---

yaml
---
r: 113373
b: refs/heads/master
c: 325af5f
h: refs/heads/master
i:
  113371: 2fbe277
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9f482807a6bd7e2aa1ed0d8cfc48463ec4ca3568
+refs/heads/master: 325af5fb1418c79953db0954556de048e061d8b6

trunk/arch/x86/kernel/i387.c

@@ -468,23 +468,9 @@ static int save_i387_fxsave(struct _fpstate_ia32 __user *buf)
 
 static int save_i387_xsave(void __user *buf)
 {
-	struct task_struct *tsk = current;
 	struct _fpstate_ia32 __user *fx = buf;
 	int err = 0;
 
-	/*
-	 * For legacy compatible, we always set FP/SSE bits in the bit
-	 * vector while saving the state to the user context.
-	 * This will enable us capturing any changes(during sigreturn) to
-	 * the FP/SSE bits by the legacy applications which don't touch
-	 * xstate_bv in the xsave header.
-	 *
-	 * xsave aware applications can change the xstate_bv in the xsave
-	 * header as well as change any contents in the memory layout.
-	 * xrestore as part of sigreturn will capture all the changes.
-	 */
-	tsk->thread.xstate->xsave.xsave_hdr.xstate_bv |= XSTATE_FPSSE;
-
 	if (save_i387_fxsave(fx) < 0)
 		return -1;
 

trunk/arch/x86/kernel/ptrace.c

@@ -40,7 +40,9 @@ enum x86_regset {
 	REGSET_GENERAL,
 	REGSET_FP,
 	REGSET_XFP,
+	REGSET_IOPERM64 = REGSET_XFP,
 	REGSET_TLS,
+	REGSET_IOPERM32,
 };
 
 /*
@@ -555,6 +557,29 @@ static int ptrace_set_debugreg(struct task_struct *child,
 	return 0;
 }
 
+/*
+ * These access the current or another (stopped) task's io permission
+ * bitmap for debugging or core dump.
+ */
+static int ioperm_active(struct task_struct *target,
+			 const struct user_regset *regset)
+{
+	return target->thread.io_bitmap_max / regset->size;
+}
+
+static int ioperm_get(struct task_struct *target,
+		      const struct user_regset *regset,
+		      unsigned int pos, unsigned int count,
+		      void *kbuf, void __user *ubuf)
+{
+	if (!target->thread.io_bitmap_ptr)
+		return -ENXIO;
+
+	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+				   target->thread.io_bitmap_ptr,
+				   0, IO_BITMAP_BYTES);
+}
+
 #ifdef CONFIG_X86_PTRACE_BTS
 /*
  * The configuration for a particular BTS hardware implementation.
@@ -1385,6 +1410,12 @@ static const struct user_regset x86_64_regsets[] = {
 		.size = sizeof(long), .align = sizeof(long),
 		.active = xfpregs_active, .get = xfpregs_get, .set = xfpregs_set
 	},
+	[REGSET_IOPERM64] = {
+		.core_note_type = NT_386_IOPERM,
+		.n = IO_BITMAP_LONGS,
+		.size = sizeof(long), .align = sizeof(long),
+		.active = ioperm_active, .get = ioperm_get
+	},
 };
 
 static const struct user_regset_view user_x86_64_view = {
@@ -1431,6 +1462,12 @@ static const struct user_regset x86_32_regsets[] = {
 		.active = regset_tls_active,
 		.get = regset_tls_get, .set = regset_tls_set
 	},
+	[REGSET_IOPERM32] = {
+		.core_note_type = NT_386_IOPERM,
+		.n = IO_BITMAP_BYTES / sizeof(u32),
+		.size = sizeof(u32), .align = sizeof(u32),
+		.active = ioperm_active, .get = ioperm_get
+	},
 };
 
 static const struct user_regset_view user_x86_32_view = {

trunk/arch/x86/kernel/xsave.c

@@ -95,9 +95,7 @@ int save_i387_xstate(void __user *buf)
 	 	 * Start with clearing the user buffer. This will present a
 	 	 * clean context for the bytes not touched by the fxsave/xsave.
 		 */
-		err = __clear_user(buf, sig_xstate_size);
-		if (err)
-			return err;
+		__clear_user(buf, sig_xstate_size);
 
 		if (task_thread_info(tsk)->status & TS_XSAVE)
 			err = xsave_user(buf);
@@ -116,40 +114,13 @@ int save_i387_xstate(void __user *buf)
 
 	if (task_thread_info(tsk)->status & TS_XSAVE) {
 		struct _fpstate __user *fx = buf;
-		struct _xstate __user *x = buf;
-		u64 xstate_bv;
 
 		err = __copy_to_user(&fx->sw_reserved, &fx_sw_reserved,
 				     sizeof(struct _fpx_sw_bytes));
 
 		err |= __put_user(FP_XSTATE_MAGIC2,
 				  (__u32 __user *) (buf + sig_xstate_size
 						    - FP_XSTATE_MAGIC2_SIZE));
-
-		/*
-		 * Read the xstate_bv which we copied (directly from the cpu or
-		 * from the state in task struct) to the user buffers and
-		 * set the FP/SSE bits.
-		 */
-		err |= __get_user(xstate_bv, &x->xstate_hdr.xstate_bv);
-
-		/*
-		 * For legacy compatible, we always set FP/SSE bits in the bit
-		 * vector while saving the state to the user context. This will
-		 * enable us capturing any changes(during sigreturn) to
-		 * the FP/SSE bits by the legacy applications which don't touch
-		 * xstate_bv in the xsave header.
-		 *
-		 * xsave aware apps can change the xstate_bv in the xsave
-		 * header as well as change any contents in the memory layout.
-		 * xrestore as part of sigreturn will capture all the changes.
-		 */
-		xstate_bv |= XSTATE_FPSSE;
-
-		err |= __put_user(xstate_bv, &x->xstate_hdr.xstate_bv);
-
-		if (err)
-			return err;
 	}
 
 	return 1;
@@ -301,7 +272,7 @@ void __cpuinit xsave_init(void)
 /*
  * setup the xstate image representing the init state
  */
-static void __init setup_xstate_init(void)
+void setup_xstate_init(void)
 {
 	init_xstate_buf = alloc_bootmem(xstate_size);
 	init_xstate_buf->i387.mxcsr = MXCSR_DEFAULT;

trunk/include/linux/elf.h

@@ -360,6 +360,7 @@ typedef struct elf64_shdr {
 #define NT_PPC_SPE	0x101		/* PowerPC SPE/EVR registers */
 #define NT_PPC_VSX	0x102		/* PowerPC VSX registers */
 #define NT_386_TLS	0x200		/* i386 TLS slots (struct user_desc) */
+#define NT_386_IOPERM	0x201		/* x86 io permission bitmap (1=deny) */
 
 
 /* Note header in a PT_NOTE section */