45aad14740
Summary: There is often a need at the debugger to print arbitrary special purpose registers (SPRs) on PowerPC. Using a rewritable asm stub, print any SPR provided on the command line. Note, as there is no checking in this, attempting to print a nonexistent SPR may cause a Program exception (illegal instruction, or boundedly undefined). Note also that this relies on the kernel text pages being writable. If in the future this is made not the case, this will need to be reworked. Test Plan: Printing the Processor Version Register (PVR, SPR 287): db> show spr 11f SPR 287(11f): 80240012 Differential Revision: https://reviews.freebsd.org/D7403
16 lines
249 B
ArmAsm
16 lines
249 B
ArmAsm
/* $FreeBSD$ */
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#ifdef __powerpc64__
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#include <powerpc/aim/locore64.S>
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#else
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#include <powerpc/aim/locore32.S>
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#endif
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/*
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* XXX: This should be moved to a shared AIM/booke asm file, if one ever is
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* created.
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*/
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ENTRY(get_spr)
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mfspr %r3, 0
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blr
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