39 строки
1,4 КиБ
Go
39 строки
1,4 КиБ
Go
// +build atsamd21 nrf51
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package runtime
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import (
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"unsafe"
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)
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// This function is called at HardFault.
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// Before this function is called, the stack pointer is reset to the initial
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// stack pointer (loaded from addres 0x0) and the previous stack pointer is
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// passed as an argument to this function. This allows for easy inspection of
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// the stack the moment a HardFault occurs, but it means that the stack will be
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// corrupted by this function and thus this handler must not attempt to recover.
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//
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// For details, see:
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// https://community.arm.com/developer/ip-products/system/f/embedded-forum/3257/debugging-a-cortex-m0-hard-fault
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// https://blog.feabhas.com/2013/02/developing-a-generic-hard-fault-handler-for-arm-cortex-m3cortex-m4/
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//export handleHardFault
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func handleHardFault(sp *interruptStack) {
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print("fatal error: ")
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if uintptr(unsafe.Pointer(sp)) < 0x20000000 {
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print("stack overflow")
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} else {
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// TODO: try to find the cause of the hard fault. Especially on
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// Cortex-M3 and higher it is possible to find more detailed information
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// in special status registers.
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print("HardFault")
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}
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print(" with sp=", sp)
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if uintptr(unsafe.Pointer(&sp.PC)) >= 0x20000000 {
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// Only print the PC if it points into memory.
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// It may not point into memory during a stack overflow, so check that
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// first before accessing the stack.
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print(" pc=", sp.PC)
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}
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println()
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abort()
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}
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