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#include <errno.h>
#include <sys/ptrace.h>
#include <asm/ldt.h>
#include "sysdep/tls.h"
#include "uml-config.h"
/* TLS support - we basically rely on the host's one.*/
/* In TT mode, this should be called only by the tracing thread, and makes sense
* only for PTRACE_SET_THREAD_AREA. In SKAS mode, it's used normally.
*
*/
#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 25
#endif
#ifndef PTRACE_SET_THREAD_AREA
#define PTRACE_SET_THREAD_AREA 26
#endif
int os_set_thread_area(user_desc_t *info, int pid)
{
int ret;
ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number,
(unsigned long) info);
if (ret < 0)
ret = -errno;
return ret;
}
#ifdef UML_CONFIG_MODE_SKAS
int os_get_thread_area(user_desc_t *info, int pid)
{
int ret;
ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number,
(unsigned long) info);
if (ret < 0)
ret = -errno;
return ret;
}
#endif
#ifdef UML_CONFIG_MODE_TT
#include "linux/unistd.h"
int do_set_thread_area_tt(user_desc_t *info)
{
int ret;
ret = syscall(__NR_set_thread_area, info);
if (ret < 0) {
ret = -errno;
}
return ret;
}
int do_get_thread_area_tt(user_desc_t *info)
{
int ret;
ret = syscall(__NR_get_thread_area, info);
if (ret < 0) {
ret = -errno;
}
return ret;
}
#endif /* UML_CONFIG_MODE_TT */
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