X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Finfptrace.c;h=6147cbe896453cc65bcea376257cfeb8a7245a42;hb=db16b7486486282b8831f38d759da1bc3255cd9c;hp=87178cd3dfea7079341125d06558d3de25b2d9a1;hpb=997cc2c0a3ca76b3da1489ce530df5d0c3a46a2c;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/infptrace.c b/gdb/infptrace.c index 87178cd3df..6147cbe896 100644 --- a/gdb/infptrace.c +++ b/gdb/infptrace.c @@ -1,54 +1,80 @@ /* Low level Unix child interface to ptrace, for GDB when running under Unix. - Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. + Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, + 1998, 1999, 2000, 2001, 2002 + Free Software Foundation, Inc. -This file is part of GDB. + 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 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. + 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. */ + 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 "target.h" +#include "gdb_string.h" +#include "regcache.h" + +#include "gdb_wait.h" + +#include "command.h" #ifdef USG #include #endif #include -#include +#include "gdb_dirent.h" #include #include -#ifndef USG -#ifdef PTRACE_IN_WRONG_PLACE + +#ifdef HAVE_PTRACE_H #include #else +#ifdef HAVE_SYS_PTRACE_H #include #endif #endif +#if !defined (PT_READ_I) +#define PT_READ_I 1 /* Read word from text space */ +#endif +#if !defined (PT_READ_D) +#define PT_READ_D 2 /* Read word from data space */ +#endif +#if !defined (PT_READ_U) +#define PT_READ_U 3 /* Read word from kernel user struct */ +#endif +#if !defined (PT_WRITE_I) +#define PT_WRITE_I 4 /* Write word to text space */ +#endif +#if !defined (PT_WRITE_D) +#define PT_WRITE_D 5 /* Write word to data space */ +#endif +#if !defined (PT_WRITE_U) +#define PT_WRITE_U 6 /* Write word to kernel user struct */ +#endif +#if !defined (PT_CONTINUE) +#define PT_CONTINUE 7 /* Continue after signal */ +#endif +#if !defined (PT_STEP) +#define PT_STEP 9 /* Set flag for single stepping */ +#endif #if !defined (PT_KILL) -#define PT_KILL 8 -#define PT_STEP 9 -#define PT_CONTINUE 7 -#define PT_READ_U 3 -#define PT_WRITE_U 6 -#define PT_READ_I 1 -#define PT_READ_D 2 -#define PT_WRITE_I 4 -#define PT_WRITE_D 5 -#endif /* No PT_KILL. */ +#define PT_KILL 8 /* Send child a SIGKILL signal */ +#endif #ifndef PT_ATTACH #define PT_ATTACH PTRACE_ATTACH @@ -61,7 +87,12 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef NO_SYS_FILE #include #endif -#include +#if 0 +/* Don't think this is used anymore. On the sequent (not sure whether it's + dynix or ptx or both), it is included unconditionally by sys/user.h and + not protected against multiple inclusion. */ +#include "gdb_stat.h" +#endif #if !defined (FETCH_INFERIOR_REGISTERS) #include /* Probably need to poke the user structure */ @@ -70,54 +101,154 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #endif /* KERNEL_U_ADDR_BSD. */ #endif /* !FETCH_INFERIOR_REGISTERS */ +#if !defined (CHILD_XFER_MEMORY) +static void udot_info (char *, int); +#endif + +#if !defined (FETCH_INFERIOR_REGISTERS) +static void fetch_register (int); +static void store_register (int); +#endif + +void _initialize_kernel_u_addr (void); +void _initialize_infptrace (void); + /* This function simply calls ptrace with the given arguments. It exists so that all calls to ptrace are isolated in this machine-dependent file. */ int -call_ptrace (request, pid, addr, data) - int request, pid; - PTRACE_ARG3_TYPE addr; - int data; +call_ptrace (int request, int pid, PTRACE_ARG3_TYPE addr, int data) { - return ptrace (request, pid, addr, data); + int pt_status = 0; + +#if 0 + int saved_errno; + + printf ("call_ptrace(request=%d, pid=%d, addr=0x%x, data=0x%x)", + request, pid, addr, data); +#endif +#if defined(PT_SETTRC) + /* If the parent can be told to attach to us, try to do it. */ + if (request == PT_SETTRC) + { + errno = 0; +#if !defined (FIVE_ARG_PTRACE) + pt_status = ptrace (PT_SETTRC, pid, addr, data); +#else + /* Deal with HPUX 8.0 braindamage. We never use the + calls which require the fifth argument. */ + pt_status = ptrace (PT_SETTRC, pid, addr, data, 0); +#endif + if (errno) + perror_with_name ("ptrace"); +#if 0 + printf (" = %d\n", pt_status); +#endif + if (pt_status < 0) + return pt_status; + else + return parent_attach_all (pid, addr, data); + } +#endif + +#if defined(PT_CONTIN1) + /* On HPUX, PT_CONTIN1 is a form of continue that preserves pending + signals. If it's available, use it. */ + if (request == PT_CONTINUE) + request = PT_CONTIN1; +#endif + +#if defined(PT_SINGLE1) + /* On HPUX, PT_SINGLE1 is a form of step that preserves pending + signals. If it's available, use it. */ + if (request == PT_STEP) + request = PT_SINGLE1; +#endif + +#if 0 + saved_errno = errno; + errno = 0; +#endif +#if !defined (FIVE_ARG_PTRACE) + pt_status = ptrace (request, pid, addr, data); +#else + /* Deal with HPUX 8.0 braindamage. We never use the + calls which require the fifth argument. */ + pt_status = ptrace (request, pid, addr, data, 0); +#endif + +#if 0 + if (errno) + printf (" [errno = %d]", errno); + + errno = saved_errno; + printf (" = 0x%x\n", pt_status); +#endif + return pt_status; } -#ifdef DEBUG_PTRACE + +#if defined (DEBUG_PTRACE) || defined (FIVE_ARG_PTRACE) /* For the rest of the file, use an extra level of indirection */ /* This lets us breakpoint usefully on call_ptrace. */ #define ptrace call_ptrace #endif -/* This is used when GDB is exiting. It gives less chance of error.*/ +/* Wait for a process to finish, possibly running a target-specific + hook before returning. */ -void -kill_inferior_fast () +int +ptrace_wait (ptid_t ptid, int *status) { - if (inferior_pid == 0) - return; - ptrace (PT_KILL, inferior_pid, (PTRACE_ARG3_TYPE) 0, 0); - wait ((int *)0); + int wstate; + + wstate = wait (status); + target_post_wait (pid_to_ptid (wstate), *status); + return wstate; } void -kill_inferior () +kill_inferior (void) { - kill_inferior_fast (); + int status; + int pid = PIDGET (inferior_ptid); + + if (pid == 0) + return; + + /* This once used to call "kill" to kill the inferior just in case + the inferior was still running. As others have noted in the past + (kingdon) there shouldn't be any way to get here if the inferior + is still running -- else there's a major problem elsewere in gdb + and it needs to be fixed. + + The kill call causes problems under hpux10, so it's been removed; + if this causes problems we'll deal with them as they arise. */ + ptrace (PT_KILL, pid, (PTRACE_ARG3_TYPE) 0, 0); + ptrace_wait (null_ptid, &status); target_mourn_inferior (); } +#ifndef CHILD_RESUME + /* Resume execution of the inferior process. If STEP is nonzero, single-step it. If SIGNAL is nonzero, give it that signal. */ void -child_resume (step, signal) - int step; - int signal; +child_resume (ptid_t ptid, int step, enum target_signal signal) { + int pid = PIDGET (ptid); + errno = 0; + if (pid == -1) + /* Resume all threads. */ + /* I think this only gets used in the non-threaded case, where "resume + all threads" and "resume inferior_ptid" are the same. */ + pid = PIDGET (inferior_ptid); + /* An address of (PTRACE_ARG3_TYPE)1 tells ptrace to continue from where it was. (If GDB wanted it to start some other way, we have already written a new PC value to the child.) @@ -128,27 +259,29 @@ child_resume (step, signal) instructions), so we don't have to worry about that here. */ if (step) - ptrace (PT_STEP, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal); + { + if (SOFTWARE_SINGLE_STEP_P ()) + internal_error (__FILE__, __LINE__, "failed internal consistency check"); /* Make sure this doesn't happen. */ + else + ptrace (PT_STEP, pid, (PTRACE_ARG3_TYPE) 1, + target_signal_to_host (signal)); + } else -#ifdef AIX_BUGGY_PTRACE_CONTINUE - AIX_BUGGY_PTRACE_CONTINUE; -#else - ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal); -#endif + ptrace (PT_CONTINUE, pid, (PTRACE_ARG3_TYPE) 1, + target_signal_to_host (signal)); if (errno) - perror_with_name ("ptrace"); + { + perror_with_name ("ptrace"); + } } +#endif /* CHILD_RESUME */ -#ifdef ATTACH_DETACH -/* Nonzero if we are debugging an attached process rather than - an inferior. */ -extern int attach_flag; +#ifdef ATTACH_DETACH /* Start debugging the process whose number is PID. */ int -attach (pid) - int pid; +attach (int pid) { errno = 0; ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0); @@ -163,28 +296,33 @@ attach (pid) SIGNAL = 0 means just continue it. */ void -detach (signal) - int signal; +detach (int signal) { errno = 0; - ptrace (PT_DETACH, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal); + ptrace (PT_DETACH, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) 1, + signal); if (errno) - perror_with_name ("ptrace"); + print_sys_errmsg ("ptrace", errno); attach_flag = 0; } #endif /* ATTACH_DETACH */ -#if !defined (FETCH_INFERIOR_REGISTERS) +/* Default the type of the ptrace transfer to int. */ +#ifndef PTRACE_XFER_TYPE +#define PTRACE_XFER_TYPE int +#endif /* KERNEL_U_ADDR is the amount to subtract from u.u_ar0 to get the offset in the core file of the register values. */ -#if defined (KERNEL_U_ADDR_BSD) +#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS) /* Get kernel_u_addr using BSD-style nlist(). */ CORE_ADDR kernel_u_addr; +#endif /* KERNEL_U_ADDR_BSD. */ void -_initialize_kernel_u_addr () +_initialize_kernel_u_addr (void) { +#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS) struct nlist names[2]; names[0].n_un.n_name = "_u"; @@ -192,31 +330,12 @@ _initialize_kernel_u_addr () if (nlist ("/vmunix", names) == 0) kernel_u_addr = names[0].n_value; else - fatal ("Unable to get kernel u area address."); -} + internal_error (__FILE__, __LINE__, + "Unable to get kernel u area address."); #endif /* KERNEL_U_ADDR_BSD. */ - -#if defined (KERNEL_U_ADDR_HPUX) -/* Get kernel_u_addr using HPUX-style nlist(). */ -CORE_ADDR kernel_u_addr; - -struct hpnlist { - char * n_name; - long n_value; - unsigned char n_type; - unsigned char n_length; - short n_almod; - short n_unused; -}; -static struct hpnlist nl[] = {{ "_u", -1, }, { (char *) 0, }}; - -/* read the value of the u area from the hp-ux kernel */ -void _initialize_kernel_u_addr () -{ - nlist ("/hp-ux", &nl); - kernel_u_addr = nl[0].n_value; } -#endif /* KERNEL_U_ADDR_HPUX. */ + +#if !defined (FETCH_INFERIOR_REGISTERS) #if !defined (offsetof) #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) @@ -225,49 +344,48 @@ void _initialize_kernel_u_addr () /* U_REGS_OFFSET is the offset of the registers within the u area. */ #if !defined (U_REGS_OFFSET) #define U_REGS_OFFSET \ - ptrace (PT_READ_U, inferior_pid, \ + ptrace (PT_READ_U, PIDGET (inferior_ptid), \ (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \ - KERNEL_U_ADDR #endif -/* Registers we shouldn't try to fetch. */ -#if !defined (CANNOT_FETCH_REGISTER) -#define CANNOT_FETCH_REGISTER(regno) 0 -#endif - /* Fetch one register. */ static void -fetch_register (regno) - int regno; +fetch_register (int regno) { - register unsigned int regaddr; - char buf[MAX_REGISTER_RAW_SIZE]; - char mess[128]; /* For messages */ + /* This isn't really an address. But ptrace thinks of it as one. */ + CORE_ADDR regaddr; + char mess[128]; /* For messages */ register int i; - - /* Offset of registers within the u area. */ - unsigned int offset; + unsigned int offset; /* Offset of registers within the u area. */ + char buf[MAX_REGISTER_SIZE]; + int tid; if (CANNOT_FETCH_REGISTER (regno)) { - bzero (buf, REGISTER_RAW_SIZE (regno)); /* Supply zeroes */ + 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 */ + offset = U_REGS_OFFSET; regaddr = register_addr (regno, offset); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) + for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) { errno = 0; - *(int *) &buf[i] = ptrace (PT_READ_U, inferior_pid, - (PTRACE_ARG3_TYPE) regaddr, 0); - regaddr += sizeof (int); + *(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)", reg_names[regno], regno); + sprintf (mess, "reading register %s (#%d)", + REGISTER_NAME (regno), regno); perror_with_name (mess); } } @@ -275,159 +393,220 @@ fetch_register (regno) } -/* Fetch all registers, or just one, from the child process. */ +/* Fetch register values from the inferior. + If REGNO is negative, do this for all registers. + Otherwise, REGNO specifies which register (so we can save time). */ void -fetch_inferior_registers (regno) - int regno; +fetch_inferior_registers (int regno) { - if (regno == -1) - for (regno = 0; regno < NUM_REGS; regno++) + if (regno >= 0) + { fetch_register (regno); + } else - fetch_register (regno); + { + for (regno = 0; regno < NUM_REGS; regno++) + { + fetch_register (regno); + } + } } -/* Registers we shouldn't try to store. */ -#if !defined (CANNOT_STORE_REGISTER) -#define CANNOT_STORE_REGISTER(regno) 0 -#endif - -/* 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). */ +/* Store one register. */ -void -store_inferior_registers (regno) - int regno; +static void +store_register (int regno) { - register unsigned int regaddr; - char buf[80]; - extern char registers[]; + /* This isn't really an address. But ptrace thinks of it as one. */ + CORE_ADDR regaddr; + char mess[128]; /* For messages */ register int i; + unsigned int offset; /* Offset of registers within the u area. */ + int tid; + char buf[MAX_REGISTER_SIZE]; + + if (CANNOT_STORE_REGISTER (regno)) + { + return; + } - unsigned int offset = U_REGS_OFFSET; + /* Overload thread id onto process id */ + if ((tid = TIDGET (inferior_ptid)) == 0) + tid = PIDGET (inferior_ptid); /* no thread id, just use process id */ - if (regno >= 0) + offset = U_REGS_OFFSET; + + regaddr = register_addr (regno, offset); + + /* Put the contents of regno into a local buffer */ + regcache_collect (regno, buf); + + /* Store the local buffer into the inferior a chunk at the time. */ + for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) { - regaddr = register_addr (regno, offset); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int)) + errno = 0; + ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr, + *(PTRACE_XFER_TYPE *) (buf + i)); + regaddr += sizeof (PTRACE_XFER_TYPE); + if (errno != 0) { - errno = 0; - ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, - *(int *) ®isters[REGISTER_BYTE (regno) + i]); - if (errno != 0) - { - sprintf (buf, "writing register number %d(%d)", regno, i); - perror_with_name (buf); - } - regaddr += sizeof(int); + sprintf (mess, "writing register %s (#%d)", + REGISTER_NAME (regno), regno); + perror_with_name (mess); } } +} + +/* Store our register values back into the inferior. + If REGNO is negative, do this for all registers. + Otherwise, REGNO specifies which register (so we can save time). */ + +void +store_inferior_registers (int regno) +{ + if (regno >= 0) + { + store_register (regno); + } else { for (regno = 0; regno < NUM_REGS; regno++) { - if (CANNOT_STORE_REGISTER (regno)) - continue; - regaddr = register_addr (regno, offset); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int)) - { - errno = 0; - ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, - *(int *) ®isters[REGISTER_BYTE (regno) + i]); - if (errno != 0) - { - sprintf (buf, "writing register number %d(%d)", regno, i); - perror_with_name (buf); - } - regaddr += sizeof(int); - } + store_register (regno); } } } #endif /* !defined (FETCH_INFERIOR_REGISTERS). */ + +/* Set an upper limit on alloca. */ +#ifndef GDB_MAX_ALLOCA +#define GDB_MAX_ALLOCA 0x1000 +#endif + +#if !defined (CHILD_XFER_MEMORY) /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory - in the NEW_SUN_PTRACE case. - It ought to be straightforward. But it appears that writing did - not write the data that I specified. I cannot understand where - it got the data that it actually did write. */ - -/* Copy LEN bytes to or from inferior's memory starting at MEMADDR - to debugger memory starting at MYADDR. Copy to inferior if - WRITE is nonzero. - - Returns the length copied, which is either the LEN argument or zero. - This xfer function does not do partial moves, since child_ops - doesn't allow memory operations to cross below us in the target stack - anyway. */ + in the NEW_SUN_PTRACE case. It ought to be straightforward. But + it appears that writing did not write the data that I specified. I + cannot understand where it got the data that it actually did write. */ + +/* Copy LEN bytes to or from inferior's memory starting at MEMADDR to + debugger memory starting at MYADDR. Copy to inferior if WRITE is + nonzero. TARGET is ignored. + + Returns the length copied, which is either the LEN argument or + zero. This xfer function does not do partial moves, since + child_ops doesn't allow memory operations to cross below us in the + target stack anyway. */ int -child_xfer_memory (memaddr, myaddr, len, write, target) - CORE_ADDR memaddr; - char *myaddr; - int len; - int write; - struct target_ops *target; /* ignored */ +child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, + struct mem_attrib *attrib, struct target_ops *target) { - register int i; + int i; /* Round starting address down to longword boundary. */ - register CORE_ADDR addr = memaddr & - sizeof (int); + CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_XFER_TYPE); /* Round ending address up; get number of longwords that makes. */ - register int count - = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); + int count = ((((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) + / sizeof (PTRACE_XFER_TYPE)); + int alloc = count * sizeof (PTRACE_XFER_TYPE); + PTRACE_XFER_TYPE *buffer; + struct cleanup *old_chain = NULL; + +#ifdef PT_IO + /* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO request + that promises to be much more efficient in reading and writing + data in the traced process's address space. */ + + { + struct ptrace_io_desc piod; + + /* NOTE: We assume that there are no distinct address spaces for + instruction and data. */ + piod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D; + piod.piod_offs = (void *) memaddr; + piod.piod_addr = myaddr; + piod.piod_len = len; + + if (ptrace (PT_IO, PIDGET (inferior_ptid), (caddr_t) &piod, 0) == -1) + { + /* If the PT_IO request is somehow not supported, fallback on + using PT_WRITE_D/PT_READ_D. Otherwise we will return zero + to indicate failure. */ + if (errno != EINVAL) + return 0; + } + else + { + /* Return the actual number of bytes read or written. */ + return piod.piod_len; + } + } +#endif + /* Allocate buffer of that many longwords. */ - register int *buffer = (int *) alloca (count * sizeof (int)); + if (len < GDB_MAX_ALLOCA) + { + buffer = (PTRACE_XFER_TYPE *) alloca (alloc); + } + else + { + buffer = (PTRACE_XFER_TYPE *) xmalloc (alloc); + old_chain = make_cleanup (xfree, buffer); + } if (write) { - /* Fill start and end extra bytes of buffer with existing memory data. */ - - if (addr != memaddr || len < (int)sizeof (int)) { - /* Need part of initial word -- fetch it. */ - buffer[0] = ptrace (PT_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, - 0); - } - - if (count > 1) /* FIXME, avoid if even boundary */ + /* Fill start and end extra bytes of buffer with existing memory + data. */ + if (addr != memaddr || len < (int) sizeof (PTRACE_XFER_TYPE)) { - buffer[count - 1] - = ptrace (PT_READ_I, inferior_pid, - (PTRACE_ARG3_TYPE) (addr + (count - 1) * sizeof (int)), - 0); + /* Need part of initial word -- fetch it. */ + buffer[0] = ptrace (PT_READ_I, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) addr, 0); } - /* Copy data to be written over corresponding part of buffer */ + if (count > 1) /* FIXME, avoid if even boundary. */ + { + buffer[count - 1] = + ptrace (PT_READ_I, PIDGET (inferior_ptid), + ((PTRACE_ARG3_TYPE) + (addr + (count - 1) * sizeof (PTRACE_XFER_TYPE))), 0); + } - memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); + /* Copy data to be written over corresponding part of buffer. */ + memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), + myaddr, len); /* Write the entire buffer. */ - - for (i = 0; i < count; i++, addr += sizeof (int)) + for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) { errno = 0; - ptrace (PT_WRITE_D, inferior_pid, (PTRACE_ARG3_TYPE) addr, - buffer[i]); + ptrace (PT_WRITE_D, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) addr, buffer[i]); if (errno) { /* Using the appropriate one (I or D) is necessary for - Gould NP1, at least. */ + Gould NP1, at least. */ errno = 0; - ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, - buffer[i]); + ptrace (PT_WRITE_I, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) addr, buffer[i]); } if (errno) return 0; } +#ifdef CLEAR_INSN_CACHE + CLEAR_INSN_CACHE (); +#endif } else { - /* Read all the longwords */ - for (i = 0; i < count; i++, addr += sizeof (int)) + /* Read all the longwords. */ + for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) { errno = 0; - buffer[i] = ptrace (PT_READ_I, inferior_pid, + buffer[i] = ptrace (PT_READ_I, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) addr, 0); if (errno) return 0; @@ -435,7 +614,73 @@ child_xfer_memory (memaddr, myaddr, len, write, target) } /* Copy appropriate bytes out of the buffer. */ - memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); + memcpy (myaddr, + (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), + len); } + + if (old_chain != NULL) + do_cleanups (old_chain); return len; } + + +static void +udot_info (char *dummy1, int dummy2) +{ +#if defined (KERNEL_U_SIZE) + long udot_off; /* Offset into user struct */ + int udot_val; /* Value from user struct at udot_off */ + char mess[128]; /* For messages */ +#endif + + if (!target_has_execution) + { + error ("The program is not being run."); + } + +#if !defined (KERNEL_U_SIZE) + + /* Adding support for this command is easy. Typically you just add a + routine, called "kernel_u_size" that returns the size of the user + struct, to the appropriate *-nat.c file and then add to the native + config file "#define KERNEL_U_SIZE kernel_u_size()" */ + error ("Don't know how large ``struct user'' is in this version of gdb."); + +#else + + for (udot_off = 0; udot_off < KERNEL_U_SIZE; udot_off += sizeof (udot_val)) + { + if ((udot_off % 24) == 0) + { + if (udot_off > 0) + { + printf_filtered ("\n"); + } + printf_filtered ("%s:", paddr (udot_off)); + } + udot_val = ptrace (PT_READ_U, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) udot_off, 0); + if (errno != 0) + { + sprintf (mess, "\nreading user struct at offset 0x%s", + paddr_nz (udot_off)); + perror_with_name (mess); + } + /* Avoid using nonportable (?) "*" in print specs */ + printf_filtered (sizeof (int) == 4 ? " 0x%08x" : " 0x%16x", udot_val); + } + printf_filtered ("\n"); + +#endif +} +#endif /* !defined (CHILD_XFER_MEMORY). */ + + +void +_initialize_infptrace (void) +{ +#if !defined (CHILD_XFER_MEMORY) + add_info ("udot", udot_info, + "Print contents of kernel ``struct user'' for current child."); +#endif +}