Grazvydas Ignotas : server: Set debug enable bits briefly to commit the addresses to kernel.
Alexandre Julliard
julliard at winehq.org
Mon Jul 18 12:46:59 CDT 2011
Module: wine
Branch: master
Commit: 2cc56f379c3a17d3274fc4b7e91ac648e10e641d
URL: http://source.winehq.org/git/wine.git/?a=commit;h=2cc56f379c3a17d3274fc4b7e91ac648e10e641d
Author: Grazvydas Ignotas <notasas at gmail.com>
Date: Fri Jul 15 23:19:11 2011 +0300
server: Set debug enable bits briefly to commit the addresses to kernel.
---
dlls/ntdll/tests/exception.c | 1 -
server/ptrace.c | 3 +++
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/dlls/ntdll/tests/exception.c b/dlls/ntdll/tests/exception.c
index 9f80651..5d3f8c1 100644
--- a/dlls/ntdll/tests/exception.c
+++ b/dlls/ntdll/tests/exception.c
@@ -510,7 +510,6 @@ static void check_debug_registers(int test_num, const struct dbgreg_test *test)
CHECK_DEBUG_REG(0, ~0);
CHECK_DEBUG_REG(1, ~0);
CHECK_DEBUG_REG(2, ~0);
-if (test_num == 2) todo_wine
CHECK_DEBUG_REG(3, ~0);
CHECK_DEBUG_REG(6, 0x0f);
CHECK_DEBUG_REG(7, ~0xdc00);
diff --git a/server/ptrace.c b/server/ptrace.c
index 6df9555..51157ab 100644
--- a/server/ptrace.c
+++ b/server/ptrace.c
@@ -605,6 +605,8 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
if (thread->context) thread->context->debug.i386_regs.dr3 = context->debug.i386_regs.dr3;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->debug.i386_regs.dr6 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr6 = context->debug.i386_regs.dr6;
+ /* Linux 2.6.33+ needs enable bits set briefly to update value returned by PEEKUSER later */
+ ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 | 0x55 );
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr7 = context->debug.i386_regs.dr7;
break;
@@ -620,6 +622,7 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
if (thread->context) thread->context->debug.x86_64_regs.dr3 = context->debug.x86_64_regs.dr3;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->debug.x86_64_regs.dr6 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr6 = context->debug.x86_64_regs.dr6;
+ ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 | 0x55 );
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr7 = context->debug.x86_64_regs.dr7;
break;
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