aboutsummaryrefslogtreecommitdiffstats
path: root/main/libc0.9.32/0001-libc-add-get-set-swap-make-context-user-context-mani.patch
diff options
context:
space:
mode:
Diffstat (limited to 'main/libc0.9.32/0001-libc-add-get-set-swap-make-context-user-context-mani.patch')
-rw-r--r--main/libc0.9.32/0001-libc-add-get-set-swap-make-context-user-context-mani.patch2550
1 files changed, 0 insertions, 2550 deletions
diff --git a/main/libc0.9.32/0001-libc-add-get-set-swap-make-context-user-context-mani.patch b/main/libc0.9.32/0001-libc-add-get-set-swap-make-context-user-context-mani.patch
deleted file mode 100644
index 98bb707b01..0000000000
--- a/main/libc0.9.32/0001-libc-add-get-set-swap-make-context-user-context-mani.patch
+++ /dev/null
@@ -1,2550 +0,0 @@
-From a8dc90eaaa5e6474beac828558d969b1aafee4af Mon Sep 17 00:00:00 2001
-From: Florian Fainelli <florian@openwrt.org>
-Date: Wed, 9 Jan 2013 16:17:21 +0100
-Subject: [PATCH] libc: add {get,set,swap,make}context user context
- manipulation functions
-
-Add the obsolescent SUSv3 family of user context manipulating functions
-for arm, i386, mips, x86_64.
-
-Signed-off-by: Timon ter Braak <timonterbraak@gmail.com>
-Signed-off-by: Florian Fainelli <florian@openwrt.org>
-Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
-Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
-Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
----
- Rules.mak | 2 +
- extra/Configs/Config.arm | 1 +
- extra/Configs/Config.i386 | 1 +
- extra/Configs/Config.in | 16 ++
- extra/Configs/Config.mips | 1 +
- extra/Configs/Config.x86_64 | 1 +
- include/ucontext.h | 32 +++-
- libc/.gitignore | 1 +
- libc/sysdeps/linux/Makefile.commonarch | 20 +-
- libc/sysdeps/linux/arm/Makefile.arch | 5 +
- libc/sysdeps/linux/arm/getcontext.S | 80 ++++++++
- libc/sysdeps/linux/arm/makecontext.c | 73 +++++++
- libc/sysdeps/linux/arm/setcontext.S | 76 ++++++++
- libc/sysdeps/linux/arm/swapcontext.S | 63 ++++++
- libc/sysdeps/linux/arm/ucontext_i.sym | 30 +++
- libc/sysdeps/linux/i386/Makefile.arch | 4 +
- libc/sysdeps/linux/i386/getcontext.S | 84 ++++++++
- libc/sysdeps/linux/i386/makecontext.S | 123 ++++++++++++
- libc/sysdeps/linux/i386/setcontext.S | 96 ++++++++++
- libc/sysdeps/linux/i386/swapcontext.S | 110 +++++++++++
- libc/sysdeps/linux/i386/ucontext_i.sym | 30 +++
- libc/sysdeps/linux/mips/Makefile.arch | 4 +
- libc/sysdeps/linux/mips/getcontext.S | 148 +++++++++++++++
- libc/sysdeps/linux/mips/kernel_rt_sigframe.h | 10 +
- libc/sysdeps/linux/mips/makecontext.S | 188 ++++++++++++++++++
- libc/sysdeps/linux/mips/setcontext.S | 191 +++++++++++++++++++
- libc/sysdeps/linux/mips/swapcontext.S | 211 +++++++++++++++++++++
- libc/sysdeps/linux/mips/ucontext_i.sym | 52 +++++
- libc/sysdeps/linux/x86_64/Makefile.arch | 5 +
- libc/sysdeps/linux/x86_64/__start_context.S | 49 +++++
- libc/sysdeps/linux/x86_64/getcontext.S | 88 +++++++++
- libc/sysdeps/linux/x86_64/makecontext.c | 121 ++++++++++++
- libc/sysdeps/linux/x86_64/setcontext.S | 103 ++++++++++
- libc/sysdeps/linux/x86_64/swapcontext.S | 121 ++++++++++++
- libc/sysdeps/linux/x86_64/ucontext_i.sym | 37 ++++
- libpthread/nptl/sysdeps/Makefile.commonarch | 3 +-
- .../sysdeps/unix/sysv/linux/Makefile.commonarch | 2 -
- 37 files changed, 2174 insertions(+), 8 deletions(-)
- create mode 100644 libc/.gitignore
- create mode 100644 libc/sysdeps/linux/arm/getcontext.S
- create mode 100644 libc/sysdeps/linux/arm/makecontext.c
- create mode 100644 libc/sysdeps/linux/arm/setcontext.S
- create mode 100644 libc/sysdeps/linux/arm/swapcontext.S
- create mode 100644 libc/sysdeps/linux/arm/ucontext_i.sym
- create mode 100644 libc/sysdeps/linux/i386/getcontext.S
- create mode 100644 libc/sysdeps/linux/i386/makecontext.S
- create mode 100644 libc/sysdeps/linux/i386/setcontext.S
- create mode 100644 libc/sysdeps/linux/i386/swapcontext.S
- create mode 100644 libc/sysdeps/linux/i386/ucontext_i.sym
- create mode 100644 libc/sysdeps/linux/mips/getcontext.S
- create mode 100644 libc/sysdeps/linux/mips/kernel_rt_sigframe.h
- create mode 100644 libc/sysdeps/linux/mips/makecontext.S
- create mode 100644 libc/sysdeps/linux/mips/setcontext.S
- create mode 100644 libc/sysdeps/linux/mips/swapcontext.S
- create mode 100644 libc/sysdeps/linux/mips/ucontext_i.sym
- create mode 100644 libc/sysdeps/linux/x86_64/__start_context.S
- create mode 100644 libc/sysdeps/linux/x86_64/getcontext.S
- create mode 100644 libc/sysdeps/linux/x86_64/makecontext.c
- create mode 100644 libc/sysdeps/linux/x86_64/setcontext.S
- create mode 100644 libc/sysdeps/linux/x86_64/swapcontext.S
- create mode 100644 libc/sysdeps/linux/x86_64/ucontext_i.sym
-
-diff --git a/Rules.mak b/Rules.mak
-index 96871e1..8943fbf 100644
---- a/Rules.mak
-+++ b/Rules.mak
-@@ -813,3 +813,5 @@ SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
- endif
-
- LOCAL_INSTALL_PATH := install_dir
-+
-+PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"
-diff --git a/extra/Configs/Config.arm b/extra/Configs/Config.arm
-index 0bb2971..dc53643 100644
---- a/extra/Configs/Config.arm
-+++ b/extra/Configs/Config.arm
-@@ -11,6 +11,7 @@ config FORCE_OPTIONS_FOR_ARCH
- bool
- default y
- select ARCH_ANY_ENDIAN
-+ select ARCH_HAS_UCONTEXT
-
- config CONFIG_ARM_EABI
- bool "Build for EABI"
-diff --git a/extra/Configs/Config.i386 b/extra/Configs/Config.i386
-index 288aa5e..92cee3b 100644
---- a/extra/Configs/Config.i386
-+++ b/extra/Configs/Config.i386
-@@ -12,6 +12,7 @@ config FORCE_OPTIONS_FOR_ARCH
- default y
- select ARCH_LITTLE_ENDIAN
- select ARCH_HAS_MMU
-+ select ARCH_HAS_UCONTEXT
-
- choice
- prompt "Target x86 Processor Family"
-diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
-index 4bb6812..62bcd9b 100644
---- a/extra/Configs/Config.in
-+++ b/extra/Configs/Config.in
-@@ -261,6 +261,9 @@ config ARCH_HAS_NO_LDSO
- bool
- select ARCH_HAS_NO_SHARED
-
-+config ARCH_HAS_UCONTEXT
-+ bool
-+
- config HAVE_SHARED
- bool "Enable shared libraries"
- depends on !ARCH_HAS_NO_SHARED
-@@ -678,6 +681,19 @@ config UCLIBC_SUSV3_LEGACY
-
- WARNING! ABI incompatibility.
-
-+config UCLIBC_HAS_CONTEXT_FUNCS
-+ bool "Use obsolescent context control functions"
-+ depends on UCLIBC_SUSV3_LEGACY && ARCH_HAS_UCONTEXT
-+ help
-+ Add into library the SuSv3 obsolescent functions used for context
-+ control. The setcontext family allows the implementation in C of
-+ advanced control flow patterns such as iterators, fibers, and
-+ coroutines. They may be viewed as an advanced version of
-+ setjmp/longjmp; whereas the latter allows only a single non-local jump
-+ up the stack, setcontext allows the creation of multiple cooperative
-+ threads of control, each with its own stack.
-+ These functions are: setcontext, getcontext, makecontext, swapcontext.
-+
- config UCLIBC_SUSV3_LEGACY_MACROS
- bool "Enable SuSv3 LEGACY macros"
- help
-diff --git a/extra/Configs/Config.mips b/extra/Configs/Config.mips
-index 063b07c..48e0b64 100644
---- a/extra/Configs/Config.mips
-+++ b/extra/Configs/Config.mips
-@@ -11,6 +11,7 @@ config FORCE_OPTIONS_FOR_ARCH
- bool
- default y
- select ARCH_ANY_ENDIAN
-+ select ARCH_HAS_UCONTEXT
-
- choice
- prompt "Target ABI"
-diff --git a/extra/Configs/Config.x86_64 b/extra/Configs/Config.x86_64
-index 1b28088..4c8c3a9 100644
---- a/extra/Configs/Config.x86_64
-+++ b/extra/Configs/Config.x86_64
-@@ -12,3 +12,4 @@ config FORCE_OPTIONS_FOR_ARCH
- default y
- select ARCH_LITTLE_ENDIAN
- select ARCH_HAS_MMU
-+ select ARCH_HAS_UCONTEXT
-diff --git a/include/ucontext.h b/include/ucontext.h
-index 14a1270..f11db77 100644
---- a/include/ucontext.h
-+++ b/include/ucontext.h
-@@ -15,17 +15,43 @@
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-+/* The System V ABI user-level context switching support functions
-+ are marked obsolescent by SuSv3. */
-+
- #ifndef _UCONTEXT_H
- #define _UCONTEXT_H 1
-
- #include <features.h>
-
-+#ifdef __UCLIBC_HAS_CONTEXT_FUNCS__
-+
- /* Get machine dependent definition of data structures. */
- #include <sys/ucontext.h>
-
--/* The System V ABI user-level context switching support functions
-- * are marked obsolescent by SuSv3, and are not implemented by
-- * uClibc. This header is therefore empty. */
-+__BEGIN_DECLS
-+
-+/* Get user context and store it in variable pointed to by UCP. */
-+extern int getcontext (ucontext_t *__ucp) __THROW;
-+
-+/* Set user context from information of variable pointed to by UCP. */
-+extern int setcontext (const ucontext_t *__ucp) __THROW;
-+
-+/* Save current context in context variable pointed to by OUCP and set
-+ context from variable pointed to by UCP. */
-+extern int swapcontext (ucontext_t *__restrict __oucp,
-+ const ucontext_t *__restrict __ucp) __THROW;
-+
-+/* Manipulate user context UCP to continue with calling functions FUNC
-+ and the ARGC-1 parameters following ARGC when the context is used
-+ the next time in `setcontext' or `swapcontext'.
-+
-+ We cannot say anything about the parameters FUNC takes; `void'
-+ is as good as any other choice. */
-+extern void makecontext (ucontext_t *__ucp, void (*__func) (void),
-+ int __argc, ...) __THROW;
-+
-+__END_DECLS
-
-+#endif
-
- #endif /* ucontext.h */
-diff --git a/libc/.gitignore b/libc/.gitignore
-new file mode 100644
-index 0000000..f4c0305
---- /dev/null
-+++ b/libc/.gitignore
-@@ -0,0 +1 @@
-+ucontext_i.[chs]
-diff --git a/libc/sysdeps/linux/Makefile.commonarch b/libc/sysdeps/linux/Makefile.commonarch
-index c1bc5df..ac89e72 100644
---- a/libc/sysdeps/linux/Makefile.commonarch
-+++ b/libc/sysdeps/linux/Makefile.commonarch
-@@ -37,5 +37,23 @@ headers-y += $(ARCH_HEADERS_OUT)
- headers_clean-y += HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT))
- HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT)):
- $(do_rm) $(ARCH_HEADERS_OUT)
--
- endif
-+
-+CFLAGS-ucontext_i.c = -S
-+
-+$(ARCH_OUT)/ucontext_i.c: $(ARCH_DIR)/ucontext_i.sym
-+ $(do_awk) $(top_srcdir)extra/scripts/gen-as-const.awk $< > $@
-+
-+$(ARCH_OUT)/ucontext_i.s: $(ARCH_OUT)/ucontext_i.c
-+ $(compile.c)
-+
-+$(ARCH_OUT)/ucontext_i.h: $(ARCH_OUT)/ucontext_i.s
-+ $(do_sed) $(PTHREAD_GENERATE_MANGLE) $< > $@
-+
-+pregen-headers-$(UCLIBC_HAS_CONTEXT_FUNCS) += $(ARCH_OUT)/ucontext_i.h
-+
-+headers_clean-$(UCLIBC_HAS_CONTEXT_FUNCS) += \
-+ HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT)/ucontext_i)
-+
-+HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT)/ucontext_i):
-+ $(do_rm) $(addprefix $(ARCH_OUT)/ucontext_i., c h s)
-diff --git a/libc/sysdeps/linux/arm/Makefile.arch b/libc/sysdeps/linux/arm/Makefile.arch
-index 5fc3e54..36d988b 100644
---- a/libc/sysdeps/linux/arm/Makefile.arch
-+++ b/libc/sysdeps/linux/arm/Makefile.arch
-@@ -43,3 +43,8 @@ libc-static-y += $(ARCH_OUT)/aeabi_lcsts.o $(ARCH_OUT)/aeabi_math.o \
- libc-nonshared-y += $(ARCH_OUT)/aeabi_lcsts.os $(ARCH_OUT)/aeabi_math.os \
- $(ARCH_OUT)/aeabi_sighandlers.os $(ARCH_OUT)/aeabi_unwind_cpp_pr1.o
- endif
-+
-+ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y)
-+CSRC += makecontext.c
-+SSRC += getcontext.S setcontext.S swapcontext.S
-+endif
-diff --git a/libc/sysdeps/linux/arm/getcontext.S b/libc/sysdeps/linux/arm/getcontext.S
-new file mode 100644
-index 0000000..a987c52
---- /dev/null
-+++ b/libc/sysdeps/linux/arm/getcontext.S
-@@ -0,0 +1,80 @@
-+/* Copyright (C) 2012 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 "ucontext_i.h"
-+
-+ .syntax unified
-+ .text
-+
-+/* int getcontext (ucontext_t *ucp) */
-+
-+ENTRY(__getcontext)
-+ /* No need to save r0-r3, d0-d7, or d16-d31. */
-+ add r1, r0, #MCONTEXT_ARM_R4
-+ stmia r1, {r4-r11}
-+
-+ /* Save R13 separately as Thumb can't STM it. */
-+ str r13, [r0, #MCONTEXT_ARM_SP]
-+ str r14, [r0, #MCONTEXT_ARM_LR]
-+ /* Return to LR */
-+ str r14, [r0, #MCONTEXT_ARM_PC]
-+ /* Return zero */
-+ mov r2, #0
-+ str r2, [r0, #MCONTEXT_ARM_R0]
-+
-+ /* Save ucontext_t * across the next call. */
-+ mov r4, r0
-+
-+ /* __sigprocmask(SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */
-+ mov r0, #SIG_BLOCK
-+ mov r1, #0
-+ add r2, r4, #UCONTEXT_SIGMASK
-+ bl PLTJMP(sigprocmask)
-+
-+#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
-+# ifdef __VFP_FP__
-+ /* Store the VFP registers. */
-+ /* Following instruction is fstmiax ip!, {d8-d15}. */
-+ stc p11, cr8, [r0], #64
-+ /* Store the floating-point status register. */
-+ /* Following instruction is fmrx r2, fpscr. */
-+ mrc p10, 7, r1, cr1, cr0, 0
-+ str r1, [r0], #4
-+# endif
-+#endif
-+#ifdef __IWMMXT__
-+ /* Save the call-preserved iWMMXt registers. */
-+ /* Following instructions are wstrd wr10, [r0], #8 (etc.) */
-+ stcl p1, cr10, [r0], #8
-+ stcl p1, cr11, [r0], #8
-+ stcl p1, cr12, [r0], #8
-+ stcl p1, cr13, [r0], #8
-+ stcl p1, cr14, [r0], #8
-+ stcl p1, cr15, [r0], #8
-+#endif
-+
-+ /* Restore the clobbered R4 and LR. */
-+ ldr r14, [r4, #MCONTEXT_ARM_LR]
-+ ldr r4, [r4, #MCONTEXT_ARM_R4]
-+
-+ mov r0, #0
-+ DO_RET(r14)
-+
-+END(__getcontext)
-+weak_alias(__getcontext, getcontext)
-diff --git a/libc/sysdeps/linux/arm/makecontext.c b/libc/sysdeps/linux/arm/makecontext.c
-new file mode 100644
-index 0000000..d6ae6f0
---- /dev/null
-+++ b/libc/sysdeps/linux/arm/makecontext.c
-@@ -0,0 +1,73 @@
-+/* Copyright (C) 2012 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 <stdarg.h>
-+#include <ucontext.h>
-+
-+/* Number of arguments that go in registers. */
-+#define NREG_ARGS 4
-+
-+/* Take a context previously prepared via getcontext() and set to
-+ call func() with the given int only args. */
-+void
-+__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
-+{
-+ extern void __startcontext (void);
-+ unsigned long *funcstack;
-+ va_list vl;
-+ unsigned long *regptr;
-+ unsigned int reg;
-+ int misaligned;
-+
-+ /* Start at the top of stack. */
-+ funcstack = (unsigned long *) (ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
-+
-+ /* Ensure the stack stays eight byte aligned. */
-+ misaligned = ((unsigned long) funcstack & 4) != 0;
-+
-+ if ((argc > NREG_ARGS) && (argc & 1) != 0)
-+ misaligned = !misaligned;
-+
-+ if (misaligned)
-+ funcstack -= 1;
-+
-+ va_start (vl, argc);
-+
-+ /* Reserve space for the on-stack arguments. */
-+ if (argc > NREG_ARGS)
-+ funcstack -= (argc - NREG_ARGS);
-+
-+ ucp->uc_mcontext.arm_sp = (unsigned long) funcstack;
-+ ucp->uc_mcontext.arm_pc = (unsigned long) func;
-+
-+ /* Exit to startcontext() with the next context in R4 */
-+ ucp->uc_mcontext.arm_r4 = (unsigned long) ucp->uc_link;
-+ ucp->uc_mcontext.arm_lr = (unsigned long) __startcontext;
-+
-+ /* The first four arguments go into registers. */
-+ regptr = &(ucp->uc_mcontext.arm_r0);
-+
-+ for (reg = 0; (reg < argc) && (reg < NREG_ARGS); reg++)
-+ *regptr++ = va_arg (vl, unsigned long);
-+
-+ /* And the remainder on the stack. */
-+ for (; reg < argc; reg++)
-+ *funcstack++ = va_arg (vl, unsigned long);
-+
-+ va_end (vl);
-+}
-+weak_alias (__makecontext, makecontext)
-diff --git a/libc/sysdeps/linux/arm/setcontext.S b/libc/sysdeps/linux/arm/setcontext.S
-new file mode 100644
-index 0000000..a5c33a0
---- /dev/null
-+++ b/libc/sysdeps/linux/arm/setcontext.S
-@@ -0,0 +1,76 @@
-+/* Copyright (C) 2012 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 "ucontext_i.h"
-+
-+ .syntax unified
-+ .text
-+
-+/* int setcontext (const ucontext_t *ucp) */
-+
-+ENTRY(__setcontext)
-+ mov r4, r0
-+
-+#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
-+# ifdef __VFP_FP__
-+ /* Following instruction is vldmia r0!, {d8-d15}. */
-+ ldc p11, cr8, [r0], #64
-+ /* Restore the floating-point status register. */
-+ ldr r1, [r0], #4
-+ /* Following instruction is fmxr fpscr, r1. */
-+ mcr p10, 7, r1, cr1, cr0, 0
-+# endif
-+#endif
-+
-+#ifdef __IWMMXT__
-+ /* Restore the call-preserved iWMMXt registers. */
-+ /* Following instructions are wldrd wr10, [r0], #8 (etc.) */
-+ ldcl p1, cr10, [r0], #8
-+ ldcl p1, cr11, [r0], #8
-+ ldcl p1, cr12, [r0], #8
-+ ldcl p1, cr13, [r0], #8
-+ ldcl p1, cr14, [r0], #8
-+ ldcl p1, cr15, [r0], #8
-+#endif
-+
-+ /* Now bring back the signal status. */
-+ mov r0, #SIG_SETMASK
-+ add r1, r4, #UCONTEXT_SIGMASK
-+ mov r2, #0
-+ bl PLTJMP(sigprocmask)
-+
-+ /* Loading r0-r3 makes makecontext easier. */
-+ add r14, r4, #MCONTEXT_ARM_R0
-+ ldmia r14, {r0-r11}
-+ ldr r13, [r14, #(MCONTEXT_ARM_SP - MCONTEXT_ARM_R0)]
-+ add r14, r14, #(MCONTEXT_ARM_LR - MCONTEXT_ARM_R0)
-+ ldmia r14, {r14, pc}
-+
-+END(setcontext)
-+weak_alias(__setcontext, setcontext)
-+
-+ /* Called when a makecontext() context returns. Start the
-+ context in R4 or fall through to exit(). */
-+ENTRY(__startcontext)
-+ movs r0, r4
-+ bne PLTJMP(__setcontext)
-+
-+ @ New context was 0 - exit
-+ b PLTJMP(_exit)
-+END(__startcontext)
-diff --git a/libc/sysdeps/linux/arm/swapcontext.S b/libc/sysdeps/linux/arm/swapcontext.S
-new file mode 100644
-index 0000000..ba6e31c
---- /dev/null
-+++ b/libc/sysdeps/linux/arm/swapcontext.S
-@@ -0,0 +1,63 @@
-+/* Copyright (C) 2012 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 "ucontext_i.h"
-+
-+ .syntax unified
-+ .text
-+
-+/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
-+
-+ENTRY(swapcontext)
-+
-+ /* Have getcontext() do most of the work then fix up
-+ LR afterwards. Save R3 to keep the stack aligned. */
-+ push {r0,r1,r3,r14}
-+ cfi_adjust_cfa_offset (16)
-+ cfi_rel_offset (r0,0)
-+ cfi_rel_offset (r1,4)
-+ cfi_rel_offset (r3,8)
-+ cfi_rel_offset (r14,12)
-+
-+ bl __getcontext
-+ mov r4, r0
-+
-+ pop {r0,r1,r3,r14}
-+ cfi_adjust_cfa_offset (-16)
-+ cfi_restore (r0)
-+ cfi_restore (r1)
-+ cfi_restore (r3)
-+ cfi_restore (r14)
-+
-+ /* Exit if getcontext() failed. */
-+ cmp r4, #0
-+ itt ne
-+ movne r0, r4
-+ RETINSTR(ne, r14)
-+
-+ /* Fix up LR and the PC. */
-+ str r13,[r0, #MCONTEXT_ARM_SP]
-+ str r14,[r0, #MCONTEXT_ARM_LR]
-+ str r14,[r0, #MCONTEXT_ARM_PC]
-+
-+ /* And swap using swapcontext(). */
-+ mov r0, r1
-+ b __setcontext
-+
-+END(swapcontext)
-diff --git a/libc/sysdeps/linux/arm/ucontext_i.sym b/libc/sysdeps/linux/arm/ucontext_i.sym
-new file mode 100644
-index 0000000..9650322
---- /dev/null
-+++ b/libc/sysdeps/linux/arm/ucontext_i.sym
-@@ -0,0 +1,30 @@
-+#include <inttypes.h>
-+#include <signal.h>
-+#include <stddef.h>
-+#include <sys/ucontext.h>
-+
-+SIG_BLOCK
-+SIG_SETMASK
-+
-+-- Offsets of the fields in the ucontext_t structure.
-+#define ucontext(member) offsetof (ucontext_t, member)
-+#define mcontext(member) ucontext (uc_mcontext.member)
-+
-+UCONTEXT_FLAGS ucontext (uc_flags)
-+UCONTEXT_LINK ucontext (uc_link)
-+UCONTEXT_STACK ucontext (uc_stack)
-+UCONTEXT_MCONTEXT ucontext (uc_mcontext)
-+UCONTEXT_SIGMASK ucontext (uc_sigmask)
-+
-+UCONTEXT_REGSPACE ucontext (uc_regspace)
-+
-+MCONTEXT_TRAP_NO mcontext (trap_no)
-+MCONTEXT_ERROR_CODE mcontext (error_code)
-+MCONTEXT_OLDMASK mcontext (oldmask)
-+MCONTEXT_ARM_R0 mcontext (arm_r0)
-+MCONTEXT_ARM_R4 mcontext (arm_r4)
-+MCONTEXT_ARM_SP mcontext (arm_sp)
-+MCONTEXT_ARM_LR mcontext (arm_lr)
-+MCONTEXT_ARM_PC mcontext (arm_pc)
-+MCONTEXT_ARM_CPSR mcontext (arm_cpsr)
-+MCONTEXT_FAULT_ADDRESS mcontext (fault_address)
-diff --git a/libc/sysdeps/linux/i386/Makefile.arch b/libc/sysdeps/linux/i386/Makefile.arch
-index a3bf32f..e7fd28e 100644
---- a/libc/sysdeps/linux/i386/Makefile.arch
-+++ b/libc/sysdeps/linux/i386/Makefile.arch
-@@ -18,3 +18,7 @@ endif
- ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y)
- SSRC += vfork.S clone.S
- endif
-+
-+ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y)
-+SSRC += makecontext.S setcontext.S getcontext.S swapcontext.S
-+endif
-diff --git a/libc/sysdeps/linux/i386/getcontext.S b/libc/sysdeps/linux/i386/getcontext.S
-new file mode 100644
-index 0000000..3221b59
---- /dev/null
-+++ b/libc/sysdeps/linux/i386/getcontext.S
-@@ -0,0 +1,84 @@
-+/* Save current context.
-+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
-+
-+ 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 "ucontext_i.h"
-+
-+
-+ENTRY(__getcontext)
-+ /* Load address of the context data structure. */
-+ movl 4(%esp), %eax
-+
-+ /* Return value of getcontext. EAX is the only register whose
-+ value is not preserved. */
-+ movl $0, oEAX(%eax)
-+
-+ /* Save the 32-bit register values and the return address. */
-+ movl %ecx, oECX(%eax)
-+ movl %edx, oEDX(%eax)
-+ movl %edi, oEDI(%eax)
-+ movl %esi, oESI(%eax)
-+ movl %ebp, oEBP(%eax)
-+ movl (%esp), %ecx
-+ movl %ecx, oEIP(%eax)
-+ leal 4(%esp), %ecx /* Exclude the return address. */
-+ movl %ecx, oESP(%eax)
-+ movl %ebx, oEBX(%eax)
-+
-+ /* Save the FS segment register. We don't touch the GS register
-+ since it is used for threads. */
-+ xorl %edx, %edx
-+ movw %fs, %dx
-+ movl %edx, oFS(%eax)
-+
-+ /* We have separate floating-point register content memory on the
-+ stack. We use the __fpregs_mem block in the context. Set the
-+ links up correctly. */
-+ leal oFPREGSMEM(%eax), %ecx
-+ movl %ecx, oFPREGS(%eax)
-+ /* Save the floating-point context. */
-+ fnstenv (%ecx)
-+ /* And load it right back since the processor changes the mask.
-+ Intel thought this opcode to be used in interrupt handlers which
-+ would block all exceptions. */
-+ fldenv (%ecx)
-+
-+ /* Save the current signal mask. */
-+ pushl %ebx
-+ cfi_adjust_cfa_offset (4)
-+ cfi_rel_offset (ebx, 0)
-+ leal oSIGMASK(%eax), %edx
-+ xorl %ecx, %ecx
-+ movl $SIG_BLOCK, %ebx
-+ movl $__NR_sigprocmask, %eax
-+ ENTER_KERNEL
-+ popl %ebx
-+ cfi_adjust_cfa_offset (-4)
-+ cfi_restore (ebx)
-+ cmpl $-4095, %eax /* Check %eax for error. */
-+ jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
-+
-+ /* All done, return 0 for success. */
-+ xorl %eax, %eax
-+L(pseudo_end):
-+ ret
-+PSEUDO_END(__getcontext)
-+
-+weak_alias (__getcontext, getcontext)
-diff --git a/libc/sysdeps/linux/i386/makecontext.S b/libc/sysdeps/linux/i386/makecontext.S
-new file mode 100644
-index 0000000..d12799d
---- /dev/null
-+++ b/libc/sysdeps/linux/i386/makecontext.S
-@@ -0,0 +1,123 @@
-+/* Create new context.
-+ Copyright (C) 2001,2002,2005,2007,2008,2009 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
-+
-+ 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 "ucontext_i.h"
-+
-+
-+ENTRY(__makecontext)
-+ movl 4(%esp), %eax
-+
-+ /* Load the address of the function we are supposed to run. */
-+ movl 8(%esp), %ecx
-+
-+ /* Compute the address of the stack. The information comes from
-+ to us_stack element. */
-+ movl oSS_SP(%eax), %edx
-+ movl %ecx, oEIP(%eax)
-+ addl oSS_SIZE(%eax), %edx
-+
-+ /* Remember the number of parameters for the exit handler since
-+ it has to remove them. We store the number in the EBX register
-+ which the function we will call must preserve. */
-+ movl 12(%esp), %ecx
-+ movl %ecx, oEBX(%eax)
-+
-+ /* Make room on the new stack for the parameters.
-+ Room for the arguments, return address (== L(exitcode)) and
-+ oLINK pointer is needed. One of the pointer sizes is subtracted
-+ after aligning the stack. */
-+ negl %ecx
-+ leal -4(%edx,%ecx,4), %edx
-+ negl %ecx
-+
-+ /* Align the stack. */
-+ andl $0xfffffff0, %edx
-+ subl $4, %edx
-+
-+ /* Store the future stack pointer. */
-+ movl %edx, oESP(%eax)
-+
-+ /* Put the next context on the new stack (from the uc_link
-+ element). */
-+ movl oLINK(%eax), %eax
-+ movl %eax, 4(%edx,%ecx,4)
-+
-+ /* Copy all the parameters. */
-+ jecxz 2f
-+1: movl 12(%esp,%ecx,4), %eax
-+ movl %eax, (%edx,%ecx,4)
-+ decl %ecx
-+ jnz 1b
-+2:
-+
-+ /* If the function we call returns we must continue with the
-+ context which is given in the uc_link element. To do this
-+ set the return address for the function the user provides
-+ to a little bit of helper code which does the magic (see
-+ below). */
-+#ifdef __PIC__
-+ call 1f
-+ cfi_adjust_cfa_offset (4)
-+1: popl %ecx
-+ cfi_adjust_cfa_offset (-4)
-+ addl $L(exitcode)-1b, %ecx
-+ movl %ecx, (%edx)
-+#else
-+ movl $L(exitcode), (%edx)
-+#endif
-+ /* 'makecontext' returns no value. */
-+L(pseudo_end):
-+ ret
-+
-+ /* This is the helper code which gets called if a function which
-+ is registered with 'makecontext' returns. In this case we
-+ have to install the context listed in the uc_link element of
-+ the context 'makecontext' manipulated at the time of the
-+ 'makecontext' call. If the pointer is NULL the process must
-+ terminate. */
-+ cfi_endproc
-+L(exitcode):
-+ /* This removes the parameters passed to the function given to
-+ 'makecontext' from the stack. EBX contains the number of
-+ parameters (see above). */
-+ leal (%esp,%ebx,4), %esp
-+
-+#ifdef __PIC__
-+ call 1f
-+1: popl %ebx
-+ addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
-+#endif
-+ cmpl $0, (%esp) /* Check the next context. */
-+ je 2f /* If it is zero exit. */
-+
-+ call JUMPTARGET(__setcontext)
-+ /* If this returns (which can happen if the syscall fails) we'll
-+ exit the program with the return error value (-1). */
-+
-+ movl %eax, (%esp)
-+2: call HIDDEN_JUMPTARGET(exit)
-+ /* The 'exit' call should never return. In case it does cause
-+ the process to terminate. */
-+ hlt
-+ cfi_startproc
-+END(__makecontext)
-+
-+weak_alias (__makecontext, makecontext)
-diff --git a/libc/sysdeps/linux/i386/setcontext.S b/libc/sysdeps/linux/i386/setcontext.S
-new file mode 100644
-index 0000000..ae953cc
---- /dev/null
-+++ b/libc/sysdeps/linux/i386/setcontext.S
-@@ -0,0 +1,96 @@
-+/* Install given context.
-+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
-+
-+ 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 "ucontext_i.h"
-+
-+
-+ENTRY(__setcontext)
-+ /* Load address of the context data structure. */
-+ movl 4(%esp), %eax
-+
-+ /* Get the current signal mask. Note that we preserve EBX in case
-+ the system call fails and we return from the function with an
-+ error. */
-+ pushl %ebx
-+ cfi_adjust_cfa_offset (4)
-+ xorl %edx, %edx
-+ leal oSIGMASK(%eax), %ecx
-+ movl $SIG_SETMASK, %ebx
-+ cfi_rel_offset (ebx, 0)
-+ movl $__NR_sigprocmask, %eax
-+ ENTER_KERNEL
-+ popl %ebx
-+ cfi_adjust_cfa_offset (-4)
-+ cfi_restore (ebx)
-+ cmpl $-4095, %eax /* Check %eax for error. */
-+ jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
-+
-+ /* EAX was modified, reload it. */
-+ movl 4(%esp), %eax
-+
-+ /* Restore the floating-point context. Not the registers, only the
-+ rest. */
-+ movl oFPREGS(%eax), %ecx
-+ fldenv (%ecx)
-+
-+ /* Restore the FS segment register. We don't touch the GS register
-+ since it is used for threads. */
-+ movl oFS(%eax), %ecx
-+ movw %cx, %fs
-+
-+ /* Fetch the address to return to. */
-+ movl oEIP(%eax), %ecx
-+
-+ /* Load the new stack pointer. */
-+ cfi_def_cfa (eax, 0)
-+ cfi_offset (edi, oEDI)
-+ cfi_offset (esi, oESI)
-+ cfi_offset (ebp, oEBP)
-+ cfi_offset (ebx, oEBX)
-+ cfi_offset (edx, oEDX)
-+ cfi_offset (ecx, oECX)
-+ movl oESP(%eax), %esp
-+
-+ /* Push the return address on the new stack so we can return there. */
-+ pushl %ecx
-+
-+ /* Load the values of all the 32-bit registers (except ESP).
-+ Since we are loading from EAX, it must be last. */
-+ movl oEDI(%eax), %edi
-+ movl oESI(%eax), %esi
-+ movl oEBP(%eax), %ebp
-+ movl oEBX(%eax), %ebx
-+ movl oEDX(%eax), %edx
-+ movl oECX(%eax), %ecx
-+ movl oEAX(%eax), %eax
-+
-+ /* End FDE here, we fall into another context. */
-+ cfi_endproc
-+ cfi_startproc
-+
-+ /* The following 'ret' will pop the address of the code and jump
-+ to it. */
-+
-+L(pseudo_end):
-+ ret
-+PSEUDO_END(__setcontext)
-+
-+weak_alias (__setcontext, setcontext)
-diff --git a/libc/sysdeps/linux/i386/swapcontext.S b/libc/sysdeps/linux/i386/swapcontext.S
-new file mode 100644
-index 0000000..ee5d0e4
---- /dev/null
-+++ b/libc/sysdeps/linux/i386/swapcontext.S
-@@ -0,0 +1,110 @@
-+/* Save current context and install the given one.
-+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
-+
-+ 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 "ucontext_i.h"
-+
-+
-+ENTRY(__swapcontext)
-+ /* Load address of the context data structure we save in. */
-+ movl 4(%esp), %eax
-+
-+ /* Return value of swapcontext. EAX is the only register whose
-+ value is not preserved. */
-+ movl $0, oEAX(%eax)
-+
-+ /* Save the 32-bit register values and the return address. */
-+ movl %ecx, oECX(%eax)
-+ movl %edx, oEDX(%eax)
-+ movl %edi, oEDI(%eax)
-+ movl %esi, oESI(%eax)
-+ movl %ebp, oEBP(%eax)
-+ movl (%esp), %ecx
-+ movl %ecx, oEIP(%eax)
-+ leal 4(%esp), %ecx
-+ movl %ecx, oESP(%eax)
-+ movl %ebx, oEBX(%eax)
-+
-+ /* Save the FS segment register. */
-+ xorl %edx, %edx
-+ movw %fs, %dx
-+ movl %edx, oFS(%eax)
-+
-+ /* We have separate floating-point register content memory on the
-+ stack. We use the __fpregs_mem block in the context. Set the
-+ links up correctly. */
-+ leal oFPREGSMEM(%eax), %ecx
-+ movl %ecx, oFPREGS(%eax)
-+ /* Save the floating-point context. */
-+ fnstenv (%ecx)
-+
-+ /* Load address of the context data structure we have to load. */
-+ movl 8(%esp), %ecx
-+
-+ /* Save the current signal mask and install the new one. */
-+ pushl %ebx
-+ leal oSIGMASK(%eax), %edx
-+ leal oSIGMASK(%ecx), %ecx
-+ movl $SIG_SETMASK, %ebx
-+ movl $__NR_sigprocmask, %eax
-+ ENTER_KERNEL
-+ popl %ebx
-+ cmpl $-4095, %eax /* Check %eax for error. */
-+ jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
-+
-+ /* EAX was modified, reload it. */
-+ movl 8(%esp), %eax
-+
-+ /* Restore the floating-point context. Not the registers, only the
-+ rest. */
-+ movl oFPREGS(%eax), %ecx
-+ fldenv (%ecx)
-+
-+ /* Restore the FS segment register. We don't touch the GS register
-+ since it is used for threads. */
-+ movl oFS(%eax), %edx
-+ movw %dx, %fs
-+
-+ /* Fetch the address to return to. */
-+ movl oEIP(%eax), %ecx
-+
-+ /* Load the new stack pointer. */
-+ movl oESP(%eax), %esp
-+
-+ /* Push the return address on the new stack so we can return there. */
-+ pushl %ecx
-+
-+ /* Load the values of all the 32-bit registers (except ESP).
-+ Since we are loading from EAX, it must be last. */
-+ movl oEDI(%eax), %edi
-+ movl oESI(%eax), %esi
-+ movl oEBP(%eax), %ebp
-+ movl oEBX(%eax), %ebx
-+ movl oEDX(%eax), %edx
-+ movl oECX(%eax), %ecx
-+ movl oEAX(%eax), %eax
-+
-+ /* The following 'ret' will pop the address of the code and jump
-+ to it. */
-+L(pseudo_end):
-+ ret
-+PSEUDO_END(__swapcontext)
-+
-+weak_alias (__swapcontext, swapcontext)
-diff --git a/libc/sysdeps/linux/i386/ucontext_i.sym b/libc/sysdeps/linux/i386/ucontext_i.sym
-new file mode 100644
-index 0000000..b11a550
---- /dev/null
-+++ b/libc/sysdeps/linux/i386/ucontext_i.sym
-@@ -0,0 +1,30 @@
-+#include <stddef.h>
-+#include <signal.h>
-+#include <sys/ucontext.h>
-+
-+--
-+
-+SIG_BLOCK
-+SIG_SETMASK
-+
-+#define ucontext(member) offsetof (ucontext_t, member)
-+#define mcontext(member) ucontext (uc_mcontext.member)
-+#define mreg(reg) mcontext (gregs[REG_##reg])
-+
-+oLINK ucontext (uc_link)
-+oSS_SP ucontext (uc_stack.ss_sp)
-+oSS_SIZE ucontext (uc_stack.ss_size)
-+oGS mreg (GS)
-+oFS mreg (FS)
-+oEDI mreg (EDI)
-+oESI mreg (ESI)
-+oEBP mreg (EBP)
-+oESP mreg (ESP)
-+oEBX mreg (EBX)
-+oEDX mreg (EDX)
-+oECX mreg (ECX)
-+oEAX mreg (EAX)
-+oEIP mreg (EIP)
-+oFPREGS mcontext (fpregs)
-+oSIGMASK ucontext (uc_sigmask)
-+oFPREGSMEM ucontext (__fpregs_mem)
-diff --git a/libc/sysdeps/linux/mips/Makefile.arch b/libc/sysdeps/linux/mips/Makefile.arch
-index fce99f8..00b9331 100644
---- a/libc/sysdeps/linux/mips/Makefile.arch
-+++ b/libc/sysdeps/linux/mips/Makefile.arch
-@@ -27,3 +27,7 @@ ASFLAGS-syscall_error.S += -D_LIBC_REENTRANT
-
- ARCH_HEADERS := sgidefs.h
- # regdef.h
-+
-+ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y)
-+SSRC += makecontext.S setcontext.S getcontext.S swapcontext.S
-+endif
-diff --git a/libc/sysdeps/linux/mips/getcontext.S b/libc/sysdeps/linux/mips/getcontext.S
-new file mode 100644
-index 0000000..c4ad081
---- /dev/null
-+++ b/libc/sysdeps/linux/mips/getcontext.S
-@@ -0,0 +1,148 @@
-+/* Save current context.
-+ Copyright (C) 2009 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
-+
-+ 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 <sys/asm.h>
-+#include <sys/fpregdef.h>
-+#include <sys/regdef.h>
-+
-+#include "ucontext_i.h"
-+
-+/* int getcontext (ucontext_t *ucp) */
-+
-+ .text
-+LOCALSZ = 0
-+MASK = 0x00000000
-+#ifdef __PIC__
-+LOCALSZ = 1 /* save gp */
-+# if _MIPS_SIM != _ABIO32
-+MASK = 0x10000000
-+# endif
-+#endif
-+FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK
-+GPOFF = FRAMESZ - (1 * SZREG)
-+
-+NESTED (__getcontext, FRAMESZ, ra)
-+ .mask MASK, 0
-+ .fmask 0x00000000, 0
-+
-+#ifdef __PIC__
-+ SETUP_GP
-+
-+ move a2, sp
-+# define _SP a2
-+
-+# if _MIPS_SIM != _ABIO32
-+ move a3, gp
-+# define _GP a3
-+# endif
-+
-+ PTR_ADDIU sp, -FRAMESZ
-+ SETUP_GP64 (GPOFF, __getcontext)
-+ SAVE_GP (GPOFF)
-+
-+#else /* ! __PIC__ */
-+# define _SP sp
-+# define _GP gp
-+
-+#endif /* ! __PIC__ */
-+
-+#ifdef PROF
-+ .set noat
-+ move AT, ra
-+ jal _mcount
-+ .set at
-+#endif
-+
-+ /* Store a magic flag. */
-+ li v1, 1
-+ REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
-+
-+ REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
-+#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
-+ REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
-+#endif
-+ REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S ra, MCONTEXT_PC(a0)
-+
-+#ifdef __mips_hard_float
-+# if _MIPS_SIM == _ABI64
-+ s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)
-+
-+# else /* _MIPS_SIM != _ABI64 */
-+ s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)
-+
-+# endif /* _MIPS_SIM != _ABI64 */
-+
-+ cfc1 v1, fcr31
-+ sw v1, MCONTEXT_FPC_CSR(a0)
-+#endif /* __mips_hard_float */
-+
-+/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
-+ li a3, _NSIG8
-+ PTR_ADDU a2, a0, UCONTEXT_SIGMASK
-+ move a1, zero
-+ li a0, SIG_BLOCK
-+
-+ li v0, SYS_ify (rt_sigprocmask)
-+ syscall
-+ bnez a3, 99f
-+
-+#ifdef __PIC__
-+ RESTORE_GP64
-+ PTR_ADDIU sp, FRAMESZ
-+#endif
-+ move v0, zero
-+ jr ra
-+
-+99:
-+#ifdef __PIC__
-+ PTR_LA t9, JUMPTARGET (__syscall_error)
-+ RESTORE_GP64
-+ PTR_ADDIU sp, FRAMESZ
-+ jr t9
-+
-+#else /* ! __PIC__ */
-+
-+ j JUMPTARGET (__syscall_error)
-+#endif /* ! __PIC__ */
-+PSEUDO_END (__getcontext)
-+
-+weak_alias (__getcontext, getcontext)
-diff --git a/libc/sysdeps/linux/mips/kernel_rt_sigframe.h b/libc/sysdeps/linux/mips/kernel_rt_sigframe.h
-new file mode 100644
-index 0000000..77ffaf6
---- /dev/null
-+++ b/libc/sysdeps/linux/mips/kernel_rt_sigframe.h
-@@ -0,0 +1,10 @@
-+/* Linux kernel RT signal frame. */
-+typedef struct kernel_rt_sigframe
-+ {
-+ uint32_t rs_ass[4];
-+ uint32_t rs_code[2];
-+ siginfo_t rs_info;
-+ struct ucontext rs_uc;
-+ uint32_t rs_altcode[8] __attribute__ ((__aligned__ (1 << 7)));
-+ }
-+kernel_rt_sigframe_t;
-diff --git a/libc/sysdeps/linux/mips/makecontext.S b/libc/sysdeps/linux/mips/makecontext.S
-new file mode 100644
-index 0000000..6427339
---- /dev/null
-+++ b/libc/sysdeps/linux/mips/makecontext.S
-@@ -0,0 +1,188 @@
-+/* Modify saved context.
-+ Copyright (C) 2009 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
-+
-+ 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 <sys/asm.h>
-+#include <sys/fpregdef.h>
-+#include <sys/regdef.h>
-+
-+#include "ucontext_i.h"
-+
-+/* int makecontext (ucontext_t *ucp, (void *func) (), int argc, ...) */
-+
-+ .text
-+LOCALSZ = 0
-+ARGSZ = 0
-+MASK = 0x00000000
-+#ifdef __PIC__
-+LOCALSZ = 1 /* save gp */
-+#endif
-+#if _MIPS_SIM != _ABIO32
-+ARGSZ = 5 /* save a3-a7 */
-+# ifdef __PIC__
-+MASK = 0x10000000
-+# endif
-+#endif
-+FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
-+GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
-+#if _MIPS_SIM != _ABIO32
-+A3OFF = FRAMESZ - (5 * SZREG) /* callee-allocated */
-+A4OFF = FRAMESZ - (4 * SZREG)
-+A5OFF = FRAMESZ - (3 * SZREG)
-+A6OFF = FRAMESZ - (2 * SZREG)
-+A7OFF = FRAMESZ - (1 * SZREG)
-+NARGREGS = 8
-+#else
-+A3OFF = FRAMESZ + (3 * SZREG) /* caller-allocated */
-+NARGREGS = 4
-+#endif
-+
-+NESTED (__makecontext, FRAMESZ, ra)
-+ .mask MASK, -(ARGSZ * SZREG)
-+ .fmask 0x00000000, 0
-+
-+98:
-+#ifdef __PIC__
-+ SETUP_GP
-+#endif
-+
-+ PTR_ADDIU sp, -FRAMESZ
-+
-+#ifdef __PIC__
-+ SETUP_GP64 (GPOFF, __makecontext)
-+ SAVE_GP (GPOFF)
-+#endif
-+
-+#ifdef PROF
-+ .set noat
-+ move AT, ra
-+ jal _mcount
-+ .set at
-+#endif
-+
-+ /* Store args to be passed. */
-+ REG_S a3, A3OFF(sp)
-+#if _MIPS_SIM != _ABIO32
-+ REG_S a4, A4OFF(sp)
-+ REG_S a5, A5OFF(sp)
-+ REG_S a6, A6OFF(sp)
-+ REG_S a7, A7OFF(sp)
-+#endif
-+
-+ /* Store a magic flag. */
-+ li v1, 1
-+ REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
-+
-+ /* Set up the stack. */
-+ PTR_L t0, STACK_SP(a0)
-+ PTR_L t2, STACK_SIZE(a0)
-+ PTR_ADDIU t1, sp, A3OFF
-+ PTR_ADDU t0, t2
-+ and t0, ALMASK
-+ blez a2, 2f /* no arguments */
-+
-+ /* Store register arguments. */
-+ PTR_ADDIU t2, a0, MCONTEXT_GREGS + 4 * SZREG
-+ move t3, zero
-+0:
-+ addiu t3, 1
-+ REG_L v1, (t1)
-+ PTR_ADDIU t1, SZREG
-+ REG_S v1, (t2)
-+ PTR_ADDIU t2, SZREG
-+ bgeu t3, a2, 2f /* all done */
-+ bltu t3, NARGREGS, 0b /* next */
-+
-+ /* Make room for stack arguments. */
-+ PTR_SUBU t2, a2, t3
-+ PTR_SLL t2, 3
-+ PTR_SUBU t0, t2
-+ and t0, ALMASK
-+
-+ /* Store stack arguments. */
-+ move t2, t0
-+1:
-+ addiu t3, 1
-+ REG_L v1, (t1)
-+ PTR_ADDIU t1, SZREG
-+ REG_S v1, (t2)
-+ PTR_ADDIU t2, SZREG
-+ bltu t3, a2, 1b /* next */
-+
-+2:
-+#if _MIPS_SIM == _ABIO32
-+ /* Make room for a0-a3 storage. */
-+ PTR_ADDIU t0, -(NARGSAVE * SZREG)
-+#endif
-+ PTR_L v1, UCONTEXT_LINK(a0)
-+#ifdef __PIC__
-+ PTR_ADDIU t9, 99f - 98b
-+#else
-+ PTR_LA t9, 99f
-+#endif
-+ REG_S t0, (29 * SZREG + MCONTEXT_GREGS)(a0) /* sp */
-+ REG_S v1, (16 * SZREG + MCONTEXT_GREGS)(a0) /* s0 */
-+#ifdef __PIC__
-+ REG_S gp, (17 * SZREG + MCONTEXT_GREGS)(a0) /* s1 */
-+#endif
-+ REG_S t9, (31 * SZREG + MCONTEXT_GREGS)(a0) /* ra */
-+ REG_S a1, MCONTEXT_PC(a0)
-+
-+#ifdef __PIC__
-+ RESTORE_GP64
-+ PTR_ADDIU sp, FRAMESZ
-+#endif
-+ jr ra
-+
-+99:
-+#ifdef __PIC__
-+ move gp, s1
-+#endif
-+ move a0, zero
-+ beqz s0, 0f
-+
-+ /* setcontext (ucp) */
-+ move a0, s0
-+#ifdef __PIC__
-+ PTR_LA t9, JUMPTARGET (__setcontext)
-+ jalr t9
-+# if _MIPS_SIM == _ABIO32
-+ move gp, s1
-+# endif
-+#else
-+ jal JUMPTARGET (__setcontext)
-+#endif
-+ move a0, v0
-+
-+0:
-+ /* exit (a0) */
-+#ifdef __PIC__
-+ PTR_LA t9, HIDDEN_JUMPTARGET (exit)
-+ jalr t9
-+#else
-+ jal HIDDEN_JUMPTARGET (exit)
-+#endif
-+
-+ /* You don't exist, you won't feel anything. */
-+1:
-+ lb zero, (zero)
-+ b 1b
-+PSEUDO_END (__makecontext)
-+
-+weak_alias (__makecontext, makecontext)
-diff --git a/libc/sysdeps/linux/mips/setcontext.S b/libc/sysdeps/linux/mips/setcontext.S
-new file mode 100644
-index 0000000..d3cde0e
---- /dev/null
-+++ b/libc/sysdeps/linux/mips/setcontext.S
-@@ -0,0 +1,191 @@
-+/* Set current context.
-+ Copyright (C) 2009 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
-+
-+ 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 <sys/asm.h>
-+#include <sys/fpregdef.h>
-+#include <sys/regdef.h>
-+
-+#include "ucontext_i.h"
-+
-+/* int setcontext (const ucontext_t *ucp) */
-+
-+ .text
-+LOCALSZ = 0
-+ARGSZ = 0
-+MASK = 0x00000000
-+#ifdef __PIC__
-+LOCALSZ = 1 /* save gp */
-+#endif
-+#if _MIPS_SIM != _ABIO32
-+ARGSZ = 1 /* save a0 */
-+# ifdef __PIC__
-+MASK = 0x10000000
-+# endif
-+#endif
-+FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
-+GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
-+#if _MIPS_SIM != _ABIO32
-+A0OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
-+#else
-+A0OFF = FRAMESZ + (0 * SZREG) /* caller-allocated */
-+#endif
-+
-+NESTED (__setcontext, FRAMESZ, ra)
-+ .mask MASK, -(ARGSZ * SZREG)
-+ .fmask 0x00000000, 0
-+
-+#ifdef __PIC__
-+ SETUP_GP
-+#endif
-+
-+ PTR_ADDIU sp, -FRAMESZ
-+
-+#ifdef __PIC__
-+ SETUP_GP64 (GPOFF, __setcontext)
-+ SAVE_GP (GPOFF)
-+#endif
-+
-+#ifdef PROF
-+ .set noat
-+ move AT, ra
-+ jal _mcount
-+ .set at
-+#endif
-+
-+ /* Check for the magic flag. */
-+ li v0, 1
-+ REG_L v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
-+ bne v0, v1, 98f
-+
-+ REG_S a0, A0OFF(sp)
-+
-+/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
-+ li a3, _NSIG8
-+ move a2, zero
-+ PTR_ADDU a1, a0, UCONTEXT_SIGMASK
-+ li a0, SIG_SETMASK
-+
-+ li v0, SYS_ify (rt_sigprocmask)
-+ syscall
-+ bnez a3, 99f
-+
-+ REG_L v0, A0OFF(sp)
-+
-+#ifdef __mips_hard_float
-+# if _MIPS_SIM == _ABI64
-+ l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0)
-+
-+# else /* _MIPS_SIM != _ABI64 */
-+ l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0)
-+
-+# endif /* _MIPS_SIM != _ABI64 */
-+
-+ lw v1, MCONTEXT_FPC_CSR(v0)
-+ ctc1 v1, fcr31
-+#endif /* __mips_hard_float */
-+
-+ /* Note the contents of argument registers will be random
-+ unless makecontext() has been called. */
-+ REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
-+#if _MIPS_SIM != _ABIO32
-+ REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
-+#endif
-+
-+ REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
-+#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
-+ REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
-+#endif
-+ REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L t9, MCONTEXT_PC(v0)
-+
-+ move v0, zero
-+ jr t9
-+
-+98:
-+ /* This is a context obtained from a signal handler.
-+ Perform a full restore by pushing the context
-+ passed onto a simulated signal frame on the stack
-+ and call the signal return syscall as if a signal
-+ handler exited normally. */
-+ PTR_ADDIU sp, -((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
-+
-+ /* Only ucontext is referred to from rt_sigreturn,
-+ copy it. */
-+ PTR_ADDIU t1, sp, RT_SIGFRAME_UCONTEXT
-+ li t3, ((UCONTEXT_SIZE + SZREG - 1) / SZREG) - 1
-+0:
-+ REG_L t2, (a0)
-+ PTR_ADDIU a0, SZREG
-+ REG_S t2, (t1)
-+ PTR_ADDIU t1, SZREG
-+ .set noreorder
-+ bgtz t3, 0b
-+ addiu t3, -1
-+ .set reorder
-+
-+/* rt_sigreturn () -- no arguments, sp points to struct rt_sigframe. */
-+ li v0, SYS_ify (rt_sigreturn)
-+ syscall
-+
-+ /* Restore the stack and fall through to the error
-+ path. Successful rt_sigreturn never returns to
-+ its calling place. */
-+ PTR_ADDIU sp, ((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
-+99:
-+#ifdef __PIC__
-+ PTR_LA t9, JUMPTARGET (__syscall_error)
-+ RESTORE_GP64
-+ PTR_ADDIU sp, FRAMESZ
-+ jr t9
-+
-+#else /* ! __PIC__ */
-+
-+ j JUMPTARGET (__syscall_error)
-+#endif /* ! __PIC__ */
-+PSEUDO_END (__setcontext)
-+
-+weak_alias (__setcontext, setcontext)
-diff --git a/libc/sysdeps/linux/mips/swapcontext.S b/libc/sysdeps/linux/mips/swapcontext.S
-new file mode 100644
-index 0000000..c7ac19b
---- /dev/null
-+++ b/libc/sysdeps/linux/mips/swapcontext.S
-@@ -0,0 +1,211 @@
-+/* Save and set current context.
-+ Copyright (C) 2009 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
-+
-+ 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 <sys/asm.h>
-+#include <sys/fpregdef.h>
-+#include <sys/regdef.h>
-+
-+#include "ucontext_i.h"
-+
-+/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
-+
-+ .text
-+LOCALSZ = 0
-+ARGSZ = 0
-+MASK = 0x00000000
-+#ifdef __PIC__
-+LOCALSZ = 1 /* save gp */
-+#endif
-+#if _MIPS_SIM != _ABIO32
-+ARGSZ = 1 /* save a1 */
-+# ifdef __PIC__
-+MASK = 0x10000000
-+# endif
-+#endif
-+FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
-+GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
-+#if _MIPS_SIM != _ABIO32
-+A1OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */
-+#else
-+A1OFF = FRAMESZ + (1 * SZREG) /* caller-allocated */
-+#endif
-+
-+NESTED (__swapcontext, FRAMESZ, ra)
-+ .mask MASK, -(ARGSZ * SZREG)
-+ .fmask 0x00000000, 0
-+
-+#ifdef __PIC__
-+ SETUP_GP
-+
-+ move a2, sp
-+# define _SP a2
-+
-+# if _MIPS_SIM != _ABIO32
-+ move a3, gp
-+# define _GP a3
-+# endif
-+
-+ PTR_ADDIU sp, -FRAMESZ
-+ SETUP_GP64 (GPOFF, __swapcontext)
-+ SAVE_GP (GPOFF)
-+
-+#else /* ! __PIC__ */
-+# define _SP sp
-+# define _GP gp
-+
-+#endif /* ! __PIC__ */
-+
-+#ifdef PROF
-+ .set noat
-+ move AT, ra
-+ jal _mcount
-+ .set at
-+#endif
-+
-+ /* Store a magic flag. */
-+ li v1, 1
-+ REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */
-+
-+ REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
-+#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
-+ REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
-+#endif
-+ REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
-+ REG_S ra, MCONTEXT_PC(a0)
-+
-+#ifdef __mips_hard_float
-+# if _MIPS_SIM == _ABI64
-+ s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)
-+
-+# else /* _MIPS_SIM != _ABI64 */
-+ s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
-+ s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)
-+
-+# endif /* _MIPS_SIM != _ABI64 */
-+
-+ cfc1 v1, fcr31
-+ sw v1, MCONTEXT_FPC_CSR(a0)
-+#endif /* __mips_hard_float */
-+
-+ REG_S a1, A1OFF(sp)
-+
-+/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
-+ li a3, _NSIG8
-+ PTR_ADDU a2, a0, UCONTEXT_SIGMASK
-+ PTR_ADDU a1, a1, UCONTEXT_SIGMASK
-+ li a0, SIG_SETMASK
-+
-+ li v0, SYS_ify (rt_sigprocmask)
-+ syscall
-+ bnez a3, 99f
-+
-+ REG_L v0, A1OFF(sp)
-+
-+#ifdef __mips_hard_float
-+# if _MIPS_SIM == _ABI64
-+ l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0)
-+
-+# else /* _MIPS_SIM != _ABI64 */
-+ l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
-+ l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0)
-+
-+# endif /* _MIPS_SIM != _ABI64 */
-+
-+ lw v1, MCONTEXT_FPC_CSR(v0)
-+ ctc1 v1, fcr31
-+#endif /* __mips_hard_float */
-+
-+ /* Note the contents of argument registers will be random
-+ unless makecontext() has been called. */
-+ REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
-+#if _MIPS_SIM != _ABIO32
-+ REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
-+#endif
-+
-+ REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
-+#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
-+ REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
-+#endif
-+ REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
-+ REG_L t9, MCONTEXT_PC(v0)
-+
-+ move v0, zero
-+ jr t9
-+
-+99:
-+#ifdef __PIC__
-+ PTR_LA t9, JUMPTARGET (__syscall_error)
-+ RESTORE_GP64
-+ PTR_ADDIU sp, FRAMESZ
-+ jr t9
-+
-+#else /* ! __PIC__ */
-+
-+ j JUMPTARGET (__syscall_error)
-+#endif /* ! __PIC__ */
-+PSEUDO_END (__swapcontext)
-+
-+weak_alias (__swapcontext, swapcontext)
-diff --git a/libc/sysdeps/linux/mips/ucontext_i.sym b/libc/sysdeps/linux/mips/ucontext_i.sym
-new file mode 100644
-index 0000000..f14b886
---- /dev/null
-+++ b/libc/sysdeps/linux/mips/ucontext_i.sym
-@@ -0,0 +1,52 @@
-+#include <inttypes.h>
-+#include <signal.h>
-+#include <stddef.h>
-+#include <sys/ucontext.h>
-+
-+#include <kernel_rt_sigframe.h>
-+
-+-- Constants used by the rt_sigprocmask call.
-+
-+SIG_BLOCK
-+SIG_SETMASK
-+
-+_NSIG8 (_NSIG / 8)
-+
-+-- Offsets of the fields in the kernel rt_sigframe_t structure.
-+#define rt_sigframe(member) offsetof (kernel_rt_sigframe_t, member)
-+
-+RT_SIGFRAME_UCONTEXT rt_sigframe (rs_uc)
-+
-+RT_SIGFRAME_SIZE sizeof (kernel_rt_sigframe_t)
-+
-+-- Offsets of the fields in the ucontext_t structure.
-+#define ucontext(member) offsetof (ucontext_t, member)
-+#define stack(member) ucontext (uc_stack.member)
-+#define mcontext(member) ucontext (uc_mcontext.member)
-+
-+UCONTEXT_FLAGS ucontext (uc_flags)
-+UCONTEXT_LINK ucontext (uc_link)
-+UCONTEXT_STACK ucontext (uc_stack)
-+UCONTEXT_MCONTEXT ucontext (uc_mcontext)
-+UCONTEXT_SIGMASK ucontext (uc_sigmask)
-+
-+STACK_SP stack (ss_sp)
-+STACK_SIZE stack (ss_size)
-+STACK_FLAGS stack (ss_flags)
-+
-+MCONTEXT_GREGS mcontext (gregs)
-+MCONTEXT_FPREGS mcontext (fpregs)
-+MCONTEXT_MDHI mcontext (mdhi)
-+MCONTEXT_HI1 mcontext (hi1)
-+MCONTEXT_HI2 mcontext (hi2)
-+MCONTEXT_HI3 mcontext (hi3)
-+MCONTEXT_MDLO mcontext (mdlo)
-+MCONTEXT_LO1 mcontext (lo1)
-+MCONTEXT_LO2 mcontext (lo2)
-+MCONTEXT_LO3 mcontext (lo3)
-+MCONTEXT_PC mcontext (pc)
-+MCONTEXT_FPC_CSR mcontext (fpc_csr)
-+MCONTEXT_USED_MATH mcontext (used_math)
-+MCONTEXT_DSP mcontext (dsp)
-+
-+UCONTEXT_SIZE sizeof (ucontext_t)
-diff --git a/libc/sysdeps/linux/x86_64/Makefile.arch b/libc/sysdeps/linux/x86_64/Makefile.arch
-index 7491d92..93b8259 100644
---- a/libc/sysdeps/linux/x86_64/Makefile.arch
-+++ b/libc/sysdeps/linux/x86_64/Makefile.arch
-@@ -20,3 +20,8 @@ ifeq ($(UCLIBC_HAS_TLS),y)
- SSRC += sched_getcpu.S
- endif
- endif
-+
-+ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y)
-+CSRC += makecontext.c
-+SSRC += setcontext.S getcontext.S swapcontext.S __start_context.S
-+endif
-diff --git a/libc/sysdeps/linux/x86_64/__start_context.S b/libc/sysdeps/linux/x86_64/__start_context.S
-new file mode 100644
-index 0000000..9f2ee23
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/__start_context.S
-@@ -0,0 +1,49 @@
-+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Andreas Jaeger <aj@suse.de>, 2002.
-+
-+ 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>
-+
-+/* This is the helper code which gets called if a function which is
-+ registered with 'makecontext' returns. In this case we have to
-+ install the context listed in the uc_link element of the context
-+ 'makecontext' manipulated at the time of the 'makecontext' call.
-+ If the pointer is NULL the process must terminate. */
-+
-+
-+ENTRY(__start_context)
-+ /* This removes the parameters passed to the function given to
-+ 'makecontext' from the stack. RBX contains the address
-+ on the stack pointer for the next context. */
-+ movq %rbx, %rsp
-+
-+ popq %rdi /* This is the next context. */
-+ cfi_adjust_cfa_offset(-8)
-+ testq %rdi, %rdi
-+ je 2f /* If it is zero exit. */
-+
-+ call JUMPTARGET(__setcontext)
-+ /* If this returns (which can happen if the syscall fails) we'll
-+ exit the program with the return error value (-1). */
-+ movq %rax,%rdi
-+
-+2:
-+ call HIDDEN_JUMPTARGET(exit)
-+ /* The 'exit' call should never return. In case it does cause
-+ the process to terminate. */
-+ hlt
-+END(__start_context)
-diff --git a/libc/sysdeps/linux/x86_64/getcontext.S b/libc/sysdeps/linux/x86_64/getcontext.S
-new file mode 100644
-index 0000000..dcebc4f
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/getcontext.S
-@@ -0,0 +1,88 @@
-+/* Save current context.
-+ Copyright (C) 2002-2012 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Andreas Jaeger <aj@suse.de>, 2002.
-+
-+ 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 "ucontext_i.h"
-+
-+/* int __getcontext (ucontext_t *ucp)
-+
-+ Saves the machine context in UCP such that when it is activated,
-+ it appears as if __getcontext() returned again.
-+
-+ This implementation is intended to be used for *synchronous* context
-+ switches only. Therefore, it does not have to save anything
-+ other than the PRESERVED state. */
-+
-+
-+ENTRY(__getcontext)
-+ /* Save the preserved registers, the registers used for passing
-+ args, and the return address. */
-+ movq %rbx, oRBX(%rdi)
-+ movq %rbp, oRBP(%rdi)
-+ movq %r12, oR12(%rdi)
-+ movq %r13, oR13(%rdi)
-+ movq %r14, oR14(%rdi)
-+ movq %r15, oR15(%rdi)
-+
-+ movq %rdi, oRDI(%rdi)
-+ movq %rsi, oRSI(%rdi)
-+ movq %rdx, oRDX(%rdi)
-+ movq %rcx, oRCX(%rdi)
-+ movq %r8, oR8(%rdi)
-+ movq %r9, oR9(%rdi)
-+
-+ movq (%rsp), %rcx
-+ movq %rcx, oRIP(%rdi)
-+ leaq 8(%rsp), %rcx /* Exclude the return address. */
-+ movq %rcx, oRSP(%rdi)
-+
-+ /* We have separate floating-point register content memory on the
-+ stack. We use the __fpregs_mem block in the context. Set the
-+ links up correctly. */
-+
-+ leaq oFPREGSMEM(%rdi), %rcx
-+ movq %rcx, oFPREGS(%rdi)
-+ /* Save the floating-point environment. */
-+ fnstenv (%rcx)
-+ fldenv (%rcx)
-+ stmxcsr oMXCSR(%rdi)
-+
-+ /* Save the current signal mask with
-+ rt_sigprocmask (SIG_BLOCK, NULL, set,_NSIG/8). */
-+ leaq oSIGMASK(%rdi), %rdx
-+ xorl %esi,%esi
-+#if SIG_BLOCK == 0
-+ xorl %edi, %edi
-+#else
-+ movl $SIG_BLOCK, %edi
-+#endif
-+ movl $_NSIG8,%r10d
-+ movl $__NR_rt_sigprocmask, %eax
-+ syscall
-+ cmpq $-4095, %rax /* Check %rax for error. */
-+ jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
-+
-+ /* All done, return 0 for success. */
-+ xorl %eax, %eax
-+L(pseudo_end):
-+ ret
-+PSEUDO_END(__getcontext)
-+
-+weak_alias (__getcontext, getcontext)
-diff --git a/libc/sysdeps/linux/x86_64/makecontext.c b/libc/sysdeps/linux/x86_64/makecontext.c
-new file mode 100644
-index 0000000..5473031
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/makecontext.c
-@@ -0,0 +1,121 @@
-+/* Create new context.
-+ Copyright (C) 2002, 2004, 2005, 2008 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Andreas Jaeger <aj@suse.de>, 2002.
-+
-+ 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 <stdarg.h>
-+#include <stdint.h>
-+#include <ucontext.h>
-+
-+#include "ucontext_i.h"
-+
-+/* This implementation can handle any ARGC value but only
-+ normal integer parameters.
-+ makecontext sets up a stack and the registers for the
-+ user context. The stack looks like this:
-+ +-----------------------+
-+ | next context |
-+ +-----------------------+
-+ | parameter 7-n |
-+ +-----------------------+
-+ | trampoline address |
-+ %rsp -> +-----------------------+
-+
-+ The registers are set up like this:
-+ %rdi,%rsi,%rdx,%rcx,%r8,%r9: parameter 1 to 6
-+ %rbx : address of next context
-+ %rsp : stack pointer.
-+*/
-+
-+/* XXX: This implementation currently only handles integer arguments.
-+ To handle long int and pointer arguments the va_arg arguments needs
-+ to be changed to long and also the stdlib/tst-setcontext.c file needs
-+ to be changed to pass long arguments to makecontext. */
-+
-+
-+void
-+__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
-+{
-+ extern void __start_context (void);
-+ greg_t *sp;
-+ unsigned int idx_uc_link;
-+ va_list ap;
-+ int i;
-+
-+ /* Generate room on stack for parameter if needed and uc_link. */
-+ sp = (greg_t *) ((uintptr_t) ucp->uc_stack.ss_sp
-+ + ucp->uc_stack.ss_size);
-+ sp -= (argc > 6 ? argc - 6 : 0) + 1;
-+ /* Align stack and make space for trampoline address. */
-+ sp = (greg_t *) ((((uintptr_t) sp) & -16L) - 8);
-+
-+ idx_uc_link = (argc > 6 ? argc - 6 : 0) + 1;
-+
-+ /* Setup context ucp. */
-+ /* Address to jump to. */
-+ ucp->uc_mcontext.gregs[REG_RIP] = (uintptr_t) func;
-+ /* Setup rbx.*/
-+ ucp->uc_mcontext.gregs[REG_RBX] = (uintptr_t) &sp[idx_uc_link];
-+ ucp->uc_mcontext.gregs[REG_RSP] = (uintptr_t) sp;
-+
-+ /* Setup stack. */
-+ sp[0] = (uintptr_t) &__start_context;
-+ sp[idx_uc_link] = (uintptr_t) ucp->uc_link;
-+
-+ va_start (ap, argc);
-+ /* Handle arguments.
-+
-+ The standard says the parameters must all be int values. This is
-+ an historic accident and would be done differently today. For
-+ x86-64 all integer values are passed as 64-bit values and
-+ therefore extending the API to copy 64-bit values instead of
-+ 32-bit ints makes sense. It does not break existing
-+ functionality and it does not violate the standard which says
-+ that passing non-int values means undefined behavior. */
-+ for (i = 0; i < argc; ++i)
-+ switch (i)
-+ {
-+ case 0:
-+ ucp->uc_mcontext.gregs[REG_RDI] = va_arg (ap, greg_t);
-+ break;
-+ case 1:
-+ ucp->uc_mcontext.gregs[REG_RSI] = va_arg (ap, greg_t);
-+ break;
-+ case 2:
-+ ucp->uc_mcontext.gregs[REG_RDX] = va_arg (ap, greg_t);
-+ break;
-+ case 3:
-+ ucp->uc_mcontext.gregs[REG_RCX] = va_arg (ap, greg_t);
-+ break;
-+ case 4:
-+ ucp->uc_mcontext.gregs[REG_R8] = va_arg (ap, greg_t);
-+ break;
-+ case 5:
-+ ucp->uc_mcontext.gregs[REG_R9] = va_arg (ap, greg_t);
-+ break;
-+ default:
-+ /* Put value on stack. */
-+ sp[i - 5] = va_arg (ap, greg_t);
-+ break;
-+ }
-+ va_end (ap);
-+
-+}
-+
-+
-+weak_alias (__makecontext, makecontext)
-diff --git a/libc/sysdeps/linux/x86_64/setcontext.S b/libc/sysdeps/linux/x86_64/setcontext.S
-new file mode 100644
-index 0000000..561ab9f
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/setcontext.S
-@@ -0,0 +1,103 @@
-+/* Install given context.
-+ Copyright (C) 2002-2012 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Andreas Jaeger <aj@suse.de>, 2002.
-+
-+ 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 "ucontext_i.h"
-+
-+
-+/* int __setcontext (const ucontext_t *ucp)
-+
-+ Restores the machine context in UCP and thereby resumes execution
-+ in that context.
-+
-+ This implementation is intended to be used for *synchronous* context
-+ switches only. Therefore, it does not have to restore anything
-+ other than the PRESERVED state. */
-+
-+ENTRY(__setcontext)
-+ /* Save argument since syscall will destroy it. */
-+ pushq %rdi
-+ cfi_adjust_cfa_offset(8)
-+
-+ /* Set the signal mask with
-+ rt_sigprocmask (SIG_SETMASK, mask, NULL, _NSIG/8). */
-+ leaq oSIGMASK(%rdi), %rsi
-+ xorl %edx, %edx
-+ movl $SIG_SETMASK, %edi
-+ movl $_NSIG8,%r10d
-+ movl $__NR_rt_sigprocmask, %eax
-+ syscall
-+ popq %rdi /* Reload %rdi, adjust stack. */
-+ cfi_adjust_cfa_offset(-8)
-+ cmpq $-4095, %rax /* Check %rax for error. */
-+ jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
-+
-+ /* Restore the floating-point context. Not the registers, only the
-+ rest. */
-+ movq oFPREGS(%rdi), %rcx
-+ fldenv (%rcx)
-+ ldmxcsr oMXCSR(%rdi)
-+
-+
-+ /* Load the new stack pointer, the preserved registers and
-+ registers used for passing args. */
-+ cfi_def_cfa(%rdi, 0)
-+ cfi_offset(%rbx,oRBX)
-+ cfi_offset(%rbp,oRBP)
-+ cfi_offset(%r12,oR12)
-+ cfi_offset(%r13,oR13)
-+ cfi_offset(%r14,oR14)
-+ cfi_offset(%r15,oR15)
-+ cfi_offset(%rsp,oRSP)
-+ cfi_offset(%rip,oRIP)
-+
-+ movq oRSP(%rdi), %rsp
-+ movq oRBX(%rdi), %rbx
-+ movq oRBP(%rdi), %rbp
-+ movq oR12(%rdi), %r12
-+ movq oR13(%rdi), %r13
-+ movq oR14(%rdi), %r14
-+ movq oR15(%rdi), %r15
-+
-+ /* The following ret should return to the address set with
-+ getcontext. Therefore push the address on the stack. */
-+ movq oRIP(%rdi), %rcx
-+ pushq %rcx
-+
-+ movq oRSI(%rdi), %rsi
-+ movq oRDX(%rdi), %rdx
-+ movq oRCX(%rdi), %rcx
-+ movq oR8(%rdi), %r8
-+ movq oR9(%rdi), %r9
-+
-+ /* Setup finally %rdi. */
-+ movq oRDI(%rdi), %rdi
-+
-+ /* End FDE here, we fall into another context. */
-+ cfi_endproc
-+ cfi_startproc
-+
-+ /* Clear rax to indicate success. */
-+ xorl %eax, %eax
-+L(pseudo_end):
-+ ret
-+PSEUDO_END(__setcontext)
-+
-+weak_alias (__setcontext, setcontext)
-diff --git a/libc/sysdeps/linux/x86_64/swapcontext.S b/libc/sysdeps/linux/x86_64/swapcontext.S
-new file mode 100644
-index 0000000..6d2ebb8
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/swapcontext.S
-@@ -0,0 +1,121 @@
-+/* Save current context and install the given one.
-+ Copyright (C) 2002-2012 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+ Contributed by Andreas Jaeger <aj@suse.de>, 2002.
-+
-+ 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 "ucontext_i.h"
-+
-+
-+/* int __swapcontext (ucontext_t *oucp, const ucontext_t *ucp);
-+
-+ Saves the machine context in oucp such that when it is activated,
-+ it appears as if __swapcontextt() returned again, restores the
-+ machine context in ucp and thereby resumes execution in that
-+ context.
-+
-+ This implementation is intended to be used for *synchronous* context
-+ switches only. Therefore, it does not have to save anything
-+ other than the PRESERVED state. */
-+
-+ENTRY(__swapcontext)
-+ /* Save the preserved registers, the registers used for passing args,
-+ and the return address. */
-+ movq %rbx, oRBX(%rdi)
-+ movq %rbp, oRBP(%rdi)
-+ movq %r12, oR12(%rdi)
-+ movq %r13, oR13(%rdi)
-+ movq %r14, oR14(%rdi)
-+ movq %r15, oR15(%rdi)
-+
-+ movq %rdi, oRDI(%rdi)
-+ movq %rsi, oRSI(%rdi)
-+ movq %rdx, oRDX(%rdi)
-+ movq %rcx, oRCX(%rdi)
-+ movq %r8, oR8(%rdi)
-+ movq %r9, oR9(%rdi)
-+
-+ movq (%rsp), %rcx
-+ movq %rcx, oRIP(%rdi)
-+ leaq 8(%rsp), %rcx /* Exclude the return address. */
-+ movq %rcx, oRSP(%rdi)
-+
-+ /* We have separate floating-point register content memory on the
-+ stack. We use the __fpregs_mem block in the context. Set the
-+ links up correctly. */
-+ leaq oFPREGSMEM(%rdi), %rcx
-+ movq %rcx, oFPREGS(%rdi)
-+ /* Save the floating-point environment. */
-+ fnstenv (%rcx)
-+ stmxcsr oMXCSR(%rdi)
-+
-+
-+ /* The syscall destroys some registers, save them. */
-+ movq %rsi, %r12
-+
-+ /* Save the current signal mask and install the new one with
-+ rt_sigprocmask (SIG_BLOCK, newset, oldset,_NSIG/8). */
-+ leaq oSIGMASK(%rdi), %rdx
-+ leaq oSIGMASK(%rsi), %rsi
-+ movl $SIG_SETMASK, %edi
-+ movl $_NSIG8,%r10d
-+ movl $__NR_rt_sigprocmask, %eax
-+ syscall
-+ cmpq $-4095, %rax /* Check %rax for error. */
-+ jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
-+
-+ /* Restore destroyed registers. */
-+ movq %r12, %rsi
-+
-+ /* Restore the floating-point context. Not the registers, only the
-+ rest. */
-+ movq oFPREGS(%rsi), %rcx
-+ fldenv (%rcx)
-+ ldmxcsr oMXCSR(%rsi)
-+
-+ /* Load the new stack pointer and the preserved registers. */
-+ movq oRSP(%rsi), %rsp
-+ movq oRBX(%rsi), %rbx
-+ movq oRBP(%rsi), %rbp
-+ movq oR12(%rsi), %r12
-+ movq oR13(%rsi), %r13
-+ movq oR14(%rsi), %r14
-+ movq oR15(%rsi), %r15
-+
-+ /* The following ret should return to the address set with
-+ getcontext. Therefore push the address on the stack. */
-+ movq oRIP(%rsi), %rcx
-+ pushq %rcx
-+
-+ /* Setup registers used for passing args. */
-+ movq oRDI(%rsi), %rdi
-+ movq oRDX(%rsi), %rdx
-+ movq oRCX(%rsi), %rcx
-+ movq oR8(%rsi), %r8
-+ movq oR9(%rsi), %r9
-+
-+ /* Setup finally %rsi. */
-+ movq oRSI(%rsi), %rsi
-+
-+ /* Clear rax to indicate success. */
-+ xorl %eax, %eax
-+L(pseudo_end):
-+ ret
-+PSEUDO_END(__swapcontext)
-+
-+weak_alias (__swapcontext, swapcontext)
-diff --git a/libc/sysdeps/linux/x86_64/ucontext_i.sym b/libc/sysdeps/linux/x86_64/ucontext_i.sym
-new file mode 100644
-index 0000000..af3e0e5
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/ucontext_i.sym
-@@ -0,0 +1,37 @@
-+#include <stddef.h>
-+#include <signal.h>
-+#include <sys/ucontext.h>
-+
-+--
-+
-+SIG_BLOCK
-+SIG_SETMASK
-+
-+_NSIG8 (_NSIG / 8)
-+
-+#define ucontext(member) offsetof (ucontext_t, member)
-+#define mcontext(member) ucontext (uc_mcontext.member)
-+#define mreg(reg) mcontext (gregs[REG_##reg])
-+
-+oRBP mreg (RBP)
-+oRSP mreg (RSP)
-+oRBX mreg (RBX)
-+oR8 mreg (R8)
-+oR9 mreg (R9)
-+oR10 mreg (R10)
-+oR11 mreg (R11)
-+oR12 mreg (R12)
-+oR13 mreg (R13)
-+oR14 mreg (R14)
-+oR15 mreg (R15)
-+oRDI mreg (RDI)
-+oRSI mreg (RSI)
-+oRDX mreg (RDX)
-+oRAX mreg (RAX)
-+oRCX mreg (RCX)
-+oRIP mreg (RIP)
-+oEFL mreg (EFL)
-+oFPREGS mcontext (fpregs)
-+oSIGMASK ucontext (uc_sigmask)
-+oFPREGSMEM ucontext (__fpregs_mem)
-+oMXCSR ucontext (__fpregs_mem.mxcsr)
-diff --git a/libpthread/nptl/sysdeps/Makefile.commonarch b/libpthread/nptl/sysdeps/Makefile.commonarch
-index 0c19216..8f5d61d 100644
---- a/libpthread/nptl/sysdeps/Makefile.commonarch
-+++ b/libpthread/nptl/sysdeps/Makefile.commonarch
-@@ -47,9 +47,8 @@ $(libpthread_arch_OUT)/gen_tcb-offsets.c: $(libpthread_arch_DIR)/tcb-offsets.sym
- $(libpthread_arch_OUT)/gen_tcb-offsets.s: $(libpthread_arch_OUT)/gen_tcb-offsets.c | headers
- $(compile.c)
- libpthread-generated-y += $(libpthread_arch_OUT)/gen_tcb-offsets.s
--PTHREAD_TCB_OFFSET_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"
- $(libpthread_arch_OUT)/tcb-offsets.h: $(libpthread_arch_OUT)/gen_tcb-offsets.s
-- $(do_sed) $(PTHREAD_TCB_OFFSET_MANGLE) $< > $@
-+ $(do_sed) $(PTHREAD_GENERATE_MANGLE) $< > $@
- @if test ! -s $@ ; then rm -f $@ ; false ; fi
-
- pregen-headers-$(UCLIBC_HAS_THREADS_NATIVE) += $(libpthread_arch_OUT)/tcb-offsets.h
-diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.commonarch b/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.commonarch
-index 477fb1a..3372214 100644
---- a/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.commonarch
-+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.commonarch
-@@ -177,8 +177,6 @@ CFLAGS-gen_pthread-pi-defines.c = -S
- CFLAGS-gen_structsem.c = -S
- CFLAGS-gen_unwindbuf.c = -S
-
--PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"
--
- PTHREAD_LINUX_SYM := $(notdir $(wildcard $(libpthread_linux_DIR)/*.sym))
- PTHREAD_LINUX_SYM_C := $(addprefix $(libpthread_linux_OUT)/gen_,$(PTHREAD_LINUX_SYM:.sym=.c))
- PTHREAD_LINUX_SYM_S := $(PTHREAD_LINUX_SYM_C:.c=.s)
---
-1.8.4
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 04:13:57 +0000