strace/execve.c
Dmitry V. Levin 7e56b4e5ae execve.c: make use of RVAL_DECODED
* execve.c (sys_execve, sys_execv): Update for RVAL_DECODED.
2015-07-20 22:03:07 +00:00

86 lines
1.5 KiB
C

#include "defs.h"
static void
printargv(struct tcb *tcp, long addr)
{
union {
unsigned int p32;
unsigned long p64;
char data[sizeof(long)];
} cp;
const char *sep;
unsigned int n = 0;
const unsigned wordsize = current_wordsize;
cp.p64 = 1;
for (sep = ""; !abbrev(tcp) || n < max_strlen / 2; sep = ", ", ++n) {
if (umoven_or_printaddr(tcp, addr, wordsize, cp.data))
return;
if (wordsize == 4)
cp.p64 = cp.p32;
if (cp.p64 == 0)
break;
tprints(sep);
printstr(tcp, cp.p64, -1);
addr += wordsize;
}
if (cp.p64)
tprintf("%s...", sep);
}
static void
printargc(const char *fmt, struct tcb *tcp, long addr)
{
int count;
char *cp;
for (count = 0; umove(tcp, addr, &cp) >= 0 && cp != NULL; count++) {
addr += sizeof(char *);
}
tprintf(fmt, count, count == 1 ? "" : "s");
}
SYS_FUNC(execve)
{
printpath(tcp, tcp->u_arg[0]);
tprints(", ");
if (!tcp->u_arg[1] || !verbose(tcp))
printaddr(tcp->u_arg[1]);
else {
tprints("[");
printargv(tcp, tcp->u_arg[1]);
tprints("]");
}
tprints(", ");
if (!tcp->u_arg[2] || !verbose(tcp))
printaddr(tcp->u_arg[2]);
else if (abbrev(tcp))
printargc("[/* %d var%s */]", tcp, tcp->u_arg[2]);
else {
tprints("[");
printargv(tcp, tcp->u_arg[2]);
tprints("]");
}
return RVAL_DECODED;
}
#if defined(SPARC) || defined(SPARC64)
SYS_FUNC(execv)
{
printpath(tcp, tcp->u_arg[0]);
tprints(", ");
if (!tcp->u_arg[1] || !verbose(tcp))
printaddr(tcp->u_arg[1]);
else {
tprints("[");
printargv(tcp, tcp->u_arg[1]);
tprints("]");
}
return RVAL_DECODED;
}
#endif /* SPARC || SPARC64 */