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/* Native-dependent code for ptx 4.0
Copyright 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.h"
#include <sys/procfs.h>
#include <sys/ptrace.h>
#include <sys/param.h>
#include <fcntl.h>
/* Given a pointer to a general register set in /proc format (gregset_t *),
unpack the register contents and supply them as gdb's idea of the current
register values. */
void
supply_gregset (gregsetp)
gregset_t *gregsetp;
{
supply_register(EAX_REGNUM, (char *)&(*gregsetp)[EAX]);
supply_register(EDX_REGNUM, (char *)&(*gregsetp)[EDX]);
supply_register(ECX_REGNUM, (char *)&(*gregsetp)[ECX]);
supply_register(EBX_REGNUM, (char *)&(*gregsetp)[EBX]);
supply_register(ESI_REGNUM, (char *)&(*gregsetp)[ESI]);
supply_register(EDI_REGNUM, (char *)&(*gregsetp)[EDI]);
supply_register(ESP_REGNUM, (char *)&(*gregsetp)[UESP]);
supply_register(EBP_REGNUM, (char *)&(*gregsetp)[EBP]);
supply_register(EIP_REGNUM, (char *)&(*gregsetp)[EIP]);
supply_register(EFLAGS_REGNUM, (char *)&(*gregsetp)[EFL]);
}
void
fill_gregset (gregsetp, regno)
gregset_t *gregsetp;
int regno;
{
int regi;
extern char registers[];
for (regi = 0 ; regi < NUM_REGS ; regi++)
{
if ((regno == -1) || (regno == regi))
{
(*gregsetp)[regi] = *(greg_t *)®isters[REGISTER_BYTE (regi)];
}
}
}
#if defined (FP0_REGNUM)
/* Given a pointer to a floating point register set in /proc format
(fpregset_t *), unpack the register contents and supply them as gdb's
idea of the current floating point register values. */
void
supply_fpregset (fpregsetp)
fpregset_t *fpregsetp;
{
supply_fpu_registers((struct fpusave *)&fpregsetp->fp_reg_set);
supply_fpa_registers((struct fpasave *)&fpregsetp->f_wregs);
}
/* Given a pointer to a floating point register set in /proc format
(fpregset_t *), update the register specified by REGNO from gdb's idea
of the current floating point register set. If REGNO is -1, update
them all. */
void
fill_fpregset (fpregsetp, regno)
fpregset_t *fpregsetp;
int regno;
{
int regi;
char *to;
char *from;
extern char registers[];
/* FIXME: see m68k-tdep.c for an example, for the m68k. */
}
#endif /* defined (FP0_REGNUM) */
/*
* This doesn't quite do the same thing as the procfs.c version, but give
* it the same name so we don't have to put an ifdef in solib.c.
*/
/* this could use elf_interpreter() from elfread.c */
int
proc_iterate_over_mappings(func)
int (*func) PARAMS ((int, CORE_ADDR));
{
vaddr_t curseg, memptr;
pt_vseg_t pv;
int rv, cmperr;
sec_ptr interp_sec;
char *interp_content;
int interp_fd, funcstat;
unsigned int size;
char buf1[NBPG], buf2[NBPG];
/*
* The following is really vile. We can get the name of the
* shared library from the exec_bfd, and we can get a list of
* each virtual memory segment, but there is no simple way to
* find the mapped segment from the shared library (ala
* procfs's PIOCOPENMEM). As a pretty nasty kludge, we
* compare the virtual memory segment to the contents of the
* .interp file. If they match, we assume that we've got the
* right one.
*/
/*
* TODO: for attach, use XPT_OPENT to get the executable, in
* case we're attached without knowning the executable's
* filename.
*/
#ifdef VERBOSE_DEBUG
printf("proc_iter\n");
#endif
interp_sec = bfd_get_section_by_name(exec_bfd, ".interp");
if (!interp_sec) {
return 0;
}
size = bfd_section_size(exec_bfd, interp_sec);
interp_content = alloca(size);
if (0 == bfd_get_section_contents(exec_bfd, interp_sec,
interp_content, (file_ptr)0, size)) {
return 0;
}
#ifdef VERBOSE_DEBUG
printf("proc_iter: \"%s\"\n", interp_content);
#endif
interp_fd = open(interp_content, O_RDONLY, 0);
if (-1 == interp_fd) {
return 0;
}
curseg = 0;
while (1) {
rv = ptrace(PT_NEXT_VSEG, inferior_pid, &pv, curseg);
#ifdef VERBOSE_DEBUG
printf("PT_NEXT_VSEG: rv %d errno %d\n", rv, errno);
#endif
if (-1 == rv)
break;
if (0 == rv)
break;
#ifdef VERBOSE_DEBUG
printf("pv.pv_start 0x%x pv_size 0x%x pv_prot 0x%x\n",
pv.pv_start, pv.pv_size, pv.pv_prot);
#endif
curseg = pv.pv_start + pv.pv_size;
rv = lseek(interp_fd, 0, SEEK_SET);
if (-1 == rv) {
perror("lseek");
close(interp_fd);
return 0;
}
for (memptr = pv.pv_start; memptr < pv.pv_start + pv.pv_size;
memptr += NBPG) {
#ifdef VERBOSE_DEBUG
printf("memptr 0x%x\n", memptr);
#endif
rv = read(interp_fd, buf1, NBPG);
if (-1 == rv) {
perror("read");
close(interp_fd);
return 0;
}
rv = ptrace(PT_RDATA_PAGE, inferior_pid, buf2,
memptr);
if (-1 == rv) {
perror("ptrace");
close(interp_fd);
return 0;
}
cmperr = memcmp(buf1, buf2, NBPG);
if (cmperr)
break;
}
if (0 == cmperr) {
/* this is it */
funcstat = (*func)(interp_fd, pv.pv_start);
break;
}
}
close(interp_fd);
return 0;
}
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