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#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/ptrace.h>
#include <sys/reg.h>
#include "ltrace.h"
#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
# define PTRACE_PEEKUSER PTRACE_PEEKUSR
#endif
#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
# define PTRACE_POKEUSER PTRACE_POKEUSR
#endif
void get_arch_dep(struct process *proc)
{
unsigned long cs;
if (proc->arch_ptr)
return;
cs = ptrace(PTRACE_PEEKUSER, proc->pid, 8 * CS, 0);
if (cs == 0x23) {
proc->mask_32bit = 1;
proc->personality = 1;
}
proc->arch_ptr = (void *)1;
}
/* Returns 1 if syscall, 2 if sysret, 0 otherwise.
*/
int syscall_p(struct process *proc, int status, int *sysnum)
{
if (WIFSTOPPED(status)
&& WSTOPSIG(status) == (SIGTRAP | proc->tracesysgood)) {
*sysnum = ptrace(PTRACE_PEEKUSER, proc->pid, 8 * ORIG_RAX, 0);
if (proc->callstack_depth > 0 &&
proc->callstack[proc->callstack_depth - 1].is_syscall) {
return 2;
}
if (*sysnum >= 0) {
return 1;
}
}
return 0;
}
static unsigned int
gimme_arg32(enum tof type, struct process *proc, int arg_num)
{
if (arg_num == -1) { /* return value */
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RAX, 0);
}
if (type == LT_TOF_FUNCTION || type == LT_TOF_FUNCTIONR) {
return ptrace(PTRACE_PEEKTEXT, proc->pid,
proc->stack_pointer + 4 * (arg_num + 1), 0);
} else if (type == LT_TOF_SYSCALL || type == LT_TOF_SYSCALLR) {
switch (arg_num) {
case 0:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RBX, 0);
case 1:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RCX, 0);
case 2:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RDX, 0);
case 3:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RSI, 0);
case 4:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RDI, 0);
case 5:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RBP, 0);
default:
fprintf(stderr,
"gimme_arg32 called with wrong arguments\n");
exit(2);
}
}
fprintf(stderr, "gimme_arg called with wrong arguments\n");
exit(1);
}
long gimme_arg(enum tof type, struct process *proc, arg_type_info *info)
{
int arg_num = info->arg_num;
if (proc->mask_32bit)
return (unsigned int)gimme_arg32(type, proc, arg_num);
if (arg_num == -1) { /* return value */
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RAX, 0);
}
if (type == LT_TOF_FUNCTION || type == LT_TOF_FUNCTIONR) {
switch (arg_num) {
case 0:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RDI, 0);
case 1:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RSI, 0);
case 2:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RDX, 0);
case 3:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RCX, 0);
case 4:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * R8, 0);
case 5:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * R9, 0);
default:
return ptrace(PTRACE_PEEKTEXT, proc->pid,
proc->stack_pointer + 8 * (arg_num - 6 +
1), 0);
}
} else if (type == LT_TOF_SYSCALL || LT_TOF_SYSCALLR) {
switch (arg_num) {
case 0:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RDI, 0);
case 1:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RSI, 0);
case 2:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * RDX, 0);
case 3:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * R10, 0);
case 4:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * R8, 0);
case 5:
return ptrace(PTRACE_PEEKUSER, proc->pid, 8 * R9, 0);
default:
fprintf(stderr,
"gimme_arg called with wrong arguments\n");
exit(2);
}
} else {
fprintf(stderr, "gimme_arg called with wrong arguments\n");
exit(1);
}
return 0;
}
void save_register_args(enum tof type, struct process *proc)
{
}
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