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2001-12-20 Elena Zannoni <ezannoni@redhat.com>

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* ppc-linux-nat.c (ppc_ptrace_cannot_fetch_store_register):
	New function.
	(fetch_register): New function.
	(fetch_ppc_registers): New function.
	(fetch_inferior_registers): New function.
	(store_register): New function.
	(store_ppc_registers): New function.
	(store_inferior_registers): New function.
	(ppc_register_u_addr): Eliminate ustart parameter and its
	uses. Make static.
	(PT_READ_U, PT_WRITE_U, PTRACE_XFER_TYPE): Define if needed.
	Include sys/ptrace.h.

	* config/powerpc/nm-linux.h (FETCH_INFERIOR_REGISTERS): Define.
	(U_REGS_OFFSET, REGISTER_U_ADDR): Delete.

	* config/powerpc/linux.mh (NATDEPFILES): Delete core-aout.o.
This commit is contained in:
Elena Zannoni 2001-12-20 23:31:27 +00:00
parent 2a18e3d9a9
commit 45229ea46c
4 changed files with 168 additions and 18 deletions
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20
gdb/ChangeLog
View File

@ -1,3 +1,23 @@
2001-12-20 Elena Zannoni <ezannoni@redhat.com>
* ppc-linux-nat.c (ppc_ptrace_cannot_fetch_store_register):
New function.
(fetch_register): New function.
(fetch_ppc_registers): New function.
(fetch_inferior_registers): New function.
(store_register): New function.
(store_ppc_registers): New function.
(store_inferior_registers): New function.
(ppc_register_u_addr): Eliminate ustart parameter and its
uses. Make static.
(PT_READ_U, PT_WRITE_U, PTRACE_XFER_TYPE): Define if needed.
Include sys/ptrace.h.
* config/powerpc/nm-linux.h (FETCH_INFERIOR_REGISTERS): Define.
(U_REGS_OFFSET, REGISTER_U_ADDR): Delete.
* config/powerpc/linux.mh (NATDEPFILES): Delete core-aout.o.
2001-12-20 Elena Zannoni <ezannoni@redhat.com>
* rs6000-nat.c (fetch_register): Don't error out unless the

2
gdb/config/powerpc/linux.mh
View File

@ -6,7 +6,7 @@ XM_CLIBS=
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \
core-aout.o core-regset.o ppc-linux-nat.o proc-service.o thread-db.o lin-lwp.o
core-regset.o ppc-linux-nat.o proc-service.o thread-db.o lin-lwp.o
LOADLIBES = -ldl -rdynamic

6
gdb/config/powerpc/nm-linux.h
View File

@ -28,10 +28,6 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#define KERNEL_U_SIZE kernel_u_size()
extern int kernel_u_size (void);
#define U_REGS_OFFSET 0
extern int ppc_register_u_addr (int, int);
#define REGISTER_U_ADDR(addr, blockend, regno) \
(addr) = ppc_register_u_addr ((blockend),(regno));
#define FETCH_INFERIOR_REGISTERS
#endif /* #ifndef NM_LINUX_H */

158
gdb/ppc-linux-nat.c
View File

@ -32,11 +32,24 @@
#include <sys/wait.h>
#include <fcntl.h>
#include <sys/procfs.h>
#include <sys/ptrace.h>
/* Prototypes for supply_gregset etc. */
#include "gregset.h"
#include "ppc-tdep.h"
#ifndef PT_READ_U
#define PT_READ_U PTRACE_PEEKUSR
#endif
#ifndef PT_WRITE_U
#define PT_WRITE_U PTRACE_POKEUSR
#endif
/* Default the type of the ptrace transfer to int. */
#ifndef PTRACE_XFER_TYPE
#define PTRACE_XFER_TYPE int
#endif
int
kernel_u_size (void)
{
@ -56,39 +69,161 @@ PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 +
PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ */
/* *INDENT_ON * */
int
ppc_register_u_addr (int ustart, int regno)
static int
ppc_register_u_addr (int regno)
{
int u_addr = -1;
/* General purpose registers occupy 1 slot each in the buffer */
if (regno >= gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum
&& regno <= gdbarch_tdep (current_gdbarch)->ppc_gplast_regnum )
u_addr = (ustart + (PT_R0 + regno) * 4);
u_addr = ((PT_R0 + regno) * 4);
/* Floating point regs: 2 slots each */
if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)
u_addr = (ustart + (PT_FPR0 + (regno - FP0_REGNUM) * 2) * 4);
u_addr = ((PT_FPR0 + (regno - FP0_REGNUM) * 2) * 4);
/* UISA special purpose registers: 1 slot each */
if (regno == PC_REGNUM)
u_addr = ustart + PT_NIP * 4;
u_addr = PT_NIP * 4;
if (regno == gdbarch_tdep (current_gdbarch)->ppc_lr_regnum)
u_addr = ustart + PT_LNK * 4;
u_addr = PT_LNK * 4;
if (regno == gdbarch_tdep (current_gdbarch)->ppc_cr_regnum)
u_addr = ustart + PT_CCR * 4;
u_addr = PT_CCR * 4;
if (regno == gdbarch_tdep (current_gdbarch)->ppc_xer_regnum)
u_addr = ustart + PT_XER * 4;
u_addr = PT_XER * 4;
if (regno == gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum)
u_addr = ustart + PT_CTR * 4;
u_addr = PT_CTR * 4;
if (regno == gdbarch_tdep (current_gdbarch)->ppc_mq_regnum)
u_addr = ustart + PT_MQ * 4;
u_addr = PT_MQ * 4;
if (regno == gdbarch_tdep (current_gdbarch)->ppc_ps_regnum)
u_addr = ustart + PT_MSR * 4;
u_addr = PT_MSR * 4;
return u_addr;
}
static int
ppc_ptrace_cannot_fetch_store_register (int regno)
{
return (ppc_register_u_addr (regno) == -1);
}
static void
fetch_register (int regno)
{
/* This isn't really an address. But ptrace thinks of it as one. */
char mess[128]; /* For messages */
register int i;
unsigned int offset; /* Offset of registers within the u area. */
char *buf = alloca (MAX_REGISTER_RAW_SIZE);
int tid;
CORE_ADDR regaddr = ppc_register_u_addr (regno);
if (regaddr == -1)
{
memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
supply_register (regno, buf);
return;
}
/* Overload thread id onto process id */
if ((tid = TIDGET (inferior_ptid)) == 0)
tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
*(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid,
(PTRACE_ARG3_TYPE) regaddr, 0);
regaddr += sizeof (PTRACE_XFER_TYPE);
if (errno != 0)
{
sprintf (mess, "reading register %s (#%d)",
REGISTER_NAME (regno), regno);
perror_with_name (mess);
}
}
supply_register (regno, buf);
}
static void
fetch_ppc_registers (void)
{
int i;
int last_register = gdbarch_tdep (current_gdbarch)->ppc_mq_regnum;
for (i = 0; i <= last_register; i++)
fetch_register (i);
}
/* Fetch registers from the child process. Fetch all registers if
regno == -1, otherwise fetch all general registers or all floating
point registers depending upon the value of regno. */
void
fetch_inferior_registers (int regno)
{
if (regno == -1)
fetch_ppc_registers ();
else
fetch_register (regno);
}
/* Store one register. */
static void
store_register (int regno)
{
/* This isn't really an address. But ptrace thinks of it as one. */
CORE_ADDR regaddr = ppc_register_u_addr (regno);
char mess[128]; /* For messages */
register int i;
unsigned int offset; /* Offset of registers within the u area. */
int tid;
char *buf = alloca (MAX_REGISTER_RAW_SIZE);
if (regaddr == -1)
{
return;
}
/* Overload thread id onto process id */
if ((tid = TIDGET (inferior_ptid)) == 0)
tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
regcache_collect (regno, buf);
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr,
*(PTRACE_XFER_TYPE *) & buf[i]);
regaddr += sizeof (PTRACE_XFER_TYPE);
if (errno != 0)
{
sprintf (mess, "writing register %s (#%d)",
REGISTER_NAME (regno), regno);
perror_with_name (mess);
}
}
}
static void
store_ppc_registers (void)
{
int i;
int last_register = gdbarch_tdep (current_gdbarch)->ppc_mq_regnum;
for (i = 0; i <= last_register; i++)
store_register (i);
}
void
store_inferior_registers (int regno)
{
if (regno >= 0)
store_register (regno);
else
store_ppc_registers ();
}
void
supply_gregset (gdb_gregset_t *gregsetp)
{
@ -111,7 +246,6 @@ supply_gregset (gdb_gregset_t *gregsetp)
(char *) (regp + PT_MQ));
supply_register (gdbarch_tdep (current_gdbarch)->ppc_ps_regnum,
(char *) (regp + PT_MSR));
}
void