add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/sh/kernel/process_32.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * arch/sh/kernel/process.c
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  *
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@@ -8,10 +9,6 @@
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  *  SuperH version:  Copyright (C) 1999, 2000  Niibe Yutaka & Kaz Kojima
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  *		     Copyright (C) 2006 Lineo Solutions Inc. support SH4A UBC
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  *		     Copyright (C) 2002 - 2008  Paul Mundt
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- *
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- * This file is subject to the terms and conditions of the GNU General Public
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- * License.  See the file "COPYING" in the main directory of this archive
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- * for more details.
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  */
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 #include <linux/module.h>
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 #include <linux/mm.h>
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@@ -33,36 +30,32 @@
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30
 
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 void show_regs(struct pt_regs * regs)
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 {
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-	printk("\n");
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+	pr_info("\n");
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 	show_regs_print_info(KERN_DEFAULT);
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-	printk("PC is at %pS\n", (void *)instruction_pointer(regs));
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-	printk("PR is at %pS\n", (void *)regs->pr);
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+	pr_info("PC is at %pS\n", (void *)instruction_pointer(regs));
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+	pr_info("PR is at %pS\n", (void *)regs->pr);
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-	printk("PC  : %08lx SP  : %08lx SR  : %08lx ",
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-	       regs->pc, regs->regs[15], regs->sr);
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+	pr_info("PC  : %08lx SP  : %08lx SR  : %08lx ", regs->pc,
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+		regs->regs[15], regs->sr);
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 #ifdef CONFIG_MMU
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-	printk("TEA : %08x\n", __raw_readl(MMU_TEA));
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+	pr_cont("TEA : %08x\n", __raw_readl(MMU_TEA));
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 #else
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-	printk("\n");
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+	pr_cont("\n");
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 #endif
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-	printk("R0  : %08lx R1  : %08lx R2  : %08lx R3  : %08lx\n",
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-	       regs->regs[0],regs->regs[1],
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-	       regs->regs[2],regs->regs[3]);
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-	printk("R4  : %08lx R5  : %08lx R6  : %08lx R7  : %08lx\n",
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-	       regs->regs[4],regs->regs[5],
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-	       regs->regs[6],regs->regs[7]);
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-	printk("R8  : %08lx R9  : %08lx R10 : %08lx R11 : %08lx\n",
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-	       regs->regs[8],regs->regs[9],
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-	       regs->regs[10],regs->regs[11]);
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-	printk("R12 : %08lx R13 : %08lx R14 : %08lx\n",
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-	       regs->regs[12],regs->regs[13],
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-	       regs->regs[14]);
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-	printk("MACH: %08lx MACL: %08lx GBR : %08lx PR  : %08lx\n",
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-	       regs->mach, regs->macl, regs->gbr, regs->pr);
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+	pr_info("R0  : %08lx R1  : %08lx R2  : %08lx R3  : %08lx\n",
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+		regs->regs[0], regs->regs[1], regs->regs[2], regs->regs[3]);
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+	pr_info("R4  : %08lx R5  : %08lx R6  : %08lx R7  : %08lx\n",
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+		regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]);
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+	pr_info("R8  : %08lx R9  : %08lx R10 : %08lx R11 : %08lx\n",
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+		regs->regs[8], regs->regs[9], regs->regs[10], regs->regs[11]);
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+	pr_info("R12 : %08lx R13 : %08lx R14 : %08lx\n",
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+		regs->regs[12], regs->regs[13], regs->regs[14]);
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+	pr_info("MACH: %08lx MACL: %08lx GBR : %08lx PR  : %08lx\n",
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+		regs->mach, regs->macl, regs->gbr, regs->pr);
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-	show_trace(NULL, (unsigned long *)regs->regs[15], regs);
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+	show_trace(NULL, (unsigned long *)regs->regs[15], regs, KERN_DEFAULT);
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 	show_code(regs);
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 }
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@@ -96,30 +89,11 @@
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 	/* do nothing */
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 }
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-/* Fill in the fpu structure for a core dump.. */
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-int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
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-{
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-	int fpvalid = 0;
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-
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-#if defined(CONFIG_SH_FPU)
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-	struct task_struct *tsk = current;
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-
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-	fpvalid = !!tsk_used_math(tsk);
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-	if (fpvalid)
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-		fpvalid = !fpregs_get(tsk, NULL, 0,
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-				      sizeof(struct user_fpu_struct),
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-				      fpu, NULL);
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-#endif
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-
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-	return fpvalid;
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-}
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-EXPORT_SYMBOL(dump_fpu);
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-
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 asmlinkage void ret_from_fork(void);
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 asmlinkage void ret_from_kernel_thread(void);
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-int copy_thread(unsigned long clone_flags, unsigned long usp,
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-		unsigned long arg, struct task_struct *p)
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+int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
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+		struct task_struct *p, unsigned long tls)
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 {
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 	struct thread_info *ti = task_thread_info(p);
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 	struct pt_regs *childregs;
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@@ -140,7 +114,7 @@
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 	childregs = task_pt_regs(p);
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 	p->thread.sp = (unsigned long) childregs;
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-	if (unlikely(p->flags & PF_KTHREAD)) {
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+	if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
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 		memset(childregs, 0, sizeof(struct pt_regs));
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 		p->thread.pc = (unsigned long) ret_from_kernel_thread;
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 		childregs->regs[4] = arg;
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@@ -161,7 +135,7 @@
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 	ti->addr_limit = USER_DS;
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 	if (clone_flags & CLONE_SETTLS)
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-		childregs->gbr = childregs->regs[0];
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+		childregs->gbr = tls;
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 	childregs->regs[0] = 0; /* Set return value for child */
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 	p->thread.pc = (unsigned long) ret_from_fork;