bcc5241c43
specified register, but a pointer to the in-memory representation of that value. The reason for this is twofold: 1. Not all registers can be represented by a register_t. In particular FP registers fall in that category. Passing the new register value by reference instead of by value makes this point moot. 2. When we receive a G or P packet, both are for writing a register, the packet will have the register value in target-byte order and in the memory representation (modulo the fact that bytes are sent as 2 printable hexadecimal numbers of course). We only need to decode the packet to have a pointer to the register value. This change fixes the bug of extracting the register value of the P packet as a hexadecimal number instead of as a bit array. The quick (and dirty) fix to bswap the register value in gdb_cpu_setreg() as it has been added on i386 and amd64 can therefore be removed and has in fact been that. Tested on: alpha, amd64, i386, ia64, sparc64
94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
/*
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* Copyright (c) 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kdb.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/signal.h>
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#include <machine/frame.h>
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#include <machine/gdb_machdep.h>
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#include <machine/pcb.h>
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#include <machine/psl.h>
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#include <machine/reg.h>
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#include <machine/trap.h>
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#include <machine/frame.h>
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#include <machine/endian.h>
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#include <gdb/gdb.h>
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void *
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gdb_cpu_getreg(int regnum, size_t *regsz)
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{
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*regsz = gdb_cpu_regsz(regnum);
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if (kdb_thread == curthread) {
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switch (regnum) {
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case 0: return (&kdb_frame->tf_rax);
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case 2: return (&kdb_frame->tf_rcx);
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case 3: return (&kdb_frame->tf_rdx);
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case 4: return (&kdb_frame->tf_rsi);
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case 5: return (&kdb_frame->tf_rdi);
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case 8: return (&kdb_frame->tf_r8);
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case 9: return (&kdb_frame->tf_r9);
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case 10: return (&kdb_frame->tf_r10);
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case 11: return (&kdb_frame->tf_r11);
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case 18: return (&kdb_frame->tf_cs);
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case 19: return (&kdb_frame->tf_ss);
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}
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}
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switch (regnum) {
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case 1: return (&kdb_thrctx->pcb_rbx);
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case 6: return (&kdb_thrctx->pcb_rbp);
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case 7: return (&kdb_thrctx->pcb_rsp);
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case 12: return (&kdb_thrctx->pcb_r12);
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case 13: return (&kdb_thrctx->pcb_r13);
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case 14: return (&kdb_thrctx->pcb_r14);
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case 15: return (&kdb_thrctx->pcb_r15);
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case 16: return (&kdb_thrctx->pcb_rip);
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case 17: return (&kdb_thrctx->pcb_rflags);
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}
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return (NULL);
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}
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void
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gdb_cpu_setreg(int regnum, void *val)
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{
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switch (regnum) {
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case GDB_REG_PC:
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kdb_thrctx->pcb_rip = *(register_t *)val;
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if (kdb_thread == curthread)
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kdb_frame->tf_rip = *(register_t *)val;
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}
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}
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