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-rw-r--r--sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h280
1 files changed, 280 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h b/sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h
new file mode 100644
index 0000000000..6f1c9d745b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h
@@ -0,0 +1,280 @@
+/* Copyright (C) 2005-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <sysdeps/generic/sysdep.h>
+#include <tls.h>
+#ifndef __ASSEMBLER__
+# include <nptl/pthreadP.h>
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
+
+# ifndef NO_ERROR
+#  define NO_ERROR -0x1000
+# endif
+
+/* The syscall cancellation mechanism requires userspace
+   assistance, the following code does roughly this:
+
+	do arguments (read arg5 and arg6 to registers)
+	setup frame
+
+	check if there are threads, yes jump to pseudo_cancel
+
+	unthreaded:
+		syscall
+		check syscall return (jump to pre_end)
+		set errno
+		set return to -1
+		(jump to pre_end)
+
+	pseudo_cancel:
+		cenable
+		syscall
+		cdisable
+		check syscall return (jump to pre_end)
+		set errno
+		set return to -1
+
+	pre_end
+		restore stack
+
+	It is expected that 'ret' and 'END' macros will
+	append an 'undo arguments' and 'return' to the
+	this PSEUDO macro. */
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args)				\
+	ENTRY (__##syscall_name##_nocancel)				\
+	DOARGS_##args					ASM_LINE_SEP	\
+	stwm TREG, 64(%sp)				ASM_LINE_SEP	\
+	.cfi_offset TREG, 0				ASM_LINE_SEP	\
+	.cfi_adjust_cfa_offset 64			ASM_LINE_SEP	\
+	stw %sp, -4(%sp)				ASM_LINE_SEP	\
+	.cfi_offset 30, -4				ASM_LINE_SEP	\
+	stw %r19, -32(%sp)				ASM_LINE_SEP	\
+	.cfi_offset 19, -32				ASM_LINE_SEP	\
+	/* Save r19 */					ASM_LINE_SEP	\
+	SAVE_PIC(TREG)					ASM_LINE_SEP	\
+	/* Do syscall, delay loads # */			ASM_LINE_SEP	\
+	ble  0x100(%sr2,%r0)				ASM_LINE_SEP	\
+	ldi SYS_ify (syscall_name), %r20 /* delay */	ASM_LINE_SEP	\
+	ldi NO_ERROR,%r1				ASM_LINE_SEP	\
+	cmpb,>>=,n %r1,%ret0,L(pre_nc_end)		ASM_LINE_SEP	\
+	/* Restore r19 from TREG */			ASM_LINE_SEP	\
+	LOAD_PIC(TREG) /* delay */			ASM_LINE_SEP	\
+	SYSCALL_ERROR_HANDLER				ASM_LINE_SEP	\
+	/* Use TREG for temp storage */			ASM_LINE_SEP	\
+	copy %ret0, TREG /* delay */			ASM_LINE_SEP	\
+	/* OPTIMIZE: Don't reload r19 */		ASM_LINE_SEP	\
+	/* do a -1*syscall_ret0 */			ASM_LINE_SEP	\
+	sub %r0, TREG, TREG				ASM_LINE_SEP	\
+	/* Store into errno location */			ASM_LINE_SEP	\
+	stw TREG, 0(%sr0,%ret0)				ASM_LINE_SEP	\
+	/* return -1 as error */			ASM_LINE_SEP	\
+	ldi -1, %ret0					ASM_LINE_SEP	\
+L(pre_nc_end):						ASM_LINE_SEP	\
+	/* No need to LOAD_PIC */			ASM_LINE_SEP	\
+	/* Undo frame */				ASM_LINE_SEP	\
+	ldwm -64(%sp),TREG				ASM_LINE_SEP	\
+	.cfi_adjust_cfa_offset -64			ASM_LINE_SEP	\
+	/* Restore rp before exit */			ASM_LINE_SEP	\
+	ldw -20(%sp), %rp				ASM_LINE_SEP	\
+	.cfi_restore 2					ASM_LINE_SEP	\
+	ret						ASM_LINE_SEP	\
+	END(__##syscall_name##_nocancel)		ASM_LINE_SEP	\
+	/**********************************************/ASM_LINE_SEP	\
+	ENTRY (name)							\
+	DOARGS_##args					ASM_LINE_SEP	\
+	stwm TREG, 64(%sp)				ASM_LINE_SEP	\
+	.cfi_adjust_cfa_offset 64			ASM_LINE_SEP	\
+	stw %sp, -4(%sp)				ASM_LINE_SEP	\
+	.cfi_offset 30, -4				ASM_LINE_SEP	\
+	stw %r19, -32(%sp)				ASM_LINE_SEP	\
+	.cfi_offset 19, -32				ASM_LINE_SEP	\
+	/* Done setting up frame, continue... */	ASM_LINE_SEP	\
+	SINGLE_THREAD_P					ASM_LINE_SEP	\
+	cmpib,<>,n 0,%ret0,L(pseudo_cancel)		ASM_LINE_SEP	\
+L(unthreaded):						ASM_LINE_SEP	\
+	/* Save r19 */					ASM_LINE_SEP	\
+	SAVE_PIC(TREG)					ASM_LINE_SEP	\
+	/* Do syscall, delay loads # */			ASM_LINE_SEP	\
+	ble  0x100(%sr2,%r0)				ASM_LINE_SEP	\
+	ldi SYS_ify (syscall_name), %r20 /* delay */	ASM_LINE_SEP	\
+	ldi NO_ERROR,%r1				ASM_LINE_SEP	\
+	cmpb,>>=,n %r1,%ret0,L(pre_end)			ASM_LINE_SEP	\
+	/* Restore r19 from TREG */			ASM_LINE_SEP	\
+	LOAD_PIC(TREG) /* delay */			ASM_LINE_SEP	\
+	SYSCALL_ERROR_HANDLER				ASM_LINE_SEP	\
+	/* Use TREG for temp storage */			ASM_LINE_SEP	\
+	copy %ret0, TREG /* delay */			ASM_LINE_SEP	\
+	/* OPTIMIZE: Don't reload r19 */		ASM_LINE_SEP	\
+	/* do a -1*syscall_ret0 */			ASM_LINE_SEP	\
+	sub %r0, TREG, TREG				ASM_LINE_SEP	\
+	/* Store into errno location */			ASM_LINE_SEP	\
+	stw TREG, 0(%sr0,%ret0)				ASM_LINE_SEP	\
+	b L(pre_end)					ASM_LINE_SEP	\
+	/* return -1 as error */			ASM_LINE_SEP	\
+	ldi -1, %ret0 /* delay */			ASM_LINE_SEP	\
+L(pseudo_cancel):					ASM_LINE_SEP	\
+	PUSHARGS_##args /* Save args */			ASM_LINE_SEP	\
+	/* Save r19 into TREG */			ASM_LINE_SEP	\
+	CENABLE /* FUNC CALL */				ASM_LINE_SEP	\
+	SAVE_PIC(TREG) /* delay */			ASM_LINE_SEP	\
+	/* restore syscall args */			ASM_LINE_SEP	\
+	POPARGS_##args					ASM_LINE_SEP	\
+	/* save mask from cenable (use stub rp slot) */	ASM_LINE_SEP	\
+	stw %ret0, -24(%sp)				ASM_LINE_SEP	\
+	/* ... SYSCALL ... */				ASM_LINE_SEP	\
+	ble 0x100(%sr2,%r0)				ASM_LINE_SEP    \
+	ldi SYS_ify (syscall_name), %r20 /* delay */	ASM_LINE_SEP	\
+	/* ............... */				ASM_LINE_SEP	\
+	LOAD_PIC(TREG)					ASM_LINE_SEP	\
+	/* pass mask as arg0 to cdisable */		ASM_LINE_SEP	\
+	ldw -24(%sp), %r26				ASM_LINE_SEP	\
+	CDISABLE					ASM_LINE_SEP	\
+	stw %ret0, -24(%sp) /* delay */			ASM_LINE_SEP	\
+	/* Restore syscall return */			ASM_LINE_SEP	\
+	ldw -24(%sp), %ret0				ASM_LINE_SEP	\
+	/* compare error */				ASM_LINE_SEP	\
+	ldi NO_ERROR,%r1				ASM_LINE_SEP	\
+	/* branch if no error */			ASM_LINE_SEP	\
+	cmpb,>>=,n %r1,%ret0,L(pre_end)			ASM_LINE_SEP	\
+	LOAD_PIC(TREG)	/* cond. nullify */		ASM_LINE_SEP	\
+	copy %ret0, TREG /* save syscall return */	ASM_LINE_SEP	\
+	SYSCALL_ERROR_HANDLER				ASM_LINE_SEP	\
+	/* make syscall res value positive */		ASM_LINE_SEP	\
+	sub %r0, TREG, TREG	/* delay */		ASM_LINE_SEP	\
+	/* No need to LOAD_PIC */			ASM_LINE_SEP	\
+	/* store into errno location */			ASM_LINE_SEP	\
+	stw TREG, 0(%sr0,%ret0)				ASM_LINE_SEP	\
+	/* return -1 */					ASM_LINE_SEP	\
+	ldi -1, %ret0					ASM_LINE_SEP	\
+L(pre_end):						ASM_LINE_SEP	\
+	/* No need to LOAD_PIC */			ASM_LINE_SEP	\
+	/* Undo frame */				ASM_LINE_SEP	\
+	ldwm -64(%sp),TREG				ASM_LINE_SEP	\
+	.cfi_adjust_cfa_offset -64			ASM_LINE_SEP	\
+	/* Restore rp before exit */			ASM_LINE_SEP	\
+	ldw -20(%sp), %rp				ASM_LINE_SEP	\
+	.cfi_restore 2					ASM_LINE_SEP
+
+/* Save arguments into our frame */
+# define PUSHARGS_0	/* nothing to do */
+# define PUSHARGS_1	PUSHARGS_0 stw %r26, -36(%sr0,%sp)	ASM_LINE_SEP	\
+			.cfi_offset 26, -36			ASM_LINE_SEP
+# define PUSHARGS_2	PUSHARGS_1 stw %r25, -40(%sr0,%sp)	ASM_LINE_SEP	\
+			.cfi_offset 25, -40			ASM_LINE_SEP
+# define PUSHARGS_3	PUSHARGS_2 stw %r24, -44(%sr0,%sp)	ASM_LINE_SEP	\
+			.cfi_offset 24, -44			ASM_LINE_SEP
+# define PUSHARGS_4	PUSHARGS_3 stw %r23, -48(%sr0,%sp)	ASM_LINE_SEP	\
+			.cfi_offset 23, -48			ASM_LINE_SEP
+# define PUSHARGS_5	PUSHARGS_4 stw %r22, -52(%sr0,%sp)	ASM_LINE_SEP	\
+			.cfi_offset 22, -52			ASM_LINE_SEP
+# define PUSHARGS_6	PUSHARGS_5 stw %r21, -56(%sr0,%sp)	ASM_LINE_SEP	\
+			.cfi_offset 21, -56			ASM_LINE_SEP
+
+/* Bring them back from the stack */
+# define POPARGS_0	/* nothing to do */
+# define POPARGS_1	POPARGS_0 ldw -36(%sr0,%sp), %r26	ASM_LINE_SEP	\
+			.cfi_restore 26				ASM_LINE_SEP
+# define POPARGS_2	POPARGS_1 ldw -40(%sr0,%sp), %r25	ASM_LINE_SEP	\
+			.cfi_restore 25				ASM_LINE_SEP
+# define POPARGS_3	POPARGS_2 ldw -44(%sr0,%sp), %r24	ASM_LINE_SEP	\
+			.cfi_restore 24				ASM_LINE_SEP
+# define POPARGS_4	POPARGS_3 ldw -48(%sr0,%sp), %r23	ASM_LINE_SEP	\
+			.cfi_restore 23				ASM_LINE_SEP
+# define POPARGS_5	POPARGS_4 ldw -52(%sr0,%sp), %r22	ASM_LINE_SEP	\
+			.cfi_restore 22				ASM_LINE_SEP
+# define POPARGS_6	POPARGS_5 ldw -56(%sr0,%sp), %r21	ASM_LINE_SEP	\
+			.cfi_restore 21				ASM_LINE_SEP
+
+# ifdef IS_IN_libpthread
+#  ifdef PIC
+#   define CENABLE .import __pthread_enable_asynccancel,code ASM_LINE_SEP \
+			bl __pthread_enable_asynccancel,%r2 ASM_LINE_SEP
+#   define CDISABLE .import __pthread_disable_asynccancel,code ASM_LINE_SEP \
+			bl __pthread_disable_asynccancel,%r2 ASM_LINE_SEP
+#  else
+#   define CENABLE .import __pthread_enable_asynccancel,code ASM_LINE_SEP \
+			bl __pthread_enable_asynccancel,%r2 ASM_LINE_SEP
+#   define CDISABLE .import __pthread_disable_asynccancel,code ASM_LINE_SEP \
+			bl __pthread_disable_asynccancel,%r2 ASM_LINE_SEP
+#  endif
+# elif !defined NOT_IN_libc
+#  ifdef PIC
+#   define CENABLE .import __libc_enable_asynccancel,code ASM_LINE_SEP \
+			bl __libc_enable_asynccancel,%r2 ASM_LINE_SEP
+#   define CDISABLE	.import __libc_disable_asynccancel,code ASM_LINE_SEP \
+			bl __libc_disable_asynccancel,%r2 ASM_LINE_SEP
+#  else
+#   define CENABLE .import __libc_enable_asynccancel,code ASM_LINE_SEP \
+			bl __libc_enable_asynccancel,%r2 ASM_LINE_SEP
+#   define CDISABLE	.import __libc_disable_asynccancel,code ASM_LINE_SEP \
+			bl __libc_disable_asynccancel,%r2 ASM_LINE_SEP
+#  endif
+# elif defined IS_IN_librt
+#  ifdef PIC
+#   define CENABLE .import __librt_enable_asynccancel,code ASM_LINE_SEP \
+			bl __librt_enable_asynccancel,%r2 ASM_LINE_SEP
+#   define CDISABLE .import __librt_disable_asynccancel,code ASM_LINE_SEP \
+			bl __librt_disable_asynccancel,%r2 ASM_LINE_SEP
+#  else
+#   define CENABLE .import __librt_enable_asynccancel,code ASM_LINE_SEP \
+			bl __librt_enable_asynccancel,%r2 ASM_LINE_SEP
+#   define CDISABLE .import __librt_disable_asynccancel,code ASM_LINE_SEP \
+			bl __librt_disable_asynccancel,%r2 ASM_LINE_SEP
+#  endif
+# else
+#  error Unsupported library
+# endif
+
+# ifdef IS_IN_libpthread
+#  define __local_multiple_threads __pthread_multiple_threads
+# elif !defined NOT_IN_libc
+#  define __local_multiple_threads __libc_multiple_threads
+# elif IS_IN_librt
+#  define __local_multiple_threads __librt_multiple_threads
+# else
+#  error Unsupported library
+# endif
+
+# ifndef __ASSEMBLER__
+#  define SINGLE_THREAD_P \
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+				   header.multiple_threads) == 0, 1)
+# else
+/* Read the value of header.multiple_threads from the thread pointer */
+#  define SINGLE_THREAD_P							\
+	mfctl %cr27, %ret0					ASM_LINE_SEP	\
+	ldw MULTIPLE_THREADS_THREAD_OFFSET(%sr0,%ret0),%ret0	ASM_LINE_SEP
+# endif
+#elif !defined __ASSEMBLER__
+
+/* This code should never be used but we define it anyhow.  */
+# define SINGLE_THREAD_P (1)
+# define NO_CANCELLATION 1
+
+#endif
+/* !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt */
+
+#ifndef __ASSEMBLER__
+# define RTLD_SINGLE_THREAD_P \
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+				   header.multiple_threads) == 0, 1)
+#endif