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darling-gdb/gdb/cxux-nat.c
Kevin Buettner 39f770628a Phase 1 of the ptid_t changes.
2001-05-04 04:15:33 +00:00

538 lines
16 KiB
C
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/* Native support for Motorola 88k running Harris CX/UX.
Copyright 1988, 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000,
2001 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 "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"
#include "regcache.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 "gdb_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;
void
fetch_inferior_registers (int regno)
{
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, PIDGET (inferior_ptid), (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, PIDGET (inferior_ptid),
(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, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) PSR_OFFSET, 0);
supply_register (PSR_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) FPSR_OFFSET, 0);
supply_register (FPSR_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) FPCR_OFFSET, 0);
supply_register (FPCR_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) SXIP_OFFSET, 0);
supply_register (SXIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) SNIP_OFFSET, 0);
supply_register (SNIP_REGNUM, buf);
*(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
(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, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) regaddr, 0);
*(int *) &xval.w2 = ptrace (3, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) (regaddr + 4), 0);
*(int *) &xval.w3 = ptrace (3, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) (regaddr + 8), 0);
*(int *) &xval.w4 = ptrace (3, PIDGET (inferior_ptid),
(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 (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, PIDGET (inferior_ptid),
(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, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) PSR_OFFSET, read_register (regno));
else if (regno == FPSR_REGNUM)
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));
else if (regno == FPCR_REGNUM)
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));
else if (regno == SXIP_REGNUM)
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
else if (regno == SNIP_REGNUM)
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
else if (regno == SFIP_REGNUM)
ptrace (6, PIDGET (inferior_ptid),
(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, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr, xval.w1);
ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr + 4, xval.w2);
ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr + 8, xval.w3);
ptrace (6, PIDGET (inferior_ptid), (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, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
if (errno != 0)
{
sprintf (buf, "writing register number %d", regno);
perror_with_name (buf);
}
}
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) PSR_OFFSET, read_register (regno));
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
ptrace (6, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
ptrace (6, PIDGET (inferior_ptid),
(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, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr, xval.w1);
ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) (regaddr + 4), xval.w2);
ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) (regaddr + 8), xval.w3);
ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) (regaddr + 12), xval.w4);
}
}
}
}
/* blockend is the address of the end of the user structure */
m88k_register_u_addr (int blockend, int 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>
/* Prototypes for supply_gregset etc. */
#include "gregset.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 (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 (gregset_t *gregsetp, int regno)
{
int regi;
register greg_t *regp = (greg_t *) gregsetp;
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)
{
void *desc;
struct link_map *ld_map, *lm, lms;
struct minimal_symbol *minsym;
struct objfile *objfile;
char *path_name;
if (ptid_equal (inferior_ptid, null_ptid))
{
warning ("The program has not yet been started.");
return;
}
objfile = symbol_file_add (LIBC_FILE, 0, NULL, 0, OBJF_READNOW);
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))
{
struct section_addr_info section_addrs;
memset (&section_addrs, 0, sizeof (section_addrs));
section_addrs.other[0].addr = lms.l_addr;
section_addrs.other[0].name = ".text";
symbol_file_add (path_name, 1, &section_addrs, 0, 0);
xfree (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 (int regno, int 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 (void)
{
#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 (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 (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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