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binutils-gdb/gdb/cxux-nat.c

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/* Native support for Motorola 88k running Harris CX/UX.
Copyright 1988, 1990, 1991, 1992, 1993, 1994 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 "frame.h"
#include "inferior.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include "gdbcore.h"
#include <sys/user.h>
#include "bfd.h"
#include "symfile.h"
#include "objfiles.h"
#include "symtab.h"
#ifndef USER /* added to support BCS ptrace_user */
#define USER ptrace_user
#endif
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/stat.h>
#include "symtab.h"
#include "setjmp.h"
#include "value.h"
#include <sys/ptrace.h>
/* CX/UX provides them already, but as word offsets instead of char offsets */
#define SXIP_OFFSET (PT_SXIP * 4)
#define SNIP_OFFSET (PT_SNIP * 4)
#define SFIP_OFFSET (PT_SFIP * 4)
#define PSR_OFFSET (PT_PSR * sizeof(int))
#define FPSR_OFFSET (PT_FPSR * sizeof(int))
#define FPCR_OFFSET (PT_FPCR * sizeof(int))
#define XREGADDR(r) (((char *)&u.pt_x0-(char *)&u) + \
((r)-X0_REGNUM)*sizeof(X_REGISTER_RAW_TYPE))
extern int have_symbol_file_p();
extern jmp_buf stack_jmp;
extern int errno;
extern char registers[REGISTER_BYTES];
void
fetch_inferior_registers (regno)
int regno; /* Original value discarded */
{
register unsigned int regaddr;
char buf[MAX_REGISTER_RAW_SIZE];
register int i;
struct USER u;
unsigned int offset;
offset = (char *) &u.pt_r0 - (char *) &u;
regaddr = offset; /* byte offset to r0;*/
/* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
for (regno = 0; regno < PC_REGNUM; regno++)
{
/*regaddr = register_addr (regno, offset);*/
/* 88k enhancement */
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
{
*(int *) &buf[i] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) regaddr, 0);
regaddr += sizeof (int);
}
supply_register (regno, buf);
}
/* now load up registers 32-37; special pc registers */
*(int *) &buf[0] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) PSR_OFFSET,0);
supply_register (PSR_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) FPSR_OFFSET,0);
supply_register (FPSR_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) FPCR_OFFSET,0);
supply_register (FPCR_REGNUM, buf);
*(int *) &buf[0] = ptrace (3,inferior_pid,
(PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
supply_register (SXIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
supply_register (SNIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
supply_register (SFIP_REGNUM, buf);
if (target_is_m88110)
{
for (regaddr = XREGADDR(X0_REGNUM), regno = X0_REGNUM;
regno < NUM_REGS;
regno++, regaddr += 16)
{
X_REGISTER_RAW_TYPE xval;
*(int *) &xval.w1 = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) regaddr, 0);
*(int *) &xval.w2 = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) (regaddr+4), 0);
*(int *) &xval.w3 = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) (regaddr+8), 0);
*(int *) &xval.w4 = ptrace (3, inferior_pid,
(PTRACE_ARG3_TYPE) (regaddr+12), 0);
supply_register(regno, (void *)&xval);
}
}
}
/* Store our register values back into the inferior.
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
void
store_inferior_registers (regno)
int regno;
{
register unsigned int regaddr;
char buf[80];
struct USER u;
unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
regaddr = offset;
/* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
svr3 doesn't run on an 88110, or the kernel isolates the different (not
completely sure this is true, but seems to be. */
if (regno >= 0)
{
/* regaddr = register_addr (regno, offset); */
if (regno < PC_REGNUM)
{
regaddr = offset + regno * sizeof (int);
errno = 0;
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
if (errno != 0)
{
sprintf (buf, "writing register number %d", regno);
perror_with_name (buf);
}
}
else if (regno == PSR_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) PSR_OFFSET, read_register(regno));
else if (regno == FPSR_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register(regno));
else if (regno == FPCR_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register(regno));
else if (regno == SXIP_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
else if (regno == SNIP_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
else if (regno == SFIP_REGNUM)
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
else if (target_is_m88110 && regno < NUM_REGS)
{
X_REGISTER_RAW_TYPE xval;
read_register_bytes(REGISTER_BYTE(regno), (char *)&xval,
sizeof(X_REGISTER_RAW_TYPE));
regaddr = XREGADDR(regno);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+4, xval.w2);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+8, xval.w3);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+12, xval.w4);
}
else
printf_unfiltered ("Bad register number for store_inferior routine\n");
}
else
{
for (regno = 0; regno < PC_REGNUM; regno++)
{
/* regaddr = register_addr (regno, offset); */
errno = 0;
regaddr = offset + regno * sizeof (int);
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
if (errno != 0)
{
sprintf (buf, "writing register number %d", regno);
perror_with_name (buf);
}
}
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) PSR_OFFSET, read_register(regno));
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) FPSR_OFFSET,read_register(regno));
ptrace (6, inferior_pid,
(PTRACE_ARG3_TYPE) FPCR_OFFSET,read_register(regno));
ptrace (6,inferior_pid,
(PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
ptrace (6,inferior_pid,
(PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
ptrace (6,inferior_pid,
(PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
if (target_is_m88110)
{
for (regno = X0_REGNUM; regno < NUM_REGS; regno++)
{
X_REGISTER_RAW_TYPE xval;
read_register_bytes(REGISTER_BYTE(regno), (char *)&xval,
sizeof(X_REGISTER_RAW_TYPE));
regaddr = XREGADDR(regno);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+4), xval.w2);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+8), xval.w3);
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+12), xval.w4);
}
}
}
}
/* blockend is the address of the end of the user structure */
m88k_register_u_addr (blockend, regnum)
int blockend, regnum;
{
struct USER u;
int ustart = blockend - sizeof (struct USER);
if (regnum < PSR_REGNUM)
return (ustart + ((int) &u.pt_r0 - (int) &u) +
REGISTER_SIZE * regnum);
else if (regnum == PSR_REGNUM)
return (ustart + ((int) &u.pt_psr) - (int) &u);
else if (regnum == FPSR_REGNUM)
return (ustart + ((int) &u.pt_fpsr) - (int) &u);
else if (regnum == FPCR_REGNUM)
return (ustart + ((int) &u.pt_fpcr) - (int) &u);
else if (regnum == SXIP_REGNUM)
return (ustart + SXIP_OFFSET);
else if (regnum == SNIP_REGNUM)
return (ustart + SNIP_OFFSET);
else if (regnum == SFIP_REGNUM)
return (ustart + SFIP_OFFSET);
else if (target_is_m88110)
return (ustart + ((int) &u.pt_x0 - (int) &u) + /* Must be X register */
sizeof(u.pt_x0) * (regnum - X0_REGNUM));
else
return (blockend + REGISTER_SIZE * regnum);
}
#ifdef USE_PROC_FS
#include <sys/procfs.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;
{
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
for (regi=0; regi <= SP_REGNUM; regi++)
supply_register (regi, (char *) (regp + regi));
supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
}
void
fill_gregset (gregsetp, regno)
gregset_t *gregsetp;
int regno;
{
int regi;
register greg_t *regp = (greg_t *) gregsetp;
extern char registers[];
for (regi = 0 ; regi <= R_R31 ; regi++)
if ((regno == -1) || (regno == regi))
*(regp + regi) = *(int *) &registers[REGISTER_BYTE(regi)];
if ((regno == -1) || (regno == SXIP_REGNUM))
*(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE(SXIP_REGNUM)];
if ((regno == -1) || (regno == SNIP_REGNUM))
*(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE(SNIP_REGNUM)];
if ((regno == -1) || (regno == SFIP_REGNUM))
*(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE(SFIP_REGNUM)];
if ((regno == -1) || (regno == PSR_REGNUM))
*(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE(PSR_REGNUM)];
if ((regno == -1) || (regno == FPSR_REGNUM))
*(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE(FPSR_REGNUM)];
if ((regno == -1) || (regno == FPCR_REGNUM))
*(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE(FPCR_REGNUM)];
}
#endif /* USE_PROC_FS */
/* This support adds the equivalent of adb's % command. When
the `add-shared-symbol-files' command is given, this routine scans
the dynamic linker's link map and reads the minimal symbols
from each shared object file listed in the map. */
struct link_map {
unsigned long l_addr; /* address at which object is mapped */
char *l_name; /* full name of loaded object */
void *l_ld; /* dynamic structure of object */
struct link_map *l_next; /* next link object */
struct link_map *l_prev; /* previous link object */
};
#define LINKS_MAP_POINTER "_ld_tail"
#define LIBC_FILE "/usr/lib/libc.so.1"
#define SHARED_OFFSET 0xf0001000
#ifndef PATH_MAX
#define PATH_MAX 1023 /* maximum size of path name on OS */
#endif
void
add_shared_symbol_files ()
{
void *desc;
struct link_map *ld_map, *lm, lms;
struct minimal_symbol *minsym;
struct objfile *objfile;
char *path_name;
if (! inferior_pid)
{
warning ("The program has not yet been started.");
return;
}
objfile = symbol_file_add (LIBC_FILE, 0, 0, 0, 0, 1);
minsym = lookup_minimal_symbol (LINKS_MAP_POINTER, objfile);
ld_map = (struct link_map *)
read_memory_integer (((int)SYMBOL_VALUE_ADDRESS(minsym) + SHARED_OFFSET), 4);
lm = ld_map;
while (lm)
{
int local_errno = 0;
read_memory ((CORE_ADDR)lm, (char*)&lms, sizeof (struct link_map));
if (lms.l_name)
{
if (target_read_string ((CORE_ADDR)lms.l_name, &path_name,
PATH_MAX, &local_errno))
{
symbol_file_add (path_name, 1, lms.l_addr, 0, 0, 0);
free(path_name);
}
}
/* traverse links in reverse order so that we get the
the symbols the user actually gets. */
lm = lms.l_prev;
}
/* Getting new symbols may change our opinion about what is
frameless. */
reinit_frame_cache ();
}
#if defined(_ES_MP)
#include <sys/regset.h>
unsigned int
m88k_harris_core_register_addr (regno, reg_ptr)
int regno, reg_ptr;
{
unsigned int word_offset;
switch (regno)
{
case PSR_REGNUM:
word_offset = R_EPSR;
break;
case FPSR_REGNUM:
word_offset = R_FPSR;
break;
case FPCR_REGNUM:
word_offset = R_FPCR;
break;
case SXIP_REGNUM:
word_offset = R_EXIP;
break;
case SNIP_REGNUM:
word_offset = R_ENIP;
break;
case SFIP_REGNUM:
word_offset = R_EFIP;
break;
default:
if (regno <= FP_REGNUM)
word_offset = regno;
else
word_offset = ((regno - X0_REGNUM) * 4);
}
return (word_offset * 4);
}
#endif /* _ES_MP */
void
_initialize_m88k_nat()
{
#ifdef _ES_MP
/* Enable 88110 support, as we don't support the 88100 under ES/MP. */
target_is_m88110 = 1;
#elif defined(_CX_UX)
/* Determine whether we're running on an 88100 or an 88110. */
target_is_m88110 = (sinfo(SYSMACHINE,0) == SYS5800);
#endif /* _CX_UX */
}
#ifdef _ES_MP
/* 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;
{
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
for (regi = 0 ; regi < R_R31 ; regi++)
{
supply_register (regi, (char *) (regp + regi));
}
supply_register (PSR_REGNUM, (char *) (regp + R_EPSR));
supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
supply_register (SXIP_REGNUM, (char *) (regp + R_EXIP));
supply_register (SNIP_REGNUM, (char *) (regp + R_ENIP));
supply_register (SFIP_REGNUM, (char *) (regp + R_EFIP));
}
/* 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;
{
register int regi;
char *from;
for (regi = FP0_REGNUM ; regi <= FPLAST_REGNUM ; regi++)
{
from = (char *) &((*fpregsetp)[regi-FP0_REGNUM]);
supply_register (regi, from);
}
}
#endif /* _ES_MP */
#ifdef _CX_UX
#include <sys/regset.h>
unsigned int m88k_harris_core_register_addr(int regno, int reg_ptr)
{
unsigned int word_offset;
switch (regno) {
case PSR_REGNUM : word_offset = R_PSR; break;
case FPSR_REGNUM : word_offset = R_FPSR; break;
case FPCR_REGNUM : word_offset = R_FPCR; break;
case SXIP_REGNUM : word_offset = R_XIP; break;
case SNIP_REGNUM : word_offset = R_NIP; break;
case SFIP_REGNUM : word_offset = R_FIP; break;
default :
if (regno <= FP_REGNUM)
word_offset = regno;
else
word_offset = ((regno - X0_REGNUM) * 4) + R_X0;
}
return (word_offset * 4);
}
#endif /* _CX_UX */
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