diff options
| author | Xiuwen Cai <[email protected]> | 2023-05-12 10:13:42 +0800 |
|---|---|---|
| committer | GitHub <[email protected]> | 2023-05-12 10:13:42 +0800 |
| commit | 6b8ece0ff28fb0160a2fdf51c09df09d587f4575 (patch) | |
| tree | 7f1f6ba9a727d43831eedd020ea50d027c1053c8 /common/src | |
| parent | 6d9f25fac9d091a097c70f9cbff0e50252fde52a (diff) | |
Add random number stack filling option. (#257)
Co-authored-by: TiejunZhou <[email protected]>
Diffstat (limited to 'common/src')
| -rw-r--r-- | common/src/tx_initialize_kernel_enter.c | 9 | ||||
| -rw-r--r-- | common/src/tx_thread_create.c | 17 |
2 files changed, 24 insertions, 2 deletions
diff --git a/common/src/tx_initialize_kernel_enter.c b/common/src/tx_initialize_kernel_enter.c index 12e77dc5..c019a797 100644 --- a/common/src/tx_initialize_kernel_enter.c +++ b/common/src/tx_initialize_kernel_enter.c @@ -49,7 +49,7 @@ TX_SAFETY_CRITICAL_EXCEPTION_HANDLER /* FUNCTION RELEASE */ /* */ /* _tx_initialize_kernel_enter PORTABLE C */ -/* 6.1.11 */ +/* 6.x */ /* AUTHOR */ /* */ /* William E. Lamie, Microsoft Corporation */ @@ -93,6 +93,10 @@ TX_SAFETY_CRITICAL_EXCEPTION_HANDLER /* 04-25-2022 Scott Larson Modified comment(s), */ /* added EPK initialization, */ /* resulting in version 6.1.11 */ +/* xx-xx-xxxx Xiuwen Cai Modified comment(s), */ +/* added random generator */ +/* initialization, */ +/* resulting in version 6.x */ /* */ /**************************************************************************/ VOID _tx_initialize_kernel_enter(VOID) @@ -133,6 +137,9 @@ VOID _tx_initialize_kernel_enter(VOID) later used to represent interrupt nesting. */ _tx_thread_system_state = TX_INITIALIZE_IN_PROGRESS; + /* Optional random number generator initialization. */ + TX_INITIALIZE_RANDOM_GENERATOR_INITIALIZATION + /* Call the application provided initialization function. Pass the first available memory address to it. */ tx_application_define(_tx_initialize_unused_memory); diff --git a/common/src/tx_thread_create.c b/common/src/tx_thread_create.c index fc8873d4..d4ee0f49 100644 --- a/common/src/tx_thread_create.c +++ b/common/src/tx_thread_create.c @@ -36,7 +36,7 @@ /* FUNCTION RELEASE */ /* */ /* _tx_thread_create PORTABLE C */ -/* 6.1.8 */ +/* 6.x */ /* AUTHOR */ /* */ /* William E. Lamie, Microsoft Corporation */ @@ -88,6 +88,10 @@ /* supported TX_MISRA_ENABLE, */ /* 08-02-2021 Scott Larson Removed unneeded cast, */ /* resulting in version 6.1.8 */ +/* xx-xx-xxxx Xiuwen Cai Modified comment(s), */ +/* added option for random */ +/* number stack filling, */ +/* resulting in version 6.x */ /* */ /**************************************************************************/ UINT _tx_thread_create(TX_THREAD *thread_ptr, CHAR *name_ptr, VOID (*entry_function)(ULONG id), ULONG entry_input, @@ -109,6 +113,17 @@ ALIGN_TYPE updated_stack_start; #endif #ifndef TX_DISABLE_STACK_FILLING +#if defined(TX_ENABLE_RANDOM_NUMBER_STACK_FILLING) && defined(TX_ENABLE_STACK_CHECKING) + + /* Initialize the stack fill value to a 8-bit random value. */ + thread_ptr -> tx_thread_stack_fill_value = ((ULONG) TX_RAND()) & 0xFFUL; + + /* Duplicate the random value in each of the 4 bytes of the stack fill value. */ + thread_ptr -> tx_thread_stack_fill_value = thread_ptr -> tx_thread_stack_fill_value | + (thread_ptr -> tx_thread_stack_fill_value << 8) | + (thread_ptr -> tx_thread_stack_fill_value << 16) | + (thread_ptr -> tx_thread_stack_fill_value << 24); +#endif /* Set the thread stack to a pattern prior to creating the initial stack frame. This pattern is used by the stack checking routines |