1 /*
2 * ARM AArch64 thread support for bsd-user.
3 *
4 * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #ifndef TARGET_ARCH_THREAD_H
21 #define TARGET_ARCH_THREAD_H
22
23 /* Compare to arm64/arm64/vm_machdep.c cpu_set_upcall_kse() */
target_thread_set_upcall(CPUARMState * regs,abi_ulong entry,abi_ulong arg,abi_ulong stack_base,abi_ulong stack_size)24 static inline void target_thread_set_upcall(CPUARMState *regs, abi_ulong entry,
25 abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size)
26 {
27 abi_ulong sp;
28
29 /*
30 * Make sure the stack is properly aligned.
31 * arm64/include/param.h (STACKLIGN() macro)
32 */
33 sp = ROUND_DOWN(stack_base + stack_size, 16);
34
35 /* sp = stack base */
36 regs->xregs[31] = sp;
37 /* pc = start function entry */
38 regs->pc = entry;
39 /* r0 = arg */
40 regs->xregs[0] = arg;
41
42
43 }
44
target_thread_init(struct target_pt_regs * regs,struct image_info * infop)45 static inline void target_thread_init(struct target_pt_regs *regs,
46 struct image_info *infop)
47 {
48 abi_long stack = infop->start_stack;
49
50 /*
51 * Make sure the stack is properly aligned.
52 * arm64/include/param.h (STACKLIGN() macro)
53 */
54
55 memset(regs, 0, sizeof(*regs));
56 regs->regs[0] = infop->start_stack;
57 regs->pc = infop->entry;
58 regs->sp = ROUND_DOWN(stack, 16);
59 }
60
61 #endif /* TARGET_ARCH_THREAD_H */
62