Changeset d70ebffe in mainline for kernel/arch/sparc64/src/debug/stacktrace.c

Timestamp:

2014-10-27T15:10:14Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

aef669b

Parents:

ec443d5

Message:

Let the fast MMU traps use exc_dispatch() in their slow-path.

In order to get proper exception accounting, the MMU related traps need
to go through the code in exc_dispatch(). To make this possible, we pass
the DTLB Tag Access register in istate_t in order to make way for the
trap type argument, which needs to be passed as the first argument to
exc_dispatch().

As a collateral change, this commit modifies the istate_t structure to
match the SPARC V9 ABI stack frame layout. It gives us a richer istate_t
with more information in it and also simplifies calculation of stack
offsets inside of preemptible_handler.

File:

• kernel/arch/sparc64/src/debug/stacktrace.c (modified) (2 diffs)

kernel/arch/sparc64/src/debug/stacktrace.c

@@ -42 +42 @@
 #include <arch/trap/trap_table.h>
 
+#include <arch/istate_struct.h>
+
 #if defined(SUN4V)
 #include <arch/sun4v/arch.h>
@@ -62 +64 @@
 
         kstack += STACK_BIAS;
-        kstack -= PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE;
+        kstack -= ISTATE_SIZE;
 
         if (THREAD && (ctx->fp == kstack))