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arm: add div0 handler for 64-bit division on ARMv7-M
Even though ARMv7-M has a hardware divider, 64-bit division is
handled in software and needs a div0 handler. The libgcc routines
call __aeabi_{i,l}div0 so we alias those to __div0.
Change-Id: I5152c43d39e25e03f31404753f13978a614aca06
+14
-1
+5
apps/plugins/lib/gcc-support.c
+5
apps/plugins/lib/gcc-support.c
···
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{
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asm volatile("bx %0" : : "r"(rb->__div0));
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}
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+
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#if defined(CPU_ARM_MICRO)
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void __aeabi_idiv0(void) __attribute__((alias("__div0")));
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void __aeabi_ldiv0(void) __attribute__((alias("__div0")));
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#endif
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#endif
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void *memcpy(void *dest, const void *src, size_t n)
+1
-1
firmware/export/config.h
+1
-1
firmware/export/config.h
+8
firmware/target/arm/system-arm-micro.c
+8
firmware/target/arm/system-arm-micro.c
···
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while (1);
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}
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+
void __div0(void)
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{
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while (1);
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}
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void __aeabi_idiv0(void) __attribute__((alias("__div0")));
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void __aeabi_ldiv0(void) __attribute__((alias("__div0")));
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+
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#define ATTR_IRQ_HANDLER __attribute__((weak, alias("UIE")))
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void nmi_handler(void) ATTR_IRQ_HANDLER;