2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/imgact.h>
31 #include <sys/kernel.h>
33 #include <sys/sysent.h>
38 #include <machine/frame.h>
39 #include <machine/pcb.h>
40 #include <machine/vmparam.h>
42 #include <compat/cloudabi/cloudabi_util.h>
44 #include <compat/cloudabi64/cloudabi64_syscall.h>
45 #include <compat/cloudabi64/cloudabi64_util.h>
47 extern const char *cloudabi64_syscallnames[];
48 extern struct sysent cloudabi64_sysent[];
51 cloudabi64_proc_setregs(struct thread *td, struct image_params *imgp,
54 struct trapframe *regs;
56 exec_setregs(td, imgp, stack);
59 * The stack now contains a pointer to the TCB and the auxiliary
60 * vector. Let x0 point to the auxiliary vector, and set
61 * tpidr_el0 to the TCB.
65 stack + roundup(sizeof(cloudabi64_tcb_t), sizeof(register_t));
66 (void)cpu_set_user_tls(td, TO_PTR(stack));
70 cloudabi64_fetch_syscall_args(struct thread *td)
72 struct trapframe *frame;
73 struct syscall_args *sa;
79 /* Obtain system call number. */
80 sa->code = frame->tf_x[8];
81 if (sa->code >= CLOUDABI64_SYS_MAXSYSCALL)
83 sa->callp = &cloudabi64_sysent[sa->code];
84 sa->narg = sa->callp->sy_narg;
86 /* Fetch system call arguments. */
87 for (i = 0; i < MAXARGS; i++)
88 sa->args[i] = frame->tf_x[i];
90 /* Default system call return values. */
92 td->td_retval[1] = frame->tf_x[1];
97 cloudabi64_set_syscall_retval(struct thread *td, int error)
99 struct trapframe *frame = td->td_frame;
103 /* System call succeeded. */
104 frame->tf_x[0] = td->td_retval[0];
105 frame->tf_x[1] = td->td_retval[1];
106 frame->tf_spsr &= ~PSR_C;
109 /* Restart system call. */
115 /* System call returned an error. */
116 frame->tf_x[0] = cloudabi_convert_errno(error);
117 frame->tf_spsr |= PSR_C;
123 cloudabi64_schedtail(struct thread *td)
125 struct trapframe *frame = td->td_frame;
128 * Initial register values for processes returning from fork.
129 * Make sure that we only set these values when forking, not
130 * when creating a new thread.
132 if ((td->td_pflags & TDP_FORKING) != 0) {
133 frame->tf_x[0] = CLOUDABI_PROCESS_CHILD;
134 frame->tf_x[1] = td->td_tid;
139 cloudabi64_thread_setregs(struct thread *td,
140 const cloudabi64_threadattr_t *attr, uint64_t tcb)
142 struct trapframe *frame;
145 /* Perform standard register initialization. */
146 stack.ss_sp = TO_PTR(attr->stack);
147 stack.ss_size = attr->stack_len;
148 cpu_set_upcall(td, TO_PTR(attr->entry_point), NULL, &stack);
151 * Pass in the thread ID of the new thread and the argument
152 * pointer provided by the parent thread in as arguments to the
155 frame = td->td_frame;
156 frame->tf_x[0] = td->td_tid;
157 frame->tf_x[1] = attr->argument;
160 return (cpu_set_user_tls(td, TO_PTR(tcb)));
163 static struct sysentvec cloudabi64_elf_sysvec = {
164 .sv_size = CLOUDABI64_SYS_MAXSYSCALL,
165 .sv_table = cloudabi64_sysent,
166 .sv_fixup = cloudabi64_fixup,
167 .sv_name = "CloudABI ELF64",
168 .sv_coredump = elf64_coredump,
169 .sv_pagesize = PAGE_SIZE,
170 .sv_minuser = VM_MIN_ADDRESS,
171 .sv_maxuser = VM_MAXUSER_ADDRESS,
172 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
173 .sv_copyout_strings = cloudabi64_copyout_strings,
174 .sv_setregs = cloudabi64_proc_setregs,
175 .sv_flags = SV_ABI_CLOUDABI | SV_CAPSICUM | SV_LP64,
176 .sv_set_syscall_retval = cloudabi64_set_syscall_retval,
177 .sv_fetch_syscall_args = cloudabi64_fetch_syscall_args,
178 .sv_syscallnames = cloudabi64_syscallnames,
179 .sv_schedtail = cloudabi64_schedtail,
182 INIT_SYSENTVEC(elf_sysvec, &cloudabi64_elf_sysvec);
184 Elf64_Brandinfo cloudabi64_brand = {
185 .brand = ELFOSABI_CLOUDABI,
186 .machine = EM_AARCH64,
187 .sysvec = &cloudabi64_elf_sysvec,
188 .flags = BI_CAN_EXEC_DYN | BI_BRAND_ONLY_STATIC,