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#if HAVE_CONFIG_H
#include "config.h"
#endif
#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
/* syscall tracing protocol: ArmLinux
on the way in, ip is 0
on the way out, ip is non-zero
*/
#define off_r0 0
#define off_ip 48
#define off_pc 60
void get_arch_dep(struct process *proc)
{
}
/* 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) {
/* get the user's pc (plus 8) */
int pc = ptrace(PTRACE_PEEKUSER, proc->pid, off_pc, 0);
/* fetch the SWI instruction */
int insn = ptrace(PTRACE_PEEKTEXT, proc->pid, pc - 4, 0);
*sysnum = insn & 0xFFFF;
/* if it is a syscall, return 1 or 2 */
if ((insn & 0xFFFF0000) == 0xef900000) {
return ptrace(PTRACE_PEEKUSER, proc->pid, off_ip,
0) ? 2 : 1;
}
}
return 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, off_r0, 0);
}
/* deal with the ARM calling conventions */
if (type == LT_TOF_FUNCTION || type == LT_TOF_FUNCTIONR) {
if (arg_num < 4) {
return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * arg_num,
0);
} else {
return ptrace(PTRACE_PEEKDATA, proc->pid,
proc->stack_pointer + 4 * (arg_num - 4),
0);
}
} else if (type == LT_TOF_SYSCALL || type == LT_TOF_SYSCALLR) {
if (arg_num < 5) {
return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * arg_num,
0);
} else {
return ptrace(PTRACE_PEEKDATA, proc->pid,
proc->stack_pointer + 4 * (arg_num - 5),
0);
}
} 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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