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sdiff udiff text old ( 171055 ) new ( 179051 )
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amd64-linux32.c (171055) amd64-linux32.c (179051)
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-linux32.c 171055 2007-06-26 22:42:37Z delphij $";
34 "$FreeBSD: head/usr.bin/truss/amd64-linux32.c 179051 2008-05-16 15:34:06Z jhb $";
35#endif /* not lint */
36
37/*
38 * Linux/i386-specific system call handling. Given how much of this code
39 * is taken from the freebsd equivalent, I can probably put even more of
40 * it in support routines that can be used by any personality support.
41 */
42

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56#include <unistd.h>
57
58#include "truss.h"
59#include "syscall.h"
60#include "extern.h"
61
62static int cpid = -1;
63
35#endif /* not lint */
36
37/*
38 * Linux/i386-specific system call handling. Given how much of this code
39 * is taken from the freebsd equivalent, I can probably put even more of
40 * it in support routines that can be used by any personality support.
41 */
42

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56#include <unistd.h>
57
58#include "truss.h"
59#include "syscall.h"
60#include "extern.h"
61
62static int cpid = -1;
63
64#include "linux_syscalls.h"
64#include "linux32_syscalls.h"
65
66static int nsyscalls =
65
66static int nsyscalls =
67 sizeof(linux_syscallnames) / sizeof(linux_syscallnames[0]);
67 sizeof(linux32_syscallnames) / sizeof(linux32_syscallnames[0]);
68
69/*
70 * This is what this particular file uses to keep track of a system call.
71 * It is probably not quite sufficient -- I can probably use the same
72 * structure for the various syscall personalities, and I also probably
73 * need to nest system calls (for signal handlers).
74 *
75 * 'struct syscall' describes the system call; it may be NULL, however,

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100/*
101 * Called when a process has entered a system call. nargs is the
102 * number of words, not number of arguments (a necessary distinction
103 * in some cases). Note that if the STOPEVENT() code in i386/i386/trap.c
104 * is ever changed these functions need to keep up.
105 */
106
107void
68
69/*
70 * This is what this particular file uses to keep track of a system call.
71 * It is probably not quite sufficient -- I can probably use the same
72 * structure for the various syscall personalities, and I also probably
73 * need to nest system calls (for signal handlers).
74 *
75 * 'struct syscall' describes the system call; it may be NULL, however,

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100/*
101 * Called when a process has entered a system call. nargs is the
102 * number of words, not number of arguments (a necessary distinction
103 * in some cases). Note that if the STOPEVENT() code in i386/i386/trap.c
104 * is ever changed these functions need to keep up.
105 */
106
107void
108i386_linux_syscall_entry(struct trussinfo *trussinfo, int nargs) {
108amd64_linux32_syscall_entry(struct trussinfo *trussinfo, int nargs) {
109 struct reg regs;
110 int syscall_num;
111 int i;
112 struct syscall *sc;
113
114 cpid = trussinfo->curthread->tid;
115
116 clear_fsc();
117
118 if (ptrace(PT_GETREGS, cpid, (caddr_t)&regs, 0) < 0)
119 {
120 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
121 return;
122 }
109 struct reg regs;
110 int syscall_num;
111 int i;
112 struct syscall *sc;
113
114 cpid = trussinfo->curthread->tid;
115
116 clear_fsc();
117
118 if (ptrace(PT_GETREGS, cpid, (caddr_t)&regs, 0) < 0)
119 {
120 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
121 return;
122 }
123 syscall_num = regs.r_eax;
123 syscall_num = regs.r_rax;
124
125 fsc.number = syscall_num;
126 fsc.name =
124
125 fsc.number = syscall_num;
126 fsc.name =
127 (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : linux_syscallnames[syscall_num];
127 (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : linux32_syscallnames[syscall_num];
128 if (!fsc.name) {
129 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
130 }
131
132 if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
133 && ((!strcmp(fsc.name, "linux_fork")
134 || !strcmp(fsc.name, "linux_vfork"))))
135 {

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142 /*
143 * Linux passes syscall arguments in registers, not
144 * on the stack. Fortunately, we've got access to the
145 * register set. Note that we don't bother checking the
146 * number of arguments. And what does linux do for syscalls
147 * that have more than five arguments?
148 */
149
128 if (!fsc.name) {
129 fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
130 }
131
132 if (fsc.name && (trussinfo->flags & FOLLOWFORKS)
133 && ((!strcmp(fsc.name, "linux_fork")
134 || !strcmp(fsc.name, "linux_vfork"))))
135 {

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142 /*
143 * Linux passes syscall arguments in registers, not
144 * on the stack. Fortunately, we've got access to the
145 * register set. Note that we don't bother checking the
146 * number of arguments. And what does linux do for syscalls
147 * that have more than five arguments?
148 */
149
150 fsc.args[0] = regs.r_ebx;
151 fsc.args[1] = regs.r_ecx;
152 fsc.args[2] = regs.r_edx;
153 fsc.args[3] = regs.r_esi;
154 fsc.args[4] = regs.r_edi;
150 fsc.args[0] = regs.r_rbx;
151 fsc.args[1] = regs.r_rcx;
152 fsc.args[2] = regs.r_rdx;
153 fsc.args[3] = regs.r_rsi;
154 fsc.args[4] = regs.r_rdi;
155
156 sc = get_syscall(fsc.name);
157 if (sc) {
158 fsc.nargs = sc->nargs;
159 } else {
160#if DEBUG
161 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
162 fsc.name, nargs);

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237 -90, -91, -92, -93, -94, -95, -96, -97, -98, -99,
238 -100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
239 -110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
240 -116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
241 -6,
242};
243
244long
155
156 sc = get_syscall(fsc.name);
157 if (sc) {
158 fsc.nargs = sc->nargs;
159 } else {
160#if DEBUG
161 fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n",
162 fsc.name, nargs);

--- 74 unchanged lines hidden (view full) ---

237 -90, -91, -92, -93, -94, -95, -96, -97, -98, -99,
238 -100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
239 -110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
240 -116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
241 -6,
242};
243
244long
245i386_linux_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused)
245amd64_linux32_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused)
246{
247 struct reg regs;
248 long retval;
249 int i;
250 int errorp;
251 struct syscall *sc;
252
253 if (fsc.name == NULL)
254 return (-1);
255
256 cpid = trussinfo->curthread->tid;
257 if (ptrace(PT_GETREGS, cpid, (caddr_t)&regs, 0) < 0)
258 {
259 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
260 return (-1);
261 }
262
246{
247 struct reg regs;
248 long retval;
249 int i;
250 int errorp;
251 struct syscall *sc;
252
253 if (fsc.name == NULL)
254 return (-1);
255
256 cpid = trussinfo->curthread->tid;
257 if (ptrace(PT_GETREGS, cpid, (caddr_t)&regs, 0) < 0)
258 {
259 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
260 return (-1);
261 }
262
263 retval = regs.r_eax;
264 errorp = !!(regs.r_eflags & PSL_C);
263 retval = regs.r_rax;
264 errorp = !!(regs.r_rflags & PSL_C);
265
266 /*
267 * This code, while simpler than the initial versions I used, could
268 * stand some significant cleaning.
269 */
270
271 sc = fsc.sc;
272 if (!sc) {

--- 44 unchanged lines hidden --- 		265
266 /*
267 * This code, while simpler than the initial versions I used, could
268 * stand some significant cleaning.
269 */
270
271 sc = fsc.sc;
272 if (!sc) {

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