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, 0 insertions, 141 deletions

diff --git a/libc/arch-mips/include/machine/ucontext.h b/libc/arch-mips/include/machine/ucontext.h
deleted file mode 100644
index df3b64b..0000000
--- a/libc/arch-mips/include/machine/ucontext.h
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- * All rights reserved.
- *
- * 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
- *    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.
- *
- * 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
- * SUCH DAMAGE.
- */
-#ifndef _ARCH_MIPS_SYS_UCONTEXT_H_
-#define _ARCH_MIPS_SYS_UCONTEXT_H_
-
-#include <signal.h>
-#include <stdint.h>
-
-__BEGIN_DECLS
-
-/* Technical note:
- *
- * On MIPS, there are differences in the way GLibc and the Linux kernel declare
- * ucontext_t:
- *
- *  - The kernel implements 'uc_mcontext' with a 'struct sigcontext',
- *    while GLibc defines 'mcontext_t' in a binary-compatible way
- *    (same size, same binary layout), but with different field naming/access
- *    convention.
- *
- *    The biggest difference is the naming of the fields. The kernel uses
- *    a 'sc_' prefix (e.g. "sc_gregs[]"), while GLibc does not ("gregs[]").
- *
- *    For maximum portability of existing client code, this header follows
- *    the GLibc convention. Client code, and the C library, should never
- *    try to include <asm/ucontext.h>
- *
- *  Apart from that, all floating point state is stored in uc_mcontext
- *  in the same way, which is much simpler than ARM and x86 schemes for it.
- *  As such, there is no _libc_fpstate.
- *
- *  Reference source files:
- *    $KERNEL/arch/mips/include/asm/sigcontext.h
- *    $KERNEL/arch/mips/include/asm/ucontext.h
- *
- *    $GLIBC/sysdeps/unix/sysv/linux/mips/getcontext.S
- *    $GLIBC/sysdeps/unix/sysv/linux/mips/setcontext.S
- *    $GLIBC/sysdeps/unix/sysv/linux/mips/sys/ucontext.h
- */
-
-/* First, the kernel-compatible version, for reference. */
-typedef struct __kernel_ucontext {
-  unsigned long              uc_flags;
-  struct __kernel_ucontext*  uc_link;
-  stack_t                    uc_stack;
-  struct sigcontext          uc_mcontext;
-  __kernel_sigset_t          uc_sigmask;
-} __kernel_ucontext_t;
-
-/* Second, the GLibc-compatible version */
-
-__extension__ /* Required to build in ANSI C mode */
-typedef unsigned long long greg_t;
-
-#define NGREG   32
-#define NFPREG  32
-
-typedef greg_t  gregset_t[NGREG];
-
-typedef struct fpregset {
-  union {
-    double fp_dregs[NFPREG];
-    struct {
-      float     _fp_fregs;
-      unsigned  _fp_pad;
-    } fp_fregs[NFPREG];
-  } fp_r;
-} fpregset_t;
-
-#ifndef _MIPS_SIM
-#error "_MIPS_SIM should be defined by your Android MIPS toolchain!"
-#endif
-
-#ifndef _OABI32
-#error "_OABI32 should be defined by your Android MIPS toolchain!"
-#endif
-
-#if _MIPS_SIM != _OABI32
-#error "Only _OABI32 is supported on Android MIPS!"
-#endif
-
-typedef struct {
-  unsigned   regmask;
-  unsigned   status;
-  greg_t     pc;
-  gregset_t  gregs;
-  fpregset_t fpregs;
-  unsigned   fp_owned;
-  unsigned   fpc_csr;
-  unsigned   fpc_eir;
-  unsigned   used_math;
-  unsigned   dsp;
-  greg_t     mdhi;
-  greg_t     mdlo;
-  unsigned   hi1;
-  unsigned   lo1;
-  unsigned   hi2;
-  unsigned   lo2;
-  unsigned   hi3;
-  unsigned   lo3;
-} mcontext_t;
-
-typedef struct ucontext {
-  uint32_t          uc_flags;
-  struct ucontext*  uc_link;
-  stack_t           uc_stack;
-  mcontext_t        uc_mcontext;
-  /* Only expose the signals in Bionic's 32-bit sigset_t.
-   * The _unused field is required padding from the kernel. */
-  sigset_t          uc_sigmask;
-  char _unused[sizeof(__kernel_sigset_t) - sizeof(sigset_t)];
-} ucontext_t;
-
-__END_DECLS
-
-#endif /* _ARCH_MIPS_SYS_UCONTEXT_H_ */