* [PATCH 2/23] Make register values available to Alpha panic notifiers
@ 2010-04-12 6:06 ` David VomLehn
0 siblings, 0 replies; 5+ messages in thread
From: David VomLehn @ 2010-04-12 6:06 UTC (permalink / raw)
To: to, linux-arch@vger.kernel.org, linux-arch; +Cc: akpm, linux-kernel, maint_arch
The save_ptregs() function has not been tested or even built. I will need
help to complete this.
Signed-off-by: David VomLehn <dvomlehn@cisco.com>
---
arch/alpha/include/asm/ptrace.h | 124 +++++++++++++++++++++++++++++++++++++++
1 files changed, 124 insertions(+), 0 deletions(-)
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index 65cf3e2..952d177 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -79,6 +79,130 @@ extern void show_regs(struct pt_regs *);
#define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
+/* Macros for saving the contents of registers and for the output constraint
+ * for those registers */
+#include "/home/vomlehn/git/kernel.org/linux/ptreg.h"
+#define PTREG_SAVE(r, name) "stq " #r ", %[" #name "]\n"
+#define PTREG_SAVE_R(i) PTREG_SAVE_I($, r, i)
+
+#define PTREG_OUT_R(regsp, i) PTREG_OUT_I(regsp, r, r, i)
+
+#define arch_has_save_ptregs 1
+
+/**
+ * save_ptregs - save processor registers for backtracing
+ * @regs: Pointer to &struct pt_regs structure in which to save the
+ * registers
+ *
+ * Returns a constant pointer to @regs.
+ *
+ * This function must be called first in a function. There must be no
+ * auto variables defined that are initialized before calling this function.
+ */
+static __always_inline
+const struct pt_regs *save_ptregs(struct pt_regs *regs)
+{
+ __asm__ __volatile__ (
+ /* Based on the SAVE_ALL code */
+ PTREG_SAVE_R(0)
+ PTREG_SAVE_R(1)
+ PTREG_SAVE_R(2)
+ PTREG_SAVE_R(3)
+ PTREG_SAVE_R(4)
+ PTREG_SAVE_R(28)
+ "lda $2, alpha_mv\n"
+ PTREG_SAVE_R(5)
+ PTREG_SAVE_R(6)
+ PTREG_SAVE_R(7)
+ PTREG_SAVE_R(8)
+ PTREG_SAVE_R(19)
+ PTREG_SAVE_R(20)
+ PTREG_SAVE_R(21)
+ "ldq $2, HAE_CACHE($2)\n"
+ PTREG_SAVE_R(22)
+ PTREG_SAVE_R(23)
+ PTREG_SAVE_R(24)
+ PTREG_SAVE_R(25)
+ PTREG_SAVE_R(26)
+ PTREG_SAVE_R(27)
+ PTREG_SAVE($2, hae)
+ PTREG_SAVE_R(16)
+ PTREG_SAVE_R(17)
+ PTREG_SAVE_R(18)
+
+ PTREG_SAVE_R(9)
+ PTREG_SAVE_R(10)
+ PTREG_SAVE_R(11)
+ PTREG_SAVE_R(12)
+ PTREG_SAVE_R(13)
+ PTREG_SAVE_R(14)
+ PTREG_SAVE_R(15)
+ PTREG_SAVE_R(29)
+ PTREG_SAVE_R(30)
+ PTREG_SAVE_R(31)
+ PTREG_SAVE_REG($gp, gp)
+ PTREG_SAVE_REG($31, ps)
+
+ /* These are almost certainly wrong */
+ PTREG_SAVE_REG(trap_a0, trap_a0)
+ PTREG_SAVE_REG(trap_a1, trap_a1)
+ PTREG_SAVE_REG(trap_a2, trap_a2)
+ /*
+ * The current location is the one for which the register
+ * values are correct, even if some had been modified on
+ * function entry. So, the current location is the value to
+ * save as the execution address.
+ */
+ "1b:\n"
+ "lda $2, 1b\n"
+ PTREG_SAVE($2, pc)
+ :
+ PTREG_OUT_R(regs, 0),
+ PTREG_OUT_R(regs, 1),
+ PTREG_OUT_R(regs, 2),
+ PTREG_OUT_R(regs, 3),
+ PTREG_OUT_R(regs, 4),
+ PTREG_OUT_R(regs, 5),
+ PTREG_OUT_R(regs, 6),
+ PTREG_OUT_R(regs, 7),
+ PTREG_OUT_R(regs, 8),
+ PTREG_OUT_R(regs, 9),
+ PTREG_OUT_R(regs, 10),
+ PTREG_OUT_R(regs, 11),
+ PTREG_OUT_R(regs, 12),
+ PTREG_OUT_R(regs, 13),
+ PTREG_OUT_R(regs, 14),
+ PTREG_OUT_R(regs, 15),
+ PTREG_OUT_R(regs, 16),
+ PTREG_OUT_R(regs, 17),
+ PTREG_OUT_R(regs, 18),
+ PTREG_OUT_R(regs, 19),
+ PTREG_OUT_R(regs, 20),
+ PTREG_OUT_R(regs, 21),
+ PTREG_OUT_R(regs, 22),
+ PTREG_OUT_R(regs, 23),
+ PTREG_OUT_R(regs, 24),
+ PTREG_OUT_R(regs, 25),
+ PTREG_OUT_R(regs, 26),
+ PTREG_OUT_R(regs, 27),
+ PTREG_OUT_R(regs, 28),
+ PTREG_OUT_R(regs, 29),
+ PTREG_OUT_R(regs, 30),
+ PTREG_OUT_R(regs, 31),
+
+ PTREG_OUT(regs, hae, hae),
+ PTREG_OUT(regs, trap_a0, trap_a0),
+ PTREG_OUT(regs, trap_a1, trap_a1),
+ PTREG_OUT(regs, trap_a2, trap_a2),
+ PTREG_OUT(regs, ps, ps),
+ PTREG_OUT(regs, pc, pc),
+ PTREG_OUT(regs, gp, gp)
+ :
+ "$2"
+ );
+
+ return regs;
+}
#endif
#endif
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/23] Make register values available to Alpha panic notifiers
@ 2010-04-12 6:06 ` David VomLehn
0 siblings, 0 replies; 5+ messages in thread
From: David VomLehn @ 2010-04-12 6:06 UTC (permalink / raw)
To: to, linux-arch@vger.kernel.org; +Cc: akpm, linux-kernel, maint_arch
The save_ptregs() function has not been tested or even built. I will need
help to complete this.
Signed-off-by: David VomLehn <dvomlehn@cisco.com>
---
arch/alpha/include/asm/ptrace.h | 124 +++++++++++++++++++++++++++++++++++++++
1 files changed, 124 insertions(+), 0 deletions(-)
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index 65cf3e2..952d177 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -79,6 +79,130 @@ extern void show_regs(struct pt_regs *);
#define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
+/* Macros for saving the contents of registers and for the output constraint
+ * for those registers */
+#include "/home/vomlehn/git/kernel.org/linux/ptreg.h"
+#define PTREG_SAVE(r, name) "stq " #r ", %[" #name "]\n"
+#define PTREG_SAVE_R(i) PTREG_SAVE_I($, r, i)
+
+#define PTREG_OUT_R(regsp, i) PTREG_OUT_I(regsp, r, r, i)
+
+#define arch_has_save_ptregs 1
+
+/**
+ * save_ptregs - save processor registers for backtracing
+ * @regs: Pointer to &struct pt_regs structure in which to save the
+ * registers
+ *
+ * Returns a constant pointer to @regs.
+ *
+ * This function must be called first in a function. There must be no
+ * auto variables defined that are initialized before calling this function.
+ */
+static __always_inline
+const struct pt_regs *save_ptregs(struct pt_regs *regs)
+{
+ __asm__ __volatile__ (
+ /* Based on the SAVE_ALL code */
+ PTREG_SAVE_R(0)
+ PTREG_SAVE_R(1)
+ PTREG_SAVE_R(2)
+ PTREG_SAVE_R(3)
+ PTREG_SAVE_R(4)
+ PTREG_SAVE_R(28)
+ "lda $2, alpha_mv\n"
+ PTREG_SAVE_R(5)
+ PTREG_SAVE_R(6)
+ PTREG_SAVE_R(7)
+ PTREG_SAVE_R(8)
+ PTREG_SAVE_R(19)
+ PTREG_SAVE_R(20)
+ PTREG_SAVE_R(21)
+ "ldq $2, HAE_CACHE($2)\n"
+ PTREG_SAVE_R(22)
+ PTREG_SAVE_R(23)
+ PTREG_SAVE_R(24)
+ PTREG_SAVE_R(25)
+ PTREG_SAVE_R(26)
+ PTREG_SAVE_R(27)
+ PTREG_SAVE($2, hae)
+ PTREG_SAVE_R(16)
+ PTREG_SAVE_R(17)
+ PTREG_SAVE_R(18)
+
+ PTREG_SAVE_R(9)
+ PTREG_SAVE_R(10)
+ PTREG_SAVE_R(11)
+ PTREG_SAVE_R(12)
+ PTREG_SAVE_R(13)
+ PTREG_SAVE_R(14)
+ PTREG_SAVE_R(15)
+ PTREG_SAVE_R(29)
+ PTREG_SAVE_R(30)
+ PTREG_SAVE_R(31)
+ PTREG_SAVE_REG($gp, gp)
+ PTREG_SAVE_REG($31, ps)
+
+ /* These are almost certainly wrong */
+ PTREG_SAVE_REG(trap_a0, trap_a0)
+ PTREG_SAVE_REG(trap_a1, trap_a1)
+ PTREG_SAVE_REG(trap_a2, trap_a2)
+ /*
+ * The current location is the one for which the register
+ * values are correct, even if some had been modified on
+ * function entry. So, the current location is the value to
+ * save as the execution address.
+ */
+ "1b:\n"
+ "lda $2, 1b\n"
+ PTREG_SAVE($2, pc)
+ :
+ PTREG_OUT_R(regs, 0),
+ PTREG_OUT_R(regs, 1),
+ PTREG_OUT_R(regs, 2),
+ PTREG_OUT_R(regs, 3),
+ PTREG_OUT_R(regs, 4),
+ PTREG_OUT_R(regs, 5),
+ PTREG_OUT_R(regs, 6),
+ PTREG_OUT_R(regs, 7),
+ PTREG_OUT_R(regs, 8),
+ PTREG_OUT_R(regs, 9),
+ PTREG_OUT_R(regs, 10),
+ PTREG_OUT_R(regs, 11),
+ PTREG_OUT_R(regs, 12),
+ PTREG_OUT_R(regs, 13),
+ PTREG_OUT_R(regs, 14),
+ PTREG_OUT_R(regs, 15),
+ PTREG_OUT_R(regs, 16),
+ PTREG_OUT_R(regs, 17),
+ PTREG_OUT_R(regs, 18),
+ PTREG_OUT_R(regs, 19),
+ PTREG_OUT_R(regs, 20),
+ PTREG_OUT_R(regs, 21),
+ PTREG_OUT_R(regs, 22),
+ PTREG_OUT_R(regs, 23),
+ PTREG_OUT_R(regs, 24),
+ PTREG_OUT_R(regs, 25),
+ PTREG_OUT_R(regs, 26),
+ PTREG_OUT_R(regs, 27),
+ PTREG_OUT_R(regs, 28),
+ PTREG_OUT_R(regs, 29),
+ PTREG_OUT_R(regs, 30),
+ PTREG_OUT_R(regs, 31),
+
+ PTREG_OUT(regs, hae, hae),
+ PTREG_OUT(regs, trap_a0, trap_a0),
+ PTREG_OUT(regs, trap_a1, trap_a1),
+ PTREG_OUT(regs, trap_a2, trap_a2),
+ PTREG_OUT(regs, ps, ps),
+ PTREG_OUT(regs, pc, pc),
+ PTREG_OUT(regs, gp, gp)
+ :
+ "$2"
+ );
+
+ return regs;
+}
#endif
#endif
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 2/23] Make register values available to Alpha panic notifiers
2010-04-12 6:06 ` David VomLehn
(?)
@ 2010-04-12 19:06 ` Sam Ravnborg
2010-04-14 21:10 ` David VomLehn
-1 siblings, 1 reply; 5+ messages in thread
From: Sam Ravnborg @ 2010-04-12 19:06 UTC (permalink / raw)
To: David VomLehn; +Cc: linux-arch, akpm, linux-kernel
On Sun, Apr 11, 2010 at 11:06:13PM -0700, David VomLehn wrote:
> The save_ptregs() function has not been tested or even built. I will need
> help to complete this.
>
> Signed-off-by: David VomLehn <dvomlehn@cisco.com>
> ---
> arch/alpha/include/asm/ptrace.h | 124 +++++++++++++++++++++++++++++++++++++++
> 1 files changed, 124 insertions(+), 0 deletions(-)
>
> diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
> index 65cf3e2..952d177 100644
> --- a/arch/alpha/include/asm/ptrace.h
> +++ b/arch/alpha/include/asm/ptrace.h
> @@ -79,6 +79,130 @@ extern void show_regs(struct pt_regs *);
>
> #define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
>
> +/* Macros for saving the contents of registers and for the output constraint
> + * for those registers */
> +#include "/home/vomlehn/git/kernel.org/linux/ptreg.h"
The above include needs fixing.
Sam
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 2/23] Make register values available to Alpha panic notifiers
2010-04-12 19:06 ` Sam Ravnborg
@ 2010-04-14 21:10 ` David VomLehn
0 siblings, 0 replies; 5+ messages in thread
From: David VomLehn @ 2010-04-14 21:10 UTC (permalink / raw)
To: Sam Ravnborg; +Cc: linux-arch, akpm, linux-kernel
Sam Ravnborg wrote:
> On Sun, Apr 11, 2010 at 11:06:13PM -0700, David VomLehn wrote:
>
>> The save_ptregs() function has not been tested or even built. I will need
>> help to complete this.
>>
>> Signed-off-by: David VomLehn <dvomlehn@cisco.com>
>> ---
>> arch/alpha/include/asm/ptrace.h | 124 +++++++++++++++++++++++++++++++++++++++
>> 1 files changed, 124 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
>> index 65cf3e2..952d177 100644
>> --- a/arch/alpha/include/asm/ptrace.h
>> +++ b/arch/alpha/include/asm/ptrace.h
>> @@ -79,6 +79,130 @@ extern void show_regs(struct pt_regs *);
>>
>> #define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
>>
>> +/* Macros for saving the contents of registers and for the output constraint
>> + * for those registers */
>> +#include "/home/vomlehn/git/kernel.org/linux/ptreg.h"
>>
> The above include needs fixing.
>
> Sam
>
Definitely, thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH 2/23] Make register values available to Alpha panic notifiers
@ 2010-04-12 6:03 David VomLehn
0 siblings, 0 replies; 5+ messages in thread
From: David VomLehn @ 2010-04-12 6:03 UTC (permalink / raw)
To: to, linux_arch, linux_arch; +Cc: akpm, linux-kernel, maint_arch
The save_ptregs() function has not been tested or even built. I will need
help to complete this.
Signed-off-by: David VomLehn <dvomlehn@cisco.com>
---
arch/alpha/include/asm/ptrace.h | 124 +++++++++++++++++++++++++++++++++++++++
1 files changed, 124 insertions(+), 0 deletions(-)
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index 65cf3e2..952d177 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -79,6 +79,130 @@ extern void show_regs(struct pt_regs *);
#define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
+/* Macros for saving the contents of registers and for the output constraint
+ * for those registers */
+#include "/home/vomlehn/git/kernel.org/linux/ptreg.h"
+#define PTREG_SAVE(r, name) "stq " #r ", %[" #name "]\n"
+#define PTREG_SAVE_R(i) PTREG_SAVE_I($, r, i)
+
+#define PTREG_OUT_R(regsp, i) PTREG_OUT_I(regsp, r, r, i)
+
+#define arch_has_save_ptregs 1
+
+/**
+ * save_ptregs - save processor registers for backtracing
+ * @regs: Pointer to &struct pt_regs structure in which to save the
+ * registers
+ *
+ * Returns a constant pointer to @regs.
+ *
+ * This function must be called first in a function. There must be no
+ * auto variables defined that are initialized before calling this function.
+ */
+static __always_inline
+const struct pt_regs *save_ptregs(struct pt_regs *regs)
+{
+ __asm__ __volatile__ (
+ /* Based on the SAVE_ALL code */
+ PTREG_SAVE_R(0)
+ PTREG_SAVE_R(1)
+ PTREG_SAVE_R(2)
+ PTREG_SAVE_R(3)
+ PTREG_SAVE_R(4)
+ PTREG_SAVE_R(28)
+ "lda $2, alpha_mv\n"
+ PTREG_SAVE_R(5)
+ PTREG_SAVE_R(6)
+ PTREG_SAVE_R(7)
+ PTREG_SAVE_R(8)
+ PTREG_SAVE_R(19)
+ PTREG_SAVE_R(20)
+ PTREG_SAVE_R(21)
+ "ldq $2, HAE_CACHE($2)\n"
+ PTREG_SAVE_R(22)
+ PTREG_SAVE_R(23)
+ PTREG_SAVE_R(24)
+ PTREG_SAVE_R(25)
+ PTREG_SAVE_R(26)
+ PTREG_SAVE_R(27)
+ PTREG_SAVE($2, hae)
+ PTREG_SAVE_R(16)
+ PTREG_SAVE_R(17)
+ PTREG_SAVE_R(18)
+
+ PTREG_SAVE_R(9)
+ PTREG_SAVE_R(10)
+ PTREG_SAVE_R(11)
+ PTREG_SAVE_R(12)
+ PTREG_SAVE_R(13)
+ PTREG_SAVE_R(14)
+ PTREG_SAVE_R(15)
+ PTREG_SAVE_R(29)
+ PTREG_SAVE_R(30)
+ PTREG_SAVE_R(31)
+ PTREG_SAVE_REG($gp, gp)
+ PTREG_SAVE_REG($31, ps)
+
+ /* These are almost certainly wrong */
+ PTREG_SAVE_REG(trap_a0, trap_a0)
+ PTREG_SAVE_REG(trap_a1, trap_a1)
+ PTREG_SAVE_REG(trap_a2, trap_a2)
+ /*
+ * The current location is the one for which the register
+ * values are correct, even if some had been modified on
+ * function entry. So, the current location is the value to
+ * save as the execution address.
+ */
+ "1b:\n"
+ "lda $2, 1b\n"
+ PTREG_SAVE($2, pc)
+ :
+ PTREG_OUT_R(regs, 0),
+ PTREG_OUT_R(regs, 1),
+ PTREG_OUT_R(regs, 2),
+ PTREG_OUT_R(regs, 3),
+ PTREG_OUT_R(regs, 4),
+ PTREG_OUT_R(regs, 5),
+ PTREG_OUT_R(regs, 6),
+ PTREG_OUT_R(regs, 7),
+ PTREG_OUT_R(regs, 8),
+ PTREG_OUT_R(regs, 9),
+ PTREG_OUT_R(regs, 10),
+ PTREG_OUT_R(regs, 11),
+ PTREG_OUT_R(regs, 12),
+ PTREG_OUT_R(regs, 13),
+ PTREG_OUT_R(regs, 14),
+ PTREG_OUT_R(regs, 15),
+ PTREG_OUT_R(regs, 16),
+ PTREG_OUT_R(regs, 17),
+ PTREG_OUT_R(regs, 18),
+ PTREG_OUT_R(regs, 19),
+ PTREG_OUT_R(regs, 20),
+ PTREG_OUT_R(regs, 21),
+ PTREG_OUT_R(regs, 22),
+ PTREG_OUT_R(regs, 23),
+ PTREG_OUT_R(regs, 24),
+ PTREG_OUT_R(regs, 25),
+ PTREG_OUT_R(regs, 26),
+ PTREG_OUT_R(regs, 27),
+ PTREG_OUT_R(regs, 28),
+ PTREG_OUT_R(regs, 29),
+ PTREG_OUT_R(regs, 30),
+ PTREG_OUT_R(regs, 31),
+
+ PTREG_OUT(regs, hae, hae),
+ PTREG_OUT(regs, trap_a0, trap_a0),
+ PTREG_OUT(regs, trap_a1, trap_a1),
+ PTREG_OUT(regs, trap_a2, trap_a2),
+ PTREG_OUT(regs, ps, ps),
+ PTREG_OUT(regs, pc, pc),
+ PTREG_OUT(regs, gp, gp)
+ :
+ "$2"
+ );
+
+ return regs;
+}
#endif
#endif
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2010-04-14 21:11 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2010-04-12 6:06 [PATCH 2/23] Make register values available to Alpha panic notifiers David VomLehn
2010-04-12 6:06 ` David VomLehn
2010-04-12 19:06 ` Sam Ravnborg
2010-04-14 21:10 ` David VomLehn
-- strict thread matches above, loose matches on Subject: below --
2010-04-12 6:03 David VomLehn
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