process.c (f4091322d7397c8eb85c071570cab0e82ee3e261) process.c (9ac08002130b591d0f2ee035aa9062f84f2f15cb)
1/*
2 * Based on arch/arm/kernel/process.c
3 *
4 * Original Copyright (C) 1995 Linus Torvalds
5 * Copyright (C) 1996-2000 Russell King - Converted to ARM.
6 * Copyright (C) 2012 ARM Ltd.
7 *
8 * This program is free software; you can redistribute it and/or modify

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230 *dst = *src;
231 return 0;
232}
233
234asmlinkage void ret_from_fork(void) asm("ret_from_fork");
235
236int copy_thread(unsigned long clone_flags, unsigned long stack_start,
237 unsigned long stk_sz, struct task_struct *p,
1/*
2 * Based on arch/arm/kernel/process.c
3 *
4 * Original Copyright (C) 1995 Linus Torvalds
5 * Copyright (C) 1996-2000 Russell King - Converted to ARM.
6 * Copyright (C) 2012 ARM Ltd.
7 *
8 * This program is free software; you can redistribute it and/or modify

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230 *dst = *src;
231 return 0;
232}
233
234asmlinkage void ret_from_fork(void) asm("ret_from_fork");
235
236int copy_thread(unsigned long clone_flags, unsigned long stack_start,
237 unsigned long stk_sz, struct task_struct *p,
238 struct pt_regs *regs)
238 struct pt_regs *unused)
239{
240 struct pt_regs *childregs = task_pt_regs(p);
241 unsigned long tls = p->thread.tp_value;
242
243 memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context));
244
239{
240 struct pt_regs *childregs = task_pt_regs(p);
241 unsigned long tls = p->thread.tp_value;
242
243 memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context));
244
245 if (likely(regs)) {
246 *childregs = *regs;
245 if (likely(!(p->flags & PF_KTHREAD))) {
246 *childregs = *current_pt_regs();
247 childregs->regs[0] = 0;
248 if (is_compat_thread(task_thread_info(p))) {
249 if (stack_start)
250 childregs->compat_sp = stack_start;
251 } else {
252 /*
253 * Read the current TLS pointer from tpidr_el0 as it may be
254 * out-of-sync with the saved value.

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261 childregs->sp = stack_start;
262 }
263 }
264 /*
265 * If a TLS pointer was passed to clone (4th argument), use it
266 * for the new thread.
267 */
268 if (clone_flags & CLONE_SETTLS)
247 childregs->regs[0] = 0;
248 if (is_compat_thread(task_thread_info(p))) {
249 if (stack_start)
250 childregs->compat_sp = stack_start;
251 } else {
252 /*
253 * Read the current TLS pointer from tpidr_el0 as it may be
254 * out-of-sync with the saved value.

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261 childregs->sp = stack_start;
262 }
263 }
264 /*
265 * If a TLS pointer was passed to clone (4th argument), use it
266 * for the new thread.
267 */
268 if (clone_flags & CLONE_SETTLS)
269 tls = regs->regs[3];
269 tls = childregs->regs[3];
270 } else {
271 memset(childregs, 0, sizeof(struct pt_regs));
272 childregs->pstate = PSR_MODE_EL1h;
273 p->thread.cpu_context.x19 = stack_start;
274 p->thread.cpu_context.x20 = stk_sz;
275 }
276 p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
277 p->thread.cpu_context.sp = (unsigned long)childregs;

--- 90 unchanged lines hidden --- 		270 } else {
271 memset(childregs, 0, sizeof(struct pt_regs));
272 childregs->pstate = PSR_MODE_EL1h;
273 p->thread.cpu_context.x19 = stack_start;
274 p->thread.cpu_context.x20 = stk_sz;
275 }
276 p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
277 p->thread.cpu_context.sp = (unsigned long)childregs;

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