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	tarm - plan9port - [fork] Plan 9 from user space
	git clone git://src.adamsgaard.dk/plan9port
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	---
	commit f51bf048784abd642dea4f033bc95acbd4468b6a
	parent 48ca8d21f75b734a15091b77abf5ed4a92be90f2
	Author: rsc <devnull@localhost>
	Date: Tue, 1 Nov 2005 18:35:44 +0000

	arm

	Diffstat:
	M src/Makefile \| 11 ++++++++++-
	A src/libthread/Linux-arm-asm.s \| 53 ++++++++++++++++++++++++++++++
	M src/libthread/Linux.c \| 40 +++++++++++++++++++++++++++++…
	M src/mkhdr \| 2 ++

	4 files changed, 105 insertions(+), 1 deletion(-)
	---
	diff --git a/src/Makefile b/src/Makefile
	t@@ -1,6 +1,15 @@
	../bin/mk: mkmk.sh
	SYSNAME=`uname` export SYSNAME; \
	- OBJTYPE=`uname -m \| sed 's;i.86;386;; s;amd64;x86_64;; s;/.*;;; s; ;;g…
	+ OBJTYPE=`uname -m \| sed ' \
	+ s;i.86;386;; \
	+ s;amd64;x86_64;; \
	+ s;/.*;;; s; ;;g; \
	+ s;armv4l;arm;g; \
	+ s;PowerMacintosh;power;g; \
	+ s;macppc;power;g; \
	+ s;ppc64;power;g; \
	+ s;ppc;power;g; \
	+ '` export OBJTYPE; \
	PATH=/bin:/usr/bin:/usr/local/bin:`pwd`/../bin:$$PATH export PATH; \
	PLAN9=`pwd`/.. export PLAN9; \
	sh -x mkmk.sh
	diff --git a/src/libthread/Linux-arm-asm.s b/src/libthread/Linux-arm-asm.s
	t@@ -0,0 +1,53 @@
	+
	+.globl _tas
	+_tas:
	+ mov r3, #0xCA000000
	+ add r3, r3, #0xFE0000
	+ add r3, r3, #0xBA00
	+ add r3, r3, #0xBE
	+ swp r3, r3, [r0]
	+ mov r0, r3
	+ mov pc, lr
	+
	+.globl getmcontext
	+getmcontext:
	+ /* r0 will be overwritten */
	+ str r1, [r0,#4]!
	+ str r2, [r0,#4]!
	+ str r3, [r0,#4]!
	+ str r4, [r0,#4]!
	+ str r5, [r0,#4]!
	+ str r6, [r0,#4]!
	+ str r7, [r0,#4]!
	+ str r8, [r0,#4]!
	+ str r9, [r0,#4]!
	+ str r10, [r0,#4]!
	+ str r11, [r0,#4]!
	+ str r12, [r0,#4]!
	+ str r13, [r0,#4]!
	+ str r14, [r0,#4]!
	+ /* r15 is pc */
	+ mov r0, #0
	+ mov pc, lr
	+
	+.globl setmcontext
	+setmcontext:
	+ /* r0 will be overwritten */
	+ ldr r1, [r0,#4]!
	+ ldr r2, [r0,#4]!
	+ ldr r3, [r0,#4]!
	+ ldr r4, [r0,#4]!
	+ ldr r5, [r0,#4]!
	+ ldr r6, [r0,#4]!
	+ ldr r7, [r0,#4]!
	+ ldr r8, [r0,#4]!
	+ ldr r9, [r0,#4]!
	+ ldr r10, [r0,#4]!
	+ ldr r11, [r0,#4]!
	+ ldr r12, [r0,#4]!
	+ ldr r13, [r0,#4]!
	+ ldr r14, [r0,#4]!
	+ /* r15 is pc */
	+ mov r0, #1
	+ mov pc, lr
	+
	diff --git a/src/libthread/Linux.c b/src/libthread/Linux.c
	t@@ -436,3 +436,43 @@ _threadpexit(void)
	_exit(0);
	}

	+#ifdef __arm__
	+extern int getmcontext(mcontext_t*);
	+extern int setmcontext(const mcontext_t*);
	+
	+void
	+makecontext(ucontext_t uc, void (fn)(void), int argc, ...)
	+{
	+ int i, *sp;
	+ va_list arg;
	+
	+ sp = (int*)uc->uc_stack.ss_sp+uc->uc_stack.ss_size/4;
	+ va_start(arg, argc);
	+ for(i=0; i<4 && i<argc; i++)
	+ uc->uc_mcontext.gregs[0] = va_arg(arg, uint);
	+ uc->uc_mcontext.gregs[13] = (uint)sp;
	+ uc->uc_mcontext.gregs[14] = (uint)fn;
	+}
	+
	+int
	+getcontext(ucontext_t *uc)
	+{
	+ return getmcontext(&uc->uc_mcontext);
	+}
	+
	+int
	+setcontext(const ucontext_t *uc)
	+{
	+ setmcontext(&uc->uc_mcontext);
	+ return 0; /* not reached */
	+}
	+
	+int
	+swapcontext(ucontext_t oucp, const ucontext_t ucp)
	+{
	+ if(getcontext(oucp) == 0)
	+ setcontext(ucp);
	+ return 0;
	+}
	+#endif
	+
	diff --git a/src/mkhdr b/src/mkhdr
	t@@ -1,9 +1,11 @@
	SYSNAME=`uname`
	+# objtype rules also in Makefile
	OBJTYPE=`uname -m \| sed '
	s;i.86;386;;
	s;amd64;x86_64;;
	s;/.*;;;
	s; ;;g;
	+ s;armv4l;arm;g;
	s;PowerMacintosh;power;g;
	s;macppc;power;g;
	s;ppc64;power;g;