From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/frv/kernel/kernel_thread.S | 77 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 arch/frv/kernel/kernel_thread.S (limited to 'arch/frv/kernel/kernel_thread.S') diff --git a/arch/frv/kernel/kernel_thread.S b/arch/frv/kernel/kernel_thread.S new file mode 100644 index 00000000000..4531c830d20 --- /dev/null +++ b/arch/frv/kernel/kernel_thread.S @@ -0,0 +1,77 @@ +/* kernel_thread.S: kernel thread creation + * + * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include +#include + +#define CLONE_VM 0x00000100 /* set if VM shared between processes */ +#define KERN_ERR "<3>" + + .section .rodata +kernel_thread_emsg: + .asciz KERN_ERR "failed to create kernel thread: error=%d\n" + + .text + .balign 4 + +############################################################################### +# +# Create a kernel thread +# +# int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) +# +############################################################################### + .globl kernel_thread + .type kernel_thread,@function +kernel_thread: + or.p gr8,gr0,gr4 + or gr9,gr0,gr5 + + # start by forking the current process, but with shared VM + setlos.p #__NR_clone,gr7 ; syscall number + ori gr10,#CLONE_VM,gr8 ; first syscall arg [clone_flags] + sethi.p #0xe4e4,gr9 ; second syscall arg [newsp] + setlo #0xe4e4,gr9 + setlos.p #0,gr10 ; third syscall arg [parent_tidptr] + setlos #0,gr11 ; fourth syscall arg [child_tidptr] + tira gr0,#0 + setlos.p #4095,gr7 + andcc gr8,gr8,gr0,icc0 + addcc.p gr8,gr7,gr0,icc1 + bnelr icc0,#2 + bc icc1,#0,kernel_thread_error + + # now invoke the work function + or gr5,gr0,gr8 + calll @(gr4,gr0) + + # and finally exit the thread + setlos #__NR_exit,gr7 ; syscall number + tira gr0,#0 + +kernel_thread_error: + subi sp,#8,sp + movsg lr,gr4 + sti gr8,@(sp,#0) + sti.p gr4,@(sp,#4) + + or gr8,gr0,gr9 + sethi.p %hi(kernel_thread_emsg),gr8 + setlo %lo(kernel_thread_emsg),gr8 + + call printk + + ldi @(sp,#4),gr4 + ldi @(sp,#0),gr8 + subi sp,#8,sp + jmpl @(gr4,gr0) + + .size kernel_thread,.-kernel_thread -- cgit v1.2.3