PPC port cleaned up, static linking works well now.

4 files changed, 154 insertions, 0 deletions

diff --git a/src/thread/powerpc/__set_thread_area.s b/src/thread/powerpc/__set_thread_area.s
new file mode 100644
index 00000000..c1a34c1f
--- /dev/null
+++ b/src/thread/powerpc/__set_thread_area.s
@@ -0,0 +1,11 @@
+.text
+.global __set_thread_area
+.type   __set_thread_area, %function
+__set_thread_area:
+	# mov pointer in reg3 into r2
+	mr 2, 3
+	# put 0 into return reg
+	li 3, 0
+	# return
+	blr
+
diff --git a/src/thread/powerpc/__unmapself.s b/src/thread/powerpc/__unmapself.s
new file mode 100644
index 00000000..bb3724e3
--- /dev/null
+++ b/src/thread/powerpc/__unmapself.s
@@ -0,0 +1,9 @@
+        .text
+        .global __unmapself
+        .type   __unmapself,%function
+__unmapself:
+        li      0, 91 # __NR_munmap
+        sc
+        li      0, 1 #__NR_exit
+        sc
+        blr
diff --git a/src/thread/powerpc/clone.s b/src/thread/powerpc/clone.s
new file mode 100644
index 00000000..cea69e99
--- /dev/null
+++ b/src/thread/powerpc/clone.s
@@ -0,0 +1,83 @@
+.text
+.global __clone
+.type __clone, %function
+__clone:
+# int clone(fn, stack, flags, arg, ptid, tls, ctid)
+#            a  b       c     d     e    f    g
+#            3  4       5     6     7    8    9
+# pseudo C code:
+# tid = syscall(SYS_clone,c,b,e,f,g);
+# if (!tid) syscall(SYS_exit, a(d));
+# return tid;
+
+# SYS_clone = 120
+# SYS_exit = 1
+
+# in order that the child can find the start func and its arg, we need to store it into
+# non-volative regs. to do so, we have to store those 2 regs into our stackframe, so
+# we can restore them later.
+stw 30, -4(1)
+stw 31, -8(1)
+subi 1, 1, 16 
+
+# save r3 (func) into r30, and r6(arg) into r31
+mr 30, 3
+mr 31, 6
+
+#move c into first arg
+mr 3, 5
+#mr 4, 4
+mr 5, 7
+mr 6, 8
+mr 7, 9
+
+# move syscall number into r0    
+li 0, 120
+
+sc
+
+# check for syscall error
+#this code should be more efficient, but it borks
+#bns+ 1f # jump to label 1 if no summary overflow.
+#else
+#neg 3, 3 #negate the result (errno)
+#b 2f # jump to epilogue
+
+# this error check code at least does not spoil the clone call.
+#mfcr    0                      # Check for an error
+#rlwinm  4, 0, 0, 3, 3        # by checking for bit 28.
+#cmplwi  0, 4, 0               # It is an error if non-zero.
+#beq     0, 1f                  # Jump if not an error.
+#neg     3, 3                  # Negate the error number.
+#b       2f # jump to epilogue
+1:
+# compare sc result with 0
+cmpwi cr7, 3, 0
+
+# if not 0, jump to end
+bne cr7, 2f
+
+#else: we're the child
+#call funcptr
+# move arg (d) into r3
+mr 3, 31
+#move r30 (funcptr) into CTR reg
+mtctr 30
+# call CTR reg
+bctrl
+# mov SYS_exit into r0 (the exit param is already in r3)
+li 0, 1
+sc
+
+2:
+
+# restore stack
+addi 1, 1, 16
+lwz 30, -4(1)
+lwz 31, -8(1)
+
+blr
+
+
+
+
diff --git a/src/thread/powerpc/syscall_cp.s b/src/thread/powerpc/syscall_cp.s
new file mode 100644
index 00000000..2c97ca04
--- /dev/null
+++ b/src/thread/powerpc/syscall_cp.s
@@ -0,0 +1,51 @@
+#r0: volatile. may be modified during linkage.
+#r1: stack frame: 16 byte alignment.
+#r2: tls/thread pointer on pp32
+#r3,r4: return values, first args
+#r5-r10: args
+#r11-r12: volatile. may be modified during linkage
+#r13: "small data area" pointer
+#r14 - r30: local vars
+#r31: local or environment pointer
+
+#r1, r14-31: belong to the caller, must be saved and restored
+#r0, r3-r12, ctr, xer: volatile, not preserved
+#r0,r11,r12: may be altered by cross-module call, 
+#"a func cannot depend on that these regs have the values placed by the caller"
+
+#the fields CR2,CR2,CR4 of the cond reg must be preserved
+#LR (link reg) shall contain the funcs return address
+	.text
+	.global __syscall_cp_asm
+	.type   __syscall_cp_asm,%function
+__syscall_cp_asm:
+	# at enter: r3 = pointer to self->cancel, r4: syscall no, r5: first arg, r6: 2nd, r7: 3rd, r8: 4th, r9: 5th, r10: 6th
+	.global __cp_begin
+__cp_begin:
+	# r3 holds first argument, its a pointer to self->cancel. 
+	# we must compare the dereferenced value with 0 and jump to __cancel if its not
+	
+	lwz 0, 0(3) #deref pointer into r0
+	
+	cmpwi cr7, 0, 0 #compare r0 with 0, store result in cr7. 
+	beq+ cr7, 1f #jump to label 1 if r0 was 0
+	
+	b __cancel #else call cancel 
+	# (the return address is not needed, since __cancel never returns)
+1:
+	#ok, the cancel flag was not set
+	# syscall: number goes to r0, the rest 3-8
+	mr      0, 4                  # put the system call number into r0
+	mr      3, 5                  # Shift the arguments: arg1
+	mr      4, 6                  # arg2
+	mr      5, 7                  # arg3
+	mr      6, 8                  # arg4
+	mr      7, 9                  # arg5
+	mr      8, 10                  # arg6
+	sc
+	.global __cp_end
+__cp_end:
+	bnslr+ # return if no summary overflow. 
+	#else negate result.
+	neg 3, 3
+	blr