Enabled uVisor secure mode for K64F #1936
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If you don't specify the start address of a section explicitly, that section can end up at different addresses depending on its alignment. If the alignment of a section is not explicitly set, it inherits it from the element with the highest alignment inside that section. Since the uVisor code is in the .text section, and it *must* end up at a known location, we set the start address of .text to 0x410, which is the value that the uVisor binary expects.
This allows FEATURE_UVISOR to virtualize the NVIC calls.
This is a hack to get debug builds applications that use uVisor to work. The assertions in core_util_critical_section fail because interrupts can't actually be disabled from unprivileged mode. Without this hack, core_util_critical_section_enter() calls mbed_assert_internal() when the assertion fails, which calls core_util_critical_section_enter() again, which calls mbed_assert_internal() again; this is infinite recursion. core_util_critical_section_enter needs some fixing.
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@mbed-bot: TEST HOST_OSES=windows |
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[Build 476] |
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@sg- @0xc0170 @AlessandroA @Patater @niklas-arm