1 /*-
2  * SPDX-License-Identifier: BSD-4-Clause
19  * 3. All advertising materials mentioning features or use of this software
29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
83 #include <compat/ia32/ia32_signal.h>
127 	p = td->td_proc;  in ia32_fetch_syscall_args()
128 	frame = td->td_frame;  in ia32_fetch_syscall_args()
129 	sa = &td->td_sa;  in ia32_fetch_syscall_args()
132 	if (__predict_false(frame->tf_cs == 7 && frame->tf_rip == 2)) {  in ia32_fetch_syscall_args()
135 		 * frame to what it would be for a direct int 0x80 instead  in ia32_fetch_syscall_args()
138 		error = fueword32((void *)frame->tf_rsp, &eip);  in ia32_fetch_syscall_args()
139 		if (error == -1)  in ia32_fetch_syscall_args()
141 		cs = fuword16((void *)(frame->tf_rsp + sizeof(u_int32_t)));  in ia32_fetch_syscall_args()
142 		if (cs == -1)  in ia32_fetch_syscall_args()
146 		 * Unwind in-kernel frame after all stack frame pieces  in ia32_fetch_syscall_args()
149 		frame->tf_rip = eip;  in ia32_fetch_syscall_args()
150 		frame->tf_cs = cs;  in ia32_fetch_syscall_args()
151 		frame->tf_rsp += 2 * sizeof(u_int32_t);  in ia32_fetch_syscall_args()
152 		frame->tf_err = 7;		/* size of lcall $7,$0 */  in ia32_fetch_syscall_args()
156 	params = (caddr_t)frame->tf_rsp + sizeof(u_int32_t);  in ia32_fetch_syscall_args()
157 	sa->code = frame->tf_rax;  in ia32_fetch_syscall_args()
158 	sa->original_code = sa->code;  in ia32_fetch_syscall_args()
161 	 * Need to check if this is a 32 bit or 64 bit syscall.  in ia32_fetch_syscall_args()
163 	if (sa->code == SYS_syscall) {  in ia32_fetch_syscall_args()
168 		if (error == -1)  in ia32_fetch_syscall_args()
170 		sa->code = tmp;  in ia32_fetch_syscall_args()
172 	} else if (sa->code == SYS___syscall) {  in ia32_fetch_syscall_args()
174 		 * Like syscall, but code is a quad, so as to maintain  in ia32_fetch_syscall_args()
176 		 * We use a 32-bit fetch in case params is not  in ia32_fetch_syscall_args()
180 		if (error == -1)  in ia32_fetch_syscall_args()
182 		sa->code = tmp;  in ia32_fetch_syscall_args()
185  	if (sa->code >= p->p_sysent->sv_size)  in ia32_fetch_syscall_args()
186 		sa->callp = &nosys_sysent;  in ia32_fetch_syscall_args()
188  		sa->callp = &p->p_sysent->sv_table[sa->code];  in ia32_fetch_syscall_args()
190 	if (params != NULL && sa->callp->sy_narg != 0)  in ia32_fetch_syscall_args()
192 		    (u_int)(sa->callp->sy_narg * sizeof(int)));  in ia32_fetch_syscall_args()
196 	for (i = 0; i < sa->callp->sy_narg; i++)  in ia32_fetch_syscall_args()
197 		sa->args[i] = args[i];  in ia32_fetch_syscall_args()
200 		td->td_retval[0] = 0;  in ia32_fetch_syscall_args()
201 		td->td_retval[1] = frame->tf_rdx;  in ia32_fetch_syscall_args()
218 	orig_tf_rflags = frame->tf_rflags;  in ia32_syscall()
220 	td->td_frame = frame;  in ia32_syscall()
228 		frame->tf_rflags &= ~PSL_T;  in ia32_syscall()
232 		ksi.ksi_addr = (void *)frame->tf_rip;  in ia32_syscall()
237 	amd64_syscall_ret_flush_l1d(td->td_errno);  in ia32_syscall()
271 	lcall_addr = PROC_PS_STRINGS(curproc) -  in setup_lcall_gate()
272 	    (_binary_elf_vdso32_so_1_end - _binary_elf_vdso32_so_1_start) +  in setup_lcall_gate()