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
7 * 1. Redistributions of source code must retain the above copyright
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9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
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
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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/kernel.h>
32 #include <sys/sysent.h>
37 #include <machine/frame.h>
38 #include <machine/pcb.h>
39 #include <machine/pmap.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_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
53 struct trapframe *frame = td->td_frame;
55 /* Obtain system call number. */
56 sa->code = frame->tf_rax;
57 if (sa->code >= CLOUDABI64_SYS_MAXSYSCALL)
59 sa->callp = &cloudabi64_sysent[sa->code];
61 /* Fetch system call arguments. */
62 sa->args[0] = frame->tf_rdi;
63 sa->args[1] = frame->tf_rsi;
64 sa->args[2] = frame->tf_rdx;
65 sa->args[3] = frame->tf_rcx; /* Actually %r10. */
66 sa->args[4] = frame->tf_r8;
67 sa->args[5] = frame->tf_r9;
69 /* Default system call return values. */
71 td->td_retval[1] = frame->tf_rdx;
76 cloudabi64_set_syscall_retval(struct thread *td, int error)
78 struct trapframe *frame = td->td_frame;
82 /* System call succeeded. */
83 frame->tf_rax = td->td_retval[0];
84 frame->tf_rdx = td->td_retval[1];
85 frame->tf_rflags &= ~PSL_C;
88 /* Restart system call. */
89 frame->tf_rip -= frame->tf_err;
90 frame->tf_r10 = frame->tf_rcx;
91 set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
96 /* System call returned an error. */
97 frame->tf_rax = cloudabi_convert_errno(error);
98 frame->tf_rflags |= PSL_C;
104 cloudabi64_schedtail(struct thread *td)
106 struct trapframe *frame = td->td_frame;
108 /* Initial register values for processes returning from fork. */
109 frame->tf_rax = CLOUDABI_PROCESS_CHILD;
110 frame->tf_rdx = td->td_tid;
114 cloudabi64_thread_setregs(struct thread *td,
115 const cloudabi64_threadattr_t *attr)
117 struct trapframe *frame;
120 /* Perform standard register initialization. */
121 stack.ss_sp = (void *)attr->stack;
122 stack.ss_size = attr->stack_size;
123 cpu_set_upcall_kse(td, (void *)attr->entry_point, NULL, &stack);
126 * Pass in the thread ID of the new thread and the argument
127 * pointer provided by the parent thread in as arguments to the
130 frame = td->td_frame;
131 frame->tf_rdi = td->td_tid;
132 frame->tf_rsi = attr->argument;
135 static struct sysentvec cloudabi64_elf_sysvec = {
136 .sv_size = CLOUDABI64_SYS_MAXSYSCALL,
137 .sv_table = cloudabi64_sysent,
138 .sv_fixup = cloudabi64_fixup,
139 .sv_name = "CloudABI ELF64",
140 .sv_coredump = elf64_coredump,
141 .sv_pagesize = PAGE_SIZE,
142 .sv_minuser = VM_MIN_ADDRESS,
143 .sv_maxuser = VM_MAXUSER_ADDRESS,
144 .sv_usrstack = USRSTACK,
145 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
146 .sv_copyout_strings = cloudabi64_copyout_strings,
147 .sv_flags = SV_ABI_CLOUDABI | SV_CAPSICUM,
148 .sv_set_syscall_retval = cloudabi64_set_syscall_retval,
149 .sv_fetch_syscall_args = cloudabi64_fetch_syscall_args,
150 .sv_syscallnames = cloudabi64_syscallnames,
151 .sv_schedtail = cloudabi64_schedtail,
154 INIT_SYSENTVEC(elf_sysvec, &cloudabi64_elf_sysvec);
156 Elf64_Brandinfo cloudabi64_brand = {
157 .brand = ELFOSABI_CLOUDABI,
158 .machine = EM_X86_64,
159 .sysvec = &cloudabi64_elf_sysvec,
160 .compat_3_brand = "CloudABI",