1acce7718b
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>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
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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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