diff options
author | marcel <marcel@FreeBSD.org> | 2004-07-10 17:47:22 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 2004-07-10 17:47:22 +0000 |
commit | 6e0dcca8a9676834e327681abedbeca81a0907f2 (patch) | |
tree | 787a3c6916bdd82a49a07a8288119d62dd89055b /sys/amd64 | |
parent | 1ff719505763720315217ca8b7eb6d6f03c49222 (diff) | |
download | FreeBSD-src-6e0dcca8a9676834e327681abedbeca81a0907f2.zip FreeBSD-src-6e0dcca8a9676834e327681abedbeca81a0907f2.tar.gz |
Introduce the GDB debugger backend for the new KDB framework. The
backend improves over the old GDB support in the following ways:
o Unified implementation with minimal MD code.
o A simple interface for devices to register themselves as debug
ports, ala consoles.
o Compression by using run-length encoding.
o Implements GDB threading support.
Diffstat (limited to 'sys/amd64')
-rw-r--r-- | sys/amd64/amd64/gdb_machdep.c | 84 | ||||
-rw-r--r-- | sys/amd64/include/gdb_machdep.h | 57 |
2 files changed, 141 insertions, 0 deletions
diff --git a/sys/amd64/amd64/gdb_machdep.c b/sys/amd64/amd64/gdb_machdep.c new file mode 100644 index 0000000..820824b --- /dev/null +++ b/sys/amd64/amd64/gdb_machdep.c @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2004 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kdb.h> +#include <sys/kernel.h> +#include <sys/proc.h> +#include <sys/signal.h> + +#include <machine/frame.h> +#include <machine/gdb_machdep.h> +#include <machine/psl.h> +#include <machine/reg.h> +#include <machine/trap.h> + +#include <gdb/gdb.h> + +void * +gdb_cpu_getreg(int regnum, size_t *regsz) +{ + struct trapframe *tf = kdb_frame; + + *regsz = gdb_cpu_regsz(regnum); + switch (regnum) { + case 0: return (&tf->tf_rax); + case 1: return (&tf->tf_rbx); + case 2: return (&tf->tf_rcx); + case 3: return (&tf->tf_rdx); + case 4: return (&tf->tf_rsi); + case 5: return (&tf->tf_rdi); + case 6: return (&tf->tf_rbp); + case 7: return (&tf->tf_rsp); + case 8: return (&tf->tf_r8); + case 9: return (&tf->tf_r9); + case 10: return (&tf->tf_r10); + case 11: return (&tf->tf_r11); + case 12: return (&tf->tf_r12); + case 13: return (&tf->tf_r13); + case 14: return (&tf->tf_r14); + case 15: return (&tf->tf_r15); + case 16: return (&tf->tf_rip); + case 17: return (&tf->tf_rflags); + case 18: return (&tf->tf_cs); + case 19: return (&tf->tf_ss); + } + return (NULL); +} + +void +gdb_cpu_setreg(int regnum, register_t val) +{ + struct trapframe *tf = kdb_frame; + + switch (regnum) { + case GDB_REG_PC: tf->tf_rip = val; break; + } +} diff --git a/sys/amd64/include/gdb_machdep.h b/sys/amd64/include/gdb_machdep.h new file mode 100644 index 0000000..458f2f6 --- /dev/null +++ b/sys/amd64/include/gdb_machdep.h @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2004 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_GDB_MACHDEP_H_ +#define _MACHINE_GDB_MACHDEP_H_ + +#define GDB_BUFSZ 500 +#define GDB_NREGS 56 +#define GDB_REG_PC 18 + +static __inline size_t +gdb_cpu_regsz(int regnum) +{ + return ((regnum > 16 && regnum < 24) ? 4 : 8); +} + +static __inline int +gdb_cpu_signal(int type, int code __unused) +{ + return (type); +} + +static __inline int +gdb_cpu_query(void) +{ + return (0); +} + +void *gdb_cpu_getreg(int, size_t *); +void gdb_cpu_setreg(int, register_t); + +#endif /* !_MACHINE_GDB_MACHDEP_H_ */ |