blob: feba59b20017ba8600314dae38755ae297616dea [file] [log] [blame]
#include "defs.h"
#include "xlat/sigaltstack_flags.h"
static void
print_stack_t(struct tcb *tcp, unsigned long addr)
{
stack_t ss;
int r;
if (!addr) {
tprints("NULL");
return;
}
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
struct {
uint32_t ss_sp;
int32_t ss_flags;
uint32_t ss_size;
} ss32;
r = umove(tcp, addr, &ss32);
if (r >= 0) {
memset(&ss, 0, sizeof(ss));
ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
ss.ss_flags = ss32.ss_flags;
ss.ss_size = (unsigned long) ss32.ss_size;
}
} else
#endif
{
r = umove(tcp, addr, &ss);
}
if (r < 0) {
tprintf("%#lx", addr);
} else {
tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
}
}
int
sys_sigaltstack(struct tcb *tcp)
{
if (entering(tcp)) {
print_stack_t(tcp, tcp->u_arg[0]);
} else {
tprints(", ");
print_stack_t(tcp, tcp->u_arg[1]);
}
return 0;
}