libunwind: fix mips*musl build w/ musl-1.2.1

srcpkgs/libunwind/patches/mips-musl.patch

@@ -1,11 +1,10 @@
 --- src/mips/getcontext.S.orig
 +++ src/mips/getcontext.S
-@@ -24,7 +24,7 @@
+@@ -24,7 +24,6 @@
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
  
  #include "offsets.h"
 -#include <endian.h>
-+#include <bits/endian.h>
  
  	.text
  

srcpkgs/libunwind/patches/mips-read_write_s32.patch

@@ -0,0 +1,52 @@
+--- include/tdep-mips/libunwind_i.h	2020-11-10 17:14:01.000000000 +0100
++++ include/tdep-mips/libunwind_i.h	2021-01-11 22:12:16.993539625 +0100
+@@ -148,9 +148,10 @@
+ static inline int
+ read_s32 (struct dwarf_cursor *c, unw_word_t addr, unw_word_t *val)
+ {
+-  int offset = addr & 4;
+   int ret;
+   unw_word_t memval;
++#if _MIPS_SIM == _ABI64
++  int offset = addr & 4;
+ 
+   ret = (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 0, c->as_arg);
+   if (ret < 0)
+@@ -160,6 +161,13 @@
+     *val = (int32_t) memval;
+   else
+     *val = (int32_t) (memval >> 32);
++#else
++  ret = (*c->as->acc.access_mem) (c->as, addr, &memval, 0, c->as_arg);
++  if (ret < 0)
++    return ret;
++
++  *val = (int32_t) memval;
++#endif
+ 
+   return 0;
+ }
+@@ -167,9 +175,10 @@
+ static inline int
+ write_s32 (struct dwarf_cursor *c, unw_word_t addr, const unw_word_t *val)
+ {
+-  int offset = addr & 4;
+-  int ret;
+   unw_word_t memval;
++#if _MIPS_SIM == _ABI64
++  int offset = addr & 4;
++  int ret;
+ 
+   ret = (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 0, c->as_arg);
+   if (ret < 0)
+@@ -181,6 +190,10 @@
+     memval = (memval & 0xffffffffLL) | (uint32_t) (*val << 32);
+ 
+   return (*c->as->acc.access_mem) (c->as, addr - offset, &memval, 1, c->as_arg);
++#else
++  memval =  (uint32_t) *val;
++  return (*c->as->acc.access_mem) (c->as, addr, &memval, 1, c->as_arg);
++#endif
+ }
+ 
+ /* FIXME: Implement these for the MIPS FPU.  */

srcpkgs/libunwind/template

@@ -19,6 +19,7 @@ case "$XBPS_TARGET_MACHINE" in
 	i686-musl) LDFLAGS=" -lssp_nonshared" ;;
 	ppc64*-musl) makedepends+=" libucontext-devel"; LDFLAGS=" -lucontext" ;;
 	ppc*-musl) makedepends+=" libucontext-devel"; LDFLAGS=" -lucontext -lssp_nonshared" ;;
+	mips*-musl) CLAGS="-D_MIPS_SIM=_ABI32" ;;
 	*) ;;
 esac