diff options
Diffstat (limited to 'usr.bin/pmdb/arch/i386/i386.c')
| -rw-r--r-- | usr.bin/pmdb/arch/i386/i386.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/usr.bin/pmdb/arch/i386/i386.c b/usr.bin/pmdb/arch/i386/i386.c new file mode 100644 index 00000000000..2612ef63568 --- /dev/null +++ b/usr.bin/pmdb/arch/i386/i386.c @@ -0,0 +1,91 @@ +/* $PMDB: i386.c,v 1.5 2002/02/21 01:54:44 art Exp $ */ +/* + * Copyright (c) 2002 Federico Schwindt <fgsch@openbsd.org> + * 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. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``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. + */ + +#include <sys/param.h> +#include <sys/ptrace.h> +#include <machine/reg.h> +#include <machine/frame.h> +#include "pmdb.h" + +/* + * No frame for x86? + */ +struct frame { + int fp; + int pc; +}; + +static const char *md_reg_names[] = { + "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi", "%eip", + "%eflags", "%cs", "%ss", "%ds", "%es", "%fs", "%gs" +}; + +struct md_def md_def = { md_reg_names, 16, 8 }; + +void +md_def_init(void) +{ + /* no need to do anything */ +} + +int +md_getframe(struct pstate *ps, int frame, struct md_frame *fram) +{ + struct frame fr; + struct reg r; + int count; + + if (ptrace(PT_GETREGS, ps->ps_pid, (caddr_t)&r, 0) != 0) + return (-1); + + fr.fp = r.r_ebp; + fr.pc = r.r_eip; + for (count = 0; count < frame; count++) { + if (read_from_pid(ps->ps_pid, fr.fp, &fr, sizeof(fr)) < 0) + return (-1); + + if (fr.pc < 0x1000) + return (-1); + } + + fram->pc = fr.pc; + fram->fp = fr.fp; + + return 0; +} + +int +md_getregs(struct pstate *ps, reg *regs) +{ + struct reg r; + + if (ptrace(PT_GETREGS, ps->ps_pid, (caddr_t)&r, 0) != 0) + return -1; + + memcpy(regs, &r, sizeof(r)); + + return 0; +} |