Revert "libc: Provide ucontext_t/mcontext_t/<sys/ucontext.h>"

This creates build issues in the internal Android tree.
Will investigate later.

Original patch: https://android-review.googlesource.com/#/c/38875/

Change-Id: I12c5995ebf172890051af42a5d3b31014c9c5117

1 files changed, 127 insertions, 38 deletions

diff --git a/libc/arch-mips/include/machine/signal.h b/libc/arch-mips/include/machine/signal.h
index 6378c61..4efb856 100644
--- a/libc/arch-mips/include/machine/signal.h
+++ b/libc/arch-mips/include/machine/signal.h
@@ -1,58 +1,147 @@
+/*	$OpenBSD: signal.h,v 1.8 2006/01/09 18:18:37 millert Exp $	*/
+
 /*
- * Copyright (C) 2012 The Android Open Source Project
- * All rights reserved.
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ralph Campbell.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- *  * Redistributions of source code must retain the above copyright
+ * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
  *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
+ *
+ *	@(#)signal.h	8.1 (Berkeley) 6/10/93
  */
-#ifndef _ARCH_MIPS_MACHINE_SIGNAL_H_
-#define _ARCH_MIPS_MACHINE_SIGNAL_H_
+
+#ifndef _MIPS_SIGNAL_H_
+#define _MIPS_SIGNAL_H_
 
 #include <sys/cdefs.h>
 
-__BEGIN_DECLS
+#if !defined(__LANGUAGE_ASSEMBLY)
+#include <sys/types.h>
+
+/*
+ * Machine-dependent signal definitions
+ */
+typedef int sig_atomic_t;
 
-#include <asm/signal.h>
-#include <asm/sigcontext.h>
+#if __BSD_VISIBLE || __XPG_VISIBLE >= 420
 
-#ifdef _ASM_GENERIC_SIGINFO_H
-#error "You cannot include <asm/siginfo.h> before <signal.h>!"
-#endif
-#define __ARCH_SI_UID_T __kernel_uid32_t
-#include <asm/siginfo.h>
-#undef __ARCH_SI_UID_T
+/*
+ * Information pushed on stack when a signal is delivered.
+ * This is used by the kernel to restore state following
+ * execution of the signal handler.  It is also made available
+ * to the handler to allow it to restore state properly if
+ * a non-standard exit is performed.
+ */
 
-#include <stdint.h>
+#if defined(__ANDROID__)
 
-/* See comment in arch-arm/include/machine/signal.h.
- * The MIPS kernel also uses 128-bit signal masks while defining sigset-t
- * as a 32-bit type.
+/*
+ * The Linux and OpenBSD sigcontext structures are slightly different
+ * This is the Linux O32 ABI compatible sigcontext
  */
-typedef unsigned long __kernel_sigset_t[4];
 
-/* Note: Unlike ARM and x86, the MIPS <asm/signal.h> properly defines _NSIG
- * and thus SIGRTMAX. */
+struct sigcontext {
+	unsigned int sc_regmask;
+	unsigned int sc_status;
+	unsigned long long sc_pc;
+	unsigned long long sc_regs[32];
+	unsigned long long sc_fpregs[32];
+	unsigned int sc_acx;
+	unsigned int sc_fpc_csr;
+	unsigned int sc_fpc_eir;
+	unsigned int sc_used_math;
+	unsigned int sc_dsp;
+	unsigned long long sc_mdhi;
+	unsigned long long sc_mdlo;
+	unsigned long sc_hi1;
+	unsigned long sc_lo1;
+	unsigned long sc_hi2;
+	unsigned long sc_lo2;
+	unsigned long sc_hi3;
+	unsigned long sc_lo3;
+};
+
+#else
+
+struct	sigcontext {
+	long	sc_onstack;	/* sigstack state to restore */
+	long	 sc_mask;	/* signal mask to restore */
+	__register_t sc_pc;	/* pc at time of signal */
+	__register_t sc_regs[32]; /* processor regs 0 to 31 */
+	__register_t mullo;	/* mullo and mulhi registers... */
+	__register_t mulhi;	/* mullo and mulhi registers... */
+	f_register_t sc_fpregs[33]; /* fp regs 0 to 31 and csr */
+	long	sc_fpused;	/* fp has been used */
+	long	sc_fpc_eir;	/* floating point exception instruction reg */
+	long	xxx[8];		/* XXX reserved */
+};
+#endif
+#endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */
+
+#else /* __LANGUAGE_ASSEMBLY */
+
+#ifdef __ANDROID__
+
+#define	SC_REGMASK	(0*REGSZ)
+#define	SC_STATUS	(1*REGSZ)
+#define	SC_PC		(2*REGSZ)
+#define	SC_REGS		(SC_PC+8)
+#define	SC_FPREGS	(SC_REGS+32*8)
+#define	SC_ACX		(SC_FPREGS+32*REGSZ_FP)
+#define	SC_FPC_CSR	(SC_ACX+1*REGSZ)
+#define	SC_FPC_EIR	(SC_ACX+2*REGSZ)
+#define	SC_USED_MATH	(SC_ACX+3*REGSZ)
+#define	SC_DSP		(SC_ACX+4*REGSZ)
+#define	SC_MDHI		(SC_ACX+5*REGSZ)
+#define	SC_MDLO		(SC_MDHI+8)
+#define	SC_HI1		(SC_MDLO+8)
+#define	SC_LO1		(SC_HI1+1*REGSZ)
+#define	SC_HI2		(SC_HI1+2*REGSZ)
+#define	SC_LO2		(SC_HI1+3*REGSZ)
+#define	SC_HI3		(SC_HI1+4*REGSZ)
+#define	SC_LO3		(SC_HI1+5*REGSZ)
+/* OpenBSD compatibility */
+#define	SC_MASK		SC_REGMASK
+#define	SC_FPUSED	SC_USED_MATH
+
+#else
+
+#define SC_ONSTACK	(0 * REGSZ)
+#define	SC_MASK		(1 * REGSZ)
+#define	SC_PC		(2 * REGSZ)
+#define	SC_REGS		(3 * REGSZ)
+#define	SC_MULLO	(35 * REGSZ)
+#define	SC_MULHI	(36 * REGSZ)
+#define	SC_FPREGS	(37 * REGSZ)
+#define	SC_FPUSED	(70 * REGSZ)
+#define	SC_FPC_EIR	(71 * REGSZ)
+
+#endif /* __ANDROID__ */
 
-__END_DECLS
+#endif /* __LANGUAGE_ASSEMBLY */
 
-#endif /* _ARCH_MIPS_MACHINE_SIGNAL_H_ */
+#endif	/* !_MIPS_SIGNAL_H_ */