1 files changed, 110 insertions, 0 deletions
diff --git a/ldt.c b/ldt.c
new file mode 100644
index 0000000..0376d2b
--- /dev/null
+++ b/ldt.c
@@ -0,0 +1,110 @@
+#include "defs.h"
+
+#if defined I386 || defined X86_64 || defined X32
+
+# include <asm/ldt.h>
+
+void
+print_user_desc(struct tcb *tcp, long addr)
+{
+	struct user_desc desc;
+
+	if (umove(tcp, addr, &desc) < 0) {
+		tprintf("%lx", addr);
+		return;
+	}
+
+	if (!verbose(tcp)) {
+		tprintf("{entry_number:%d, ...}", desc.entry_number);
+		return;
+	}
+
+	tprintf("{entry_number:%d, "
+		"base_addr:%#08x, "
+		"limit:%d, "
+		"seg_32bit:%d, "
+		"contents:%d, "
+		"read_exec_only:%d, "
+		"limit_in_pages:%d, "
+		"seg_not_present:%d, "
+		"useable:%d}",
+		desc.entry_number,
+		desc.base_addr,
+		desc.limit,
+		desc.seg_32bit,
+		desc.contents,
+		desc.read_exec_only,
+		desc.limit_in_pages,
+		desc.seg_not_present,
+		desc.useable);
+}
+
+int
+sys_modify_ldt(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		tprintf("%ld, ", tcp->u_arg[0]);
+		if (tcp->u_arg[1] == 0
+		    || tcp->u_arg[2] != sizeof(struct user_desc)) {
+			tprintf("%lx", tcp->u_arg[1]);
+		} else {
+			print_user_desc(tcp, tcp->u_arg[1]);
+		}
+		tprintf(", %lu", tcp->u_arg[2]);
+	}
+	return 0;
+}
+
+int
+sys_set_thread_area(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		print_user_desc(tcp, tcp->u_arg[0]);
+	} else {
+		struct user_desc desc;
+
+		if (syserror(tcp) || umove(tcp, tcp->u_arg[0], &desc) < 0) {
+			/* returned entry_number is not available */
+		} else {
+			static char outstr[32];
+
+			sprintf(outstr, "entry_number:%d", desc.entry_number);
+			tcp->auxstr = outstr;
+			return RVAL_STR;
+		}
+	}
+	return 0;
+}
+
+int
+sys_get_thread_area(struct tcb *tcp)
+{
+	if (exiting(tcp)) {
+		if (syserror(tcp))
+			tprintf("%lx", tcp->u_arg[0]);
+		else
+			print_user_desc(tcp, tcp->u_arg[0]);
+	}
+	return 0;
+}
+
+#endif /* I386 || X86_64 || X32 */
+
+#if defined(M68K) || defined(MIPS)
+int
+sys_set_thread_area(struct tcb *tcp)
+{
+	if (entering(tcp))
+		tprintf("%#lx", tcp->u_arg[0]);
+	return 0;
+
+}
+#endif
+
+#if defined(M68K)
+int
+sys_get_thread_area(struct tcb *tcp)
+{
+	return RVAL_HEX;
+}
+#endif