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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/cloudabi32/cloudabi32_syscall.h>
45 #include <compat/cloudabi32/cloudabi32_util.h>
47 extern const char *cloudabi32_syscallnames[];
48 extern struct sysent cloudabi32_sysent[];
51 cloudabi32_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 r0 point to the auxiliary vector, and set
61 * tpidrurw to the TCB.
64 regs->tf_r0 = td->td_retval[0] =
65 stack + roundup(sizeof(cloudabi32_tcb_t), sizeof(register_t));
66 (void)cpu_set_user_tls(td, (void *)stack);
70 cloudabi32_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_r12;
81 if (sa->code >= CLOUDABI32_SYS_MAXSYSCALL)
83 sa->callp = &cloudabi32_sysent[sa->code];
84 sa->narg = sa->callp->sy_narg;
86 /* Fetch system call arguments from registers and the stack. */
87 sa->args[0] = frame->tf_r0;
88 sa->args[1] = frame->tf_r1;
89 sa->args[2] = frame->tf_r2;
90 sa->args[3] = frame->tf_r3;
92 error = copyin((void *)td->td_frame->tf_usr_sp, &sa->args[4],
93 (sa->narg - 4) * sizeof(register_t));
98 /* Default system call return values. */
100 td->td_retval[1] = frame->tf_r1;
105 cloudabi32_set_syscall_retval(struct thread *td, int error)
107 struct trapframe *frame = td->td_frame;
111 /* System call succeeded. */
112 frame->tf_r0 = td->td_retval[0];
113 frame->tf_r1 = td->td_retval[1];
114 frame->tf_spsr &= ~PSR_C;
117 /* Restart system call. */
123 /* System call returned an error. */
124 frame->tf_r0 = cloudabi_convert_errno(error);
125 frame->tf_spsr |= PSR_C;
131 cloudabi32_schedtail(struct thread *td)
133 struct trapframe *frame = td->td_frame;
136 * Initial register values for processes returning from fork.
137 * Make sure that we only set these values when forking, not
138 * when creating a new thread.
140 if ((td->td_pflags & TDP_FORKING) != 0) {
141 frame->tf_r0 = CLOUDABI_PROCESS_CHILD;
142 frame->tf_r1 = td->td_tid;
147 cloudabi32_thread_setregs(struct thread *td,
148 const cloudabi32_threadattr_t *attr, uint32_t tcb)
150 struct trapframe *frame;
153 /* Perform standard register initialization. */
154 stack.ss_sp = TO_PTR(attr->stack);
155 stack.ss_size = attr->stack_len;
156 cpu_set_upcall(td, TO_PTR(attr->entry_point), NULL, &stack);
159 * Pass in the thread ID of the new thread and the argument
160 * pointer provided by the parent thread in as arguments to the
163 frame = td->td_frame;
164 frame->tf_r0 = td->td_tid;
165 frame->tf_r1 = attr->argument;
168 return (cpu_set_user_tls(td, (void *)tcb));
171 static struct sysentvec cloudabi32_elf_sysvec = {
172 .sv_size = CLOUDABI32_SYS_MAXSYSCALL,
173 .sv_table = cloudabi32_sysent,
174 .sv_fixup = cloudabi32_fixup,
175 .sv_name = "CloudABI ELF32",
176 .sv_coredump = elf32_coredump,
177 .sv_pagesize = PAGE_SIZE,
178 .sv_minuser = VM_MIN_ADDRESS,
179 .sv_maxuser = VM_MAXUSER_ADDRESS,
180 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
181 .sv_copyout_strings = cloudabi32_copyout_strings,
182 .sv_setregs = cloudabi32_proc_setregs,
183 .sv_flags = SV_ABI_CLOUDABI | SV_CAPSICUM | SV_ILP32,
184 .sv_set_syscall_retval = cloudabi32_set_syscall_retval,
185 .sv_fetch_syscall_args = cloudabi32_fetch_syscall_args,
186 .sv_syscallnames = cloudabi32_syscallnames,
187 .sv_schedtail = cloudabi32_schedtail,
190 INIT_SYSENTVEC(elf_sysvec, &cloudabi32_elf_sysvec);
192 Elf32_Brandinfo cloudabi32_brand = {
193 .brand = ELFOSABI_CLOUDABI,
195 .sysvec = &cloudabi32_elf_sysvec,
196 .flags = BI_BRAND_ONLY_STATIC,