Grazvydas Ignotas : server: Set RW and LEN bits of DR7 before setting DR0-DR3.
Alexandre Julliard
julliard at winehq.org
Mon Jul 18 12:46:59 CDT 2011
Module: wine
Branch: master
Commit: fa179b1c26c2d6ba92f1e4c3ea651c45bf509d9d
URL: http://source.winehq.org/git/wine.git/?a=commit;h=fa179b1c26c2d6ba92f1e4c3ea651c45bf509d9d
Author: Grazvydas Ignotas <notasas at gmail.com>
Date: Fri Jul 15 23:19:10 2011 +0300
server: Set RW and LEN bits of DR7 before setting DR0-DR3.
---
dlls/ntdll/tests/exception.c | 2 --
server/ptrace.c | 3 +++
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/dlls/ntdll/tests/exception.c b/dlls/ntdll/tests/exception.c
index 194bfae..9f80651 100644
--- a/dlls/ntdll/tests/exception.c
+++ b/dlls/ntdll/tests/exception.c
@@ -509,12 +509,10 @@ static void check_debug_registers(int test_num, const struct dbgreg_test *test)
CHECK_DEBUG_REG(0, ~0);
CHECK_DEBUG_REG(1, ~0);
-if (test_num == 2) todo_wine
CHECK_DEBUG_REG(2, ~0);
if (test_num == 2) todo_wine
CHECK_DEBUG_REG(3, ~0);
CHECK_DEBUG_REG(6, 0x0f);
-if (test_num == 2) todo_wine
CHECK_DEBUG_REG(7, ~0xdc00);
}
diff --git a/server/ptrace.c b/server/ptrace.c
index 69747ed..6df9555 100644
--- a/server/ptrace.c
+++ b/server/ptrace.c
@@ -593,6 +593,8 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
switch (context->cpu)
{
case CPU_x86:
+ /* Linux 2.6.33+ does DR0-DR3 alignment validation, so it has to know LEN bits first */
+ if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 & 0xffff0000 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->debug.i386_regs.dr0 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr0 = context->debug.i386_regs.dr0;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->debug.i386_regs.dr1 ) == -1) goto error;
@@ -607,6 +609,7 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
if (thread->context) thread->context->debug.i386_regs.dr7 = context->debug.i386_regs.dr7;
break;
case CPU_x86_64:
+ if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 & 0xffff0000 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->debug.x86_64_regs.dr0 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr0 = context->debug.x86_64_regs.dr0;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->debug.x86_64_regs.dr1 ) == -1) goto error;
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