1993-07-02 19:18:14 +00:00
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#include "defs.h"
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#include <sys/signal.h> /* for MAXSIG in sys/user.h */
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#include <sys/types.h> /* for ushort in sys/dir.h */
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#include <sys/dir.h> /* for struct direct in sys/user.h */
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#include <sys/user.h>
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#include <nlist.h>
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#if !defined (offsetof)
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#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
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#endif
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/* Return the address in the core dump or inferior of register REGNO.
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BLOCKEND is the address of the end of the user structure. */
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unsigned int
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register_addr (regno, blockend)
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int regno;
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int blockend;
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{
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static int sysv68reg[] =
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{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, -1, 15, 16 };
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if (regno >= 0 && regno < sizeof(sysv68reg) / sizeof(sysv68reg[0]))
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return blockend + sysv68reg[regno] * 4;
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else if (regno < FPC_REGNUM)
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return offsetof (struct user, u_fpu.regs.reg[regno - FP0_REGNUM]
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else if (regno == FPC_REGNUM)
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return offsetof (struct user, u_fpu.regs.control);
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else if (regno == FPS_REGNUM)
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return offsetof (struct user, u_fpu.regs.status);
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else if (regno == FPI_REGNUM)
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return offsetof (struct user, u_fpu.regs.iaddr);
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else
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{
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fprintf (stderr, "\
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Internal error: invalid register number %d in REGISTER_U_ADDR\n",
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regno);
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return blockend;
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}
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}
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CORE_ADDR kernel_u_addr;
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static struct nlist nl[] = {{ "_u", -1, }, { (char *) 0, }};
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/* Read the value of the u area from the kernel. */
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void _initialize_kernel_u_addr ()
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{
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if (nlist ("/sysV68", nl) == 0)
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kernel_u_addr = nl[0].n_value;
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else
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{
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perror ("Cannot get kernel u area address");
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exit (1);
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}
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}
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