From: Stacey Son <s...@freebsd.org> Function for setting up thread upcall which will add thread support to BSD-User
Signed-off-by: Stacey Son <s...@freebsd.org> Signed-off-by: Ajeet Singh <itac...@freebsd.org> Co-authored-by: Jessica Clarke <jrt...@jrtc27.com> --- bsd-user/aarch64/target_arch_thread.h | 45 +++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 bsd-user/aarch64/target_arch_thread.h diff --git a/bsd-user/aarch64/target_arch_thread.h b/bsd-user/aarch64/target_arch_thread.h new file mode 100644 index 0000000000..d2f2dea7ce --- /dev/null +++ b/bsd-user/aarch64/target_arch_thread.h @@ -0,0 +1,45 @@ +/* + * ARM AArch64 thread support for bsd-user. + * + * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef TARGET_ARCH_THREAD_H +#define TARGET_ARCH_THREAD_H + +/* Compare to arm64/arm64/vm_machdep.c cpu_set_upcall_kse() */ +static inline void target_thread_set_upcall(CPUARMState *regs, abi_ulong entry, + abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size) +{ + abi_ulong sp; + + /* + * Make sure the stack is properly aligned. + * arm64/include/param.h (STACKLIGN() macro) + */ + sp = (abi_ulong)(stack_base + stack_size) & ~(16 - 1); + + /* sp = stack base */ + regs->xregs[31] = sp; + /* pc = start function entry */ + regs->pc = entry; + /* r0 = arg */ + regs->xregs[0] = arg; + + pstate_write(regs, PSTATE_MODE_EL0t); +} + +#endif /* TARGET_ARCH_THREAD_H */ -- 2.34.1
