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#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <sys/ptrace.h>
#include <asm/ptrace.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
/* 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) {
*sysnum = ptrace(PTRACE_PEEKUSER, proc->pid, 4*ORIG_EAX, 0);
if (*sysnum>=0) {
if (proc->current_syscall!=*sysnum) {
return 1;
} else {
return 2;
}
}
}
return 0;
}
void continue_after_breakpoint(struct process *proc, struct breakpoint * sbp, int delete_it)
{
delete_breakpoint(proc->pid, sbp);
ptrace(PTRACE_POKEUSER, proc->pid, 4*EIP, sbp->addr);
if (delete_it) {
continue_process(proc->pid);
} else {
proc->breakpoint_being_enabled = sbp;
ptrace(PTRACE_SINGLESTEP, proc->pid, 0, 0);
}
}
long gimme_arg(enum tof type, struct process * proc, int arg_num)
{
if (arg_num==-1) { /* return value */
return ptrace(PTRACE_PEEKUSER, proc->pid, 4*EAX, 0);
}
if (type==LT_TOF_FUNCTION) {
return ptrace(PTRACE_PEEKTEXT, proc->pid, proc->stack_pointer+4*(arg_num+1), 0);
} else if (type==LT_TOF_SYSCALL) {
#if 0
switch(arg_num) {
case 0: return ptrace(PTRACE_PEEKUSER, proc->pid, 4*EBX, 0);
case 1: return ptrace(PTRACE_PEEKUSER, proc->pid, 4*ECX, 0);
case 2: return ptrace(PTRACE_PEEKUSER, proc->pid, 4*EDX, 0);
case 3: return ptrace(PTRACE_PEEKUSER, proc->pid, 4*ESI, 0);
case 4: return ptrace(PTRACE_PEEKUSER, proc->pid, 4*EDI, 0);
default:
fprintf(stderr, "gimme_arg called with wrong arguments\n");
exit(2);
}
#else
return ptrace(PTRACE_PEEKUSER, proc->pid, 4*arg_num, 0);
#endif
} else {
fprintf(stderr, "gimme_arg called with wrong arguments\n");
exit(1);
}
return 0;
}
int umovestr(struct process * proc, void * addr, int len, void * laddr)
{
long a;
int i;
int offset=0;
while(offset<len) {
a = ptrace(PTRACE_PEEKTEXT, proc->pid, addr+offset, 0);
for(i=0; i<sizeof(long); i++) {
if (((char*)&a)[i] && offset+i < len) {
*(char *)(laddr+offset+i) = ((char*)&a)[i];
} else {
*(char *)(laddr+offset+i) = '\0';
return 0;
}
}
offset += sizeof(long);
}
*(char *)(laddr+offset) = '\0';
return 0;
}
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