Date: Fri, 30 May 2003 20:10:35 -0700 (PDT) From: Juli Mallett <jmallett@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 32147 for review Message-ID: <200305310310.h4V3AZSZ097119@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=32147 Change 32147 by jmallett@jmallett_dalek on 2003/05/30 20:10:08 Set up the auxillary frame for DDB. Affected files ... .. //depot/projects/mips/sys/mips/mips/exception.S#3 edit Differences ... ==== //depot/projects/mips/sys/mips/mips/exception.S#3 (text+ko) ==== @@ -9,6 +9,8 @@ * $FreeBSD$ */ +#include "opt_ddb.h" + #include <machine/asm.h> #include <machine/cpuregs.h> @@ -41,7 +43,18 @@ j exception_save_registers move k1, sp 1: + /* + * A generic exception may result in DDB being invoked. If we + * are using the kernel debugger, then set up is auxillary + * frame, so it has a full one. + */ +#if DDB + jal save_kdbaux + nop +#endif /* DDB */ + + /* * Call trap() with arguments: * trapframe, cause, badvaddr. * @@ -214,3 +227,31 @@ jr k0 nop END(exception_save_registers) + +#if DDB +/* + * Save the kdbaux structure for DDB. + */ +ENTRY(save_kdbaux) + /* + * If we are using the kernel debugger, store registers that + * the compiler normally saves in the place where it expects + * to find them, to form a full frame. + */ + dla k0, kdbaux + sd s0, 0x00(k0) + sd s1, 0x08(k0) + sd s2, 0x10(k0) + sd s3, 0x18(k0) + sd s4, 0x20(k0) + sd s5, 0x28(k0) + sd s6, 0x30(k0) + sd s7, 0x38(k0) + sd sp, 0x40(k0) + sd s8, 0x48(k0) + sd gp, 0x50(k0) + + jr ra + nop +END(save_kdbaux) +#endif /* DDB */
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