thr3ads.net - Nouveau - [Nouveau] [PATCH] x86, mmiotrace: add support for tracing STOS instruction [Jul 2010]

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Marcin Slusarz

2010-Jul-31 20:51 UTC

[Nouveau] [PATCH] x86, mmiotrace: add support for tracing STOS instruction

Signed-off-by: Marcin Slusarz <marcin.slusarz at gmail.com>
Cc: Pekka Paalanen <pq at iki.fi>
---
 arch/x86/mm/pf_in.c |   30 +++++++++++++++++-------------
 1 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/arch/x86/mm/pf_in.c b/arch/x86/mm/pf_in.c
index 308e325..38e6d17 100644
--- a/arch/x86/mm/pf_in.c
+++ b/arch/x86/mm/pf_in.c
@@ -40,16 +40,16 @@ static unsigned char prefix_codes[] = {
 static unsigned int reg_rop[] = {
 	0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
 };
-static unsigned int reg_wop[] = { 0x88, 0x89 };
+static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
 static unsigned int imm_wop[] = { 0xC6, 0xC7 };
 /* IA32 Manual 3, 3-432*/
-static unsigned int rw8[] = { 0x88, 0x8A, 0xC6 };
+static unsigned int rw8[] = { 0x88, 0x8A, 0xC6, 0xAA };
 static unsigned int rw32[] = {
-	0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
+	0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
 };
-static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F };
+static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F, 0xAA };
 static unsigned int mw16[] = { 0xB70F, 0xBF0F };
-static unsigned int mw32[] = { 0x89, 0x8B, 0xC7 };
+static unsigned int mw32[] = { 0x89, 0x8B, 0xC7, 0xAB };
 static unsigned int mw64[] = {};
 #else /* not __i386__ */
 static unsigned char prefix_codes[] = {
@@ -63,20 +63,20 @@ static unsigned char prefix_codes[] = {
 static unsigned int reg_rop[] = {
 	0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
 };
-static unsigned int reg_wop[] = { 0x88, 0x89 };
+static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
 static unsigned int imm_wop[] = { 0xC6, 0xC7 };
-static unsigned int rw8[] = { 0xC6, 0x88, 0x8A };
+static unsigned int rw8[] = { 0xC6, 0x88, 0x8A, 0xAA };
 static unsigned int rw32[] = {
-	0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
+	0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
 };
 /* 8 bit only */
-static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F };
+static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F, 0xAA };
 /* 16 bit only */
 static unsigned int mw16[] = { 0xB70F, 0xBF0F };
 /* 16 or 32 bit */
 static unsigned int mw32[] = { 0xC7 };
 /* 16, 32 or 64 bit */
-static unsigned int mw64[] = { 0x89, 0x8B };
+static unsigned int mw64[] = { 0x89, 0x8B, 0xAB };
 #endif /* not __i386__ */
 
 struct prefix_bits {
@@ -410,7 +410,6 @@ static unsigned long *get_reg_w32(int no, struct pt_regs
*regs)
 unsigned long get_ins_reg_val(unsigned long ins_addr, struct pt_regs *regs)
 {
 	unsigned int opcode;
-	unsigned char mod_rm;
 	int reg;
 	unsigned char *p;
 	struct prefix_bits prf;
@@ -437,8 +436,13 @@ unsigned long get_ins_reg_val(unsigned long ins_addr,
struct pt_regs *regs)
 	goto err;
 
 do_work:
-	mod_rm = *p;
-	reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
+	/* for STOS, source register is fixed */
+	if (opcode == 0xAA || opcode == 0xAB) {
+		reg = arg_AX;
+	} else {
+		unsigned char mod_rm = *p;
+		reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
+	}
 	switch (get_ins_reg_width(ins_addr)) {
 	case 1:
 		return *get_reg_w8(reg, prf.rex, regs);
-- 
1.7.1.1

Pekka Paalanen

2010-Aug-01 08:23 UTC

head link

[Nouveau] [PATCH] x86, mmiotrace: add support for tracing STOS instruction

On Sat, 31 Jul 2010 22:51:01 +0200
Marcin Slusarz <marcin.slusarz at gmail.com> wrote:
> Signed-off-by: Marcin Slusarz <marcin.slusarz at gmail.com>
> Cc: Pekka Paalanen <pq at iki.fi>
I have not checked the correctness of this patch, but otherwise:
Acked-by: Pekka Paalanen <pq at iki.fi>
> ---
>  arch/x86/mm/pf_in.c |   30 +++++++++++++++++-------------
>  1 files changed, 17 insertions(+), 13 deletions(-)
> 
> diff --git a/arch/x86/mm/pf_in.c b/arch/x86/mm/pf_in.c
> index 308e325..38e6d17 100644
> --- a/arch/x86/mm/pf_in.c
> +++ b/arch/x86/mm/pf_in.c
> @@ -40,16 +40,16 @@ static unsigned char prefix_codes[] = {
>  static unsigned int reg_rop[] = {
>  	0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
>  };
> -static unsigned int reg_wop[] = { 0x88, 0x89 };
> +static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
>  static unsigned int imm_wop[] = { 0xC6, 0xC7 };
>  /* IA32 Manual 3, 3-432*/
> -static unsigned int rw8[] = { 0x88, 0x8A, 0xC6 };
> +static unsigned int rw8[] = { 0x88, 0x8A, 0xC6, 0xAA };
>  static unsigned int rw32[] = {
> -	0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
> +	0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
>  };
> -static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F };
> +static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F,
> 0xAA }; static unsigned int mw16[] = { 0xB70F, 0xBF0F };
> -static unsigned int mw32[] = { 0x89, 0x8B, 0xC7 };
> +static unsigned int mw32[] = { 0x89, 0x8B, 0xC7, 0xAB };
>  static unsigned int mw64[] = {};
>  #else /* not __i386__ */
>  static unsigned char prefix_codes[] = {
> @@ -63,20 +63,20 @@ static unsigned char prefix_codes[] = {
>  static unsigned int reg_rop[] = {
>  	0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
>  };
> -static unsigned int reg_wop[] = { 0x88, 0x89 };
> +static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
>  static unsigned int imm_wop[] = { 0xC6, 0xC7 };
> -static unsigned int rw8[] = { 0xC6, 0x88, 0x8A };
> +static unsigned int rw8[] = { 0xC6, 0x88, 0x8A, 0xAA };
>  static unsigned int rw32[] = {
> -	0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
> +	0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
>  };
>  /* 8 bit only */
> -static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F };
> +static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F,
> 0xAA }; /* 16 bit only */
>  static unsigned int mw16[] = { 0xB70F, 0xBF0F };
>  /* 16 or 32 bit */
>  static unsigned int mw32[] = { 0xC7 };
>  /* 16, 32 or 64 bit */
> -static unsigned int mw64[] = { 0x89, 0x8B };
> +static unsigned int mw64[] = { 0x89, 0x8B, 0xAB };
>  #endif /* not __i386__ */
>  
>  struct prefix_bits {
> @@ -410,7 +410,6 @@ static unsigned long *get_reg_w32(int no,
> struct pt_regs *regs) unsigned long get_ins_reg_val(unsigned long
> ins_addr, struct pt_regs *regs) {
>  	unsigned int opcode;
> -	unsigned char mod_rm;
>  	int reg;
>  	unsigned char *p;
>  	struct prefix_bits prf;
> @@ -437,8 +436,13 @@ unsigned long get_ins_reg_val(unsigned long
> ins_addr, struct pt_regs *regs) goto err;
>  
>  do_work:
> -	mod_rm = *p;
> -	reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
> +	/* for STOS, source register is fixed */
> +	if (opcode == 0xAA || opcode == 0xAB) {
> +		reg = arg_AX;
> +	} else {
> +		unsigned char mod_rm = *p;
> +		reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
> +	}
>  	switch (get_ins_reg_width(ins_addr)) {
>  	case 1:
>  		return *get_reg_w8(reg, prf.rex, regs);
> -- 
> 1.7.1.1
-- 
Pekka Paalanen
http://www.iki.fi/pq/

Frederic Weisbecker

2010-Aug-01 23:08 UTC

head link

[Nouveau] [PATCH] x86, mmiotrace: add support for tracing STOS instruction

On Sun, Aug 01, 2010 at 11:23:03AM +0300, Pekka Paalanen
wrote:> On Sat, 31 Jul 2010 22:51:01 +0200
> Marcin Slusarz <marcin.slusarz at gmail.com> wrote:
> 
> > Signed-off-by: Marcin Slusarz <marcin.slusarz at gmail.com>
> > Cc: Pekka Paalanen <pq at iki.fi>
> 
> I have not checked the correctness of this patch, but otherwise:
> Acked-by: Pekka Paalanen <pq at iki.fi>


Queued, thanks!

tip-bot for Marcin Slusarz

2010-Aug-02 07:58 UTC

head link

[Nouveau] [tip:perf/core] x86, mmiotrace: Add support for tracing STOS instruction

Commit-ID:  cc05152ab72d7a65e6ea97d286af4f878c8f7371
Gitweb:     http://git.kernel.org/tip/cc05152ab72d7a65e6ea97d286af4f878c8f7371
Author:     Marcin Slusarz <marcin.slusarz at gmail.com>
AuthorDate: Sat, 31 Jul 2010 22:51:01 +0200
Committer:  Frederic Weisbecker <fweisbec at gmail.com>
CommitDate: Mon, 2 Aug 2010 01:32:01 +0200

x86,mmiotrace: Add support for tracing STOS instruction

Add support for stos access tracing with mmiotrace.

Signed-off-by: Marcin Slusarz <marcin.slusarz at gmail.com>
Acked-by: Pekka Paalanen <pq at iki.fi>
Cc: Nouveau <nouveau at lists.freedesktop.org>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: H. Peter Anvin <hpa at zytor.com>
Cc: Ingo Molnar <mingo at elte.hu>
Cc: Steven Rostedt <rostedt at goodmis.org>
LKML-Reference: <20100731205101.GA5860 at joi.lan>
Signed-off-by: Frederic Weisbecker <fweisbec at gmail.com>
---
 arch/x86/mm/pf_in.c |   30 +++++++++++++++++-------------
 1 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/arch/x86/mm/pf_in.c b/arch/x86/mm/pf_in.c
index 308e325..38e6d17 100644
--- a/arch/x86/mm/pf_in.c
+++ b/arch/x86/mm/pf_in.c
@@ -40,16 +40,16 @@ static unsigned char prefix_codes[] = {
 static unsigned int reg_rop[] = {
 	0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
 };
-static unsigned int reg_wop[] = { 0x88, 0x89 };
+static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
 static unsigned int imm_wop[] = { 0xC6, 0xC7 };
 /* IA32 Manual 3, 3-432*/
-static unsigned int rw8[] = { 0x88, 0x8A, 0xC6 };
+static unsigned int rw8[] = { 0x88, 0x8A, 0xC6, 0xAA };
 static unsigned int rw32[] = {
-	0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
+	0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
 };
-static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F };
+static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F, 0xAA };
 static unsigned int mw16[] = { 0xB70F, 0xBF0F };
-static unsigned int mw32[] = { 0x89, 0x8B, 0xC7 };
+static unsigned int mw32[] = { 0x89, 0x8B, 0xC7, 0xAB };
 static unsigned int mw64[] = {};
 #else /* not __i386__ */
 static unsigned char prefix_codes[] = {
@@ -63,20 +63,20 @@ static unsigned char prefix_codes[] = {
 static unsigned int reg_rop[] = {
 	0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
 };
-static unsigned int reg_wop[] = { 0x88, 0x89 };
+static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
 static unsigned int imm_wop[] = { 0xC6, 0xC7 };
-static unsigned int rw8[] = { 0xC6, 0x88, 0x8A };
+static unsigned int rw8[] = { 0xC6, 0x88, 0x8A, 0xAA };
 static unsigned int rw32[] = {
-	0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
+	0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
 };
 /* 8 bit only */
-static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F };
+static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F, 0xAA };
 /* 16 bit only */
 static unsigned int mw16[] = { 0xB70F, 0xBF0F };
 /* 16 or 32 bit */
 static unsigned int mw32[] = { 0xC7 };
 /* 16, 32 or 64 bit */
-static unsigned int mw64[] = { 0x89, 0x8B };
+static unsigned int mw64[] = { 0x89, 0x8B, 0xAB };
 #endif /* not __i386__ */
 
 struct prefix_bits {
@@ -410,7 +410,6 @@ static unsigned long *get_reg_w32(int no, struct pt_regs
*regs)
 unsigned long get_ins_reg_val(unsigned long ins_addr, struct pt_regs *regs)
 {
 	unsigned int opcode;
-	unsigned char mod_rm;
 	int reg;
 	unsigned char *p;
 	struct prefix_bits prf;
@@ -437,8 +436,13 @@ unsigned long get_ins_reg_val(unsigned long ins_addr,
struct pt_regs *regs)
 	goto err;
 
 do_work:
-	mod_rm = *p;
-	reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
+	/* for STOS, source register is fixed */
+	if (opcode == 0xAA || opcode == 0xAB) {
+		reg = arg_AX;
+	} else {
+		unsigned char mod_rm = *p;
+		reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
+	}
 	switch (get_ins_reg_width(ins_addr)) {
 	case 1:
 		return *get_reg_w8(reg, prf.rex, regs);

Nouveau - Jul 2010 - [PATCH] x86, mmiotrace: add support for tracing STOS instruction

[Nouveau] [PATCH] x86, mmiotrace: add support for tracing STOS instruction

[Nouveau] [PATCH] x86, mmiotrace: add support for tracing STOS instruction

[Nouveau] [PATCH] x86, mmiotrace: add support for tracing STOS instruction

[Nouveau] [tip:perf/core] x86, mmiotrace: Add support for tracing STOS instruction