnu_unwind_execute(_Unwind_Context*,
+ __gnu_unwind_state*);
+
+_Unwind_Word _Unwind_GetGR(_Unwind_Context* context, int regno)
+{
+ _uw val;
+ _Unwind_VRS_Get(context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
+ return val;
+}
+
+void _Unwind_SetGR(_Unwind_Context* context, int regno, _Unwind_Word val)
+{
+ _Unwind_VRS_Set(context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
+}
+
+// leb128 type numbers have a potentially unlimited size.
+// The target of the following definitions of _sleb128_t and _uleb128_t
+// is to have efficient data types large enough to hold the leb128 type
+// numbers used in the unwind code.
+alias _sleb128_t = __builtin_clong;
+alias _uleb128_t = __builtin_culong;
diff --git a/libphobos/libdruntime/gcc/unwind/c6x.d b/libphobos/libdruntime/gcc/unwind/c6x.d
new file mode 100644
index 00000000000..490bcb2f78c
--- /dev/null
+++ b/libphobos/libdruntime/gcc/unwind/c6x.d
@@ -0,0 +1,52 @@
+// Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT 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
+// along with GCC; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// extern(C) interface for the C6X EABI unwinder library.
+// This corresponds to unwind-c6x.h
+
+module gcc.unwind.c6x;
+
+import gcc.config;
+
+version (TIC6X):
+static if (GNU_ARM_EABI_Unwinder):
+
+// Not really the ARM EABI, but pretty close.
+public import gcc.unwind.arm_common;
+
+extern (C):
+@nogc:
+
+enum int UNWIND_STACK_REG = 31;
+// Use A0 as a scratch register within the personality routine.
+enum int UNWIND_POINTER_REG = 0;
+
+_Unwind_Word _Unwind_GetIP(_Unwind_Context* context)
+{
+ return _Unwind_GetGR(context, 33);
+}
+
+void _Unwind_SetIP(_Unwind_Context* context, _Unwind_Word val)
+{
+ return _Unwind_SetGR(context, 33, val);
+}
+
+_Unwind_Word _Unwind_GetIPInfo(_Unwind_Context* context, int* ip_before_insn)
+{
+ *ip_before_insn = 0;
+ return _Unwind_GetIP(context);
+}
diff --git a/libphobos/libdruntime/gcc/unwind/generic.d b/libphobos/libdruntime/gcc/unwind/generic.d
new file mode 100644
index 00000000000..2d8549414bb
--- /dev/null
+++ b/libphobos/libdruntime/gcc/unwind/generic.d
@@ -0,0 +1,274 @@
+// Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// extern(C) interface for the generic unwinder library.
+// This corresponds to unwind-generic.h
+
+module gcc.unwind.generic;
+
+import gcc.config;
+
+static if (!GNU_ARM_EABI_Unwinder):
+
+import gcc.builtins;
+
+// This is derived from the C++ ABI for IA-64. Where we diverge
+// for cross-architecture compatibility are noted with "@@@".
+
+extern (C):
+
+// Placed outside @nogc in order to not constrain what the callback does.
+// ??? Does this really need to be extern(C) alias?
+
+extern(C) alias _Unwind_Exception_Cleanup_Fn
+ = void function(_Unwind_Reason_Code, _Unwind_Exception*);
+
+extern(C) alias _Unwind_Stop_Fn
+ = _Unwind_Reason_Code function(int, _Unwind_Action,
+ _Unwind_Exception_Class,
+ _Unwind_Exception*,
+ _Unwind_Context*, void*);
+
+extern(C) alias _Unwind_Trace_Fn
+ = _Unwind_Reason_Code function(_Unwind_Context*, void*);
+
+// The personality routine is the function in the C++ (or other language)
+// runtime library which serves as an interface between the system unwind
+// library and language-specific exception handling semantics. It is
+// specific to the code fragment described by an unwind info block, and
+// it is always referenced via the pointer in the unwind info block, and
+// hence it has no ABI-specified name.
+
+// Note that this implies that two different C++ implementations can
+// use different names, and have different contents in the language
+// specific data area. Moreover, that the language specific data
+// area contains no version info because name of the function invoked
+// provides more effective versioning by detecting at link time the
+// lack of code to handle the different data format.
+
+extern(C) alias _Unwind_Personality_Fn
+ = _Unwind_Reason_Code function(int, _Unwind_Action,
+ _Unwind_Exception_Class,
+ _Unwind_Exception*,
+ _Unwind_Context*);
+
+@nogc:
+
+// Level 1: Base ABI
+
+// @@@ The IA-64 ABI uses uint64 throughout.
+// Most places this is inefficient for 32-bit and smaller machines.
+alias _Unwind_Word = __builtin_unwind_uint;
+alias _Unwind_Sword = __builtin_unwind_int;
+version (IA64)
+{
+ version (HPUX)
+ alias _Unwind_Ptr = __builtin_machine_uint;
+ else
+ alias _Unwind_Ptr = __builtin_pointer_uint;
+}
+else
+{
+ alias _Unwind_Ptr = __builtin_pointer_uint;
+}
+alias _Unwind_Internal_Ptr = __builtin_pointer_uint;
+
+// @@@ The IA-64 ABI uses a 64-bit word to identify the producer and
+// consumer of an exception. We'll go along with this for now even on
+// 32-bit machines. We'll need to provide some other option for
+// 16-bit machines and for machines with > 8 bits per byte.
+alias _Unwind_Exception_Class = ulong;
+
+// The unwind interface uses reason codes in several contexts to
+// identify the reasons for failures or other actions.
+alias _Unwind_Reason_Code = uint;
+enum : _Unwind_Reason_Code
+{
+ _URC_NO_REASON = 0,
+ _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+ _URC_FATAL_PHASE2_ERROR = 2,
+ _URC_FATAL_PHASE1_ERROR = 3,
+ _URC_NORMAL_STOP = 4,
+ _URC_END_OF_STACK = 5,
+ _URC_HANDLER_FOUND = 6,
+ _URC_INSTALL_CONTEXT = 7,
+ _URC_CONTINUE_UNWIND = 8
+}
+
+// The unwind interface uses a pointer to an exception header object
+// as its representation of an exception being thrown. In general, the
+// full representation of an exception object is language- and
+// implementation-specific, but it will be prefixed by a header
+// understood by the unwind interface.
+
+// @@@ The IA-64 ABI says that this structure must be double-word aligned.
+// Taking that literally does not make much sense generically. Instead we
+// provide the maximum alignment required by any type for the machine.
+struct _Unwind_Exception
+{
+ _Unwind_Exception_Class exception_class;
+ _Unwind_Exception_Cleanup_Fn exception_cleanup;
+ _Unwind_Word private_1;
+ _Unwind_Word private_2;
+}
+
+// The ACTIONS argument to the personality routine is a bitwise OR of one
+// or more of the following constants.
+alias _Unwind_Action = int;
+enum : _Unwind_Action
+{
+ _UA_SEARCH_PHASE = 1,
+ _UA_CLEANUP_PHASE = 2,
+ _UA_HANDLER_FRAME = 4,
+ _UA_FORCE_UNWIND = 8,
+ _UA_END_OF_STACK = 16
+}
+
+// This is an opaque type used to refer to a system-specific data
+// structure used by the system unwinder. This context is created and
+// destroyed by the system, and passed to the personality routine
+// during unwinding.
+struct _Unwind_Context;
+
+// Raise an exception, passing along the given exception object.
+_Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Exception*);
+
+// Raise an exception for forced unwinding.
+_Unwind_Reason_Code _Unwind_ForcedUnwind(_Unwind_Exception*, _Unwind_Stop_Fn, void*);
+
+// Helper to invoke the exception_cleanup routine.
+void _Unwind_DeleteException(_Unwind_Exception*);
+
+// Resume propagation of an existing exception. This is used after
+// e.g. executing cleanup code, and not to implement rethrowing.
+void _Unwind_Resume(_Unwind_Exception*);
+
+// @@@ Resume propagation of an FORCE_UNWIND exception, or to rethrow
+// a normal exception that was handled.
+_Unwind_Reason_Code _Unwind_Resume_or_Rethrow(_Unwind_Exception*);
+
+// @@@ Use unwind data to perform a stack backtrace. The trace callback
+// is called for every stack frame in the call chain, but no cleanup
+// actions are performed.
+_Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void*);
+
+// These functions are used for communicating information about the unwind
+// context (i.e. the unwind descriptors and the user register state) between
+// the unwind library and the personality routine and landing pad. Only
+// selected registers may be manipulated.
+
+_Unwind_Word _Unwind_GetGR(_Unwind_Context*, int);
+void _Unwind_SetGR(_Unwind_Context*, int, _Unwind_Word);
+
+_Unwind_Ptr _Unwind_GetIP(_Unwind_Context*);
+_Unwind_Ptr _Unwind_GetIPInfo(_Unwind_Context*, int*);
+void _Unwind_SetIP(_Unwind_Context*, _Unwind_Ptr);
+
+// @@@ Retrieve the CFA of the given context.
+_Unwind_Word _Unwind_GetCFA(_Unwind_Context*);
+
+void* _Unwind_GetLanguageSpecificData(_Unwind_Context*);
+
+_Unwind_Ptr _Unwind_GetRegionStart(_Unwind_Context*);
+
+
+// @@@ The following alternate entry points are for setjmp/longjmp
+// based unwinding.
+
+struct SjLj_Function_Context;
+extern void _Unwind_SjLj_Register(SjLj_Function_Context*);
+extern void _Unwind_SjLj_Unregister(SjLj_Function_Context*);
+
+_Unwind_Reason_Code _Unwind_SjLj_RaiseException(_Unwind_Exception*);
+_Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind(_Unwind_Exception*, _Unwind_Stop_Fn, void*);
+void _Unwind_SjLj_Resume(_Unwind_Exception*);
+_Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow(_Unwind_Exception*);
+
+// @@@ The following provide access to the base addresses for text
+// and data-relative addressing in the LDSA. In order to stay link
+// compatible with the standard ABI for IA-64, we inline these.
+
+version (IA64)
+{
+ _Unwind_Ptr _Unwind_GetDataRelBase(_Unwind_Context* _C)
+ {
+ // The GP is stored in R1.
+ return _Unwind_GetGR(_C, 1);
+ }
+
+ _Unwind_Ptr _Unwind_GetTextRelBase(_Unwind_Context*)
+ {
+ __builtin_abort();
+ return 0;
+ }
+
+ // @@@ Retrieve the Backing Store Pointer of the given context.
+ _Unwind_Word _Unwind_GetBSP(_Unwind_Context*);
+}
+else
+{
+ _Unwind_Ptr _Unwind_GetDataRelBase(_Unwind_Context*);
+ _Unwind_Ptr _Unwind_GetTextRelBase(_Unwind_Context*);
+}
+
+// @@@ Given an address, return the entry point of the function that
+// contains it.
+extern void* _Unwind_FindEnclosingFunction(void* pc);
+
+
+// leb128 type numbers have a potentially unlimited size.
+// The target of the following definitions of _sleb128_t and _uleb128_t
+// is to have efficient data types large enough to hold the leb128 type
+// numbers used in the unwind code.
+// Mostly these types will simply be defined to long and unsigned long
+// except when a unsigned long data type on the target machine is not
+// capable of storing a pointer.
+
+static if (__builtin_clong.sizeof >= (void*).sizeof)
+{
+ alias _sleb128_t = __builtin_clong;
+ alias _uleb128_t = __builtin_culong;
+}
+else static if (long.sizeof >= (void*).sizeof)
+{
+ alias _sleb128_t = long;
+ alias _uleb128_t = ulong;
+}
+else
+{
+ static assert(false, "What type shall we use for _sleb128_t?");
+}
+
+version (GNU_SEH_Exceptions)
+{
+ // We're lazy, exact definition in MinGW/winnt.h
+ enum EXCEPTION_DISPOSITION
+ {
+ ExceptionContinueExecution,
+ ExceptionContinueSearch,
+ ExceptionNestedException,
+ ExceptionCollidedUnwind
+ }
+
+ extern(C) EXCEPTION_DISPOSITION _GCC_specific_handler(void*, void*, void*,
+ _Unwind_Personality_Fn);
+}
diff --git a/libphobos/libdruntime/gcc/unwind/package.d b/libphobos/libdruntime/gcc/unwind/package.d
new file mode 100644
index 00000000000..2b9107c3624
--- /dev/null
+++ b/libphobos/libdruntime/gcc/unwind/package.d
@@ -0,0 +1,37 @@
+// Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+module gcc.unwind;
+
+import gcc.config;
+
+static if (GNU_ARM_EABI_Unwinder)
+{
+ version (ARM)
+ public import gcc.unwind.arm;
+ else version (TIC6X)
+ public import gcc.unwind.c6x;
+ else
+ static assert(false, "Unsupported target for ARM_EABI_UNWINDER");
+}
+else
+ public import gcc.unwind.generic;
diff --git a/libphobos/libdruntime/gcc/unwind/pe.d b/libphobos/libdruntime/gcc/unwind/pe.d
new file mode 100644
index 00000000000..a26c447c59a
--- /dev/null
+++ b/libphobos/libdruntime/gcc/unwind/pe.d
@@ -0,0 +1,238 @@
+// Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// extern(C) interface for the GNU/GCC pointer encoding library.
+// This corresponds to unwind-pe.h
+
+module gcc.unwind.pe;
+
+import gcc.unwind;
+import gcc.builtins;
+
+@nogc:
+
+// Pointer encodings, from dwarf2.h.
+enum
+{
+ DW_EH_PE_absptr = 0x00,
+ DW_EH_PE_omit = 0xff,
+
+ DW_EH_PE_uleb128 = 0x01,
+ DW_EH_PE_udata2 = 0x02,
+ DW_EH_PE_udata4 = 0x03,
+ DW_EH_PE_udata8 = 0x04,
+ DW_EH_PE_sleb128 = 0x09,
+ DW_EH_PE_sdata2 = 0x0A,
+ DW_EH_PE_sdata4 = 0x0B,
+ DW_EH_PE_sdata8 = 0x0C,
+ DW_EH_PE_signed = 0x08,
+
+ DW_EH_PE_pcrel = 0x10,
+ DW_EH_PE_textrel = 0x20,
+ DW_EH_PE_datarel = 0x30,
+ DW_EH_PE_funcrel = 0x40,
+ DW_EH_PE_aligned = 0x50,
+
+ DW_EH_PE_indirect = 0x80
+}
+
+// Given an encoding, return the number of bytes the format occupies.
+// This is only defined for fixed-size encodings, and so does not
+// include leb128.
+uint size_of_encoded_value(ubyte encoding)
+{
+ if (encoding == DW_EH_PE_omit)
+ return 0;
+
+ final switch (encoding & 0x07)
+ {
+ case DW_EH_PE_absptr:
+ return (void*).sizeof;
+ case DW_EH_PE_udata2:
+ return 2;
+ case DW_EH_PE_udata4:
+ return 4;
+ case DW_EH_PE_udata8:
+ return 8;
+ }
+ assert(0);
+}
+
+// Given an encoding and an _Unwind_Context, return the base to which
+// the encoding is relative. This base may then be passed to
+// read_encoded_value_with_base for use when the _Unwind_Context is
+// not available.
+_Unwind_Ptr base_of_encoded_value(ubyte encoding, _Unwind_Context* context)
+{
+ if (encoding == DW_EH_PE_omit)
+ return cast(_Unwind_Ptr) 0;
+
+ final switch (encoding & 0x70)
+ {
+ case DW_EH_PE_absptr:
+ case DW_EH_PE_pcrel:
+ case DW_EH_PE_aligned:
+ return cast(_Unwind_Ptr) 0;
+
+ case DW_EH_PE_textrel:
+ return _Unwind_GetTextRelBase(context);
+ case DW_EH_PE_datarel:
+ return _Unwind_GetDataRelBase(context);
+ case DW_EH_PE_funcrel:
+ return _Unwind_GetRegionStart(context);
+ }
+ assert(0);
+}
+
+// Read an unsigned leb128 value from P, *P is incremented past the value.
+// We assume that a word is large enough to hold any value so encoded;
+// if it is smaller than a pointer on some target, pointers should not be
+// leb128 encoded on that target.
+_uleb128_t read_uleb128(const(ubyte)** p)
+{
+ auto q = *p;
+ _uleb128_t result = 0;
+ uint shift = 0;
+
+ while (1)
+ {
+ ubyte b = *q++;
+ result |= cast(_uleb128_t)(b & 0x7F) << shift;
+ if ((b & 0x80) == 0)
+ break;
+ shift += 7;
+ }
+
+ *p = q;
+ return result;
+}
+
+// Similar, but read a signed leb128 value.
+_sleb128_t read_sleb128(const(ubyte)** p)
+{
+ auto q = *p;
+ _sleb128_t result = 0;
+ uint shift = 0;
+ ubyte b = void;
+
+ while (1)
+ {
+ b = *q++;
+ result |= cast(_sleb128_t)(b & 0x7F) << shift;
+ shift += 7;
+ if ((b & 0x80) == 0)
+ break;
+ }
+
+ // Sign-extend a negative value.
+ if (shift < result.sizeof * 8 && (b & 0x40))
+ result |= -(cast(_sleb128_t)1 << shift);
+
+ *p = q;
+ return result;
+}
+
+// Load an encoded value from memory at P. The value is returned in VAL;
+// The function returns P incremented past the value. BASE is as given
+// by base_of_encoded_value for this encoding in the appropriate context.
+_Unwind_Ptr read_encoded_value_with_base(ubyte encoding, _Unwind_Ptr base,
+ const(ubyte)** p)
+{
+ auto q = *p;
+ _Unwind_Internal_Ptr result;
+
+ if (encoding == DW_EH_PE_aligned)
+ {
+ _Unwind_Internal_Ptr a = cast(_Unwind_Internal_Ptr)q;
+ a = cast(_Unwind_Internal_Ptr)((a + (void*).sizeof - 1) & - (void*).sizeof);
+ result = *cast(_Unwind_Internal_Ptr*)a;
+ q = cast(ubyte*) cast(_Unwind_Internal_Ptr)(a + (void*).sizeof);
+ }
+ else
+ {
+ switch (encoding & 0x0f)
+ {
+ case DW_EH_PE_uleb128:
+ result = cast(_Unwind_Internal_Ptr)read_uleb128(&q);
+ break;
+
+ case DW_EH_PE_sleb128:
+ result = cast(_Unwind_Internal_Ptr)read_sleb128(&q);
+ break;
+
+ case DW_EH_PE_udata2:
+ result = cast(_Unwind_Internal_Ptr) *cast(ushort*)q;
+ q += 2;
+ break;
+ case DW_EH_PE_udata4:
+ result = cast(_Unwind_Internal_Ptr) *cast(uint*)q;
+ q += 4;
+ break;
+ case DW_EH_PE_udata8:
+ result = cast(_Unwind_Internal_Ptr) *cast(ulong*)q;
+ q += 8;
+ break;
+
+ case DW_EH_PE_sdata2:
+ result = cast(_Unwind_Internal_Ptr) *cast(short*)q;
+ q += 2;
+ break;
+ case DW_EH_PE_sdata4:
+ result = cast(_Unwind_Internal_Ptr) *cast(int*)q;
+ q += 4;
+ break;
+ case DW_EH_PE_sdata8:
+ result = cast(_Unwind_Internal_Ptr) *cast(long*)q;
+ q += 8;
+ break;
+
+ case DW_EH_PE_absptr:
+ if (size_t.sizeof == 8)
+ goto case DW_EH_PE_udata8;
+ else
+ goto case DW_EH_PE_udata4;
+
+ default:
+ __builtin_abort();
+ }
+
+ if (result != 0)
+ {
+ result += ((encoding & 0x70) == DW_EH_PE_pcrel
+ ? cast(_Unwind_Internal_Ptr)*p : base);
+ if (encoding & DW_EH_PE_indirect)
+ result = *cast(_Unwind_Internal_Ptr*)result;
+ }
+ }
+
+ *p = q;
+ return result;
+}
+
+// Like read_encoded_value_with_base, but get the base from the context
+// rather than providing it directly.
+_Unwind_Ptr read_encoded_value(_Unwind_Context* context, ubyte encoding,
+ const(ubyte)** p)
+{
+ auto base = base_of_encoded_value(encoding, context);
+ return read_encoded_value_with_base(encoding, base, p);
+}
diff --git a/libphobos/src/libgphobos.spec.in b/libphobos/src/libgphobos.spec.in
new file mode 100644
index 00000000000..a11ec3ea192
--- /dev/null
+++ b/libphobos/src/libgphobos.spec.in
@@ -0,0 +1,8 @@
+#
+# This spec file is read by gdc when linking.
+# It is used to specify the libraries we need to link in, in the right
+# order.
+#
+
+%rename lib liborig_gdc_renamed
+*lib: %(liborig_gdc_renamed) @SPEC_PHOBOS_DEPS@