From ce3a066d936533891c43cf478996268b40cb2cac Mon Sep 17 00:00:00 2001 From: Daniel Jacobowitz Date: Tue, 9 Apr 2002 21:17:45 +0000 Subject: [PATCH] 2002-04-09 Daniel Jacobowitz * gdbserver/inferiors.c: New file. * gdbserver/target.c: New file. * gdbserver/target.h: New file. * gdbserver/Makefile.in: Add target.o and inferiors.o. Update dependencies. * gdbserver/linux-low.c (inferior_pid): New static variable, moved from server.c. (linux_create_inferior): Renamed from create_inferior. Call add_inferior. Return 0 on success instead of a PID. (linux_attach): Renamed from myattach. (linux_kill): Renamed from kill_inferior. Call clear_inferiors (). (linux_thread_alive): Renamed from mythread_alive. (linux_wait): Renamed from mywait. Call clear_inferiors () if the child dies. (linux_resume): Renamed from myresume. Add missing ``return 0''. (regsets_store_inferior_registers): Correct error message. Add missing ``return 0''. (linux_fetch_registers): Renamed from fetch_inferior_registers. (linux_store_registers): Renamed from store_inferior_registers. (linux_read_memory): Renamed from read_inferior_memory. (linux_write_memory): Renamed from write_inferior_memory. (linux_target_ops): New structure. (initialize_low): Call set_target_ops (). * gdbserver/remote-utils.c (unhexify): New function. (hexify): New function. (input_interrupt): Send signals to ``signal_pid''. * gdbserver/server.c (inferior_pid): Remove. (start_inferior): Update create_inferior call. (attach_inferior): Call add_inferior. (handle_query): New function. (main): Call handle_query for `q' packets. * gdbserver/server.h: Include "target.h". Remove obsolete prototypes. Add prototypes for "inferiors.c", "target.c", hexify, and unhexify. --- gdb/ChangeLog | 36 ++++++++++ gdb/gdbserver/Makefile.in | 12 ++-- gdb/gdbserver/inferiors.c | 71 +++++++++++++++++++ gdb/gdbserver/linux-low.c | 64 +++++++++++------ gdb/gdbserver/remote-utils.c | 39 +++++++++- gdb/gdbserver/server.c | 35 +++++++-- gdb/gdbserver/server.h | 24 ++++--- gdb/gdbserver/target.c | 33 +++++++++ gdb/gdbserver/target.h | 133 +++++++++++++++++++++++++++++++++++ 9 files changed, 407 insertions(+), 40 deletions(-) create mode 100644 gdb/gdbserver/inferiors.c create mode 100644 gdb/gdbserver/target.c create mode 100644 gdb/gdbserver/target.h diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 3120f1c2f8..402d40aa1c 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,39 @@ +2002-04-09 Daniel Jacobowitz + + * gdbserver/inferiors.c: New file. + * gdbserver/target.c: New file. + * gdbserver/target.h: New file. + * gdbserver/Makefile.in: Add target.o and inferiors.o. Update + dependencies. + * gdbserver/linux-low.c (inferior_pid): New static variable, + moved from server.c. + (linux_create_inferior): Renamed from create_inferior. + Call add_inferior. Return 0 on success instead of a PID. + (linux_attach): Renamed from myattach. + (linux_kill): Renamed from kill_inferior. Call clear_inferiors (). + (linux_thread_alive): Renamed from mythread_alive. + (linux_wait): Renamed from mywait. Call clear_inferiors () if the + child dies. + (linux_resume): Renamed from myresume. Add missing ``return 0''. + (regsets_store_inferior_registers): Correct error message. + Add missing ``return 0''. + (linux_fetch_registers): Renamed from fetch_inferior_registers. + (linux_store_registers): Renamed from store_inferior_registers. + (linux_read_memory): Renamed from read_inferior_memory. + (linux_write_memory): Renamed from write_inferior_memory. + (linux_target_ops): New structure. + (initialize_low): Call set_target_ops (). + * gdbserver/remote-utils.c (unhexify): New function. + (hexify): New function. + (input_interrupt): Send signals to ``signal_pid''. + * gdbserver/server.c (inferior_pid): Remove. + (start_inferior): Update create_inferior call. + (attach_inferior): Call add_inferior. + (handle_query): New function. + (main): Call handle_query for `q' packets. + * gdbserver/server.h: Include "target.h". Remove obsolete prototypes. + Add prototypes for "inferiors.c", "target.c", hexify, and unhexify. + 2002-04-09 Daniel Jacobowitz * gdbserver/Makefile.in: Add WARN_CFLAGS. Update configury diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in index 076484c726..f557ae27b4 100644 --- a/gdb/gdbserver/Makefile.in +++ b/gdb/gdbserver/Makefile.in @@ -122,7 +122,9 @@ DEPFILES = @GDBSERVER_DEPFILES@ SOURCES = $(SFILES) TAGFILES = $(SOURCES) ${HFILES} ${ALLPARAM} ${POSSLIBS} -OBS = utils.o $(DEPFILES) server.o remote-utils.o regcache.o signals.o +OBS = inferiors.o regcache.o remote-utils.o server.o signals.o target.o \ + utils.o \ + $(DEPFILES) # Prevent Sun make from putting in the machine type. Setting # TARGET_ARCH to nothing works for SunOS 3, 4.0, but not for 4.1. @@ -230,12 +232,14 @@ unexport CHILLFLAGS CHILL_LIB CHILL_FOR_TARGET : regdat_sh = $(srcdir)/../regformats/regdat.sh regdef_h = $(srcdir)/../regformats/regdef.h regcache_h = $(srcdir)/regcache.h -server_h = $(srcdir)/server.h $(regcache_h) config.h +server_h = $(srcdir)/server.h $(regcache_h) config.h $(srcdir)/target.h -server.o: server.c $(server_h) +inferiors.o: inferiors.c $(server_h) +regcache.o: regcache.c $(server_h) $(regdef_h) remote-utils.o: remote-utils.c terminal.h $(server_h) +server.o: server.c $(server_h) +target.o: target.c $(server_h) utils.o: utils.c $(server_h) -regcache.o: regcache.c $(server_h) $(regdef_h) signals.o: ../signals/signals.c $(server_h) $(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $< -DGDBSERVER diff --git a/gdb/gdbserver/inferiors.c b/gdb/gdbserver/inferiors.c new file mode 100644 index 0000000000..1daa3c5de3 --- /dev/null +++ b/gdb/gdbserver/inferiors.c @@ -0,0 +1,71 @@ +/* Inferior process information for the remote server for GDB. + Copyright 2002 + Free Software Foundation, Inc. + + Contributed by MontaVista Software. + + 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 + +#include "server.h" + +struct inferior_info +{ + int pid; + struct inferior_info *next; +}; + +static struct inferior_info *inferiors; +struct inferior_info *current_inferior; +int signal_pid; + +void +add_inferior (int pid) +{ + struct inferior_info *new_inferior + = (struct inferior_info *) malloc (sizeof (*new_inferior)); + + memset (new_inferior, 0, sizeof (*new_inferior)); + + new_inferior->pid = pid; + + new_inferior->next = inferiors; + inferiors = new_inferior; + + if (current_inferior == NULL) + current_inferior = inferiors; + + if (signal_pid == 0) + signal_pid = pid; +} + +void +clear_inferiors (void) +{ + struct inferior_info *inf = inferiors, *next_inf; + + while (inf) + { + next_inf = inf->next; + free (inf); + inf = next_inf; + } + + inferiors = NULL; +} diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c index 4e40d0715f..7964f82324 100644 --- a/gdb/gdbserver/linux-low.c +++ b/gdb/gdbserver/linux-low.c @@ -49,11 +49,13 @@ extern int num_regs; extern int regmap[]; #endif +static int inferior_pid; + /* Start an inferior process and returns its pid. ALLARGS is a vector of program-name and args. */ -int -create_inferior (char *program, char **allargs) +static int +linux_create_inferior (char *program, char **allargs) { int pid; @@ -73,13 +75,16 @@ create_inferior (char *program, char **allargs) _exit (0177); } - return pid; + add_inferior (pid); + /* FIXME remove */ + inferior_pid = pid; + return 0; } /* Attach to an inferior process. */ -int -myattach (int pid) +static int +linux_attach (int pid) { if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0) { @@ -95,26 +100,27 @@ myattach (int pid) /* Kill the inferior process. Make us have no inferior. */ -void -kill_inferior (void) +static void +linux_kill (void) { if (inferior_pid == 0) return; ptrace (PTRACE_KILL, inferior_pid, 0, 0); wait (0); + clear_inferiors (); } /* Return nonzero if the given thread is still alive. */ -int -mythread_alive (int pid) +static int +linux_thread_alive (int pid) { return 1; } /* Wait for process, returns status */ -unsigned char -mywait (char *status) +static unsigned char +linux_wait (char *status) { int pid; int w; @@ -129,11 +135,13 @@ mywait (char *status) { fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); *status = 'W'; + clear_inferiors (); return ((unsigned char) WEXITSTATUS (w)); } else if (!WIFSTOPPED (w)) { fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); + clear_inferiors (); *status = 'X'; return ((unsigned char) WTERMSIG (w)); } @@ -148,8 +156,8 @@ mywait (char *status) If STEP is nonzero, single-step it. If SIGNAL is nonzero, give it that signal. */ -void -myresume (int step, int signal) +static void +linux_resume (int step, int signal) { errno = 0; ptrace (step ? PTRACE_SINGLESTEP : PTRACE_CONT, inferior_pid, 1, signal); @@ -318,6 +326,7 @@ regsets_fetch_inferior_registers (void) regset->store_function (buf); regset ++; } + return 0; } static int @@ -360,18 +369,19 @@ regsets_store_inferior_registers (void) } else { - perror ("Warning: ptrace(regsets_fetch_inferior_registers)"); + perror ("Warning: ptrace(regsets_store_inferior_registers)"); } } regset ++; } + return 0; } #endif /* HAVE_LINUX_REGSETS */ void -fetch_inferior_registers (int regno) +linux_fetch_registers (int regno) { #ifdef HAVE_LINUX_REGSETS if (use_regsets_p) @@ -386,7 +396,7 @@ fetch_inferior_registers (int regno) } void -store_inferior_registers (int regno) +linux_store_registers (int regno) { #ifdef HAVE_LINUX_REGSETS if (use_regsets_p) @@ -404,8 +414,8 @@ store_inferior_registers (int regno) /* Copy LEN bytes from inferior's memory starting at MEMADDR to debugger memory starting at MYADDR. */ -void -read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) +static void +linux_read_memory (CORE_ADDR memaddr, char *myaddr, int len) { register int i; /* Round starting address down to longword boundary. */ @@ -433,8 +443,8 @@ read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) On failure (cannot write the inferior) returns the value of errno. */ -int -write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) +static int +linux_write_memory (CORE_ADDR memaddr, char *myaddr, int len) { register int i; /* Round starting address down to longword boundary. */ @@ -477,8 +487,22 @@ write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) return 0; } +static struct target_ops linux_target_ops = { + linux_create_inferior, + linux_attach, + linux_kill, + linux_thread_alive, + linux_resume, + linux_wait, + linux_fetch_registers, + linux_store_registers, + linux_read_memory, + linux_write_memory, +}; + void initialize_low (void) { + set_target_ops (&linux_target_ops); init_registers (); } diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c index edfcace90e..c61f1e03b4 100644 --- a/gdb/gdbserver/remote-utils.c +++ b/gdb/gdbserver/remote-utils.c @@ -186,6 +186,25 @@ fromhex (int a) return 0; } +int +unhexify (char *bin, const char *hex, int count) +{ + int i; + + for (i = 0; i < count; i++) + { + if (hex[0] == 0 || hex[1] == 0) + { + /* Hex string is short, or of uneven length. + Return the count that has been converted so far. */ + return i; + } + *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); + hex += 2; + } + return i; +} + /* Convert number NIB to a hex digit. */ static int @@ -197,6 +216,24 @@ tohex (int nib) return 'a' + nib - 10; } +int +hexify (char *hex, const char *bin, int count) +{ + int i; + + /* May use a length, or a nul-terminated string as input. */ + if (count == 0) + count = strlen (bin); + + for (i = 0; i < count; i++) + { + *hex++ = tohex ((*bin >> 4) & 0xf); + *hex++ = tohex (*bin++ & 0xf); + } + *hex = 0; + return i; +} + /* Send a packet to the remote machine, with error checking. The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */ @@ -292,7 +329,7 @@ input_interrupt (int unused) return; } - kill (inferior_pid, SIGINT); + kill (signal_pid, SIGINT); } } diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c index b567688031..94c27d3e4c 100644 --- a/gdb/gdbserver/server.c +++ b/gdb/gdbserver/server.c @@ -27,13 +27,14 @@ int thread_from_wait; int old_thread_from_wait; int extended_protocol; jmp_buf toplevel; -int inferior_pid; static unsigned char start_inferior (char *argv[], char *statusptr) { - inferior_pid = create_inferior (argv[0], argv); - fprintf (stderr, "Process %s created; pid = %d\n", argv[0], inferior_pid); + /* FIXME Check error? Or turn to void. */ + create_inferior (argv[0], argv); + /* FIXME Print pid properly. */ + fprintf (stderr, "Process %s created; pid = %d\n", argv[0], signal_pid); /* Wait till we are at 1st instruction in program, return signal number. */ return mywait (statusptr); @@ -47,7 +48,7 @@ attach_inferior (int pid, char *statusptr, unsigned char *sigptr) if (myattach (pid) != 0) return -1; - inferior_pid = pid; + add_inferior (pid); *sigptr = mywait (statusptr); @@ -55,6 +56,29 @@ attach_inferior (int pid, char *statusptr, unsigned char *sigptr) } extern int remote_debug; + +/* Handle all of the extended 'q' packets. */ +void +handle_query (char *own_buf) +{ + if (strcmp ("qSymbol::", own_buf) == 0) + { +#if 0 + strcpy (own_buf, "qSymbol:"); + hexify (own_buf + strlen ("qSymbol:"), "main", 4); + putpkt (own_buf); + getpkt (own_buf); + fprintf (stderr, "Got %s", own_buf); +#endif + strcpy (own_buf, "OK"); + return; + } + + /* Otherwise we didn't know what packet it was. Say we didn't + understand it. */ + own_buf[0] = 0; +} + static int attached; int @@ -132,6 +156,9 @@ main (int argc, char *argv[]) ch = own_buf[i++]; switch (ch) { + case 'q': + handle_query (own_buf); + break; case 'd': remote_debug = !remote_debug; break; diff --git a/gdb/gdbserver/server.h b/gdb/gdbserver/server.h index 9de0d7395f..74c00d49fe 100644 --- a/gdb/gdbserver/server.h +++ b/gdb/gdbserver/server.h @@ -53,25 +53,24 @@ typedef long long CORE_ADDR; #include "regcache.h" #include "gdb/signals.h" +#include "target.h" /* Target-specific functions */ -int create_inferior (char *program, char **allargs); -void kill_inferior (void); -void fetch_inferior_registers (int regno); -void store_inferior_registers (int regno); -int mythread_alive (int pid); -void myresume (int step, int signo); -unsigned char mywait (char *status); -void read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len); -int write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len); -int create_inferior (); void initialize_low (); /* Target-specific variables */ extern char *registers; +/* From inferiors.c. */ + +struct inferior_info; +extern struct inferior_info *current_inferior; +extern int signal_pid; +void add_inferior (int pid); +void clear_inferiors (void); + /* Public variables in server.c */ extern int cont_thread; @@ -80,7 +79,6 @@ extern int thread_from_wait; extern int old_thread_from_wait; extern jmp_buf toplevel; -extern int inferior_pid; /* Functions from remote-utils.c */ @@ -101,6 +99,10 @@ void decode_m_packet (char *from, CORE_ADDR * mem_addr_ptr, void decode_M_packet (char *from, CORE_ADDR * mem_addr_ptr, unsigned int *len_ptr, char *to); +int unhexify (char *bin, const char *hex, int count); +int hexify (char *hex, const char *bin, int count); + + /* Functions from ``signals.c''. */ enum target_signal target_signal_from_host (int hostsig); int target_signal_to_host_p (enum target_signal oursig); diff --git a/gdb/gdbserver/target.c b/gdb/gdbserver/target.c new file mode 100644 index 0000000000..3bd87d3ea0 --- /dev/null +++ b/gdb/gdbserver/target.c @@ -0,0 +1,33 @@ +/* Target operations for the remote server for GDB. + Copyright 2002 + Free Software Foundation, Inc. + + Contributed by MontaVista Software. + + 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 "server.h" + +struct target_ops *the_target; + +void +set_target_ops (struct target_ops *target) +{ + the_target = (struct target_ops *) malloc (sizeof (*the_target)); + memcpy (the_target, target, sizeof (*the_target)); +} diff --git a/gdb/gdbserver/target.h b/gdb/gdbserver/target.h new file mode 100644 index 0000000000..094f4ce435 --- /dev/null +++ b/gdb/gdbserver/target.h @@ -0,0 +1,133 @@ +/* Target operations for the remote server for GDB. + Copyright 2002 + Free Software Foundation, Inc. + + Contributed by MontaVista Software. + + 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. */ + +#ifndef TARGET_H +#define TARGET_H + +struct target_ops +{ + /* Start a new process. + + PROGRAM is a path to the program to execute. + ARGS is a standard NULL-terminated array of arguments, + to be passed to the inferior as ``argv''. + + Returns 0 on success, -1 on failure. Registers the new + process with the process list. */ + + int (*create_inferior) (char *program, char **args); + + /* Attach to a running process. + + PID is the process ID to attach to, specified by the user + or a higher layer. */ + + int (*attach) (int pid); + + /* Kill all inferiors. */ + + void (*kill) (void); + + /* Return 1 iff the thread with process ID PID is alive. */ + + int (*thread_alive) (int pid); + + /* Resume the inferior process. + + If STEP is non-zero, we want to single-step. + + If SIGNAL is nonzero, send the process that signal as we resume it. + */ + + void (*resume) (int step, int signo); + + /* Wait for the inferior process to change state. + + STATUSP will be filled in with a response code to send to GDB. + + Returns the signal which caused the process to stop. */ + + unsigned char (*wait) (char *status); + + /* Fetch registers from the inferior process. + + If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */ + + void (*fetch_registers) (int regno); + + /* Store registers to the inferior process. + + If REGNO is -1, store all registers; otherwise, store at least REGNO. */ + + void (*store_registers) (int regno); + + /* Read memory from the inferior process. + + Read LEN bytes at MEMADDR into a buffer at MYADDR. */ + + void (*read_memory) (CORE_ADDR memaddr, char *myaddr, int len); + + /* Write memory to the inferior process. + + Write LEN bytes from the buffer at MYADDR to MEMADDR. + + Returns 0 on success and errno on failure. */ + + int (*write_memory) (CORE_ADDR memaddr, char *myaddr, int len); +}; + +extern struct target_ops *the_target; + +void set_target_ops (struct target_ops *); + +#define create_inferior(program, args) \ + (*the_target->create_inferior) (program, args) + +#define myattach(pid) \ + (*the_target->attach) (pid) + +#define kill_inferior() \ + (*the_target->kill) () + +#define mythread_alive(pid) \ + (*the_target->thread_alive) (pid) + +#define myresume(step,signo) \ + (*the_target->resume) (step, signo) + +#define mywait(statusp) \ + (*the_target->wait) (statusp) + +#define fetch_inferior_registers(regno) \ + (*the_target->fetch_registers) (regno) + +#define store_inferior_registers(regno) \ + (*the_target->store_registers) (regno) + +#define read_inferior_memory(memaddr,myaddr,len) \ + (*the_target->read_memory) (memaddr, myaddr, len) + +#define write_inferior_memory(memaddr,myaddr,len) \ + (*the_target->write_memory) (memaddr, myaddr, len) + +#endif /* TARGET_H */ -- 2.34.1