diff options
| -rw-r--r-- | gdb/.Sanitize | 2 | ||||
| -rw-r--r-- | gdb/ChangeLog | 19 | ||||
| -rw-r--r-- | gdb/Makefile.in | 9 | ||||
| -rw-r--r-- | gdb/config/m88k/m88k.mt | 2 | ||||
| -rw-r--r-- | gdb/dcache.c | 189 | ||||
| -rw-r--r-- | gdb/dcache.h | 67 | ||||
| -rw-r--r-- | gdb/remote-bug.c | 212 |
7 files changed, 306 insertions, 194 deletions
diff --git a/gdb/.Sanitize b/gdb/.Sanitize index 6e6697f..ba68f53 100644 --- a/gdb/.Sanitize +++ b/gdb/.Sanitize @@ -81,6 +81,8 @@ coredep.c corelow.c cp-valprint.c dbxread.c +dcache.c +dcache.h defs.h delta68-nat.c demangle.c diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 07efc36..b05f8ad 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,22 @@ +Tue Aug 31 15:01:27 1993 K. Richard Pixley (rich@sendai.cygnus.com) + + Break dcache code out of remote-bug.c into dcache.[hc]. + * Makefile.in (dcache_h): new macro. + (HFILES): added $(dcache_h). + (ALLDEPFILES): added dcache.c. + (dcache.o): new rule. + (remote-bug.o): now depends on $(dcache_h). + * remote-bug.c: include dcache.h. remove externs for insque and + remque, add extern for bcopy. Prototype bug_close, + bug_clear_breakpoints, bug_write_cr. dcache code moved to + dcache.[hc]. Changed dcache calling convention to include an + initial DCACHE argument. + (bug_dcache): new static variable. + (bug_read_inferior_memory): change second arg to + unsigned char. + * dcache.[ch]: new files. + * config/m88k/m88k.mt (TDEPFILES): add dcache.o. + Tue Aug 31 10:33:13 1993 Jim Kingdon (kingdon@lioth.cygnus.com) * c-typeprint.c (c_print_type_base): Treat show = 0 just like diff --git a/gdb/Makefile.in b/gdb/Makefile.in index ee3e02a..ba227cc 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -336,6 +336,7 @@ udiheaders = \ 29k-share/udi/udipt29k.h \ 29k-share/udi/udisoc.h +dcache_h = dcache.h gdbcore_h = gdbcore.h $(bfd_h) @@ -371,7 +372,7 @@ HFILES = buildsym.h call-cmds.h defs.h environ.h $(gdbcmd_h) \ nindy-share/env.h nindy-share/stop.h \ vx-share/dbgRpcLib.h vx-share/ptrace.h vx-share/vxTypes.h \ vx-share/vxWorks.h vx-share/wait.h vx-share/xdr_ld.h \ - vx-share/xdr_ptrace.h vx-share/xdr_rdb.h thread.h + vx-share/xdr_ptrace.h vx-share/xdr_rdb.h thread.h $(dcache_h) # GDB "info" files, which should be included in their entirety INFOFILES = gdb.info* @@ -799,7 +800,7 @@ unexport CHILLFLAGS CHILL_LIB CHILL_FOR_TARGET : ALLDEPFILES = 29k-share/udi/udip2soc.c 29k-share/udi/udr.c \ a29k-pinsn.c a29k-tdep.c a68v-nat.c altos-xdep.c arm-convert.s \ arm-pinsn.c arm-tdep.c arm-xdep.c convex-pinsn.c convex-tdep.c \ - convex-xdep.c core-svr4.c coredep.c corelow.c delta68-nat.c \ + convex-xdep.c core-svr4.c coredep.c corelow.c dcache.c delta68-nat.c \ dpx2-nat.c exec.c fork-child.c \ go32-xdep.c gould-pinsn.c gould-xdep.c h8300-tdep.c h8500-tdep.c \ hp300ux-nat.c hppa-pinsn.c hppa-tdep.c hppab-nat.c hppah-nat.c \ @@ -1013,6 +1014,8 @@ corelow.o: corelow.c $(command_h) $(defs_h) $(gdbcore_h) $(inferior_h) \ cp-valprint.o: cp-valprint.c $(defs_h) $(expression_h) $(gdbcmd_h) \ $(gdbtypes_h) $(symtab_h) $(value_h) +dcache.o: dcache.c $(dcache_h) + dbxread.o: dbxread.c $(breakpoint_h) buildsym.h $(command_h) \ complaints.h $(defs_h) $(expression_h) gdb-stabs.h $(gdbcore_h) \ $(gdbtypes_h) language.h objfiles.h partial-stab.h stabsread.h \ @@ -1195,7 +1198,7 @@ remote-adapt.o: remote-adapt.c $(wait_h) $(defs_h) $(gdbcore_h) \ $(inferior_h) target.h terminal.h remote-bug.o: remote-bug.c $(wait_h) $(defs_h) $(gdbcore_h) \ - $(inferior_h) target.h terminal.h + $(inferior_h) target.h terminal.h $(dcache_h) remote-eb.o: remote-eb.c $(wait_h) $(srcdir)/config/a29k/tm-a29k.h \ $(defs_h) $(gdbcore_h) $(inferior_h) symfile.h target.h terminal.h diff --git a/gdb/config/m88k/m88k.mt b/gdb/config/m88k/m88k.mt index f48ea2f..3e2ac33 100644 --- a/gdb/config/m88k/m88k.mt +++ b/gdb/config/m88k/m88k.mt @@ -1,3 +1,3 @@ # Target: Motorola 88000 Binary Compatability Standard -TDEPFILES= m88k-tdep.o m88k-pinsn.o exec.o remote-bug.o +TDEPFILES= m88k-tdep.o m88k-pinsn.o exec.o remote-bug.o dcache.o TM_FILE= tm-m88k.h diff --git a/gdb/dcache.c b/gdb/dcache.c new file mode 100644 index 0000000..498c22e --- /dev/null +++ b/gdb/dcache.c @@ -0,0 +1,189 @@ +/* Caching code. Typically used by remote back ends for + caching remote memory. + + Copyright 1992, 1993 Free Software Foundation, Inc. + +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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "defs.h" +#include "dcache.h" + +extern int insque(); +extern int remque(); + +/* The data cache records all the data read from the remote machine + since the last time it stopped. + + Each cache block holds line_size bytes of data + starting at a multiple-of-line_size address. */ + +#define LINE_SIZE_MASK ((LINE_SIZE - 1)) /* eg 7*2+1= 111*/ +#define XFORM(x) (((x) & LINE_SIZE_MASK) >> 2) + +/* Free all the data cache blocks, thus discarding all cached data. */ +void +dcache_flush (dcache) + DCACHE *dcache; +{ + register struct dcache_block *db; + + while ((db = dcache->dcache_valid.next) != &dcache->dcache_valid) + { + remque (db); + insque (db, &dcache->dcache_free); + } +} + +/* + * If addr is present in the dcache, return the address of the block + * containing it. + */ +struct dcache_block * +dcache_hit (dcache, addr) + DCACHE *dcache; + unsigned int addr; +{ + register struct dcache_block *db; + + if (addr & 3) + abort (); + + /* Search all cache blocks for one that is at this address. */ + db = dcache->dcache_valid.next; + while (db != &dcache->dcache_valid) + { + if ((addr & ~LINE_SIZE_MASK) == db->addr) + return db; + db = db->next; + } + return NULL; +} + +/* Return the int data at address ADDR in dcache block DC. */ +int +dcache_value (db, addr) + struct dcache_block *db; + unsigned int addr; +{ + if (addr & 3) + abort (); + return (db->data[XFORM (addr)]); +} + +/* Get a free cache block, put or keep it on the valid list, + and return its address. The caller should store into the block + the address and data that it describes, then remque it from the + free list and insert it into the valid list. This procedure + prevents errors from creeping in if a ninMemGet is interrupted + (which used to put garbage blocks in the valid list...). */ +struct dcache_block * +dcache_alloc (dcache) + DCACHE *dcache; +{ + register struct dcache_block *db; + + if ((db = dcache->dcache_free.next) == &dcache->dcache_free) + { + /* If we can't get one from the free list, take last valid and put + it on the free list. */ + db = dcache->dcache_valid.last; + remque (db); + insque (db, &dcache->dcache_free); + } + + remque (db); + insque (db, &dcache->dcache_valid); + return (db); +} + +/* Return the contents of the word at address ADDR in the remote machine, + using the data cache. */ +int +dcache_fetch (dcache, addr) + DCACHE *dcache; + CORE_ADDR addr; +{ + register struct dcache_block *db; + + db = dcache_hit (dcache, addr); + if (db == 0) + { + db = dcache_alloc (dcache); + immediate_quit++; + (*dcache->read_memory) (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); + immediate_quit--; + db->addr = addr & ~LINE_SIZE_MASK; + remque (db); /* Off the free list */ + insque (db, &dcache->dcache_valid); /* On the valid list */ + } + return (dcache_value (db, addr)); +} + +/* Write the word at ADDR both in the data cache and in the remote machine. */ +void +dcache_poke (dcache, addr, data) + DCACHE *dcache; + CORE_ADDR addr; + int data; +{ + register struct dcache_block *db; + + /* First make sure the word is IN the cache. DB is its cache block. */ + db = dcache_hit (dcache, addr); + if (db == 0) + { + db = dcache_alloc (dcache); + immediate_quit++; + (*dcache->write_memory) (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); + immediate_quit--; + db->addr = addr & ~LINE_SIZE_MASK; + remque (db); /* Off the free list */ + insque (db, &dcache->dcache_valid); /* On the valid list */ + } + + /* Modify the word in the cache. */ + db->data[XFORM (addr)] = data; + + /* Send the changed word. */ + immediate_quit++; + (*dcache->write_memory) (addr, (unsigned char *) &data, 4); + immediate_quit--; +} + +/* Initialize the data cache. */ +DCACHE * +dcache_init (reading, writing) + memxferfunc reading; + memxferfunc writing; +{ + register i; + register struct dcache_block *db; + DCACHE *dcache; + + dcache = xmalloc(sizeof(*dcache)); + dcache->read_memory = reading; + dcache->write_memory = writing; + dcache->the_cache = xmalloc(sizeof(*dcache->the_cache) * DCACHE_SIZE); + + dcache->dcache_free.next = dcache->dcache_free.last = &dcache->dcache_free; + dcache->dcache_valid.next = dcache->dcache_valid.last = &dcache->dcache_valid; + for (db = dcache->the_cache, i = 0; i < DCACHE_SIZE; i++, db++) + insque (db, &dcache->dcache_free); + + return(dcache); +} + diff --git a/gdb/dcache.h b/gdb/dcache.h new file mode 100644 index 0000000..071ac6e --- /dev/null +++ b/gdb/dcache.h @@ -0,0 +1,67 @@ +/* Declarations for caching. Typically used by remote back ends for + caching remote memory. + + Copyright 1992, 1993 Free Software Foundation, Inc. + +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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#ifndef DCACHE_H +#define DCACHE_H + +#define LINE_SIZE_POWER (4) +/* eg 1<<3 == 8 */ +#define LINE_SIZE (1 << LINE_SIZE_POWER) +/* Number of cache blocks */ +#define DCACHE_SIZE (64) + +struct dcache_block +{ + struct dcache_block *next, *last; + unsigned int addr; /* Address for which data is recorded. */ + int data[LINE_SIZE / sizeof (int)]; +}; + +typedef int (*memxferfunc) PARAMS((CORE_ADDR memaddr, + unsigned char *myaddr, + int len)); + +typedef struct { + /* Function to actually read the target memory. */ + memxferfunc read_memory; + + /* Function to actually write the target memory */ + memxferfunc write_memory; + + /* free list */ + struct dcache_block dcache_free; + + /* in use list */ + struct dcache_block dcache_valid; + + /* The cache itself. */ + struct dcache_block *the_cache; + +} DCACHE; + +int dcache_fetch PARAMS((DCACHE *dcache, CORE_ADDR addr)); +void dcache_flush PARAMS((DCACHE *dcache)); +DCACHE *dcache_init PARAMS((memxferfunc reading, memxferfunc writing)); + +/* Write the word at ADDR both in the data cache and in the remote machine. */ +void dcache_poke PARAMS((DCACHE *dcache, CORE_ADDR addr, int data)); + +#endif /* DCACHE_H */ diff --git a/gdb/remote-bug.c b/gdb/remote-bug.c index 9cb0c39..f64ac34 100644 --- a/gdb/remote-bug.c +++ b/gdb/remote-bug.c @@ -38,9 +38,10 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "serial.h" #include "gdbcmd.h" +#include "dcache.h" + extern int sleep(); -extern int remque(); -extern int insque(); +extern int bcopy(); /* External data declarations */ extern int stop_soon_quietly; /* for wait_for_inferior */ @@ -49,26 +50,27 @@ extern int stop_soon_quietly; /* for wait_for_inferior */ extern struct target_ops bug_ops; /* Forward declaration */ /* Forward function declarations */ -static void bug_close (); -static int bug_clear_breakpoints (); -static void bug_write_cr(); - -#if __STDC__ == 1 -static int bug_read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len); -static int bug_write_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len); +static int bug_clear_breakpoints PARAMS((void)); +static void bug_close PARAMS((int quitting)); +static void bug_write_cr PARAMS((char *string)); -#else +static int bug_read_inferior_memory PARAMS((CORE_ADDR memaddr, + unsigned char *myaddr, + int len)); -static int bug_read_inferior_memory (); -static int bug_write_inferior_memory (); - -#endif /* not __STDC__ */ +static int bug_write_inferior_memory PARAMS((CORE_ADDR memaddr, + unsigned char *myaddr, + int len)); /* This is the serial descriptor to our target. */ static serial_t desc = NULL; +/* This is our data cache. */ + +static DCACHE *bug_dcache; + /* This variable is somewhat arbitrary. It's here so that it can be set from within a running gdb. */ @@ -110,176 +112,6 @@ static int srec_sleep = 0; static int srec_noise = 0; -/***********************************************************************/ -/* Caching stuff stolen from remote-nindy.c */ - -/* The data cache records all the data read from the remote machine - since the last time it stopped. - - Each cache block holds LINE_SIZE bytes of data - starting at a multiple-of-LINE_SIZE address. */ - -#define LINE_SIZE_POWER 4 -#define LINE_SIZE (1<<LINE_SIZE_POWER) /* eg 1<<3 == 8 */ -#define LINE_SIZE_MASK ((LINE_SIZE-1)) /* eg 7*2+1= 111*/ -#define DCACHE_SIZE 64 /* Number of cache blocks */ -#define XFORM(x) ((x&LINE_SIZE_MASK)>>2) -struct dcache_block - { - struct dcache_block *next, *last; - unsigned int addr; /* Address for which data is recorded. */ - int data[LINE_SIZE / sizeof (int)]; - }; - -struct dcache_block dcache_free, dcache_valid; - -/* Free all the data cache blocks, thus discarding all cached data. */ -static -void -dcache_flush () -{ - register struct dcache_block *db; - - while ((db = dcache_valid.next) != &dcache_valid) - { - remque (db); - insque (db, &dcache_free); - } -} - -/* - * If addr is present in the dcache, return the address of the block - * containing it. - */ -static -struct dcache_block * -dcache_hit (addr) - unsigned int addr; -{ - register struct dcache_block *db; - - if (addr & 3) - abort (); - - /* Search all cache blocks for one that is at this address. */ - db = dcache_valid.next; - while (db != &dcache_valid) - { - if ((addr & ~LINE_SIZE_MASK) == db->addr) - return db; - db = db->next; - } - return NULL; -} - -/* Return the int data at address ADDR in dcache block DC. */ -static -int -dcache_value (db, addr) - struct dcache_block *db; - unsigned int addr; -{ - if (addr & 3) - abort (); - return (db->data[XFORM (addr)]); -} - -/* Get a free cache block, put or keep it on the valid list, - and return its address. The caller should store into the block - the address and data that it describes, then remque it from the - free list and insert it into the valid list. This procedure - prevents errors from creeping in if a ninMemGet is interrupted - (which used to put garbage blocks in the valid list...). */ -static -struct dcache_block * -dcache_alloc () -{ - register struct dcache_block *db; - - if ((db = dcache_free.next) == &dcache_free) - { - /* If we can't get one from the free list, take last valid and put - it on the free list. */ - db = dcache_valid.last; - remque (db); - insque (db, &dcache_free); - } - - remque (db); - insque (db, &dcache_valid); - return (db); -} - -/* Return the contents of the word at address ADDR in the remote machine, - using the data cache. */ -static -int -dcache_fetch (addr) - CORE_ADDR addr; -{ - register struct dcache_block *db; - - db = dcache_hit (addr); - if (db == 0) - { - db = dcache_alloc (); - immediate_quit++; - bug_read_inferior_memory (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); - immediate_quit--; - db->addr = addr & ~LINE_SIZE_MASK; - remque (db); /* Off the free list */ - insque (db, &dcache_valid); /* On the valid list */ - } - return (dcache_value (db, addr)); -} - -/* Write the word at ADDR both in the data cache and in the remote machine. */ -static void -dcache_poke (addr, data) - CORE_ADDR addr; - int data; -{ - register struct dcache_block *db; - - /* First make sure the word is IN the cache. DB is its cache block. */ - db = dcache_hit (addr); - if (db == 0) - { - db = dcache_alloc (); - immediate_quit++; - bug_write_inferior_memory (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); - immediate_quit--; - db->addr = addr & ~LINE_SIZE_MASK; - remque (db); /* Off the free list */ - insque (db, &dcache_valid); /* On the valid list */ - } - - /* Modify the word in the cache. */ - db->data[XFORM (addr)] = data; - - /* Send the changed word. */ - immediate_quit++; - bug_write_inferior_memory (addr, (unsigned char *) &data, 4); - immediate_quit--; -} - -/* The cache itself. */ -struct dcache_block the_cache[DCACHE_SIZE]; - -/* Initialize the data cache. */ -static void -dcache_init () -{ - register i; - register struct dcache_block *db; - - db = the_cache; - dcache_free.next = dcache_free.last = &dcache_free; - dcache_valid.next = dcache_valid.last = &dcache_valid; - for (i = 0; i < DCACHE_SIZE; i++, db++) - insque (db, &dcache_free); -} - /*********************************************************************** * I/O stuff stolen from remote-eb.c ***********************************************************************/ @@ -489,7 +321,7 @@ bug_load (args, fromtty) check_open (); - dcache_flush (); + dcache_flush (bug_dcache); inferior_pid = 0; abfd = bfd_openr (args, 0); if (!abfd) @@ -616,7 +448,7 @@ bug_open (name, from_tty) SERIAL_RAW (desc); is_open = 1; - dcache_init (); + bug_dcache = dcache_init (bug_read_inferior_memory, bug_write_inferior_memory); /* Hello? Are you there? */ SERIAL_WRITE (desc, "\r", 1); @@ -666,7 +498,7 @@ void bug_resume (pid, step, sig) int pid, step, sig; { - dcache_flush (); + dcache_flush (bug_dcache); if (step) { @@ -1040,7 +872,7 @@ int bug_fetch_word (addr) CORE_ADDR addr; { - return dcache_fetch (addr); + return dcache_fetch (bug_dcache, addr); } /* Write a word WORD into remote address ADDR. @@ -1051,7 +883,7 @@ bug_store_word (addr, word) CORE_ADDR addr; int word; { - dcache_poke (addr, word); + dcache_poke (bug_dcache, addr, word); } int @@ -1312,7 +1144,7 @@ bug_files_info () static int bug_read_inferior_memory (memaddr, myaddr, len) CORE_ADDR memaddr; - char *myaddr; + unsigned char *myaddr; int len; { char request[100]; |