amd64-fbsd32.c (171646) | amd64-fbsd32.c (179051) |
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1/* 2 * Copryight 1997 Sean Eric Fagan 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 17 unchanged lines hidden (view full) --- 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#ifndef lint 33static const char rcsid[] = | 1/* 2 * Copryight 1997 Sean Eric Fagan 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 17 unchanged lines hidden (view full) --- 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#ifndef lint 33static const char rcsid[] = |
34 "$FreeBSD: head/usr.bin/truss/amd64-fbsd32.c 171646 2007-07-28 23:15:04Z marcel $"; | 34 "$FreeBSD: head/usr.bin/truss/amd64-fbsd32.c 179051 2008-05-16 15:34:06Z jhb $"; |
35#endif /* not lint */ 36 37/* 38 * FreeBSD/i386-specific system call handling. This is probably the most 39 * complex part of the entire truss program, although I've got lots of 40 * it handled relatively cleanly now. The system call names are generated 41 * automatically, thanks to /usr/src/sys/kern/syscalls.master. The 42 * names used for the various structures are confusing, I sadly admit. --- 16 unchanged lines hidden (view full) --- 59#include <unistd.h> 60 61#include "truss.h" 62#include "syscall.h" 63#include "extern.h" 64 65static int cpid = -1; 66 | 35#endif /* not lint */ 36 37/* 38 * FreeBSD/i386-specific system call handling. This is probably the most 39 * complex part of the entire truss program, although I've got lots of 40 * it handled relatively cleanly now. The system call names are generated 41 * automatically, thanks to /usr/src/sys/kern/syscalls.master. The 42 * names used for the various structures are confusing, I sadly admit. --- 16 unchanged lines hidden (view full) --- 59#include <unistd.h> 60 61#include "truss.h" 62#include "syscall.h" 63#include "extern.h" 64 65static int cpid = -1; 66 |
67#include "syscalls.h" | 67#include "freebsd32_syscalls.h" |
68 | 68 |
69static int nsyscalls = sizeof(syscallnames) / sizeof(syscallnames[0]); | 69static int nsyscalls = sizeof(freebsd32_syscallnames) / 70 sizeof(freebsd32_syscallnames[0]); |
70 71/* 72 * This is what this particular file uses to keep track of a system call. 73 * It is probably not quite sufficient -- I can probably use the same 74 * structure for the various syscall personalities, and I also probably 75 * need to nest system calls (for signal handlers). 76 * 77 * 'struct syscall' describes the system call; it may be NULL, however, 78 * if we don't know about this particular system call yet. 79 */ | 71 72/* 73 * This is what this particular file uses to keep track of a system call. 74 * It is probably not quite sufficient -- I can probably use the same 75 * structure for the various syscall personalities, and I also probably 76 * need to nest system calls (for signal handlers). 77 * 78 * 'struct syscall' describes the system call; it may be NULL, however, 79 * if we don't know about this particular system call yet. 80 */ |
80static struct freebsd_syscall { | 81static struct freebsd32_syscall { |
81 struct syscall *sc; 82 const char *name; 83 int number; 84 unsigned long *args; | 82 struct syscall *sc; 83 const char *name; 84 int number; 85 unsigned long *args; |
86 unsigned int *args32; |
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85 int nargs; /* number of arguments -- *not* number of words! */ 86 char **s_args; /* the printable arguments */ 87} fsc; 88 89/* Clear up and free parts of the fsc structure. */ 90static __inline void 91clear_fsc(void) { 92 if (fsc.args) { 93 free(fsc.args); 94 } | 87 int nargs; /* number of arguments -- *not* number of words! */ 88 char **s_args; /* the printable arguments */ 89} fsc; 90 91/* Clear up and free parts of the fsc structure. */ 92static __inline void 93clear_fsc(void) { 94 if (fsc.args) { 95 free(fsc.args); 96 } |
97 if (fsc.args32) { 98 free(fsc.args32); 99 } |
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95 if (fsc.s_args) { 96 int i; 97 for (i = 0; i < fsc.nargs; i++) 98 if (fsc.s_args[i]) 99 free(fsc.s_args[i]); 100 free(fsc.s_args); 101 } 102 memset(&fsc, 0, sizeof(fsc)); 103} 104 105/* 106 * Called when a process has entered a system call. nargs is the 107 * number of words, not number of arguments (a necessary distinction 108 * in some cases). Note that if the STOPEVENT() code in i386/i386/trap.c 109 * is ever changed these functions need to keep up. 110 */ 111 112void | 100 if (fsc.s_args) { 101 int i; 102 for (i = 0; i < fsc.nargs; i++) 103 if (fsc.s_args[i]) 104 free(fsc.s_args[i]); 105 free(fsc.s_args); 106 } 107 memset(&fsc, 0, sizeof(fsc)); 108} 109 110/* 111 * Called when a process has entered a system call. nargs is the 112 * number of words, not number of arguments (a necessary distinction 113 * in some cases). Note that if the STOPEVENT() code in i386/i386/trap.c 114 * is ever changed these functions need to keep up. 115 */ 116 117void |
113i386_syscall_entry(struct trussinfo *trussinfo, int nargs) { | 118amd64_fbsd32_syscall_entry(struct trussinfo *trussinfo, int nargs) { |
114 struct reg regs; 115 int syscall_num; 116 int i; | 119 struct reg regs; 120 int syscall_num; 121 int i; |
117 unsigned int parm_offset; | 122 unsigned long parm_offset; |
118 struct syscall *sc = NULL; 119 struct ptrace_io_desc iorequest; 120 cpid = trussinfo->curthread->tid; 121 122 clear_fsc(); 123 124 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) 125 { 126 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); 127 return; 128 } | 123 struct syscall *sc = NULL; 124 struct ptrace_io_desc iorequest; 125 cpid = trussinfo->curthread->tid; 126 127 clear_fsc(); 128 129 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) 130 { 131 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); 132 return; 133 } |
129 parm_offset = regs.r_esp + sizeof(int); | 134 parm_offset = regs.r_rsp + sizeof(int); |
130 131 /* 132 * FreeBSD has two special kinds of system call redirctions -- 133 * SYS_syscall, and SYS___syscall. The former is the old syscall() 134 * routine, basicly; the latter is for quad-aligned arguments. 135 */ | 135 136 /* 137 * FreeBSD has two special kinds of system call redirctions -- 138 * SYS_syscall, and SYS___syscall. The former is the old syscall() 139 * routine, basicly; the latter is for quad-aligned arguments. 140 */ |
136 syscall_num = regs.r_eax; | 141 syscall_num = regs.r_rax; |
137 switch (syscall_num) { 138 case SYS_syscall: 139 syscall_num = ptrace(PT_READ_D, cpid, (caddr_t)parm_offset, 0); 140 parm_offset += sizeof(int); 141 break; 142 case SYS___syscall: 143 syscall_num = ptrace(PT_READ_D, cpid, (caddr_t)parm_offset, 0); 144 parm_offset += sizeof(quad_t); 145 break; 146 } 147 148 fsc.number = syscall_num; 149 fsc.name = | 142 switch (syscall_num) { 143 case SYS_syscall: 144 syscall_num = ptrace(PT_READ_D, cpid, (caddr_t)parm_offset, 0); 145 parm_offset += sizeof(int); 146 break; 147 case SYS___syscall: 148 syscall_num = ptrace(PT_READ_D, cpid, (caddr_t)parm_offset, 0); 149 parm_offset += sizeof(quad_t); 150 break; 151 } 152 153 fsc.number = syscall_num; 154 fsc.name = |
150 (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : syscallnames[syscall_num]; | 155 (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : 156 freebsd32_syscallnames[syscall_num]; |
151 if (!fsc.name) { 152 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num); 153 } 154 155 if (fsc.name && (trussinfo->flags & FOLLOWFORKS) 156 && ((!strcmp(fsc.name, "fork") 157 || !strcmp(fsc.name, "rfork") 158 || !strcmp(fsc.name, "vfork")))) 159 { 160 trussinfo->curthread->in_fork = 1; 161 } 162 163 if (nargs == 0) 164 return; 165 | 157 if (!fsc.name) { 158 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num); 159 } 160 161 if (fsc.name && (trussinfo->flags & FOLLOWFORKS) 162 && ((!strcmp(fsc.name, "fork") 163 || !strcmp(fsc.name, "rfork") 164 || !strcmp(fsc.name, "vfork")))) 165 { 166 trussinfo->curthread->in_fork = 1; 167 } 168 169 if (nargs == 0) 170 return; 171 |
166 fsc.args = malloc((1+nargs) * sizeof(unsigned long)); | 172 fsc.args32 = malloc((1+nargs) * sizeof(unsigned int)); |
167 iorequest.piod_op = PIOD_READ_D; 168 iorequest.piod_offs = (void *)parm_offset; | 173 iorequest.piod_op = PIOD_READ_D; 174 iorequest.piod_offs = (void *)parm_offset; |
169 iorequest.piod_addr = fsc.args; 170 iorequest.piod_len = (1+nargs) * sizeof(unsigned long); | 175 iorequest.piod_addr = fsc.args32; 176 iorequest.piod_len = (1+nargs) * sizeof(unsigned int); |
171 ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0); 172 if (iorequest.piod_len == 0) 173 return; 174 | 177 ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0); 178 if (iorequest.piod_len == 0) 179 return; 180 |
181 fsc.args = malloc((1+nargs) * sizeof(unsigned long)); 182 for (i = 0; i < nargs + 1; i++) 183 fsc.args[i] = fsc.args32[i]; 184 |
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175 if (fsc.name) 176 sc = get_syscall(fsc.name); 177 if (sc) { 178 fsc.nargs = sc->nargs; 179 } else { 180#if DEBUG 181 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n", 182 fsc.name, nargs); --- 35 unchanged lines hidden (view full) --- 218#endif 219 } 220 221#if DEBUG 222 fprintf(trussinfo->outfile, "\n"); 223#endif 224 225 if (fsc.name != NULL && | 185 if (fsc.name) 186 sc = get_syscall(fsc.name); 187 if (sc) { 188 fsc.nargs = sc->nargs; 189 } else { 190#if DEBUG 191 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n", 192 fsc.name, nargs); --- 35 unchanged lines hidden (view full) --- 228#endif 229 } 230 231#if DEBUG 232 fprintf(trussinfo->outfile, "\n"); 233#endif 234 235 if (fsc.name != NULL && |
226 (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) { | 236 (!strcmp(fsc.name, "freebsd32_execve") || !strcmp(fsc.name, "exit"))) { |
227 228 /* XXX 229 * This could be done in a more general 230 * manner but it still wouldn't be very pretty. 231 */ | 237 238 /* XXX 239 * This could be done in a more general 240 * manner but it still wouldn't be very pretty. 241 */ |
232 if (!strcmp(fsc.name, "execve")) { | 242 if (!strcmp(fsc.name, "freebsd32_execve")) { |
233 if ((trussinfo->flags & EXECVEARGS) == 0) 234 if (fsc.s_args[1]) { 235 free(fsc.s_args[1]); 236 fsc.s_args[1] = NULL; 237 } 238 if ((trussinfo->flags & EXECVEENVS) == 0) 239 if (fsc.s_args[2]) { 240 free(fsc.s_args[2]); --- 9 unchanged lines hidden (view full) --- 250/* 251 * And when the system call is done, we handle it here. 252 * Currently, no attempt is made to ensure that the system calls 253 * match -- this needs to be fixed (and is, in fact, why S_SCX includes 254 * the sytem call number instead of, say, an error status). 255 */ 256 257long | 243 if ((trussinfo->flags & EXECVEARGS) == 0) 244 if (fsc.s_args[1]) { 245 free(fsc.s_args[1]); 246 fsc.s_args[1] = NULL; 247 } 248 if ((trussinfo->flags & EXECVEENVS) == 0) 249 if (fsc.s_args[2]) { 250 free(fsc.s_args[2]); --- 9 unchanged lines hidden (view full) --- 260/* 261 * And when the system call is done, we handle it here. 262 * Currently, no attempt is made to ensure that the system calls 263 * match -- this needs to be fixed (and is, in fact, why S_SCX includes 264 * the sytem call number instead of, say, an error status). 265 */ 266 267long |
258i386_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) | 268amd64_fbsd32_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) |
259{ 260 struct reg regs; 261 long retval; 262 int i; 263 int errorp; 264 struct syscall *sc; 265 266 if (fsc.name == NULL) 267 return (-1); 268 cpid = trussinfo->curthread->tid; 269 270 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) 271 { 272 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); 273 return (-1); 274 } 275 | 269{ 270 struct reg regs; 271 long retval; 272 int i; 273 int errorp; 274 struct syscall *sc; 275 276 if (fsc.name == NULL) 277 return (-1); 278 cpid = trussinfo->curthread->tid; 279 280 if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) 281 { 282 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); 283 return (-1); 284 } 285 |
276 retval = regs.r_eax; 277 errorp = !!(regs.r_eflags & PSL_C); | 286 retval = regs.r_rax; 287 errorp = !!(regs.r_rflags & PSL_C); |
278 279 /* 280 * This code, while simpler than the initial versions I used, could 281 * stand some significant cleaning. 282 */ 283 284 sc = fsc.sc; 285 if (!sc) { --- 24 unchanged lines hidden (view full) --- 310 * The pipe syscall returns its fds in two registers and has assembly glue 311 * to provide the libc API, so it cannot be handled like regular syscalls. 312 * The nargs check is so we don't have to do yet another strcmp on every 313 * syscall. 314 */ 315 if (!errorp && fsc.nargs == 0 && fsc.name && strcmp(fsc.name, "pipe") == 0) { 316 fsc.nargs = 1; 317 fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*)); | 288 289 /* 290 * This code, while simpler than the initial versions I used, could 291 * stand some significant cleaning. 292 */ 293 294 sc = fsc.sc; 295 if (!sc) { --- 24 unchanged lines hidden (view full) --- 320 * The pipe syscall returns its fds in two registers and has assembly glue 321 * to provide the libc API, so it cannot be handled like regular syscalls. 322 * The nargs check is so we don't have to do yet another strcmp on every 323 * syscall. 324 */ 325 if (!errorp && fsc.nargs == 0 && fsc.name && strcmp(fsc.name, "pipe") == 0) { 326 fsc.nargs = 1; 327 fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*)); |
318 asprintf(&fsc.s_args[0], "[%d,%d]", (int)retval, regs.r_edx); | 328 asprintf(&fsc.s_args[0], "[%d,%d]", (int)retval, (int)regs.r_rdx); |
319 retval = 0; 320 } 321 322 if (fsc.name != NULL && | 329 retval = 0; 330 } 331 332 if (fsc.name != NULL && |
323 (!strcmp(fsc.name, "execve") || !strcmp(fsc.name, "exit"))) { | 333 (!strcmp(fsc.name, "freebsd32_execve") || !strcmp(fsc.name, "exit"))) { |
324 trussinfo->curthread->in_syscall = 1; 325 } 326 327 /* 328 * It would probably be a good idea to merge the error handling, 329 * but that complicates things considerably. 330 */ 331 332 print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, retval); 333 clear_fsc(); 334 335 return (retval); 336} | 334 trussinfo->curthread->in_syscall = 1; 335 } 336 337 /* 338 * It would probably be a good idea to merge the error handling, 339 * but that complicates things considerably. 340 */ 341 342 print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, retval); 343 clear_fsc(); 344 345 return (retval); 346} |