/* PPC linux native support.
- Copyright (C) 1988, 1989, 1991, 1992, 1994, 1996 Free Software Foundation, Inc.
+ Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of GDB.
#include "frame.h"
#include "inferior.h"
#include "gdbcore.h"
+#include "regcache.h"
#include <sys/types.h>
#include <sys/param.h>
#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 ()
+kernel_u_size (void)
{
return (sizeof (struct user));
}
-static int regmap[] =
-{PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
- PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15,
- PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23,
- PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31,
- PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14,
- PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30,
- PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46,
- PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62,
- PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ};
-
-int
-ppc_register_u_addr (int ustart, int regnum)
+/* *INDENT-OFF* */
+/* registers layout, as presented by the ptrace interface:
+PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
+PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15,
+PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23,
+PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31,
+PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14,
+PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30,
+PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46,
+PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62,
+PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ */
+/* *INDENT_ON * */
+
+static int
+ppc_register_u_addr (int regno)
+{
+ int u_addr = -1;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ /* General purpose registers occupy 1 slot each in the buffer */
+ if (regno >= tdep->ppc_gp0_regnum && regno <= tdep->ppc_gplast_regnum )
+ u_addr = ((PT_R0 + regno) * 4);
+
+ /* Floating point regs: 2 slots each */
+ if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)
+ u_addr = ((PT_FPR0 + (regno - FP0_REGNUM) * 2) * 4);
+
+ /* UISA special purpose registers: 1 slot each */
+ if (regno == PC_REGNUM)
+ u_addr = PT_NIP * 4;
+ if (regno == tdep->ppc_lr_regnum)
+ u_addr = PT_LNK * 4;
+ if (regno == tdep->ppc_cr_regnum)
+ u_addr = PT_CCR * 4;
+ if (regno == tdep->ppc_xer_regnum)
+ u_addr = PT_XER * 4;
+ if (regno == tdep->ppc_ctr_regnum)
+ u_addr = PT_CTR * 4;
+ if (regno == tdep->ppc_mq_regnum)
+ u_addr = PT_MQ * 4;
+ if (regno == tdep->ppc_ps_regnum)
+ 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)
{
- return (ustart + 4 * regmap[regnum]);
+ /* 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);
+ }
+ }
}
-supply_gregset (gregset_t * gregsetp)
+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)
{
int regi;
- register greg_t *regp = (greg_t *) gregsetp;
+ register elf_greg_t *regp = (elf_greg_t *) gregsetp;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
for (regi = 0; regi < 32; regi++)
supply_register (regi, (char *) (regp + regi));
- for (regi = FIRST_UISA_SP_REGNUM; regi <= LAST_UISA_SP_REGNUM; regi++)
- supply_register (regi, (char *) (regp + regmap[regi]));
+ supply_register (PC_REGNUM, (char *) (regp + PT_NIP));
+ supply_register (tdep->ppc_lr_regnum, (char *) (regp + PT_LNK));
+ supply_register (tdep->ppc_cr_regnum, (char *) (regp + PT_CCR));
+ supply_register (tdep->ppc_xer_regnum, (char *) (regp + PT_XER));
+ supply_register (tdep->ppc_ctr_regnum, (char *) (regp + PT_CTR));
+ supply_register (tdep->ppc_mq_regnum, (char *) (regp + PT_MQ));
+ supply_register (tdep->ppc_ps_regnum, (char *) (regp + PT_MSR));
+}
+
+void
+fill_gregset (gdb_gregset_t *gregsetp, int regno)
+{
+ int regi;
+ elf_greg_t *regp = (elf_greg_t *) gregsetp;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ for (regi = 0; regi < 32; regi++)
+ {
+ if ((regno == -1) || regno == regi)
+ regcache_collect (regi, regp + PT_R0 + regi);
+ }
+
+ if ((regno == -1) || regno == PC_REGNUM)
+ regcache_collect (PC_REGNUM, regp + PT_NIP);
+ if ((regno == -1)
+ || regno == tdep->ppc_lr_regnum)
+ regcache_collect (tdep->ppc_lr_regnum, regp + PT_LNK);
+ if ((regno == -1)
+ || regno == tdep->ppc_cr_regnum)
+ regcache_collect (tdep->ppc_cr_regnum, regp + PT_CCR);
+ if ((regno == -1)
+ || regno == tdep->ppc_xer_regnum)
+ regcache_collect (tdep->ppc_xer_regnum, regp + PT_XER);
+ if ((regno == -1)
+ || regno == tdep->ppc_ctr_regnum)
+ regcache_collect (tdep->ppc_ctr_regnum, regp + PT_CTR);
+ if ((regno == -1)
+ || regno == tdep->ppc_mq_regnum)
+ regcache_collect (tdep->ppc_mq_regnum, regp + PT_MQ);
+ if ((regno == -1)
+ || regno == tdep->ppc_ps_regnum)
+ regcache_collect (tdep->ppc_ps_regnum, regp + PT_MSR);
}
-supply_fpregset (fpregset_t * fpregsetp)
+void
+supply_fpregset (gdb_fpregset_t * fpregsetp)
{
int regi;
for (regi = 0; regi < 32; regi++)
supply_register (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
}
}
+
+/* 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 (gdb_fpregset_t *fpregsetp, int regno)
+{
+ int regi;
+
+ for (regi = 0; regi < 32; regi++)
+ {
+ if ((regno == -1) || (regno == FP0_REGNUM + regi))
+ regcache_collect (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
+ }
+}
projects / deliverable / binutils-gdb.git / blobdiff