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patterns: Added ARM Cortex M vector table pattern (#23)

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WerWolv
2021-10-18 10:01:17 +02:00
parent b2ff4dc4c0
commit 19a0c7143a
2 changed files with 55 additions and 0 deletions
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README.md
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@@ -22,6 +22,7 @@ Hex patterns, include patterns and magic files for the use with the ImHex Hex Ed
| NACP | | `patterns/nacp.hexpat` | Nintendo Switch NACP files |
| NRO | | `patterns/nro.hexpat` | Nintendo Switch NRO files |
| Java Class | `application/x-java-applet` | `patterns/java_class.hexpat` | Java Class files |
| ARM VTOR | | `patterns/arm_cm_vtor.hexpat` | ARM Cortex M Vector Table Layout |
### Pattern Libraries

54
patterns/arm_cm_vtor.hexpat Normal file
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@@ -0,0 +1,54 @@
#pragma endian little
#define VTOR 0x00000000
#define EXTERNAL_INTERRUPT_COUNT 64
using Address = u32;
struct Exceptions {
Address reset [[name("Reset Handler")]];
Address nmi [[name("Non-maskable Interrupt Handler")]];
Address hard_fault [[name("HardFault Handler")]];
Address mem_manage [[name("Memory Protection Error Handler")]];
Address bus_fault [[name("Bus Fault Handler")]];
Address usage_fault [[name("UsageFault (Instruction Execution fault) Handler")]];
Address reserved_1[4] [[hidden]];
Address sv_call [[name("Synchronous Supervisor Call (SVC Instruction) Handler")]];
Address debug_monitor [[name("Synchronous Debug Event Handler")]];
Address reserved_2[1] [[hidden]];
Address pend_sv [[name("Asynchronous Supervisor Call Handler")]];
Address sys_tick [[name("System Timer Tick Handler")]];
};
struct ExternalInterrupts {
Address external_interrupt[EXTERNAL_INTERRUPT_COUNT] [[inline]];
};
struct VectorTable {
Address initial_sp [[name("Initial Stack Pointer Value")]];
Exceptions exceptions [[inline, name("Exceptions")]];
ExternalInterrupts external_interrupts [[name("External Interrupts")]];
};
VectorTable vector_table @ VTOR;
fn main() {
u32 table_size = sizeof(vector_table);
u32 default_handler_address = 0x00;
for (u32 i = 4, i < table_size, i = i + 4) {
u32 occurrences = 0;
for (u32 j = 4, j < table_size, j = j + 4) {
if (std::mem::read_unsigned(i, 4) == std::mem::read_unsigned(j, 4)) {
occurrences = occurrences + 1;
if (occurrences > 1)
default_handler_address = std::mem::read_unsigned(i, 4);
}
}
}
if (default_handler_address != 0x00)
std::print("Default Handler implementation at 0x{:08X}", default_handler_address);
};