Le 19/05/2021 à 16:29, Mark Cave-Ayland a écrit : > This patchset implements the m68k "any instruction" tracing mode which is used > by the NetBSD kernel debugger to implement single-stepping. It is based upon > reading through the M68000 PRM and looking at how the ARM target handles both > gdbstub and architectural single-step exceptions. > > With this patchset it becomes possible to single-step the NetBSD kernel using > the in-built kernel debugger: > > Stopped in pid 0.1 (system) at netbsd:cpu_Debugger+0x6: unlk a6 > db> s > Stopped in pid 0.1 (system) at netbsd:cpu_Debugger+0x8: rts > db> > Stopped in pid 0.1 (system) at netbsd:main+0x2c: jsr > kernel_lock_init > [addr:0x1a38f6 ] > db> > Stopped in pid 0.1 (system) at netbsd:kernel_lock_init: linkw a6,#0 > db> > Stopped in pid 0.1 (system) at netbsd:kernel_lock_init+0x4: clrb > kernel_l > ock [addr:0x33f400 ] > db> > Stopped in pid 0.1 (system) at netbsd:kernel_lock_init+0xa: clrb > kernel_l > ock_dodebug [addr:0x35b48c ] > db> > Stopped in pid 0.1 (system) at netbsd:kernel_lock_init+0x10: unlk a6 > db> > Stopped in pid 0.1 (system) at netbsd:kernel_lock_init+0x12: rts > db> c > Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, > [ 1.0000000] 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, > 2015, 2016, 2017, > [ 1.0000000] 2018, 2019, 2020 The NetBSD Foundation, Inc. All rights > reserved. > [ 1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993 > [ 1.0000000] The Regents of the University of California. All rights > reserved. > > [ 1.0000000] NetBSD 9.1 (GENERIC) #0: Sun Oct 18 19:24:30 UTC 2020 > ... etc ... > > > Signed-off-by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk> > > [q800-macos-upstream patchset series: 2] > > Mark Cave-Ayland (4): > target/m68k: introduce is_singlestepping() function > target/m68k: call gen_raise_exception() directly if single-stepping in > gen_jmp_tb() > target/m68k: introduce gen_singlestep_exception() function > target/m68k: implement m68k "any instruction" trace mode > > target/m68k/cpu.h | 8 +++++++ > target/m68k/translate.c | 51 ++++++++++++++++++++++++++++++++++------- > 2 files changed, 51 insertions(+), 8 deletions(-) >
Applied to my m68k-for-6.1 tree. Thanks, Laurent
