Differential D15191 Diff 44667 sys/arm/include/cpufunc.h

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sys/arm/include/cpufunc.h

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	#ifdef _KERNEL			#ifdef _KERNEL

	#include <sys/types.h>			#include <sys/types.h>
	#include <machine/armreg.h>			#include <machine/armreg.h>

	static __inline void			static __inline void
	breakpoint(void)			breakpoint(void)
	{			{
	__asm(".word 0xe7ffffff");			__asm("udf 0xffff");
	}			}

	struct cpu_functions {			struct cpu_functions {

	/* CPU functions */			/* CPU functions */
	#if __ARM_ARCH < 6			#if __ARM_ARCH < 6
	void (*cf_cpwait) (void);			void (*cf_cpwait) (void);

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	extern int arm_pcache_unified;			extern int arm_pcache_unified;

	extern int arm_dcache_align;			extern int arm_dcache_align;
	extern int arm_dcache_align_mask;			extern int arm_dcache_align_mask;

	extern u_int arm_cache_level;			extern u_int arm_cache_level;
	extern u_int arm_cache_loc;			extern u_int arm_cache_loc;
	extern u_int arm_cache_type[14];			extern u_int arm_cache_type[14];

				#else /* !_KERNEL */

				static __inline void
				breakpoint(void)
				{

				/*
				* This matches the instruction used by GDB for software
				* breakpoints.
				*/
				__asm("udf 0xfdee");
				}

	#endif /* _KERNEL */			#endif /* _KERNEL */
	#endif /* _MACHINE_CPUFUNC_H_ */			#endif /* _MACHINE_CPUFUNC_H_ */

	/* End of cpufunc.h */			/* End of cpufunc.h */
				andrewUnsubmitted Not Done Inline Actions What instruction is this? You might also be able to use the `.inst` directive here. andrew: What instruction is this? You might also be able to use the `.inst` directive here.
				jhbAuthorUnsubmitted Not Done Inline Actions This matches GDB5_BREAKPOINT from sys/arm/include/trap.h and it is what GDB uses as the default breakpoint instructions for non-thumb arm: https://github.com/bsdjhb/gdb/blob/master/gdb/arm-tdep.c#L7761 The in-kernel breakpoint() uses .word with the value of KERNEL_BREAKPOINT and I just used that as my template. jhb: This matches GDB5_BREAKPOINT from sys/arm/include/trap.h and it is what GDB uses as the default…
				andrewUnsubmitted Not Done Inline Actions It seems to be `udf 0xfdee`. `udf` is an instruction that raises the undefined instruction exception. andrew: It seems to be `udf 0xfdee`. `udf` is an instruction that raises the undefined instruction…
				emasteUnsubmitted Not Done Inline Actions Perhaps a comment with that reference? emaste: Perhaps a comment with that reference?