Note; the test is known to fail on the RHEL 7.7 kernel - the patch

fixes PT_GETREGS (which we want) but adds PTRACE_SINGLEBLOCK (which we

don't support yet).  So, the test case was not included.  - DJ

commit b08a6a0dea63742313ed3d9577c1e2d83436b196

Author: Stefan Liebler <stli@linux.vnet.ibm.com>

Date:   Mon Jun 19 16:27:25 2017 +0200

    S390: Sync ptrace.h with kernel. [BZ #21539]

    This patch removes PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS

    and PTRACE_SETFPREGS as these requests does not exist on s390 kernel.

    But the kernel has support for PTRACE_SINGLEBLOCK,

    PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA, PTRACE_POKEUSR_AREA,

    PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE, PTRACE_DISABLE_TE and

    PTRACE_TE_ABORT_RAND.  Thus those are defined now.

    The current kernel s390 specific ptrace.h file also defines

    PTRACE_PEEKTEXT_AREA, PTRACE_PEEKDATA_AREA, PTRACE_POKETEXT_AREA,

    PTRACE_POKEDATA_AREA, PTRACE_PEEK_SYSTEM_CALL, PTRACE_POKE_SYSTEM_CALL

    and PTRACE_PROT, but those requests are not supported.

    Thus those defines are skipped in glibc ptrace.h.

    There were old includes of ptrace.h in sysdeps/s390/fpu/fesetenv.c.

    The ptrace feature isn't used there anymore, thus I removed the includes.

    Before this patch, <glibc>/sysdeps/unix/sysv/linux/s390/sys/ptrace.h

    uses ptrace-request 12 for PTRACE_GETREGS,

    but <kernel>/include/uapi/linux/ptrace.h uses 12 for PTRACE_SINGLEBLOCK.

    The s390 kernel has never had support for PTRACE_GETREGS!

    Thus glibc ptrace.h is adjusted to match kernel ptrace.h.

    The new s390 specific test ensures, that PTRACE_SINGLEBLOCK defined

    in glibc works as expected.  If the kernel would interpret it as

    PTRACE_GETREGS, then the testcase will not make any progress

    and will time out.

    ChangeLog:

    	[BZ #21539]

    	* NEWS: Mention s390 ptrace request changes.

    	* sysdeps/unix/sysv/linux/s390/sys/ptrace.h

    	(PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS,

    	PTRACE_SETFPREGS): Remove enum constant.

    	(PT_GETREGS, PT_SETREGS, PT_GETFPREGS, T_SETFPREGS):

    	Remove defines.

    	(PTRACE_SINGLEBLOCK): New enum constant.

    	(PT_STEPBLOCK): New define.

    	(PTRACE_PEEKUSR_AREA, PTRACE_POKEUSR_AREA,

    	PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE, PTRACE_DISABLE_TE,

    	PTRACE_TE_ABORT_RAND): New enum constant and define.

    	* sysdeps/s390/fpu/fesetenv.c: Remove ptrace.h includes.

    	* sysdeps/unix/sysv/linux/s390/tst-ptrace-singleblock.c:

    	New file.

    	* sysdeps/unix/sysv/linux/s390/Makefile: Add test.

diff --git a/sysdeps/s390/fpu/fesetenv.c b/sysdeps/s390/fpu/fesetenv.c

index 4c9bcf0..0f64a3f 100644

--- a/sysdeps/s390/fpu/fesetenv.c

+++ b/sysdeps/s390/fpu/fesetenv.c

@@ -20,8 +20,6 @@

 #include <fenv_libc.h>

 #include <fpu_control.h>

 #include <stddef.h>

-#include <asm/ptrace.h>

-#include <sys/ptrace.h>

 #include <unistd.h>

 int

diff --git a/sysdeps/unix/sysv/linux/s390/sys/ptrace.h b/sysdeps/unix/sysv/linux/s390/sys/ptrace.h

index 7caf101..88079fc 100644

--- a/sysdeps/unix/sysv/linux/s390/sys/ptrace.h

+++ b/sysdeps/unix/sysv/linux/s390/sys/ptrace.h

@@ -89,25 +89,9 @@ enum __ptrace_request

   PTRACE_SINGLESTEP = 9,

 #define PT_STEP PTRACE_SINGLESTEP

-  /* Get all general purpose registers used by a processes.

-     This is not supported on all machines.  */

-   PTRACE_GETREGS = 12,

-#define PT_GETREGS PTRACE_GETREGS

-

-  /* Set all general purpose registers used by a processes.

-     This is not supported on all machines.  */

-   PTRACE_SETREGS = 13,

-#define PT_SETREGS PTRACE_SETREGS

-

-  /* Get all floating point registers used by a processes.

-     This is not supported on all machines.  */

-   PTRACE_GETFPREGS = 14,

-#define PT_GETFPREGS PTRACE_GETFPREGS

-

-  /* Set all floating point registers used by a processes.

-     This is not supported on all machines.  */

-   PTRACE_SETFPREGS = 15,

-#define PT_SETFPREGS PTRACE_SETFPREGS

+  /* Execute process until next taken branch.  */

+  PTRACE_SINGLEBLOCK = 12,

+#define PT_STEPBLOCK PTRACE_SINGLEBLOCK

   /* Attach to a process that is already running. */

   PTRACE_ATTACH = 16,

@@ -167,8 +151,26 @@ enum __ptrace_request

   PTRACE_SETSIGMASK = 0x420b,

 #define PTRACE_SETSIGMASK PTRACE_SETSIGMASK

-  PTRACE_SECCOMP_GET_FILTER = 0x420c

+  PTRACE_SECCOMP_GET_FILTER = 0x420c,

 #define PTRACE_SECCOMP_GET_FILTER PTRACE_SECCOMP_GET_FILTER

+

+  PTRACE_PEEKUSR_AREA = 0x5000,

+#define PTRACE_PEEKUSR_AREA PTRACE_PEEKUSR_AREA

+

+  PTRACE_POKEUSR_AREA = 0x5001,

+#define PTRACE_POKEUSR_AREA PTRACE_POKEUSR_AREA

+

+  PTRACE_GET_LAST_BREAK = 0x5006,

+#define PTRACE_GET_LAST_BREAK PTRACE_GET_LAST_BREAK

+

+  PTRACE_ENABLE_TE = 0x5009,

+#define PTRACE_ENABLE_TE PTRACE_ENABLE_TE

+

+  PTRACE_DISABLE_TE = 0x5010,

+#define PTRACE_DISABLE_TE PTRACE_DISABLE_TE

+

+  PTRACE_TE_ABORT_RAND = 0x5011

+#define PTRACE_TE_ABORT_RAND PTRACE_TE_ABORT_RAND

 };