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drivers: Perform a runtime check if a driver is capable of an operation

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Driver APIs might not implement all operations, making it possible for
a user thread to get the kernel to execute a function at 0x00000000.

Perform runtime checks in all the driver handlers, checking if they're
capable of performing the requested operation.

Fixes #6907.

Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
This commit is contained in:
Leandro Pereira 2018-04-04 13:50:32 -07:00 • committed by Anas Nashif
commit c200367b68
20 changed files with 224 additions and 119 deletions
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27
drivers/rtc/rtc_handlers.c
View file

@ -7,17 +7,32 @@
#include <syscall_handler.h>
#include <rtc.h>
_SYSCALL_HANDLER1_SIMPLE(rtc_read, K_OBJ_DRIVER_RTC, struct device *);
_SYSCALL_HANDLER(rtc_read, dev)
{
_SYSCALL_DRIVER_RTC(dev, read);
return _impl_rtc_read((struct device *)dev);
}
_SYSCALL_HANDLER1_SIMPLE_VOID(rtc_enable, K_OBJ_DRIVER_RTC, struct device *);
_SYSCALL_HANDLER(rtc_enable, dev)
{
_SYSCALL_DRIVER_RTC(dev, enable);
return _impl_rtc_enable((struct device *)dev);
}
_SYSCALL_HANDLER1_SIMPLE_VOID(rtc_disable, K_OBJ_DRIVER_RTC, struct device *);
_SYSCALL_HANDLER(rtc_disable, dev)
{
_SYSCALL_DRIVER_RTC(dev, disable);
return _impl_rtc_disable((struct device *)dev);
}
_SYSCALL_HANDLER(rtc_set_alarm, dev, alarm_val)
{
_SYSCALL_OBJ(dev, K_OBJ_DRIVER_RTC);
_SYSCALL_DRIVER_RTC(dev, set_alarm);
return _impl_rtc_set_alarm((struct device *)dev, alarm_val);
}
_SYSCALL_HANDLER1_SIMPLE(rtc_get_pending_int, K_OBJ_DRIVER_RTC,
struct device *);
_SYSCALL_HANDLER(rtc_get_pending_int, dev)
{
_SYSCALL_DRIVER_RTC(dev, get_pending_int);
return _impl_rtc_get_pending_int((struct device *)dev);
}