mirror of https://github.com/xemu-project/xemu.git
bsd-user:Add AArch64 register handling and related functions
Added header file for managing CPU register states in FreeBSD user mode. Introduced prototypes for setting and getting thread-local storage (TLS). Implemented AArch64 sysarch() system call emulation and a printing function. Added function for setting up thread upcall to add thread support to BSD-USER. Initialized thread's register state during thread setup. Updated ARM AArch64 VM parameter definitions for bsd-user, including address spaces for FreeBSD/arm64 and a function for getting the stack pointer from CPU and setting a return value. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Ajeet Singh <itachis@FreeBSD.org> Co-authored-by: Jessica Clarke <jrtc27@jrtc27.com> Co-authored-by: Sean Bruno <sbruno@freebsd.org> Co-authored-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240707191128.10509-3-itachis@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
This commit is contained in:
Stacey Son
Warner Losh
parent
8cbb4fc12e
commit
1acce7718b
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/*
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* ARM AArch64 specific prototypes for bsd-user
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*
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* Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_ARCH_H
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#define TARGET_ARCH_H
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#include "qemu.h"
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void target_cpu_set_tls(CPUARMState *env, target_ulong newtls);
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target_ulong target_cpu_get_tls(CPUARMState *env);
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#endif /* TARGET_ARCH_H */
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/*
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* FreeBSD arm64 register structures
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*
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* Copyright (c) 2015 Stacey Son
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_ARCH_REG_H
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#define TARGET_ARCH_REG_H
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/* See sys/arm64/include/reg.h */
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typedef struct target_reg {
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uint64_t x[30];
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uint64_t lr;
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uint64_t sp;
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uint64_t elr;
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uint64_t spsr;
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} target_reg_t;
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typedef struct target_fpreg {
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__uint128_t fp_q[32];
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uint32_t fp_sr;
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uint32_t fp_cr;
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} target_fpreg_t;
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#define tswapreg(ptr) tswapal(ptr)
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static inline void target_copy_regs(target_reg_t *regs, CPUARMState *env)
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{
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int i;
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for (i = 0; i < 30; i++) {
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regs->x[i] = tswapreg(env->xregs[i]);
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}
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regs->lr = tswapreg(env->xregs[30]);
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regs->sp = tswapreg(env->xregs[31]);
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regs->elr = tswapreg(env->pc);
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regs->spsr = tswapreg(pstate_read(env));
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}
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#undef tswapreg
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#endif /* TARGET_ARCH_REG_H */
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@ -0,0 +1,42 @@
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/*
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* ARM AArch64 sysarch() system call emulation for bsd-user.
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*
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* Copyright (c) 2015 <sson at FreeBSD>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_ARCH_SYSARCH_H
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#define TARGET_ARCH_SYSARCH_H
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#include "target_syscall.h"
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#include "target_arch.h"
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/* See sysarch() in sys/arm64/arm64/sys_machdep.c */
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static inline abi_long do_freebsd_arch_sysarch(CPUARMState *env, int op,
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abi_ulong parms)
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{
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int ret = -TARGET_EOPNOTSUPP;
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fprintf(stderr, "sysarch");
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return ret;
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}
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static inline void do_freebsd_arch_print_sysarch(
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const struct syscallname *name, abi_long arg1, abi_long arg2,
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abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6)
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{
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}
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#endif /* TARGET_ARCH_SYSARCH_H */
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@ -0,0 +1,61 @@
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/*
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* ARM AArch64 thread support for bsd-user.
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*
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* Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_ARCH_THREAD_H
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#define TARGET_ARCH_THREAD_H
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/* Compare to arm64/arm64/vm_machdep.c cpu_set_upcall_kse() */
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static inline void target_thread_set_upcall(CPUARMState *regs, abi_ulong entry,
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abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size)
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{
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abi_ulong sp;
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/*
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* Make sure the stack is properly aligned.
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* arm64/include/param.h (STACKLIGN() macro)
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*/
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sp = ROUND_DOWN(stack_base + stack_size, 16);
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/* sp = stack base */
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regs->xregs[31] = sp;
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/* pc = start function entry */
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regs->pc = entry;
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/* r0 = arg */
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regs->xregs[0] = arg;
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}
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static inline void target_thread_init(struct target_pt_regs *regs,
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struct image_info *infop)
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{
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abi_long stack = infop->start_stack;
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/*
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* Make sure the stack is properly aligned.
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* arm64/include/param.h (STACKLIGN() macro)
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*/
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memset(regs, 0, sizeof(*regs));
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regs->regs[0] = infop->start_stack;
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regs->pc = infop->entry;
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regs->sp = ROUND_DOWN(stack, 16);
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}
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#endif /* TARGET_ARCH_THREAD_H */
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@ -0,0 +1,68 @@
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/*
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* ARM AArch64 VM parameters definitions for bsd-user.
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*
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* Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_ARCH_VMPARAM_H
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#define TARGET_ARCH_VMPARAM_H
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#include "cpu.h"
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/**
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* FreeBSD/arm64 Address space layout.
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*
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* ARMv8 implements up to a 48 bit virtual address space. The address space is
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* split into 2 regions at each end of the 64 bit address space, with an
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* out of range "hole" in the middle.
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*
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* We limit the size of the two spaces to 39 bits each.
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*
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* Upper region: 0xffffffffffffffff
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* 0xffffff8000000000
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*
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* Hole: 0xffffff7fffffffff
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* 0x0000008000000000
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*
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* Lower region: 0x0000007fffffffff
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* 0x0000000000000000
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*
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* The upper region for the kernel, and the lower region for userland.
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*/
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/* compare to sys/arm64/include/vmparam.h */
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#define TARGET_MAXTSIZ (1 * GiB) /* max text size */
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#define TARGET_DFLDSIZ (128 * MiB) /* initial data size limit */
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#define TARGET_MAXDSIZ (1 * GiB) /* max data size */
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#define TARGET_DFLSSIZ (128 * MiB) /* initial stack size limit */
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#define TARGET_MAXSSIZ (1 * GiB) /* max stack size */
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#define TARGET_SGROWSIZ (128 * KiB) /* amount to grow stack */
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/* KERNBASE - 512 MB */
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#define TARGET_VM_MAXUSER_ADDRESS (0x00007fffff000000ULL - (512 * MiB))
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#define TARGET_USRSTACK TARGET_VM_MAXUSER_ADDRESS
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static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
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{
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return state->xregs[31]; /* sp */
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}
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static inline void set_second_rval(CPUARMState *state, abi_ulong retval2)
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{
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state->xregs[1] = retval2; /* XXX not really used on 64-bit arch */
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}
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#endif /* TARGET_ARCH_VMPARAM_H */
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