Backport upstream patch to solve elfutils issue on RISC-V

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>

glibc-riscv-85bd1ddbdfdfd13cfd06f7c367519b6ed3360843.patch

@@ -0,0 +1,106 @@
+diff --git a/elf/Makefile b/elf/Makefile
+index 7315c253..b3205c26 100644
+--- a/elf/Makefile
++++ b/elf/Makefile
+@@ -1507,4 +1507,4 @@ $(objpfx)tst-big-note: $(objpfx)tst-big-note-lib.so
+ 
+ $(objpfx)tst-unwind-ctor: $(objpfx)tst-unwind-ctor-lib.so
+ 
+-CFLAGS-tst-unwind-main.c += -funwind-tables
++CFLAGS-tst-unwind-main.c += -funwind-tables -DUSE_PTHREADS=0
+diff --git a/elf/tst-unwind-main.c b/elf/tst-unwind-main.c
+index 4089e7e9..0c345dc3 100644
+--- a/elf/tst-unwind-main.c
++++ b/elf/tst-unwind-main.c
+@@ -20,19 +20,41 @@
+ #include <unistd.h>
+ #include <support/test-driver.h>
+ 
++#if USE_PTHREADS
++# include <pthread.h>
++# include <error.h>
++#endif
++
+ static _Unwind_Reason_Code
+ callback (struct _Unwind_Context *ctx, void *arg)
+ {
+   return _URC_NO_REASON;
+ }
+ 
+-int
+-main (void)
++static void *
++func (void *a)
+ {
+   /* Arrange for this test to be killed if _Unwind_Backtrace runs into an
+      endless loop.  We cannot use the test driver because the complete
+      call chain needs to be compiled with -funwind-tables so that
+-     _Unwind_Backtrace is able to reach _start.  */
++     _Unwind_Backtrace is able to reach the start routine.  */
+   alarm (DEFAULT_TIMEOUT);
+   _Unwind_Backtrace (callback, 0);
++  return a;
++}
++
++int
++main (void)
++{
++#if USE_PTHREADS
++  pthread_t thr;
++  int rc = pthread_create (&thr, NULL, &func, NULL);
++  if (rc)
++    error (1, rc, "pthread_create");
++  rc = pthread_join (thr, NULL);
++  if (rc)
++    error (1, rc, "pthread_join");
++#else
++  func (NULL);
++#endif
+ }
+diff --git a/nptl/Makefile b/nptl/Makefile
+index 0e316edf..8719f4ef 100644
+--- a/nptl/Makefile
++++ b/nptl/Makefile
+@@ -320,7 +320,8 @@ tests = tst-attr1 tst-attr2 tst-attr3 tst-default-attr \
+ 	tst-cnd-timedwait tst-thrd-detach tst-mtx-basic tst-thrd-sleep \
+ 	tst-mtx-recursive tst-tss-basic tst-call-once tst-mtx-timedlock \
+ 	tst-rwlock-pwn \
+-	tst-rwlock-tryrdlock-stall tst-rwlock-trywrlock-stall
++	tst-rwlock-tryrdlock-stall tst-rwlock-trywrlock-stall \
++	tst-unwind-thread
+ 
+ tests-internal := tst-rwlock19 tst-rwlock20 \
+ 		  tst-sem11 tst-sem12 tst-sem13 \
+@@ -710,6 +711,8 @@ $(objpfx)tst-audit-threads: $(objpfx)tst-audit-threads-mod2.so
+ $(objpfx)tst-audit-threads.out: $(objpfx)tst-audit-threads-mod1.so
+ tst-audit-threads-ENV = LD_AUDIT=$(objpfx)tst-audit-threads-mod1.so
+ 
++CFLAGS-tst-unwind-thread.c += -funwind-tables
++
+ # The tests here better do not run in parallel
+ ifneq ($(filter %tests,$(MAKECMDGOALS)),)
+ .NOTPARALLEL:
+diff --git a/nptl/tst-unwind-thread.c b/nptl/tst-unwind-thread.c
+new file mode 100644
+index 00000000..d5c38e37
+--- /dev/null
++++ b/nptl/tst-unwind-thread.c
+@@ -0,0 +1,2 @@
++#define USE_PTHREADS 1
++#include "../elf/tst-unwind-main.c"
+diff --git a/sysdeps/unix/sysv/linux/riscv/clone.S b/sysdeps/unix/sysv/linux/riscv/clone.S
+index c079c1fb..0ff9ab3f 100644
+--- a/sysdeps/unix/sysv/linux/riscv/clone.S
++++ b/sysdeps/unix/sysv/linux/riscv/clone.S
+@@ -69,6 +69,11 @@ L (error):
+ 
+ ENTRY (__thread_start)
+ L (thread_start):
++	/* Terminate call stack by noting ra is undefined.  Use a dummy
++	   .cfi_label to force starting the FDE.  */
++	.cfi_label .Ldummy
++	cfi_undefined (ra)
++
+ 	/* Restore the arg for user's function.  */
+ 	REG_L		a1,0(sp)	/* Function pointer.  */
+ 	REG_L		a0,SZREG(sp)	/* Argument pointer.  */

glibc.spec

@@ -87,7 +87,7 @@
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 7%{?dist}
+Release: 7.0.riscv64%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -160,6 +160,9 @@ Patch28: glibc-rh1615608.patch
 Patch29: glibc-rh1670028.patch
 Patch99: glibc-rh1674280.patch
 
+# Backport https://sourceware.org/git/?p=glibc.git;a=commit;h=85bd1ddbdfdfd13cfd06f7c367519b6ed3360843
+Patch120: glibc-riscv-85bd1ddbdfdfd13cfd06f7c367519b6ed3360843.patch
+
 ##############################################################################
 # Continued list of core "glibc" package information:
 ##############################################################################