From: Roland McGrath <roland@redhat.com>
Date: Sun, 15 Dec 2002 23:58:17 +0000 (+0000)
Subject: 2002-12-15  Roland McGrath  <roland@redhat.com>
X-Git-Tag: v4.5.18~965
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=34e4a6984c95cb6757c80e414e1116ee254075cf;p=strace

2002-12-15  Roland McGrath  <roland@redhat.com>

	* mem.c: Add sys_{get,set}_thread_area.
	* linux/syscall.h: Declare them.
	* linux/syscallent.h: Update the table for these.
	* linux/dummy.h (sys_modify_ldt): Define only #ifndef I386.
	(sys_get_thread_area, sys_set_thread_area): New macros #ifndef I386.
---

diff --git a/mem.c b/mem.c
index fbcc49b9..295238db 100644
--- a/mem.c
+++ b/mem.c
@@ -505,6 +505,28 @@ struct tcb *tcp;
 }
 
 #if defined(LINUX) && defined(__i386__)
+static void
+print_ldt_entry (ldt_entry)
+struct modify_ldt_ldt_s *ldt_entry;
+{
+	tprintf("base_addr:%#08lx, "
+		"limit:%d, "
+		"seg_32bit:%d, "
+		"contents:%d, "
+		"read_exec_only:%d, "
+		"limit_in_pages:%d, "
+		"seg_not_present:%d, "
+		"useable:%d}",
+		ldt_entry->base_addr,
+		ldt_entry->limit,
+		ldt_entry->seg_32bit,
+		ldt_entry->contents,
+		ldt_entry->read_exec_only,
+		ldt_entry->limit_in_pages,
+		ldt_entry->seg_not_present,
+		ldt_entry->useable);
+}
+
 int
 sys_modify_ldt(tcp)
 struct tcb *tcp;
@@ -521,27 +543,62 @@ struct tcb *tcp;
 			if (!verbose(tcp))
 				tprintf("...}");
 			else {
-				tprintf("base_addr:%#08lx, "
-						"limit:%d, "
-						"seg_32bit:%d, "
-						"contents:%d, "
-						"read_exec_only:%d, "
-						"limit_in_pages:%d, "
-						"seg_not_present:%d, "
-						"useable:%d}",
-						copy.base_addr,
-						copy.limit,
-						copy.seg_32bit,
-						copy.contents,
-						copy.read_exec_only,
-						copy.limit_in_pages,
-						copy.seg_not_present,
-						copy.useable);
+				print_ldt_entry(&copy);
 			}
 		}
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }
+
+int
+sys_set_thread_area(tcp)
+struct tcb *tcp;
+{
+	struct modify_ldt_ldt_s copy;
+	if (entering(tcp)) {
+		if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
+			if (copy.entry_number == -1)
+				tprintf("{entry_number:%d -> ",
+					copy.entry_number);
+			else
+				tprintf("{entry_number:");
+		}
+	} else {
+		if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
+			tprintf("%d, ", copy.entry_number);
+			if (!verbose(tcp))
+				tprintf("...}");
+			else {
+				print_ldt_entry(&copy);
+			}
+		} else {
+			tprintf("%lx", tcp->u_arg[0]);
+		}
+	}
+	return 0;
+			
+}
+
+int
+sys_get_thread_area(tcp)
+struct tcb *tcp;
+{
+	struct modify_ldt_ldt_s copy;
+	if (exiting(tcp)) {
+		if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
+			tprintf("{entry_number:%d, ", copy.entry_number);
+			if (!verbose(tcp))
+				tprintf("...}");
+			else {
+				print_ldt_entry(&copy);
+			}
+		} else {
+			tprintf("%lx", tcp->u_arg[0]);
+		}
+	}
+	return 0;
+			
+}
 #endif /* LINUX && __i386__ */