msys2-runtime: more backports

See https://github.com/msys2/msys2-runtime/issues/272

msys2-runtime/PKGBUILD

@@ -4,7 +4,7 @@
 pkgbase=msys2-runtime
 pkgname=('msys2-runtime' 'msys2-runtime-devel')
 pkgver=3.6.0
-pkgrel=3
+pkgrel=4
 pkgdesc="Cygwin POSIX emulation engine"
 arch=('x86_64')
 url="https://www.cygwin.com/"
@@ -30,6 +30,7 @@ makedepends=('cocom'
 options=('!zipman')
 source=('msys2-runtime'::git://sourceware.org/git/newlib-cygwin.git#tag=cygwin-${pkgver}
         https://patch-diff.githubusercontent.com/raw/msys2/msys2-runtime/pull/271.patch
+        signal-crash-backport.patch
         msys2-runtime.commit
         0001-Add-MSYS2-triplet.patch
         0002-Fix-msys-library-name-in-import-libraries.patch
@@ -74,6 +75,7 @@ source=('msys2-runtime'::git://sourceware.org/git/newlib-cygwin.git#tag=cygwin-$
         0041-Cygwin-console-tty-restore-really-restores-the-previ.patch)
 sha256sums=('89d856fbf9f8d753a644651f95ccd769a43135d93b1bc322582f6fb87ebf4cea'
             '875c09c99cfa98b7480e7ec37ee211315f3f60b59c14a70760a4f8e2b9cc3c17'
+            '4931b8afe369c1e7a97639e75cf8342c60103e07699ed2acf0c910bf014ae352'
             '564998f09ca51148aba183e52ac8e78169c98d3e1a92e163f56a00cd7c840a68'
             '5945b95c6b3caf18cc8356802e9af1770746a76c27d0931b897d48d072603fcf'
             '8f2def0add5397487e2470fd7219bd80233e4d43e9f78d92d042907fede0570a'
@@ -156,6 +158,10 @@ prepare() {
 
   apply_git_am_with_msg 271.patch
 
+  # https://cygwin.com/git/?p=newlib-cygwin.git;a=commit;h=d71aeccff4d219b1cc7a6b0d17dcea7e5bb1b2e9
+  # https://cygwin.com/git/?p=newlib-cygwin.git;a=commit;h=7f67575711f91ee0b738f836e2ed93c2e41b5248
+  apply_git_am_with_msg signal-crash-backport.patch
+
  apply_git_am_with_msg 0001-Add-MSYS2-triplet.patch \
   0002-Fix-msys-library-name-in-import-libraries.patch \
   0003-Rename-dll-from-cygwin-to-msys.patch \

msys2-runtime/signal-crash-backport.patch

@@ -0,0 +1,39 @@
+diff --git a/winsup/cygwin/scripts/gendef b/winsup/cygwin/scripts/gendef
+index a2f0392bc..861a2405b 100755
+--- a/winsup/cygwin/scripts/gendef
++++ b/winsup/cygwin/scripts/gendef
+@@ -179,6 +179,7 @@ sigdelayed:
+ 	movq	%rsp,%rbp
+ 	pushf
+ 	.seh_pushreg %rax			# fake, there's no .seh_pushreg for the flags
++	cld					# x86_64 ABI requires direction flag cleared
+ 	# stack is aligned or unaligned on entry!
+ 	# make sure it is aligned from here on
+ 	# We could be called from an interrupted thread which doesn't know
+
+diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
+index 2e25aa214..a3aae2ce5 100644
+--- a/winsup/cygwin/exceptions.cc
++++ b/winsup/cygwin/exceptions.cc
+@@ -1791,6 +1791,13 @@ _cygtls::call_signal_handler ()
+ 	     to 16 byte. */
+ 	  uintptr_t new_sp = ((uintptr_t) _my_tls.altstack.ss_sp
+ 			      + _my_tls.altstack.ss_size) & ~0xf;
++	  /* Copy context1 to the alternate signal stack area, because the
++	     context1 allocated in the normal stack area is not accessible
++	     from the signal handler that uses alternate signal stack. */
++	  thiscontext = (ucontext_t *) ((new_sp - sizeof (ucontext_t)) & ~0xf);
++	  memcpy (thiscontext, &context1, sizeof (ucontext_t));
++	  new_sp = (uintptr_t) thiscontext;
++
+ 	  /* In assembler: Save regs on new stack, move to alternate stack,
+ 	     call thisfunc, revert stack regs. */
+ #ifdef __x86_64__
+@@ -1834,6 +1841,7 @@ _cygtls::call_signal_handler ()
+ #else
+ #error unimplemented for this target
+ #endif
++	  memcpy (&context1, thiscontext, sizeof (ucontext_t));
+ 	}
+       else
+ 	/* No alternate signal stack requested or available, just call