From f81e44a0d96c88e052e51982f9fdd6fe0a212b46 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 14 Jun 2018 14:26:30 -0400
Subject: add m68k port

three ABIs are supported: the default with 68881 80-bit fpu format and
results returned in floating point registers, softfloat-only with the
same format, and coldfire fpu with IEEE single/double only. only the
first is tested at all, and only under qemu which has fpu emulation
bugs.

basic functionality smoke tests have been performed for the most
common arch-specific breakage via libc-test and qemu user-level
emulation. some sysvipc failures remain, but are shared with other big
endian archs and will be fixed separately.
---
 src/thread/m68k/__m68k_read_tp.s |  8 ++++++++
 src/thread/m68k/clone.s          | 24 ++++++++++++++++++++++++
 src/thread/m68k/syscall_cp.s     | 26 ++++++++++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 src/thread/m68k/__m68k_read_tp.s
 create mode 100644 src/thread/m68k/clone.s
 create mode 100644 src/thread/m68k/syscall_cp.s

(limited to 'src/thread/m68k')

diff --git a/src/thread/m68k/__m68k_read_tp.s b/src/thread/m68k/__m68k_read_tp.s
new file mode 100644
index 00000000..86886da8
--- /dev/null
+++ b/src/thread/m68k/__m68k_read_tp.s
@@ -0,0 +1,8 @@
+.text
+.global __m68k_read_tp
+.type   __m68k_read_tp,@function
+__m68k_read_tp:
+	move.l #333,%d0
+	trap #0
+	move.l %d0,%a0
+	rts
diff --git a/src/thread/m68k/clone.s b/src/thread/m68k/clone.s
new file mode 100644
index 00000000..5b61b6fa
--- /dev/null
+++ b/src/thread/m68k/clone.s
@@ -0,0 +1,24 @@
+.text
+.global __clone
+.type   __clone,@function
+__clone:
+	movem.l %d2-%d5,-(%sp)
+	move.l #120,%d0
+	move.l 28(%sp),%d1
+	move.l 24(%sp),%d2
+	and.l #-16,%d2
+	move.l 36(%sp),%d3
+	move.l 44(%sp),%d4
+	move.l 40(%sp),%d5
+	move.l 20(%sp),%a0
+	move.l 32(%sp),%a1
+	trap #0
+	tst.l %d0
+	beq 1f
+	movem.l (%sp)+,%d2-%d5
+	rts
+1:	move.l %a1,-(%sp)
+	jsr (%a0)
+	move.l #1,%d0
+	trap #0
+	clr.b 0
diff --git a/src/thread/m68k/syscall_cp.s b/src/thread/m68k/syscall_cp.s
new file mode 100644
index 00000000..5628a896
--- /dev/null
+++ b/src/thread/m68k/syscall_cp.s
@@ -0,0 +1,26 @@
+.text
+.global __cp_begin
+.hidden __cp_begin
+.global __cp_end
+.hidden __cp_end
+.global __cp_cancel
+.hidden __cp_cancel
+.hidden __cancel
+.global __syscall_cp_asm
+.hidden __syscall_cp_asm
+.type   __syscall_cp_asm,@function
+__syscall_cp_asm:
+	movem.l %d2-%d5,-(%sp)
+	movea.l 20(%sp),%a0
+__cp_begin:
+	move.l (%a0),%d0
+	bne __cp_cancel
+	movem.l 24(%sp),%d0-%d5/%a0
+	trap #0
+__cp_end:
+	movem.l (%sp)+,%d2-%d5
+	rts
+__cp_cancel:
+	movem.l (%sp)+,%d2-%d5
+	move.l __cancel-.-8,%a1
+	jmp (%pc,%a1)
-- 
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