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/*
** S390 specific part of trace.c
**
** Other routines are in ../trace.c and need to be combined
** at link time with this code.
**
** S/390 version
** Copyright (C) 2001 IBM Poughkeepsie, IBM Corporation
*/
#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
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)
{
long pswa;
long svcinst;
long svcno;
long svcop;
if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
pswa = ptrace(PTRACE_PEEKUSER, proc->pid, PT_PSWADDR, 0);
svcinst =
ptrace(PTRACE_PEEKTEXT, proc->pid, (char *)(pswa - 4), 0);
svcop = (svcinst >> 8) & 0xFF;
svcno = svcinst & 0xFF;
*sysnum = svcno;
if (*sysnum == -1) {
return 0;
}
if (svcop == 0 && svcno == 1) {
/* Breakpoint was hit... */
return 0;
}
if (svcop == 10 && *sysnum >= 0) {
/* System call was encountered... */
if (proc->callstack_depth > 0 &&
proc->callstack[proc->callstack_depth -
1].is_syscall) {
return 2;
} else {
return 1;
}
} else {
/* Unknown trap was encountered... */
return 0;
}
}
/* Unknown status... */
return 0;
}
long gimme_arg(enum tof type, struct process *proc, int arg_num)
{
switch (arg_num) {
case -1: /* return value */
return ptrace(PTRACE_PEEKUSER, proc->pid, PT_GPR2, 0);
case 0:
return ptrace(PTRACE_PEEKUSER, proc->pid, PT_ORIGGPR2, 0);
case 1:
return ptrace(PTRACE_PEEKUSER, proc->pid, PT_GPR3, 0);
case 2:
return ptrace(PTRACE_PEEKUSER, proc->pid, PT_GPR4, 0);
case 3:
return ptrace(PTRACE_PEEKUSER, proc->pid, PT_GPR5, 0);
case 4:
return ptrace(PTRACE_PEEKUSER, proc->pid, PT_GPR6, 0);
default:
fprintf(stderr, "gimme_arg called with wrong arguments\n");
exit(2);
}
}
void save_register_args(enum tof type, struct process *proc)
{
}
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