| ia32_syscall.c (160801) | ia32_syscall.c (165303) |
|---|---|
| 1/*- 2 * Copyright (C) 1994, David Greenman 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the University of Utah, and William Jolitz. 8 * --- 22 unchanged lines hidden (view full) --- 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38#include <sys/cdefs.h> | 1/*- 2 * Copyright (C) 1994, David Greenman 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the University of Utah, and William Jolitz. 8 * --- 22 unchanged lines hidden (view full) --- 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38#include <sys/cdefs.h> |
| 39__FBSDID("$FreeBSD: head/sys/amd64/ia32/ia32_syscall.c 160801 2006-07-28 20:22:58Z jhb $"); | 39__FBSDID("$FreeBSD: head/sys/amd64/ia32/ia32_syscall.c 165303 2006-12-17 06:48:40Z kmacy $"); |
| 40 41/* 42 * 386 Trap and System call handling 43 */ 44 45#include "opt_clock.h" 46#include "opt_cpu.h" 47#include "opt_isa.h" --- 33 unchanged lines hidden (view full) --- 81#include <machine/intr_machdep.h> 82#include <machine/md_var.h> 83 84#define IDTVEC(name) __CONCAT(X,name) 85 86extern inthand_t IDTVEC(int0x80_syscall), IDTVEC(rsvd); 87extern const char *freebsd32_syscallnames[]; 88 | 40 41/* 42 * 386 Trap and System call handling 43 */ 44 45#include "opt_clock.h" 46#include "opt_cpu.h" 47#include "opt_isa.h" --- 33 unchanged lines hidden (view full) --- 81#include <machine/intr_machdep.h> 82#include <machine/md_var.h> 83 84#define IDTVEC(name) __CONCAT(X,name) 85 86extern inthand_t IDTVEC(int0x80_syscall), IDTVEC(rsvd); 87extern const char *freebsd32_syscallnames[]; 88 |
| 89void ia32_syscall(struct trapframe frame); /* Called from asm code */ | 89void ia32_syscall(struct trapframe *frame); /* Called from asm code */ |
| 90 91void | 90 91void |
| 92ia32_syscall(struct trapframe frame) | 92ia32_syscall(struct trapframe *frame) |
| 93{ 94 caddr_t params; 95 int i; 96 struct sysent *callp; 97 struct thread *td = curthread; 98 struct proc *p = td->td_proc; 99 register_t orig_tf_rflags; 100 int error; --- 5 unchanged lines hidden (view full) --- 106 107 /* 108 * note: PCPU_LAZY_INC() can only be used if we can afford 109 * occassional inaccuracy in the count. 110 */ 111 PCPU_LAZY_INC(cnt.v_syscall); 112 113 td->td_pticks = 0; | 93{ 94 caddr_t params; 95 int i; 96 struct sysent *callp; 97 struct thread *td = curthread; 98 struct proc *p = td->td_proc; 99 register_t orig_tf_rflags; 100 int error; --- 5 unchanged lines hidden (view full) --- 106 107 /* 108 * note: PCPU_LAZY_INC() can only be used if we can afford 109 * occassional inaccuracy in the count. 110 */ 111 PCPU_LAZY_INC(cnt.v_syscall); 112 113 td->td_pticks = 0; |
| 114 td->td_frame = &frame; | 114 td->td_frame = frame; |
| 115 if (td->td_ucred != p->p_ucred) 116 cred_update_thread(td); | 115 if (td->td_ucred != p->p_ucred) 116 cred_update_thread(td); |
| 117 params = (caddr_t)frame.tf_rsp + sizeof(u_int32_t); 118 code = frame.tf_rax; 119 orig_tf_rflags = frame.tf_rflags; | 117 params = (caddr_t)frame->tf_rsp + sizeof(u_int32_t); 118 code = frame->tf_rax; 119 orig_tf_rflags = frame->tf_rflags; |
| 120 121 if (p->p_sysent->sv_prepsyscall) { 122 /* 123 * The prep code is MP aware. 124 */ | 120 121 if (p->p_sysent->sv_prepsyscall) { 122 /* 123 * The prep code is MP aware. 124 */ |
| 125 (*p->p_sysent->sv_prepsyscall)(&frame, args, &code, ¶ms); | 125 (*p->p_sysent->sv_prepsyscall)(frame, args, &code, ¶ms); |
| 126 } else { 127 /* 128 * Need to check if this is a 32 bit or 64 bit syscall. 129 * fuword is MP aware. 130 */ 131 if (code == SYS_syscall) { 132 /* 133 * Code is first argument, followed by actual args. --- 38 unchanged lines hidden (view full) --- 172 if (KTRPOINT(td, KTR_SYSCALL)) 173 ktrsyscall(code, narg, args64); 174#endif 175 CTR4(KTR_SYSC, "syscall enter thread %p pid %d proc %s code %d", td, 176 td->td_proc->p_pid, td->td_proc->p_comm, code); 177 178 if (error == 0) { 179 td->td_retval[0] = 0; | 126 } else { 127 /* 128 * Need to check if this is a 32 bit or 64 bit syscall. 129 * fuword is MP aware. 130 */ 131 if (code == SYS_syscall) { 132 /* 133 * Code is first argument, followed by actual args. --- 38 unchanged lines hidden (view full) --- 172 if (KTRPOINT(td, KTR_SYSCALL)) 173 ktrsyscall(code, narg, args64); 174#endif 175 CTR4(KTR_SYSC, "syscall enter thread %p pid %d proc %s code %d", td, 176 td->td_proc->p_pid, td->td_proc->p_comm, code); 177 178 if (error == 0) { 179 td->td_retval[0] = 0; |
| 180 td->td_retval[1] = frame.tf_rdx; | 180 td->td_retval[1] = frame->tf_rdx; |
| 181 182 STOPEVENT(p, S_SCE, narg); 183 184 PTRACESTOP_SC(p, td, S_PT_SCE); 185 186 AUDIT_SYSCALL_ENTER(code, td); 187 error = (*callp->sy_call)(td, args64); 188 AUDIT_SYSCALL_EXIT(error, td); 189 } 190 191 switch (error) { 192 case 0: | 181 182 STOPEVENT(p, S_SCE, narg); 183 184 PTRACESTOP_SC(p, td, S_PT_SCE); 185 186 AUDIT_SYSCALL_ENTER(code, td); 187 error = (*callp->sy_call)(td, args64); 188 AUDIT_SYSCALL_EXIT(error, td); 189 } 190 191 switch (error) { 192 case 0: |
| 193 frame.tf_rax = td->td_retval[0]; 194 frame.tf_rdx = td->td_retval[1]; 195 frame.tf_rflags &= ~PSL_C; | 193 frame->tf_rax = td->td_retval[0]; 194 frame->tf_rdx = td->td_retval[1]; 195 frame->tf_rflags &= ~PSL_C; |
| 196 break; 197 198 case ERESTART: 199 /* 200 * Reconstruct pc, assuming lcall $X,y is 7 bytes, 201 * int 0x80 is 2 bytes. We saved this in tf_err. 202 */ | 196 break; 197 198 case ERESTART: 199 /* 200 * Reconstruct pc, assuming lcall $X,y is 7 bytes, 201 * int 0x80 is 2 bytes. We saved this in tf_err. 202 */ |
| 203 frame.tf_rip -= frame.tf_err; | 203 frame->tf_rip -= frame->tf_err; |
| 204 break; 205 206 case EJUSTRETURN: 207 break; 208 209 default: 210 if (p->p_sysent->sv_errsize) { 211 if (error >= p->p_sysent->sv_errsize) 212 error = -1; /* XXX */ 213 else 214 error = p->p_sysent->sv_errtbl[error]; 215 } | 204 break; 205 206 case EJUSTRETURN: 207 break; 208 209 default: 210 if (p->p_sysent->sv_errsize) { 211 if (error >= p->p_sysent->sv_errsize) 212 error = -1; /* XXX */ 213 else 214 error = p->p_sysent->sv_errtbl[error]; 215 } |
| 216 frame.tf_rax = error; 217 frame.tf_rflags |= PSL_C; | 216 frame->tf_rax = error; 217 frame->tf_rflags |= PSL_C; |
| 218 break; 219 } 220 221 /* 222 * Traced syscall. 223 */ 224 if (orig_tf_rflags & PSL_T) { | 218 break; 219 } 220 221 /* 222 * Traced syscall. 223 */ 224 if (orig_tf_rflags & PSL_T) { |
| 225 frame.tf_rflags &= ~PSL_T; | 225 frame->tf_rflags &= ~PSL_T; |
| 226 ksiginfo_init_trap(&ksi); 227 ksi.ksi_signo = SIGTRAP; 228 ksi.ksi_code = TRAP_TRACE; | 226 ksiginfo_init_trap(&ksi); 227 ksi.ksi_signo = SIGTRAP; 228 ksi.ksi_code = TRAP_TRACE; |
| 229 ksi.ksi_addr = (void *)frame.tf_rip; | 229 ksi.ksi_addr = (void *)frame->tf_rip; |
| 230 trapsignal(td, &ksi); 231 } 232 233 /* 234 * Check for misbehavior. 235 */ 236 WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning", 237 (code >= 0 && code < SYS_MAXSYSCALL) ? freebsd32_syscallnames[code] : "???"); 238 KASSERT(td->td_critnest == 0, 239 ("System call %s returning in a critical section", 240 (code >= 0 && code < SYS_MAXSYSCALL) ? freebsd32_syscallnames[code] : "???")); 241 KASSERT(td->td_locks == 0, 242 ("System call %s returning with %d locks held", 243 (code >= 0 && code < SYS_MAXSYSCALL) ? freebsd32_syscallnames[code] : "???", 244 td->td_locks)); 245 246 /* 247 * Handle reschedule and other end-of-syscall issues 248 */ | 230 trapsignal(td, &ksi); 231 } 232 233 /* 234 * Check for misbehavior. 235 */ 236 WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning", 237 (code >= 0 && code < SYS_MAXSYSCALL) ? freebsd32_syscallnames[code] : "???"); 238 KASSERT(td->td_critnest == 0, 239 ("System call %s returning in a critical section", 240 (code >= 0 && code < SYS_MAXSYSCALL) ? freebsd32_syscallnames[code] : "???")); 241 KASSERT(td->td_locks == 0, 242 ("System call %s returning with %d locks held", 243 (code >= 0 && code < SYS_MAXSYSCALL) ? freebsd32_syscallnames[code] : "???", 244 td->td_locks)); 245 246 /* 247 * Handle reschedule and other end-of-syscall issues 248 */ |
| 249 userret(td, &frame); | 249 userret(td, frame); |
| 250 251 CTR4(KTR_SYSC, "syscall exit thread %p pid %d proc %s code %d", td, 252 td->td_proc->p_pid, td->td_proc->p_comm, code); 253#ifdef KTRACE 254 if (KTRPOINT(td, KTR_SYSRET)) 255 ktrsysret(code, error, td->td_retval[0]); 256#endif 257 --- 27 unchanged lines hidden --- | 250 251 CTR4(KTR_SYSC, "syscall exit thread %p pid %d proc %s code %d", td, 252 td->td_proc->p_pid, td->td_proc->p_comm, code); 253#ifdef KTRACE 254 if (KTRPOINT(td, KTR_SYSRET)) 255 ktrsysret(code, error, td->td_retval[0]); 256#endif 257 --- 27 unchanged lines hidden --- |