[patch 0/2] add Altivec/VMX state to coredumps

[patch 0/2] add Altivec/VMX state to coredumps

[markn]

-- 
Here's the new and improved patch to add Altivec/VMX state into the coredump.

It's now two patches:
* the first patch makes the note type of the state dumped by
  elf_core_copy_task_xfpregs() a #define and adds the appropriate #defines so
  that archs that support SSE still have their note type as NT_PRXFPREG
* the second patch actually adds the Altivec/VMX state to the coredumps and
  uses a note type of NT_PPC_VMX that's #defined as 0x100. Thus SPE could use
  a note type of NT_PPC_SPE and 0x101, for example.

The second patch is essentially the same as the single patch that was posted on
2007-09-25, but with the addition of the new NT_PPC_VMX note type.

[patch 1/2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[markn]

Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE in the coredump code which
allows for more flexibility in the note type for the state of 'extended
floating point' implementations in coredumps. New note types can now be
added with an appropriate #define.

#define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all current users so
there's are no change in behaviour.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
---
 arch/ia64/ia32/elfcore32.h     |    1 +
 arch/x86_64/ia32/ia32_binfmt.c |    1 +
 fs/binfmt_elf.c                |    4 ++--
 include/asm-i386/elf.h         |    1 +
 4 files changed, 5 insertions(+), 2 deletions(-)

Index: linux/arch/ia64/ia32/elfcore32.h
===================================================================
--- linux.orig/arch/ia64/ia32/elfcore32.h
+++ linux/arch/ia64/ia32/elfcore32.h
@@ -117,6 +117,7 @@ elf_core_copy_task_fpregs(struct task_st
 }
 
 #define ELF_CORE_COPY_XFPREGS 1
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 static inline int
 elf_core_copy_task_xfpregs(struct task_struct *tsk, elf_fpxregset_t *xfpu)
 {
Index: linux/arch/x86_64/ia32/ia32_binfmt.c
===================================================================
--- linux.orig/arch/x86_64/ia32/ia32_binfmt.c
+++ linux/arch/x86_64/ia32/ia32_binfmt.c
@@ -188,6 +188,7 @@ elf_core_copy_task_fpregs(struct task_st
 }
 
 #define ELF_CORE_COPY_XFPREGS 1
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 static inline int 
 elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
 {
Index: linux/fs/binfmt_elf.c
===================================================================
--- linux.orig/fs/binfmt_elf.c
+++ linux/fs/binfmt_elf.c
@@ -1446,8 +1446,8 @@ static int elf_dump_thread_status(long s
 
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
-		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
-			  &t->xfpu);
+		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
+			  sizeof(t->xfpu), &t->xfpu);
 		t->num_notes++;
 		sz += notesize(&t->notes[2]);
 	}
Index: linux/include/asm-i386/elf.h
===================================================================
--- linux.orig/include/asm-i386/elf.h
+++ linux/include/asm-i386/elf.h
@@ -129,6 +129,7 @@ extern int dump_task_extended_fpu (struc
 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
 #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 
 #define VDSO_HIGH_BASE		(__fix_to_virt(FIX_VDSO))
 #define VDSO_CURRENT_BASE	((unsigned long)current->mm->context.vdso)

-- 

[patch 2/2] add Altivec/VMX state to coredumps

[markn]

Update dump_task_altivec() (that has so far never been put to use)
so that it dumps the Altivec/VMX registers (VR[0] - VR[31], VSCR
and VRSAVE) in the same format as the ptrace get_vrregs() and add
the appropriate glue typedef and #defines to make it work.

A new note type of NT_PPC_VMX was chosen to be 0x100 (arbitrarily)
because it allows the low range values to be used for more generic
purposes and 0x100 seems an adequate starting point for PowerPC
extensions.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
---
 arch/powerpc/kernel/process.c |   28 +++++++++++++++++++++++++---
 include/asm-powerpc/elf.h     |    8 ++++++++
 include/linux/elf.h           |    1 +
 3 files changed, 34 insertions(+), 3 deletions(-)

Index: linux/arch/powerpc/kernel/process.c
===================================================================
--- linux.orig/arch/powerpc/kernel/process.c
+++ linux/arch/powerpc/kernel/process.c
@@ -149,10 +149,32 @@ void flush_altivec_to_thread(struct task
 	}
 }
 
-int dump_task_altivec(struct pt_regs *regs, elf_vrregset_t *vrregs)
+int dump_task_altivec(struct task_struct *tsk, elf_vrregset_t *vrregs)
 {
-	flush_altivec_to_thread(current);
-	memcpy(vrregs, &current->thread.vr[0], sizeof(*vrregs));
+	/* ELF_NVRREG includes the VSCR and VRSAVE which we need to save
+	 * separately, see below */
+	const int nregs = ELF_NVRREG - 2;
+	elf_vrreg_t *reg;
+	u32 *dest;
+
+	if (tsk == current)
+		flush_altivec_to_thread(tsk);
+
+	reg = (elf_vrreg_t *)vrregs;
+
+	/* copy the 32 vr registers */
+	memcpy(reg, &tsk->thread.vr[0], nregs * sizeof(*reg));
+	reg += nregs;
+
+	/* copy the vscr */
+	memcpy(reg, &tsk->thread.vscr, sizeof(*reg));
+	reg++;
+
+	/* vrsave is stored in the high 32bit slot of the final 128bits */
+	memset(reg, 0, sizeof(*reg));
+	dest = (u32 *)reg;
+	*dest = tsk->thread.vrsave;
+
 	return 1;
 }
 #endif /* CONFIG_ALTIVEC */
Index: linux/include/asm-powerpc/elf.h
===================================================================
--- linux.orig/include/asm-powerpc/elf.h
+++ linux/include/asm-powerpc/elf.h
@@ -212,6 +212,14 @@ static inline int dump_task_regs(struct 
 extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *); 
 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
 
+typedef elf_vrregset_t elf_fpxregset_t;
+
+#ifdef CONFIG_ALTIVEC
+extern int dump_task_altivec(struct task_struct *, elf_vrregset_t *vrregs);
+#define ELF_CORE_COPY_XFPREGS(tsk, regs) dump_task_altivec(tsk, regs)
+#define ELF_CORE_XFPREG_TYPE NT_PPC_VMX
+#endif
+
 #endif /* __KERNEL__ */
 
 /* ELF_HWCAP yields a mask that user programs can use to figure out what
Index: linux/include/linux/elf.h
===================================================================
--- linux.orig/include/linux/elf.h
+++ linux/include/linux/elf.h
@@ -355,6 +355,7 @@ typedef struct elf64_shdr {
 #define NT_TASKSTRUCT	4
 #define NT_AUXV		6
 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
+#define NT_PPC_VMX	0x100		/* PowerPC Altivec/VMX registers */
 
 
 /* Note header in a PT_NOTE section */

-- 

Re: [patch 1/2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Kumar Gala]

On Oct 11, 2007, at 2:15 AM, markn@au1.ibm.com wrote:

> Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE in the coredump code  
> which
> allows for more flexibility in the note type for the state of  
> 'extended
> floating point' implementations in coredumps. New note types can  
> now be
> added with an appropriate #define.
>
> #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all current users so
> there's are no change in behaviour.

Can we make this ELF_CORE_VECREG_TYPE or something that is so coupled  
to the x86 specific name?

>
> Signed-off-by: Mark Nelson <markn@au1.ibm.com>
> ---
>  arch/ia64/ia32/elfcore32.h     |    1 +
>  arch/x86_64/ia32/ia32_binfmt.c |    1 +
>  fs/binfmt_elf.c                |    4 ++--
>  include/asm-i386/elf.h         |    1 +
>  4 files changed, 5 insertions(+), 2 deletions(-)
>
> Index: linux/arch/ia64/ia32/elfcore32.h
> ===================================================================
> --- linux.orig/arch/ia64/ia32/elfcore32.h
> +++ linux/arch/ia64/ia32/elfcore32.h
> @@ -117,6 +117,7 @@ elf_core_copy_task_fpregs(struct task_st
>  }
>
>  #define ELF_CORE_COPY_XFPREGS 1
> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>  static inline int
>  elf_core_copy_task_xfpregs(struct task_struct *tsk,  
> elf_fpxregset_t *xfpu)
>  {
> Index: linux/arch/x86_64/ia32/ia32_binfmt.c
> ===================================================================
> --- linux.orig/arch/x86_64/ia32/ia32_binfmt.c
> +++ linux/arch/x86_64/ia32/ia32_binfmt.c
> @@ -188,6 +188,7 @@ elf_core_copy_task_fpregs(struct task_st
>  }
>
>  #define ELF_CORE_COPY_XFPREGS 1
> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>  static inline int
>  elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t  
> *xfpu)
>  {
> Index: linux/fs/binfmt_elf.c
> ===================================================================
> --- linux.orig/fs/binfmt_elf.c
> +++ linux/fs/binfmt_elf.c
> @@ -1446,8 +1446,8 @@ static int elf_dump_thread_status(long s
>
>  #ifdef ELF_CORE_COPY_XFPREGS
>  	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
> -		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
> -			  &t->xfpu);
> +		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
> +			  sizeof(t->xfpu), &t->xfpu);
>  		t->num_notes++;
>  		sz += notesize(&t->notes[2]);
>  	}

You've only fixed up one of 4 NT_PRXFPREG uses in the kernel.

Also, I'm not a fan of your proposed mechanism to "overload" the  
elf_fpxregset_t.  I'd rather see us introduce a new elf_vecregset_t  
and have it typedef'd to be elf_fpxregset_t on i386, x86_64, ia64

> Index: linux/include/asm-i386/elf.h
> ===================================================================
> --- linux.orig/include/asm-i386/elf.h
> +++ linux/include/asm-i386/elf.h
> @@ -129,6 +129,7 @@ extern int dump_task_extended_fpu (struc
>  #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk,  
> elf_regs)
>  #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk,  
> elf_fpregs)
>  #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs)  
> dump_task_extended_fpu(tsk, elf_xfpregs)
> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>
>  #define VDSO_HIGH_BASE		(__fix_to_virt(FIX_VDSO))
>  #define VDSO_CURRENT_BASE	((unsigned long)current->mm->context.vdso)
>
> -- 
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev

Re: [patch 1/2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Paul Mackerras]

Kumar Gala writes:

> > #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all current users so
> > there's are no change in behaviour.
> 
> Can we make this ELF_CORE_VECREG_TYPE or something that is so coupled  
> to the x86 specific name?

How is "extended floating point registers" x86-specific?

ELF_CORE_XFPREG_TYPE is a suitable name for something that's used in
conjunction with a function called elf_core_copy_task_xfpregs().

Paul.

Re: [patch 1/2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Kumar Gala]

On Oct 11, 2007, at 4:55 PM, Paul Mackerras wrote:

> Kumar Gala writes:
>
>>> #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all current  
>>> users so
>>> there's are no change in behaviour.
>>
>> Can we make this ELF_CORE_VECREG_TYPE or something that is so coupled
>> to the x86 specific name?
>
> How is "extended floating point registers" x86-specific?

we'll I don't consider the altivec register file as 'extended fp'.   
I'm assuming the name XFP came from IA32 land when MMX/SSE came into  
existence.

> ELF_CORE_XFPREG_TYPE is a suitable name for something that's used in
> conjunction with a function called elf_core_copy_task_xfpregs().

agreed, I think the function name should change as well.

- k

Re: [patch 1/2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Paul Mackerras]

Kumar Gala writes:

> > ELF_CORE_XFPREG_TYPE is a suitable name for something that's used in
> > conjunction with a function called elf_core_copy_task_xfpregs().
> 
> agreed, I think the function name should change as well.

Maybe.  Let's do one step at a time...

Paul.

Re: [patch 1/2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Michael Ellerman]

[-- Attachment #1: Type: text/plain, Size: 3498 bytes --]

On Thu, 2007-10-11 at 08:04 -0500, Kumar Gala wrote:
> On Oct 11, 2007, at 2:15 AM, markn@au1.ibm.com wrote:
> 
> > Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE in the coredump code  
> > which
> > allows for more flexibility in the note type for the state of  
> > 'extended
> > floating point' implementations in coredumps. New note types can  
> > now be
> > added with an appropriate #define.
> >
> > #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all current users so
> > there's are no change in behaviour.
> 
> Can we make this ELF_CORE_VECREG_TYPE or something that is so coupled  
> to the x86 specific name?
> 
> >
> > Signed-off-by: Mark Nelson <markn@au1.ibm.com>
> > ---
> >  arch/ia64/ia32/elfcore32.h     |    1 +
> >  arch/x86_64/ia32/ia32_binfmt.c |    1 +
> >  fs/binfmt_elf.c                |    4 ++--
> >  include/asm-i386/elf.h         |    1 +
> >  4 files changed, 5 insertions(+), 2 deletions(-)
> >
> > Index: linux/arch/ia64/ia32/elfcore32.h
> > ===================================================================
> > --- linux.orig/arch/ia64/ia32/elfcore32.h
> > +++ linux/arch/ia64/ia32/elfcore32.h
> > @@ -117,6 +117,7 @@ elf_core_copy_task_fpregs(struct task_st
> >  }
> >
> >  #define ELF_CORE_COPY_XFPREGS 1
> > +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
> >  static inline int
> >  elf_core_copy_task_xfpregs(struct task_struct *tsk,  
> > elf_fpxregset_t *xfpu)
> >  {
> > Index: linux/arch/x86_64/ia32/ia32_binfmt.c
> > ===================================================================
> > --- linux.orig/arch/x86_64/ia32/ia32_binfmt.c
> > +++ linux/arch/x86_64/ia32/ia32_binfmt.c
> > @@ -188,6 +188,7 @@ elf_core_copy_task_fpregs(struct task_st
> >  }
> >
> >  #define ELF_CORE_COPY_XFPREGS 1
> > +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
> >  static inline int
> >  elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t  
> > *xfpu)
> >  {
> > Index: linux/fs/binfmt_elf.c
> > ===================================================================
> > --- linux.orig/fs/binfmt_elf.c
> > +++ linux/fs/binfmt_elf.c
> > @@ -1446,8 +1446,8 @@ static int elf_dump_thread_status(long s
> >
> >  #ifdef ELF_CORE_COPY_XFPREGS
> >  	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
> > -		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
> > -			  &t->xfpu);
> > +		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
> > +			  sizeof(t->xfpu), &t->xfpu);
> >  		t->num_notes++;
> >  		sz += notesize(&t->notes[2]);
> >  	}
> 
> You've only fixed up one of 4 NT_PRXFPREG uses in the kernel.
> 
> Also, I'm not a fan of your proposed mechanism to "overload" the  
> elf_fpxregset_t.  I'd rather see us introduce a new elf_vecregset_t  
> and have it typedef'd to be elf_fpxregset_t on i386, x86_64, ia64

He's not overloading it, there is no such thing as an elf_fpxregset_t,
unless it's typedef'd to something else by the arch code, eg:

include/asm-i386/elf.h:typedef struct user_fxsr_struct elf_fpxregset_t;
include/asm-ia64/elf.h:typedef unsigned long elf_fpxregset_t;

Introducing another typedef would just be another layer of obfuscation
IMO, and the elf code doesn't need any more of that.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

Re: [patch 1/2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Mark Nelson]

Kumar Gala wrote:
> 
> On Oct 11, 2007, at 2:15 AM, markn@au1.ibm.com wrote:
> 
>> Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE in the coredump code which
>> allows for more flexibility in the note type for the state of 'extended
>> floating point' implementations in coredumps. New note types can now be
>> added with an appropriate #define.
>>
>> #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all current users so
>> there's are no change in behaviour.
> 
> Can we make this ELF_CORE_VECREG_TYPE or something that is so coupled to
> the x86 specific name?
> 
>>
>> Signed-off-by: Mark Nelson <markn@au1.ibm.com>
>> ---
>>  arch/ia64/ia32/elfcore32.h     |    1 +
>>  arch/x86_64/ia32/ia32_binfmt.c |    1 +
>>  fs/binfmt_elf.c                |    4 ++--
>>  include/asm-i386/elf.h         |    1 +
>>  4 files changed, 5 insertions(+), 2 deletions(-)
>>
>> Index: linux/arch/ia64/ia32/elfcore32.h
>> ===================================================================
>> --- linux.orig/arch/ia64/ia32/elfcore32.h
>> +++ linux/arch/ia64/ia32/elfcore32.h
>> @@ -117,6 +117,7 @@ elf_core_copy_task_fpregs(struct task_st
>>  }
>>
>>  #define ELF_CORE_COPY_XFPREGS 1
>> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>>  static inline int
>>  elf_core_copy_task_xfpregs(struct task_struct *tsk, elf_fpxregset_t
>> *xfpu)
>>  {
>> Index: linux/arch/x86_64/ia32/ia32_binfmt.c
>> ===================================================================
>> --- linux.orig/arch/x86_64/ia32/ia32_binfmt.c
>> +++ linux/arch/x86_64/ia32/ia32_binfmt.c
>> @@ -188,6 +188,7 @@ elf_core_copy_task_fpregs(struct task_st
>>  }
>>
>>  #define ELF_CORE_COPY_XFPREGS 1
>> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>>  static inline int
>>  elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
>>  {
>> Index: linux/fs/binfmt_elf.c
>> ===================================================================
>> --- linux.orig/fs/binfmt_elf.c
>> +++ linux/fs/binfmt_elf.c
>> @@ -1446,8 +1446,8 @@ static int elf_dump_thread_status(long s
>>
>>  #ifdef ELF_CORE_COPY_XFPREGS
>>      if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
>> -        fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
>> -              &t->xfpu);
>> +        fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
>> +              sizeof(t->xfpu), &t->xfpu);
>>          t->num_notes++;
>>          sz += notesize(&t->notes[2]);
>>      }
> 
> You've only fixed up one of 4 NT_PRXFPREG uses in the kernel.

Ooops... Right you are - very good pickup :) Fixed in a new version (will send promptly).


Thanks!

Mark.

> 
> Also, I'm not a fan of your proposed mechanism to "overload" the
> elf_fpxregset_t.  I'd rather see us introduce a new elf_vecregset_t and
> have it typedef'd to be elf_fpxregset_t on i386, x86_64, ia64
> 
>> Index: linux/include/asm-i386/elf.h
>> ===================================================================
>> --- linux.orig/include/asm-i386/elf.h
>> +++ linux/include/asm-i386/elf.h
>> @@ -129,6 +129,7 @@ extern int dump_task_extended_fpu (struc
>>  #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk,
>> elf_regs)
>>  #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk,
>> elf_fpregs)
>>  #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs)
>> dump_task_extended_fpu(tsk, elf_xfpregs)
>> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>>
>>  #define VDSO_HIGH_BASE        (__fix_to_virt(FIX_VDSO))
>>  #define VDSO_CURRENT_BASE    ((unsigned long)current->mm->context.vdso)
>>
>> -- 
>> _______________________________________________
>> Linuxppc-dev mailing list
>> Linuxppc-dev@ozlabs.org
>> https://ozlabs.org/mailman/listinfo/linuxppc-dev
> 

[PATCH 1/2] [V2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Mark Nelson]

Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE in the coredump code which
allows for more flexibility in the note type for the state of 'extended
floating point' implementations in coredumps.  New note types can now be
added with an appropriate #define.

This does #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all
current users so there's are no change in behaviour.

This will let us use different note types on powerpc for the
Altivec/VMX state that some PowerPC cpus have (G4, PPC970, POWER6) and
for the SPE (signal processing extension) state that some embedded
PowerPC cpus from Freescale have.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
---
 arch/ia64/ia32/elfcore32.h     |    1 +
 arch/x86_64/ia32/ia32_binfmt.c |    1 +
 fs/binfmt_elf.c                |    8 ++++----
 fs/binfmt_elf_fdpic.c          |    6 +++---
 include/asm-i386/elf.h         |    1 +
 5 files changed, 10 insertions(+), 7 deletions(-)

Index: linux/arch/ia64/ia32/elfcore32.h
===================================================================
--- linux.orig/arch/ia64/ia32/elfcore32.h
+++ linux/arch/ia64/ia32/elfcore32.h
@@ -117,6 +117,7 @@ elf_core_copy_task_fpregs(struct task_st
 }
 
 #define ELF_CORE_COPY_XFPREGS 1
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 static inline int
 elf_core_copy_task_xfpregs(struct task_struct *tsk, elf_fpxregset_t *xfpu)
 {
Index: linux/arch/x86_64/ia32/ia32_binfmt.c
===================================================================
--- linux.orig/arch/x86_64/ia32/ia32_binfmt.c
+++ linux/arch/x86_64/ia32/ia32_binfmt.c
@@ -188,6 +188,7 @@ elf_core_copy_task_fpregs(struct task_st
 }
 
 #define ELF_CORE_COPY_XFPREGS 1
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 static inline int 
 elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
 {
Index: linux/fs/binfmt_elf.c
===================================================================
--- linux.orig/fs/binfmt_elf.c
+++ linux/fs/binfmt_elf.c
@@ -1411,7 +1411,7 @@ struct elf_thread_status
 	elf_fpregset_t fpu;		/* NT_PRFPREG */
 	struct task_struct *thread;
 #ifdef ELF_CORE_COPY_XFPREGS
-	elf_fpxregset_t xfpu;		/* NT_PRXFPREG */
+	elf_fpxregset_t xfpu;		/* ELF_CORE_XFPREG_TYPE */
 #endif
 	struct memelfnote notes[3];
 	int num_notes;
@@ -1446,8 +1446,8 @@ static int elf_dump_thread_status(long s
 
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
-		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
-			  &t->xfpu);
+		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
+			  sizeof(t->xfpu), &t->xfpu);
 		t->num_notes++;
 		sz += notesize(&t->notes[2]);
 	}
@@ -1624,7 +1624,7 @@ static int elf_core_dump(long signr, str
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(current, xfpu))
 		fill_note(notes + numnote++,
-			  "LINUX", NT_PRXFPREG, sizeof(*xfpu), xfpu);
+			  "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
 #endif	
   
 	fs = get_fs();
Index: linux/fs/binfmt_elf_fdpic.c
===================================================================
--- linux.orig/fs/binfmt_elf_fdpic.c
+++ linux/fs/binfmt_elf_fdpic.c
@@ -1417,7 +1417,7 @@ struct elf_thread_status
 	elf_fpregset_t fpu;		/* NT_PRFPREG */
 	struct task_struct *thread;
 #ifdef ELF_CORE_COPY_XFPREGS
-	elf_fpxregset_t xfpu;		/* NT_PRXFPREG */
+	elf_fpxregset_t xfpu;		/* ELF_CORE_XFPREG_TYPE */
 #endif
 	struct memelfnote notes[3];
 	int num_notes;
@@ -1453,7 +1453,7 @@ static int elf_dump_thread_status(long s
 
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
-		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
+		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu),
 			  &t->xfpu);
 		t->num_notes++;
 		sz += notesize(&t->notes[2]);
@@ -1690,7 +1690,7 @@ static int elf_fdpic_core_dump(long sign
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(current, xfpu))
 		fill_note(notes + numnote++,
-			  "LINUX", NT_PRXFPREG, sizeof(*xfpu), xfpu);
+			  "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
 #endif
 
 	fs = get_fs();
Index: linux/include/asm-i386/elf.h
===================================================================
--- linux.orig/include/asm-i386/elf.h
+++ linux/include/asm-i386/elf.h
@@ -129,6 +129,7 @@ extern int dump_task_extended_fpu (struc
 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
 #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 
 #define VDSO_HIGH_BASE		(__fix_to_virt(FIX_VDSO))
 #define VDSO_CURRENT_BASE	((unsigned long)current->mm->context.vdso)

Re: [PATCH 1/2] [V2] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Mark Nelson]

Sorry for the patch noise but please disregard this patch - a line is longer than 80 characters and I'd hate to be brought up on that...

V3 will be the perfect version then :)


Thanks and apologies again!

Mark.

Mark Nelson wrote:
> Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE in the coredump code which
> allows for more flexibility in the note type for the state of 'extended
> floating point' implementations in coredumps.  New note types can now be
> added with an appropriate #define.
> 
> This does #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all
> current users so there's are no change in behaviour.
> 
> This will let us use different note types on powerpc for the
> Altivec/VMX state that some PowerPC cpus have (G4, PPC970, POWER6) and
> for the SPE (signal processing extension) state that some embedded
> PowerPC cpus from Freescale have.
> 
> Signed-off-by: Mark Nelson <markn@au1.ibm.com>
> ---
>  arch/ia64/ia32/elfcore32.h     |    1 +
>  arch/x86_64/ia32/ia32_binfmt.c |    1 +
>  fs/binfmt_elf.c                |    8 ++++----
>  fs/binfmt_elf_fdpic.c          |    6 +++---
>  include/asm-i386/elf.h         |    1 +
>  5 files changed, 10 insertions(+), 7 deletions(-)
> 
> Index: linux/arch/ia64/ia32/elfcore32.h
> ===================================================================
> --- linux.orig/arch/ia64/ia32/elfcore32.h
> +++ linux/arch/ia64/ia32/elfcore32.h
> @@ -117,6 +117,7 @@ elf_core_copy_task_fpregs(struct task_st
>  }
>  
>  #define ELF_CORE_COPY_XFPREGS 1
> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>  static inline int
>  elf_core_copy_task_xfpregs(struct task_struct *tsk, elf_fpxregset_t *xfpu)
>  {
> Index: linux/arch/x86_64/ia32/ia32_binfmt.c
> ===================================================================
> --- linux.orig/arch/x86_64/ia32/ia32_binfmt.c
> +++ linux/arch/x86_64/ia32/ia32_binfmt.c
> @@ -188,6 +188,7 @@ elf_core_copy_task_fpregs(struct task_st
>  }
>  
>  #define ELF_CORE_COPY_XFPREGS 1
> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>  static inline int 
>  elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
>  {
> Index: linux/fs/binfmt_elf.c
> ===================================================================
> --- linux.orig/fs/binfmt_elf.c
> +++ linux/fs/binfmt_elf.c
> @@ -1411,7 +1411,7 @@ struct elf_thread_status
>  	elf_fpregset_t fpu;		/* NT_PRFPREG */
>  	struct task_struct *thread;
>  #ifdef ELF_CORE_COPY_XFPREGS
> -	elf_fpxregset_t xfpu;		/* NT_PRXFPREG */
> +	elf_fpxregset_t xfpu;		/* ELF_CORE_XFPREG_TYPE */
>  #endif
>  	struct memelfnote notes[3];
>  	int num_notes;
> @@ -1446,8 +1446,8 @@ static int elf_dump_thread_status(long s
>  
>  #ifdef ELF_CORE_COPY_XFPREGS
>  	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
> -		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
> -			  &t->xfpu);
> +		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
> +			  sizeof(t->xfpu), &t->xfpu);
>  		t->num_notes++;
>  		sz += notesize(&t->notes[2]);
>  	}
> @@ -1624,7 +1624,7 @@ static int elf_core_dump(long signr, str
>  #ifdef ELF_CORE_COPY_XFPREGS
>  	if (elf_core_copy_task_xfpregs(current, xfpu))
>  		fill_note(notes + numnote++,
> -			  "LINUX", NT_PRXFPREG, sizeof(*xfpu), xfpu);
> +			  "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
>  #endif	
>    
>  	fs = get_fs();
> Index: linux/fs/binfmt_elf_fdpic.c
> ===================================================================
> --- linux.orig/fs/binfmt_elf_fdpic.c
> +++ linux/fs/binfmt_elf_fdpic.c
> @@ -1417,7 +1417,7 @@ struct elf_thread_status
>  	elf_fpregset_t fpu;		/* NT_PRFPREG */
>  	struct task_struct *thread;
>  #ifdef ELF_CORE_COPY_XFPREGS
> -	elf_fpxregset_t xfpu;		/* NT_PRXFPREG */
> +	elf_fpxregset_t xfpu;		/* ELF_CORE_XFPREG_TYPE */
>  #endif
>  	struct memelfnote notes[3];
>  	int num_notes;
> @@ -1453,7 +1453,7 @@ static int elf_dump_thread_status(long s
>  
>  #ifdef ELF_CORE_COPY_XFPREGS
>  	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
> -		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
> +		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu),

the line above is the offender...

>  			  &t->xfpu);
>  		t->num_notes++;
>  		sz += notesize(&t->notes[2]);
> @@ -1690,7 +1690,7 @@ static int elf_fdpic_core_dump(long sign
>  #ifdef ELF_CORE_COPY_XFPREGS
>  	if (elf_core_copy_task_xfpregs(current, xfpu))
>  		fill_note(notes + numnote++,
> -			  "LINUX", NT_PRXFPREG, sizeof(*xfpu), xfpu);
> +			  "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
>  #endif
>  
>  	fs = get_fs();
> Index: linux/include/asm-i386/elf.h
> ===================================================================
> --- linux.orig/include/asm-i386/elf.h
> +++ linux/include/asm-i386/elf.h
> @@ -129,6 +129,7 @@ extern int dump_task_extended_fpu (struc
>  #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
>  #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
>  #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
> +#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
>  
>  #define VDSO_HIGH_BASE		(__fix_to_virt(FIX_VDSO))
>  #define VDSO_CURRENT_BASE	((unsigned long)current->mm->context.vdso)
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
> 

[PATCH 1/2] [V3] Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE #define

[Mark Nelson]

Replace NT_PRXFPREG with ELF_CORE_XFPREG_TYPE in the coredump code which
allows for more flexibility in the note type for the state of 'extended
floating point' implementations in coredumps.  New note types can now be
added with an appropriate #define.

This does #define ELF_CORE_XFPREG_TYPE to be NT_PRXFPREG in all
current users so there's are no change in behaviour.

This will let us use different note types on powerpc for the
Altivec/VMX state that some PowerPC cpus have (G4, PPC970, POWER6) and
for the SPE (signal processing extension) state that some embedded
PowerPC cpus from Freescale have.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
---
 arch/ia64/ia32/elfcore32.h     |    1 +
 arch/x86_64/ia32/ia32_binfmt.c |    1 +
 fs/binfmt_elf.c                |    8 ++++----
 fs/binfmt_elf_fdpic.c          |    8 ++++----
 include/asm-i386/elf.h         |    1 +
 5 files changed, 11 insertions(+), 8 deletions(-)

Index: linux/arch/ia64/ia32/elfcore32.h
===================================================================
--- linux.orig/arch/ia64/ia32/elfcore32.h
+++ linux/arch/ia64/ia32/elfcore32.h
@@ -117,6 +117,7 @@ elf_core_copy_task_fpregs(struct task_st
 }
 
 #define ELF_CORE_COPY_XFPREGS 1
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 static inline int
 elf_core_copy_task_xfpregs(struct task_struct *tsk, elf_fpxregset_t *xfpu)
 {
Index: linux/arch/x86_64/ia32/ia32_binfmt.c
===================================================================
--- linux.orig/arch/x86_64/ia32/ia32_binfmt.c
+++ linux/arch/x86_64/ia32/ia32_binfmt.c
@@ -188,6 +188,7 @@ elf_core_copy_task_fpregs(struct task_st
 }
 
 #define ELF_CORE_COPY_XFPREGS 1
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 static inline int 
 elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
 {
Index: linux/fs/binfmt_elf.c
===================================================================
--- linux.orig/fs/binfmt_elf.c
+++ linux/fs/binfmt_elf.c
@@ -1411,7 +1411,7 @@ struct elf_thread_status
 	elf_fpregset_t fpu;		/* NT_PRFPREG */
 	struct task_struct *thread;
 #ifdef ELF_CORE_COPY_XFPREGS
-	elf_fpxregset_t xfpu;		/* NT_PRXFPREG */
+	elf_fpxregset_t xfpu;		/* ELF_CORE_XFPREG_TYPE */
 #endif
 	struct memelfnote notes[3];
 	int num_notes;
@@ -1446,8 +1446,8 @@ static int elf_dump_thread_status(long s
 
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
-		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
-			  &t->xfpu);
+		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
+			  sizeof(t->xfpu), &t->xfpu);
 		t->num_notes++;
 		sz += notesize(&t->notes[2]);
 	}
@@ -1624,7 +1624,7 @@ static int elf_core_dump(long signr, str
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(current, xfpu))
 		fill_note(notes + numnote++,
-			  "LINUX", NT_PRXFPREG, sizeof(*xfpu), xfpu);
+			  "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
 #endif	
   
 	fs = get_fs();
Index: linux/fs/binfmt_elf_fdpic.c
===================================================================
--- linux.orig/fs/binfmt_elf_fdpic.c
+++ linux/fs/binfmt_elf_fdpic.c
@@ -1417,7 +1417,7 @@ struct elf_thread_status
 	elf_fpregset_t fpu;		/* NT_PRFPREG */
 	struct task_struct *thread;
 #ifdef ELF_CORE_COPY_XFPREGS
-	elf_fpxregset_t xfpu;		/* NT_PRXFPREG */
+	elf_fpxregset_t xfpu;		/* ELF_CORE_XFPREG_TYPE */
 #endif
 	struct memelfnote notes[3];
 	int num_notes;
@@ -1453,8 +1453,8 @@ static int elf_dump_thread_status(long s
 
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
-		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
-			  &t->xfpu);
+		fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
+			  sizeof(t->xfpu), &t->xfpu);
 		t->num_notes++;
 		sz += notesize(&t->notes[2]);
 	}
@@ -1690,7 +1690,7 @@ static int elf_fdpic_core_dump(long sign
 #ifdef ELF_CORE_COPY_XFPREGS
 	if (elf_core_copy_task_xfpregs(current, xfpu))
 		fill_note(notes + numnote++,
-			  "LINUX", NT_PRXFPREG, sizeof(*xfpu), xfpu);
+			  "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
 #endif
 
 	fs = get_fs();
Index: linux/include/asm-i386/elf.h
===================================================================
--- linux.orig/include/asm-i386/elf.h
+++ linux/include/asm-i386/elf.h
@@ -129,6 +129,7 @@ extern int dump_task_extended_fpu (struc
 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
 #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 
 #define VDSO_HIGH_BASE		(__fix_to_virt(FIX_VDSO))
 #define VDSO_CURRENT_BASE	((unsigned long)current->mm->context.vdso)