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.

1 files changed, 22 insertions, 20 deletions

diff --git a/sysdeps/unix/sysv/linux/s390/sys/ptrace.h b/sysdeps/unix/sysv/linux/s390/sys/ptrace.h
index 7caf1015b2..88079fc7a7 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
 };