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doc: Document the MPU pseudomodules

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This commit is contained in:
chrysn 2021-11-04 09:55:18 +01:00
parent 68d0c291a9
commit bb8402fc0b
2 changed files with 14 additions and 4 deletions
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5
cpu/cortexm_common/vectors_cortexm.c
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@ -158,10 +158,7 @@ void reset_handler_default(void)
#endif /* CPU_HAS_BACKUP_RAM */
#ifdef MODULE_MPU_NOEXEC_RAM
/* Mark the RAM non executable. This is a protection mechanism which
* makes exploitation of buffer overflows significantly harder.
*
* This marks the memory region from 0x20000000 to 0x3FFFFFFF as non
/* This marks the memory region from 0x20000000 to 0x3FFFFFFF as non
* executable. This is the Cortex-M SRAM region used for on-chip RAM.
*/
mpu_configure(

13
makefiles/pseudomodules.inc.mk
View File

@ -105,8 +105,21 @@ PSEUDOMODULES += log
PSEUDOMODULES += log_printfnoformat
PSEUDOMODULES += log_color
PSEUDOMODULES += lora
## @defgroup pseudomodule_mpu_stack_guard mpu_stack_guard
## @brief MPU based stack guard
##
## When this module is active (which it is by default on supported MCUs),
## the Memory Protection Unit will be configured to detect stack overflows.
PSEUDOMODULES += mpu_stack_guard
## @defgroup pseudomodule_mpu_noexec_ram mpu_noexec_ram
## @brief Mark RAM as non-executable using the MPU
##
## Mark the RAM non executable.
## This is a protection mechanism which makes exploitation of buffer overflows significantly harder.
PSEUDOMODULES += mpu_noexec_ram
PSEUDOMODULES += mtd_write_page
PSEUDOMODULES += nanocoap_%
PSEUDOMODULES += netdev_default