Date: Wed, 29 Feb 2012 02:35:03 GMT From: Oleksandr Tymoshenko <gonzo@FreeBSD.org> To: Perforce Change Reviews <perforce@FreeBSD.org> Subject: PERFORCE change 207064 for review Message-ID: <201202290235.q1T2Z3rP048843@skunkworks.freebsd.org>
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http://p4web.freebsd.org/@@207064?ac=10 Change 207064 by gonzo@gonzo_thinkpad on 2012/02/29 02:34:41 Implement getstack function Affected files ... .. //depot/projects/dtrace-mips/sys/cddl/dev/dtrace/mips/dtrace_isa.c#3 edit Differences ... ==== //depot/projects/dtrace-mips/sys/cddl/dev/dtrace/mips/dtrace_isa.c#3 (text+ko) ==== @@ -60,7 +60,49 @@ dtrace_getpcstack(pc_t *pcstack, int pcstack_limit, int aframes, uint32_t *intrpc) { - printf("IMPLEMENT ME: %s\n", __func__); + int depth = 0; + vm_offset_t callpc; + pc_t caller = (pc_t) solaris_cpu[curcpu].cpu_dtrace_caller; + register_t sp, ra, pc; + + if (intrpc != 0) + pcstack[depth++] = (pc_t) intrpc; + + aframes++; + + sp = (register_t)(intptr_t)__builtin_frame_address(0); + ra = (register_t)(intptr_t)__builtin_return_address(0); + + __asm __volatile( + "jal 99f\n" + "nop\n" + "99:\n" + "move %0, $31\n" /* get ra */ + "move $31, %1\n" /* restore ra */ + : "=r" (pc) + : "r" (ra)); + + while (depth < pcstack_limit) { + + callpc = pc; + + if (aframes > 0) { + aframes--; + if ((aframes == 0) && (caller != 0)) { + pcstack[depth++] = caller; + } + } + else { + pcstack[depth++] = callpc; + } + + if (next_frame(&pc, &sp, NULL, NULL) < 0) + break; + } + + for (; depth < pcstack_limit; depth++) { + pcstack[depth] = 0; + } } void
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