From: Mark Corbin <m...@dibsco.co.uk> Implemented functions for setting up and initializing threads in the RISC-V architecture. The 'target_thread_set_upcall' function sets up the stack pointer, program counter, and function argument for new threads. The 'target_thread_init' function initializes thread registers based on the provided image information.
Signed-off-by: Mark Corbin <m...@dibsco.co.uk> Signed-off-by: Ajeet Singh <itac...@freebsd.org> Co-authored-by: Jessica Clarke <jrt...@jrtc27.com> Co-authored-by: Kyle Evans <kev...@freebsd.org> Reviewed-by: Richard Henderson <richard.hender...@linaro.org> --- bsd-user/riscv/target_arch_thread.h | 47 +++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 bsd-user/riscv/target_arch_thread.h diff --git a/bsd-user/riscv/target_arch_thread.h b/bsd-user/riscv/target_arch_thread.h new file mode 100644 index 0000000000..95cd0b6ad7 --- /dev/null +++ b/bsd-user/riscv/target_arch_thread.h @@ -0,0 +1,47 @@ +/* + * RISC-V thread support + * + * Copyright (c) 2019 Mark Corbin + * + * 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. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef TARGET_ARCH_THREAD_H +#define TARGET_ARCH_THREAD_H + +/* Compare with cpu_set_upcall() in riscv/riscv/vm_machdep.c */ +static inline void target_thread_set_upcall(CPURISCVState *regs, + abi_ulong entry, abi_ulong arg, abi_ulong stack_base, + abi_ulong stack_size) +{ + abi_ulong sp; + + sp = ROUND_DOWN(stack_base + stack_size, 16); + + regs->gpr[xSP] = sp; + regs->pc = entry; + regs->gpr[xA0] = arg; +} + +/* Compare with exec_setregs() in riscv/riscv/machdep.c */ +static inline void target_thread_init(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->sepc = infop->entry; + regs->regs[xRA] = infop->entry; + regs->regs[xA0] = infop->start_stack; + regs->regs[xSP] = ROUND_DOWN(infop->start_stack, 16); +} + +#endif /* TARGET_ARCH_THREAD_H */ -- 2.34.1
