From owner-svn-src-head@freebsd.org Thu Nov 8 20:48:46 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1EF861105524; Thu, 8 Nov 2018 20:48:46 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 764C76C039; Thu, 8 Nov 2018 20:48:45 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 3E2DF1C97; Thu, 8 Nov 2018 20:48:45 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wA8KmjJk054479; Thu, 8 Nov 2018 20:48:45 GMT (envelope-from jhibbits@FreeBSD.org) Received: (from jhibbits@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wA8KmjRd054478; Thu, 8 Nov 2018 20:48:45 GMT (envelope-from jhibbits@FreeBSD.org) Message-Id: <201811082048.wA8KmjRd054478@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhibbits set sender to jhibbits@FreeBSD.org using -f From: Justin Hibbits Date: Thu, 8 Nov 2018 20:48:45 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340262 - head/sys/powerpc/powerpc X-SVN-Group: head X-SVN-Commit-Author: jhibbits X-SVN-Commit-Paths: head/sys/powerpc/powerpc X-SVN-Commit-Revision: 340262 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 764C76C039 X-Spamd-Result: default: False [-103.07 / 200.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; ALLOW_DOMAIN_WHITELIST(-100.00)[FreeBSD.org]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; HAS_XAW(0.00)[]; R_SPF_SOFTFAIL(0.00)[~all]; DMARC_NA(0.00)[FreeBSD.org]; RCVD_COUNT_THREE(0.00)[4]; MX_GOOD(-0.01)[cached: mx1.FreeBSD.org]; NEURAL_HAM_SHORT(-0.96)[-0.957,0]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; RCVD_TLS_LAST(0.00)[] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Nov 2018 20:48:46 -0000 Author: jhibbits Date: Thu Nov 8 20:48:44 2018 New Revision: 340262 URL: https://svnweb.freebsd.org/changeset/base/340262 Log: powerpc64: Fix "show spr" command on ELFv2 kernels Summary: When compiling for ELFv2, it is necessary to adjust the offset to get_spr and factor in the function prologue to ensure the correct instruction is being edited. Test Plan: Before: ``` db> show spr 110 KDB: reentering KDB: stack backtrace: 0xc008000020fb96e0: at 0xc000000002bb2e34 = kdb_backtrace+0x68 0xc008000020fb97f0: at 0xc000000002bb3798 = kdb_reenter+0x54 0xc008000020fb9860: at 0xc000000002f87090 = trap+0x4e4 0xc008000020fb9990: at 0xc000000002f78a60 = powerpc_interrupt+0x110 0xc008000020fb9a20: kernel trap 0xe40 by 0xc000000002401978 = get_spr+0x8: srr1=0x9000000000001032 r1=0xc008000020fb9cd0 cr=0x80009438 xer=0x20040000 ctr=0xc000000002f7b40c r2=0xc0000000037fd000 saved LR(0xfffffffffffffffb) is invalid. ``` After: ``` db> show spr 110 SPR 272(110): c000000003cae900 ``` Submitted by: git_bdragon.rtk0.net Differential Revision: https://reviews.freebsd.org/D17813 Modified: head/sys/powerpc/powerpc/machdep.c Modified: head/sys/powerpc/powerpc/machdep.c ============================================================================== --- head/sys/powerpc/powerpc/machdep.c Thu Nov 8 20:31:12 2018 (r340261) +++ head/sys/powerpc/powerpc/machdep.c Thu Nov 8 20:48:44 2018 (r340262) @@ -530,6 +530,10 @@ DB_SHOW_COMMAND(spr, db_show_spr) saved_sprno = sprno = (intptr_t) addr; sprno = ((sprno & 0x3e0) >> 5) | ((sprno & 0x1f) << 5); p = (uint32_t *)(void *)&get_spr; +#if defined(_CALL_ELF) && _CALL_ELF == 2 + /* Account for ELFv2 function prologue. */ + p += 2; +#endif *p = (*p & ~0x001ff800) | (sprno << 11); __syncicache(get_spr, cacheline_size); spr = get_spr(sprno);