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authorManuel Novoa III <mjn3@codepoet.org>2003-12-02 19:06:32 +0000
committerManuel Novoa III <mjn3@codepoet.org>2003-12-02 19:06:32 +0000
commitbadf426f10ec949aa853aff22123c4e783a421c5 (patch)
treed02c50fd4ae6e68e687a6b4cba6471c9a135867f /libc
parent49583513c6f0575f89c32f4c38315327ab41721f (diff)
Add a syscall() implementation using a hacked version of the syscall6 macro.
Untested, but syscall() is needed by busybox for pivot_root at least.
Diffstat (limited to 'libc')
-rw-r--r--libc/sysdeps/linux/sh/Makefile2
-rw-r--r--libc/sysdeps/linux/sh/syscall.c25
2 files changed, 26 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/sh/Makefile b/libc/sysdeps/linux/sh/Makefile
index f0eaa19fe..0bcdaac4f 100644
--- a/libc/sysdeps/linux/sh/Makefile
+++ b/libc/sysdeps/linux/sh/Makefile
@@ -31,7 +31,7 @@ CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
SSRC=setjmp.S __longjmp.S vfork.S clone.S
SOBJS=$(patsubst %.S,%.o, $(SSRC))
-CSRC=_mmap.c longjmp.c pipe.c __init_brk.c brk.c sbrk.c
+CSRC=_mmap.c longjmp.c pipe.c __init_brk.c brk.c sbrk.c syscall.c
COBJS=$(patsubst %.c,%.o, $(CSRC))
OBJS=$(SOBJS) $(MOBJ) $(COBJS)
diff --git a/libc/sysdeps/linux/sh/syscall.c b/libc/sysdeps/linux/sh/syscall.c
new file mode 100644
index 000000000..b4a6a88f4
--- /dev/null
+++ b/libc/sysdeps/linux/sh/syscall.c
@@ -0,0 +1,25 @@
+
+
+#include <features.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+long syscall(long sysnum,
+ long arg1, long arg2, long arg3,
+ long arg4, long arg5, long arg6)
+{
+register long __sc3 __asm__ ("r3") = sysnum;
+register long __sc4 __asm__ ("r4") = (long) arg1;
+register long __sc5 __asm__ ("r5") = (long) arg2;
+register long __sc6 __asm__ ("r6") = (long) arg3;
+register long __sc7 __asm__ ("r7") = (long) arg4;
+register long __sc0 __asm__ ("r0") = (long) arg5;
+register long __sc1 __asm__ ("r1") = (long) arg6;
+__asm__ __volatile__ ("trapa #0x15" \
+ : "=z" (__sc0) \
+ : "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6), "r" (__sc7), \
+ "r" (__sc3), "r" (__sc1) \
+ : "memory" );
+__syscall_return(long,__sc0);
+}