+/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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;
+}
projects / binutils-gdb.git / blobdiff