ppc/ppc64 support from Paul Mackerrasklibc-0.119

6 files changed, 90 insertions, 1 deletions

diff --git a/klibc/arch/ppc/Makefile.inc b/klibc/arch/ppc/Makefile.inc
index 3bd2c0643c89a..c6bb975f0f760 100644
--- a/klibc/arch/ppc/Makefile.inc
+++ b/klibc/arch/ppc/Makefile.inc
@@ -9,6 +9,7 @@
 
 ARCHOBJS = \
 	arch/$(ARCH)/setjmp.o \
+	arch/$(ARCH)/syscall.o \
 	libgcc/__divdi3.o \
 	libgcc/__moddi3.o \
 	libgcc/__udivdi3.o \
diff --git a/klibc/arch/ppc/syscall.S b/klibc/arch/ppc/syscall.S
new file mode 100644
index 0000000000000..0a7c37c9035ac
--- /dev/null
+++ b/klibc/arch/ppc/syscall.S
@@ -0,0 +1,16 @@
+/*
+ * arch/ppc/syscall.S
+ *
+ * Common error-handling path for system calls.
+ */
+
+	.text
+	.align	2
+	.globl	__syscall_error
+	.type	__syscall_error,@function
+__syscall_error:
+	lis	9,errno@ha
+	stw	3,errno@l(9)
+	li	3,-1
+	blr
+	.size	__syscall_error,.-__syscall_error
diff --git a/klibc/arch/ppc/sysstub.ph b/klibc/arch/ppc/sysstub.ph
new file mode 100644
index 0000000000000..542ab5575c963
--- /dev/null
+++ b/klibc/arch/ppc/sysstub.ph
@@ -0,0 +1,25 @@
+# -*- perl -*-
+#
+# arch/ppc/sysstub.ph
+#
+# Script to generate system call stubs
+#
+
+sub make_sysstub($$$$@) {
+    my($fname, $type, $sname, $stype, @args) = @_;
+
+    open(OUT, '>', "syscalls/${fname}.S");
+    print OUT "#include <asm/unistd.h>\n";
+    print OUT "\n";
+    print OUT "\t.type ${fname},\@function\n";
+    print OUT "\t.globl ${fname}\n";
+    print OUT "${fname}:\n";
+    print OUT "\tli 0,__NR_${sname}\n";
+    print OUT "\tsc\n";
+    print OUT "\tbnslr\n";
+    print OUT "\tb __syscall_error\n";
+    print OUT "\t.size ${fname},.-${fname}\n";
+    close(OUT);
+}
+
+1;
diff --git a/klibc/arch/ppc64/Makefile.inc b/klibc/arch/ppc64/Makefile.inc
index 3ab3a8c8e64fb..c2d1d2fbfcc01 100644
--- a/klibc/arch/ppc64/Makefile.inc
+++ b/klibc/arch/ppc64/Makefile.inc
@@ -8,7 +8,8 @@
 #
 
 ARCHOBJS = \
-	arch/$(ARCH)/setjmp.o
+	arch/$(ARCH)/setjmp.o \
+	arch/$(ARCH)/syscall.o
 
 ARCHSOOBJS = $(patsubst %.o,%.lo,$(ARCHOBJS))
 
diff --git a/klibc/arch/ppc64/syscall.c b/klibc/arch/ppc64/syscall.c
new file mode 100644
index 0000000000000..a5895fe88e834
--- /dev/null
+++ b/klibc/arch/ppc64/syscall.c
@@ -0,0 +1,14 @@
+/*
+ * arch/ppc64/syscall.c
+ *
+ * Common error-handling path for system calls.
+ * The return value from __syscall_error becomes the
+ * return value from the system call.
+ */
+#include <errno.h>
+
+long int __syscall_error(long int err)
+{
+	errno = err;
+	return -1;
+}
diff --git a/klibc/arch/ppc64/sysstub.ph b/klibc/arch/ppc64/sysstub.ph
new file mode 100644
index 0000000000000..6292f057d249b
--- /dev/null
+++ b/klibc/arch/ppc64/sysstub.ph
@@ -0,0 +1,32 @@
+# -*- perl -*-
+#
+# arch/ppc64/sysstub.ph
+#
+# Script to generate system call stubs
+#
+
+sub make_sysstub($$$$@) {
+    my($fname, $type, $sname, $stype, @args) = @_;
+
+    open(OUT, '>', "syscalls/${fname}.S");
+    print OUT "#include <asm/unistd.h>\n";
+    print OUT "\n";
+    print OUT "\t.globl ${fname}\n";
+    print OUT "\t.section \".opd\",\"aw\"\n";
+    print OUT "\t.align 3\n";
+    print OUT "${fname}:\n";
+    print OUT "\t.quad .${fname},.TOC.\@tocbase,0\n";
+    print OUT "\t.size ${fname},24\n";
+    print OUT "\t.text\n";
+    print OUT "\t.type .${fname},\@function\n";
+    print OUT "\t.globl .${fname}\n";
+    print OUT ".${fname}:\n";
+    print OUT "\tli 0,__NR_${sname}\n";
+    print OUT "\tsc\n";
+    print OUT "\tbnslr\n";
+    print OUT "\tb __syscall_error\n";
+    print OUT "\t.size .${fname},.-.${fname}\n";
+    close(OUT);
+}
+
+1;