binutils-gdb/gdb/dcache.c

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/* Caching code. Typically used by remote back ends for
caching remote memory.
Copyright 1992, 1993, 1995 Free Software Foundation, Inc.
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This file is part of GDB.
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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.
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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.
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You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
#include "dcache.h"
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#include "gdbcmd.h"
* configure.in: Check for working mmap, ansi headers, string.h, strings.h, and memory.h. * configure: Regenerated. * gdb_stat.h: New file, "portable" <sys/stat.h>. * gdb_string.h: New file, "portable" <string.h>. * altos-xdep.c, arm-tdep.c, arm-xdep.c, convex-tdep.c, convex-xdep.c, coredep.c, cxux-nat.c, dbxread.c, exec.c, gould-xdep.c, hppa-tdep.c, i386aix-nat.c, i386b-nat.c, i386mach-nat.c, i386v-nat.c, infptrace.c, m88k-nat.c, main.c, mdebugread.c, objfiles.c, os9kread.c, procfs.c, pyr-xdep.c, rs6000-nat.c, source.c, standalone.c, stuff.c, sun386-nat.c, symfile.c, symm-nat.c, symm-tdep.c, symtab.c, top.c, ultra3-nat.c, ultra3-xdep.c, umax-xdep.c, xcoffread.c: Include "gdb_stat.h" instead of <sys/stat.h>. * alpha-tdep.c, breakpoint.c, buildsym.c, c-typeprint.c, ch-typeprint.c, coffread.c, command.c, core-sol2.c, core-svr4.c, core.c, corelow.c, cp-valprint.c, dbxread.c, dcache.c, demangle.c, dpx2-nat.c, dstread.c, dwarfread.c, elfread.c, environ.c, eval.c, exec.c, f-lang.c, f-typeprint.c, f-valprint.c, findvar.c, fork-child.c, gdbtypes.c, hpread.c, i386-tdep.c, infcmd.c, inflow.c, infptrace.c, infrun.c, irix5-nat.c, language.c, m2-typeprint.c, main.c, mdebugread.c, minsyms.c, mipsread.c, monitor.c, nlmread.c, objfiles.c, os9kread.c, osfsolib.c, parse.c, printcmd.c, procfs.c, regex.c, remote-adapt.c, remote-arc.c, remote-array.c, remote-bug.c, remote-e7000.c, remote-eb.c, remote-es.c, remote-hms.c, remote-mm.c, remote-os9k.c, remote-pa.c, remote-sim.c, remote-st.c, remote-udi.c, remote-utils.c, remote-vx.c, remote-vx29k.c, remote-vx68.c, remote-vx960.c, remote-vxmips.c, remote-vxsparc.c, remote.c, solib.c, somread.c, source.c, stabsread.c, stack.c, symfile.c, symmisc.c, symtab.c, target.c, top.c, typeprint.c, utils.c, valarith.c, valops.c, valprint.c, values.c, xcoffread.c: Include "gdb_string.h" instead of <string.h>. * gdbtk.c: Likewise. * config/xm-sysv4.h, i386/xm-ptx.h, m68k/xm-sun3os4.h, sparc/xm-sun4os4.h (HAVE_MMAP): Removed. * config/xm-lynx.h, config/i386/xm-ptx.h, config/m68k/nm-apollo68b.h, config/m68k/xm-hp300hpux.h, config/mips/xm-irix3.h, config/mips/xm-mips.h, config/mips/xm-news-mips.h, config/mips/xm-riscos.h, config/pa/hppah.h, config/rs6000/xm-rs6000.h, config/sparc/xm-sun4os4.h, config/sparc/xm-sun4sol2.h, config/vax/xm-vaxbsd.h, config/vax/xm-vaxult.h, config/vax/xm-vaxult2.h (MEM_FNS_DECLARED): Removed. * config/mips/xm-irix3.h, config/mips/xm-mips.h, config/pa/xm-hppah.h (memcpy, memset): Removed declarations.
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#include "gdb_string.h"
#include "gdbcore.h"
/*
The data cache could lead to incorrect results because it doesn't know
about volatile variables, thus making it impossible to debug
functions which use memory mapped I/O devices.
set remotecache 0
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In those cases.
In general the dcache speeds up performance, some speed improvement
comes from the actual caching mechanism, but the major gain is in
the reduction of the remote protocol overhead; instead of reading
or writing a large area of memory in 4 byte requests, the cache
bundles up the requests into 32 byte (actually LINE_SIZE) chunks.
Reducing the overhead to an eighth of what it was. This is very
obvious when displaying a large amount of data,
eg, x/200x 0
caching | no yes
----------------------------
first time | 4 sec 2 sec improvement due to chunking
second time | 4 sec 0 sec improvement due to caching
The cache structure is unusual, we keep a number of cache blocks
(DCACHE_SIZE) and each one caches a LINE_SIZEed area of memory.
Within each line we remember the address of the line (always a
multiple of the LINE_SIZE) and a vector of bytes over the range.
There's another vector which contains the state of the bytes.
ENTRY_BAD means that the byte is just plain wrong, and has no
correspondence with anything else (as it would when the cache is
turned on, but nothing has been done to it.
ENTRY_DIRTY means that the byte has some data in it which should be
written out to the remote target one day, but contains correct
data. ENTRY_OK means that the data is the same in the cache as it
is in remote memory.
The ENTRY_DIRTY state is necessary because GDB likes to write large
lumps of memory in small bits. If the caching mechanism didn't
maintain the DIRTY information, then something like a two byte
write would mean that the entire cache line would have to be read,
the two bytes modified and then written out again. The alternative
would be to not read in the cache line in the first place, and just
write the two bytes directly into target memory. The trouble with
that is that it really nails performance, because of the remote
protocol overhead. This way, all those little writes are bundled
up into an entire cache line write in one go, without having to
read the cache line in the first place.
*/
/* This value regulates the number of cache blocks stored.
Smaller values reduce the time spent searching for a cache
line, and reduce memory requirements, but increase the risk
of a line not being in memory */
#define DCACHE_SIZE 64
/* This value regulates the size of a cache line. Smaller values
reduce the time taken to read a single byte, but reduce overall
throughput. */
#define LINE_SIZE_POWER (5)
#define LINE_SIZE (1 << LINE_SIZE_POWER)
/* Each cache block holds LINE_SIZE bytes of data
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starting at a multiple-of-LINE_SIZE address. */
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#define LINE_SIZE_MASK ((LINE_SIZE - 1))
#define XFORM(x) ((x) & LINE_SIZE_MASK)
#define MASK(x) ((x) & ~LINE_SIZE_MASK)
#define ENTRY_BAD 0 /* data at this byte is wrong */
#define ENTRY_DIRTY 1 /* data at this byte needs to be written back */
#define ENTRY_OK 2 /* data at this byte is same as in memory */
struct dcache_block
{
struct dcache_block *p; /* next in list */
Changes from: David Mosberger-Tang <davidm@azstarnet.com> * NEWS: Add Alpha Linux as a new native configuration. * mdebugread.c (parse_symbol): When we find a malloc() symbol with return type VOID, assume no debugging info is available for that object file and patch the return value into VOID *. Otherwise, operations requiring an implicit call to malloc() will fail. * infrun.c (wait_for_inferior): The criterion to detect entering a sigtramp handler is now: (a) the current pc is inside a sigtramp handler, (b) the previous pc is not in a sigtramp handler, and (c) the current stack pointer is "inner" than the old one. Condition (c) is new to avoid mistaking a return from a signal handler into sigtramp as a new sigtramp invocation. * dcache.c (struct dcache_block): Declare addr as CORE_ADDR. An int may not be big enough to hold an address. (dcache_hit): Ditto. (dcache_peek_byte): Fix indentation. * configure.in (alpha-*-linux*): Add target. * configure: Rebuild * config/alpha/tm-alpha.h (PROC_DESC_IS_DYN_SIGTRAMP): New macro. (SET_PROC_DESC_IS_DYN_SIGTRAMP): Ditto. (DYNAMIC_SIGTRAMP_OFFSET): Ditto. (SIGCONTEXT_ADDR): Ditto. (FRAME_PAST_SIGTRAMP_FRAME): Ditto. * config/alpha/alpha-linux.mh: New file. * config/alpha/alpha-linux.mt: Ditto. * config/alpha/nm-linux.h: Ditto. * config/alpha/tm-alphalinux.h: Ditto. * config/alpha/xm-alphalinux.h: Ditto. * config/alpha/xm-alphaosf.h: Renamed from xm-alpha.h. * config/alpha/alpha-osf1.mh (XM_FILE): Change from xm-alpha.h to xm-alphaosf.h. * config/alpha/alpha-osf2.mh: Ditto. * blockframe.c (find_pc_partial_function): Pass PC to SIGTRAMP_START and SIGTRAMP_END macros for the benefit of systems that detect sigtramp code via designated code sequences (as is the case for Linux/Alpha, for example). * config/i386/tm-i386bsd.h: Change SIGTRAMP_START and SIGTRAMP_END to ignore new PC argument. * config/m68k/tm-hp300bsd.h: Ditto. * config/vax/tm-vax.h: Ditto. * alpha-tdep.c (alpha_linux_sigtramp_offset): New function. (alpha_osf_skip_sigtramp_frame): Ditto. (push_sigtramp_desc): Ditto. (alpha_find_saved_regs): Use SIGCONTEXT_ADDR macro to extract sigcontext address from frame. (alpha_saved_pc_after_call): When in sigtramp, use alpha_frame_saved_pc() instead of read-register(). (after_prologue): When inside a dynamically generated sigtramp function, there is no prologue, so return address of first instruction. (alpha_in_prologue): Fix typo in comment. (find_proc_desc): Use macro DYNAMIC_SIGTRAMP_OFFSET to determine whether we're inside a dynamicaly generated sigtramp function. If so, create and push and appropriate procedure descriptor. (alpha_frame_chain): Use macro FRAME_PAST_SIGTRAMP_FRAME to obtain the frame past a sigtramp frame (if the current frame is indeed a sigtramp function). (init_extra_frame_info): Don't read next frame register off of stack-pointer when inside a dynamiccaly generated sigtramp. (alpha_pop_frame): Also unlink and destroy procedure descriptors created for dynamically generated sigtramp functions. * alpha-nat.c: When compiling under Linux, include <asm/reg.h> and <alpha/ptrace.h> instead of <machine/reg.h>
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CORE_ADDR addr; /* Address for which data is recorded. */
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
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char data[LINE_SIZE]; /* bytes at given address */
unsigned char state[LINE_SIZE]; /* what state the data is in */
/* whether anything in state is dirty - used to speed up the
dirty scan. */
int anydirty;
int refs;
};
struct dcache_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 *free_head;
struct dcache_block *free_tail;
/* in use list */
struct dcache_block *valid_head;
struct dcache_block *valid_tail;
/* The cache itself. */
struct dcache_block *the_cache;
/* potentially, if the cache was enabled, and then turned off, and
then turned on again, the stuff in it could be stale, so this is
used to mark it */
int cache_has_stuff;
} ;
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
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static int
dcache_poke_byte PARAMS ((DCACHE *dcache, CORE_ADDR addr, char *ptr));
static int
dcache_peek_byte PARAMS ((DCACHE *dcache, CORE_ADDR addr, char *ptr));
static struct dcache_block *
Changes from: David Mosberger-Tang <davidm@azstarnet.com> * NEWS: Add Alpha Linux as a new native configuration. * mdebugread.c (parse_symbol): When we find a malloc() symbol with return type VOID, assume no debugging info is available for that object file and patch the return value into VOID *. Otherwise, operations requiring an implicit call to malloc() will fail. * infrun.c (wait_for_inferior): The criterion to detect entering a sigtramp handler is now: (a) the current pc is inside a sigtramp handler, (b) the previous pc is not in a sigtramp handler, and (c) the current stack pointer is "inner" than the old one. Condition (c) is new to avoid mistaking a return from a signal handler into sigtramp as a new sigtramp invocation. * dcache.c (struct dcache_block): Declare addr as CORE_ADDR. An int may not be big enough to hold an address. (dcache_hit): Ditto. (dcache_peek_byte): Fix indentation. * configure.in (alpha-*-linux*): Add target. * configure: Rebuild * config/alpha/tm-alpha.h (PROC_DESC_IS_DYN_SIGTRAMP): New macro. (SET_PROC_DESC_IS_DYN_SIGTRAMP): Ditto. (DYNAMIC_SIGTRAMP_OFFSET): Ditto. (SIGCONTEXT_ADDR): Ditto. (FRAME_PAST_SIGTRAMP_FRAME): Ditto. * config/alpha/alpha-linux.mh: New file. * config/alpha/alpha-linux.mt: Ditto. * config/alpha/nm-linux.h: Ditto. * config/alpha/tm-alphalinux.h: Ditto. * config/alpha/xm-alphalinux.h: Ditto. * config/alpha/xm-alphaosf.h: Renamed from xm-alpha.h. * config/alpha/alpha-osf1.mh (XM_FILE): Change from xm-alpha.h to xm-alphaosf.h. * config/alpha/alpha-osf2.mh: Ditto. * blockframe.c (find_pc_partial_function): Pass PC to SIGTRAMP_START and SIGTRAMP_END macros for the benefit of systems that detect sigtramp code via designated code sequences (as is the case for Linux/Alpha, for example). * config/i386/tm-i386bsd.h: Change SIGTRAMP_START and SIGTRAMP_END to ignore new PC argument. * config/m68k/tm-hp300bsd.h: Ditto. * config/vax/tm-vax.h: Ditto. * alpha-tdep.c (alpha_linux_sigtramp_offset): New function. (alpha_osf_skip_sigtramp_frame): Ditto. (push_sigtramp_desc): Ditto. (alpha_find_saved_regs): Use SIGCONTEXT_ADDR macro to extract sigcontext address from frame. (alpha_saved_pc_after_call): When in sigtramp, use alpha_frame_saved_pc() instead of read-register(). (after_prologue): When inside a dynamically generated sigtramp function, there is no prologue, so return address of first instruction. (alpha_in_prologue): Fix typo in comment. (find_proc_desc): Use macro DYNAMIC_SIGTRAMP_OFFSET to determine whether we're inside a dynamicaly generated sigtramp function. If so, create and push and appropriate procedure descriptor. (alpha_frame_chain): Use macro FRAME_PAST_SIGTRAMP_FRAME to obtain the frame past a sigtramp frame (if the current frame is indeed a sigtramp function). (init_extra_frame_info): Don't read next frame register off of stack-pointer when inside a dynamiccaly generated sigtramp. (alpha_pop_frame): Also unlink and destroy procedure descriptors created for dynamically generated sigtramp functions. * alpha-nat.c: When compiling under Linux, include <asm/reg.h> and <alpha/ptrace.h> instead of <machine/reg.h>
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dcache_hit PARAMS ((DCACHE *dcache, CORE_ADDR addr));
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
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static int dcache_write_line PARAMS ((DCACHE *dcache,struct dcache_block *db));
static struct dcache_block *dcache_alloc PARAMS ((DCACHE *dcache));
static int dcache_writeback PARAMS ((DCACHE *dcache));
static void dcache_info PARAMS ((char *exp, int tty));
int remote_dcache = 0;
DCACHE *last_cache; /* Used by info dcache */
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/* Free all the data cache blocks, thus discarding all cached data. */
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void
dcache_flush (dcache)
DCACHE *dcache;
{
int i;
dcache->valid_head = 0;
dcache->valid_tail = 0;
dcache->free_head = 0;
dcache->free_tail = 0;
for (i = 0; i < DCACHE_SIZE; i++)
{
struct dcache_block *db = dcache->the_cache + i;
if (!dcache->free_head)
dcache->free_head = db;
else
dcache->free_tail->p = db;
dcache->free_tail = db;
db->p = 0;
}
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dcache->cache_has_stuff = 0;
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return;
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}
/* If addr is present in the dcache, return the address of the block
containing it. */
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
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static struct dcache_block *
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dcache_hit (dcache, addr)
DCACHE *dcache;
Changes from: David Mosberger-Tang <davidm@azstarnet.com> * NEWS: Add Alpha Linux as a new native configuration. * mdebugread.c (parse_symbol): When we find a malloc() symbol with return type VOID, assume no debugging info is available for that object file and patch the return value into VOID *. Otherwise, operations requiring an implicit call to malloc() will fail. * infrun.c (wait_for_inferior): The criterion to detect entering a sigtramp handler is now: (a) the current pc is inside a sigtramp handler, (b) the previous pc is not in a sigtramp handler, and (c) the current stack pointer is "inner" than the old one. Condition (c) is new to avoid mistaking a return from a signal handler into sigtramp as a new sigtramp invocation. * dcache.c (struct dcache_block): Declare addr as CORE_ADDR. An int may not be big enough to hold an address. (dcache_hit): Ditto. (dcache_peek_byte): Fix indentation. * configure.in (alpha-*-linux*): Add target. * configure: Rebuild * config/alpha/tm-alpha.h (PROC_DESC_IS_DYN_SIGTRAMP): New macro. (SET_PROC_DESC_IS_DYN_SIGTRAMP): Ditto. (DYNAMIC_SIGTRAMP_OFFSET): Ditto. (SIGCONTEXT_ADDR): Ditto. (FRAME_PAST_SIGTRAMP_FRAME): Ditto. * config/alpha/alpha-linux.mh: New file. * config/alpha/alpha-linux.mt: Ditto. * config/alpha/nm-linux.h: Ditto. * config/alpha/tm-alphalinux.h: Ditto. * config/alpha/xm-alphalinux.h: Ditto. * config/alpha/xm-alphaosf.h: Renamed from xm-alpha.h. * config/alpha/alpha-osf1.mh (XM_FILE): Change from xm-alpha.h to xm-alphaosf.h. * config/alpha/alpha-osf2.mh: Ditto. * blockframe.c (find_pc_partial_function): Pass PC to SIGTRAMP_START and SIGTRAMP_END macros for the benefit of systems that detect sigtramp code via designated code sequences (as is the case for Linux/Alpha, for example). * config/i386/tm-i386bsd.h: Change SIGTRAMP_START and SIGTRAMP_END to ignore new PC argument. * config/m68k/tm-hp300bsd.h: Ditto. * config/vax/tm-vax.h: Ditto. * alpha-tdep.c (alpha_linux_sigtramp_offset): New function. (alpha_osf_skip_sigtramp_frame): Ditto. (push_sigtramp_desc): Ditto. (alpha_find_saved_regs): Use SIGCONTEXT_ADDR macro to extract sigcontext address from frame. (alpha_saved_pc_after_call): When in sigtramp, use alpha_frame_saved_pc() instead of read-register(). (after_prologue): When inside a dynamically generated sigtramp function, there is no prologue, so return address of first instruction. (alpha_in_prologue): Fix typo in comment. (find_proc_desc): Use macro DYNAMIC_SIGTRAMP_OFFSET to determine whether we're inside a dynamicaly generated sigtramp function. If so, create and push and appropriate procedure descriptor. (alpha_frame_chain): Use macro FRAME_PAST_SIGTRAMP_FRAME to obtain the frame past a sigtramp frame (if the current frame is indeed a sigtramp function). (init_extra_frame_info): Don't read next frame register off of stack-pointer when inside a dynamiccaly generated sigtramp. (alpha_pop_frame): Also unlink and destroy procedure descriptors created for dynamically generated sigtramp functions. * alpha-nat.c: When compiling under Linux, include <asm/reg.h> and <alpha/ptrace.h> instead of <machine/reg.h>
1996-05-26 23:41:40 +02:00
CORE_ADDR addr;
1993-09-01 00:13:29 +02:00
{
register struct dcache_block *db;
/* Search all cache blocks for one that is at this address. */
db = dcache->valid_head;
while (db)
1993-09-01 00:13:29 +02:00
{
if (MASK(addr) == db->addr)
{
db->refs++;
return db;
}
db = db->p;
1993-09-01 00:13:29 +02:00
}
1993-09-01 02:43:09 +02:00
1993-09-01 00:13:29 +02:00
return NULL;
}
/* Make sure that anything in this line which needs to
be written is. */
static int
dcache_write_line (dcache, db)
DCACHE *dcache;
register struct dcache_block *db;
1993-09-01 00:13:29 +02:00
{
int s;
int e;
s = 0;
if (db->anydirty)
{
for (s = 0; s < LINE_SIZE; s++)
{
if (db->state[s] == ENTRY_DIRTY)
{
int len = 0;
for (e = s ; e < LINE_SIZE; e++, len++)
if (db->state[e] != ENTRY_DIRTY)
break;
{
/* all bytes from s..s+len-1 need to
be written out */
int done = 0;
while (done < len) {
int t = dcache->write_memory (db->addr + s + done,
db->data + s + done,
len - done);
if (t == 0)
return 0;
done += t;
}
memset (db->state + s, ENTRY_OK, len);
s = e;
}
}
}
db->anydirty = 0;
}
return 1;
1993-09-01 00:13:29 +02:00
}
1993-09-01 00:13:29 +02:00
/* 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
1993-09-01 00:26:48 +02:00
prevents errors from creeping in if a memory retrieval is
interrupted (which used to put garbage blocks in the valid
list...). */
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
1996-04-11 23:17:45 +02:00
static struct dcache_block *
1993-09-01 00:13:29 +02:00
dcache_alloc (dcache)
DCACHE *dcache;
{
register struct dcache_block *db;
1993-09-01 02:43:09 +02:00
if (remote_dcache == 0)
abort ();
1993-09-01 02:43:09 +02:00
/* Take something from the free list */
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
1995-07-18 06:38:06 +02:00
db = dcache->free_head;
if (db)
1993-09-01 00:13:29 +02:00
{
dcache->free_head = db->p;
}
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
1995-07-18 06:38:06 +02:00
else
{
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
1995-07-18 06:38:06 +02:00
/* Nothing left on free list, so grab one from the valid list */
db = dcache->valid_head;
dcache->valid_head = db->p;
dcache_write_line (dcache, db);
1993-09-01 00:13:29 +02:00
}
/* append this line to end of valid list */
if (!dcache->valid_head)
dcache->valid_head = db;
else
dcache->valid_tail->p = db;
dcache->valid_tail = db;
db->p = 0;
return db;
1993-09-01 00:13:29 +02:00
}
/* Using the data cache DCACHE return the contents of the byte at
address ADDR in the remote machine.
Returns 0 on error. */
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
1996-04-11 23:17:45 +02:00
static int
dcache_peek_byte (dcache, addr, ptr)
1993-09-01 00:13:29 +02:00
DCACHE *dcache;
CORE_ADDR addr;
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
1995-07-18 06:38:06 +02:00
char *ptr;
1993-09-01 00:13:29 +02:00
{
register struct dcache_block *db = dcache_hit (dcache, addr);
int ok=1;
int done = 0;
if (db == 0
|| db->state[XFORM (addr)] == ENTRY_BAD)
1993-09-01 00:13:29 +02:00
{
if (db)
{
dcache_write_line (dcache, db);
}
else
1993-09-01 00:13:29 +02:00
db = dcache_alloc (dcache);
immediate_quit++;
Changes from: David Mosberger-Tang <davidm@azstarnet.com> * NEWS: Add Alpha Linux as a new native configuration. * mdebugread.c (parse_symbol): When we find a malloc() symbol with return type VOID, assume no debugging info is available for that object file and patch the return value into VOID *. Otherwise, operations requiring an implicit call to malloc() will fail. * infrun.c (wait_for_inferior): The criterion to detect entering a sigtramp handler is now: (a) the current pc is inside a sigtramp handler, (b) the previous pc is not in a sigtramp handler, and (c) the current stack pointer is "inner" than the old one. Condition (c) is new to avoid mistaking a return from a signal handler into sigtramp as a new sigtramp invocation. * dcache.c (struct dcache_block): Declare addr as CORE_ADDR. An int may not be big enough to hold an address. (dcache_hit): Ditto. (dcache_peek_byte): Fix indentation. * configure.in (alpha-*-linux*): Add target. * configure: Rebuild * config/alpha/tm-alpha.h (PROC_DESC_IS_DYN_SIGTRAMP): New macro. (SET_PROC_DESC_IS_DYN_SIGTRAMP): Ditto. (DYNAMIC_SIGTRAMP_OFFSET): Ditto. (SIGCONTEXT_ADDR): Ditto. (FRAME_PAST_SIGTRAMP_FRAME): Ditto. * config/alpha/alpha-linux.mh: New file. * config/alpha/alpha-linux.mt: Ditto. * config/alpha/nm-linux.h: Ditto. * config/alpha/tm-alphalinux.h: Ditto. * config/alpha/xm-alphalinux.h: Ditto. * config/alpha/xm-alphaosf.h: Renamed from xm-alpha.h. * config/alpha/alpha-osf1.mh (XM_FILE): Change from xm-alpha.h to xm-alphaosf.h. * config/alpha/alpha-osf2.mh: Ditto. * blockframe.c (find_pc_partial_function): Pass PC to SIGTRAMP_START and SIGTRAMP_END macros for the benefit of systems that detect sigtramp code via designated code sequences (as is the case for Linux/Alpha, for example). * config/i386/tm-i386bsd.h: Change SIGTRAMP_START and SIGTRAMP_END to ignore new PC argument. * config/m68k/tm-hp300bsd.h: Ditto. * config/vax/tm-vax.h: Ditto. * alpha-tdep.c (alpha_linux_sigtramp_offset): New function. (alpha_osf_skip_sigtramp_frame): Ditto. (push_sigtramp_desc): Ditto. (alpha_find_saved_regs): Use SIGCONTEXT_ADDR macro to extract sigcontext address from frame. (alpha_saved_pc_after_call): When in sigtramp, use alpha_frame_saved_pc() instead of read-register(). (after_prologue): When inside a dynamically generated sigtramp function, there is no prologue, so return address of first instruction. (alpha_in_prologue): Fix typo in comment. (find_proc_desc): Use macro DYNAMIC_SIGTRAMP_OFFSET to determine whether we're inside a dynamicaly generated sigtramp function. If so, create and push and appropriate procedure descriptor. (alpha_frame_chain): Use macro FRAME_PAST_SIGTRAMP_FRAME to obtain the frame past a sigtramp frame (if the current frame is indeed a sigtramp function). (init_extra_frame_info): Don't read next frame register off of stack-pointer when inside a dynamiccaly generated sigtramp. (alpha_pop_frame): Also unlink and destroy procedure descriptors created for dynamically generated sigtramp functions. * alpha-nat.c: When compiling under Linux, include <asm/reg.h> and <alpha/ptrace.h> instead of <machine/reg.h>
1996-05-26 23:41:40 +02:00
db->addr = MASK (addr);
while (done < LINE_SIZE)
{
int try =
(*dcache->read_memory)
(db->addr + done,
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
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db->data + done,
LINE_SIZE - done);
if (try == 0)
return 0;
done += try;
}
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immediate_quit--;
memset (db->state, ENTRY_OK, sizeof (db->data));
db->anydirty = 0;
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}
*ptr = db->data[XFORM (addr)];
return ok;
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}
/* Writeback any dirty lines to the remote. */
static int
dcache_writeback (dcache)
DCACHE *dcache;
{
struct dcache_block *db;
db = dcache->valid_head;
while (db)
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{
if (!dcache_write_line (dcache, db))
return 0;
db = db->p;
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}
return 1;
}
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/* Using the data cache DCACHE return the contents of the word at
address ADDR in the remote machine. */
int
dcache_fetch (dcache, addr)
DCACHE *dcache;
CORE_ADDR addr;
{
int res;
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
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if (dcache_xfer_memory (dcache, addr, (char *)&res, sizeof res, 0) != sizeof res)
memory_error (EIO, addr);
return res;
}
/* Write the byte at PTR into ADDR in the data cache.
Return zero on write error.
*/
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
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static int
dcache_poke_byte (dcache, addr, ptr)
DCACHE *dcache;
CORE_ADDR addr;
char *ptr;
{
register struct dcache_block *db = dcache_hit (dcache, addr);
if (!db)
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{
db = dcache_alloc (dcache);
db->addr = MASK (addr);
memset (db->state, ENTRY_BAD, sizeof (db->data));
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}
db->data[XFORM (addr)] = *ptr;
db->state[XFORM (addr)] = ENTRY_DIRTY;
db->anydirty = 1;
return 1;
}
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/* Write the word at ADDR both in the data cache and in the remote machine.
Return zero on write error.
*/
int
dcache_poke (dcache, addr, data)
DCACHE *dcache;
CORE_ADDR addr;
int data;
{
* dcache.c: Add prototypes. Make many functions static. * (dcache_peek dcache_fetch dcache_poke): Make dcache_fetch and dcache_poke call dcache_xfer_memory directly in order to fix problems with turning off dcache. dcache_peek is now unnecessary, so it goes away. * defs.h: Define new macros HOST_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT and TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT to specify a pointer to a struct floatformat. This allows for better handling of targets whose floating point formats differ from the host by more than just byte order. * (floatformat_to_long_double floatformat_from_long_double): Prototypes for new functions in utils.c. * (floatformat_to_doublest floatformat_from_doublest): Prototypes for pointers to floating point conversion functions. The actual function uses either double or long double if the host supports it. * findvar.c (floatformat_to_doublest floatformat_from_doublest): Initialize to point at correct function depending on HAVE_LONG_DOUBLE. * (extract_floating store_floating): Rewrite. Now, if host fp format is the same as the target, we just do a copy. Otherwise, we call floatformat_{to from}_doublest. * remote-nindy.c (nindy_xfer_inferior_memory): Change param `write' to `should_write'. * utils.c (floatformat_to_long_double floatformat_from_long_double): New routines that implement long double versions of functions in libiberty/floatformat.c. * config/i960/tm-i960.h (TARGET_LONG_DOUBLE_FORMAT): Define this for i960 extended real (80 bit) numbers. * nindy-share/nindy.c (ninMemGet ninMemPut): Return number of bytes actually read or written.
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if (dcache_xfer_memory (dcache, addr, (char *)&data, sizeof data, 1) != sizeof data)
return 0;
return dcache_writeback (dcache);
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}
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/* Initialize the data cache. */
DCACHE *
dcache_init (reading, writing)
memxferfunc reading;
memxferfunc writing;
{
int csize = sizeof (struct dcache_block) * DCACHE_SIZE;
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DCACHE *dcache;
dcache = (DCACHE *) xmalloc (sizeof (*dcache));
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dcache->read_memory = reading;
dcache->write_memory = writing;
dcache->the_cache = (struct dcache_block *) xmalloc (csize);
memset (dcache->the_cache, 0, csize);
dcache_flush (dcache);
last_cache = dcache;
return dcache;
}
/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is
nonzero.
Returns length of data written or read; 0 for error.
This routine is indended to be called by remote_xfer_ functions. */
int
dcache_xfer_memory (dcache, memaddr, myaddr, len, should_write)
DCACHE *dcache;
CORE_ADDR memaddr;
char *myaddr;
int len;
int should_write;
{
int i;
if (remote_dcache)
{
int (*xfunc) PARAMS ((DCACHE *dcache, CORE_ADDR addr, char *ptr));
xfunc = should_write ? dcache_poke_byte : dcache_peek_byte;
for (i = 0; i < len; i++)
{
if (!xfunc (dcache, memaddr + i, myaddr + i))
return 0;
}
dcache->cache_has_stuff = 1;
dcache_writeback (dcache);
}
else
{
memxferfunc xfunc;
xfunc = should_write ? dcache->write_memory : dcache->read_memory;
if (dcache->cache_has_stuff)
dcache_flush (dcache);
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len = xfunc (memaddr, myaddr, len);
}
return len;
}
static void
dcache_info (exp, tty)
char *exp;
int tty;
{
struct dcache_block *p;
if (!remote_dcache)
{
printf_filtered ("Dcache not enabled\n");
return;
}
printf_filtered ("Dcache enabled, line width %d, depth %d\n",
LINE_SIZE, DCACHE_SIZE);
printf_filtered ("Cache state:\n");
for (p = last_cache->valid_head; p; p = p->p)
{
int j;
printf_filtered ("Line at %08xd, referenced %d times\n",
p->addr, p->refs);
for (j = 0; j < LINE_SIZE; j++)
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
1995-07-18 06:38:06 +02:00
printf_filtered ("%02x", p->data[j] & 0xFF);
printf_filtered ("\n");
for (j = 0; j < LINE_SIZE; j++)
* dache.c (struct dcache_block): Change data member from unsigned char to char, since everything passed in and out of dcache is char or casted to appropriate type anyway. (dcache_alloc): Move assignment of db out of test and combine separate tests into if-else. (dcache_peek_byte): Change ptr from unsigned char* to char*. (dcache_peek_byte): Remove now unnecessary cast in read_memory call. (dcache_peek): Change cast of incoming data arg. (dcache_poke): Change cast of addr of incoming data arg. (dcache_info): Mask data passed to printf_filtered to lsbyte only. (dcache_info): Change printf_filtered arg from "% 2x" to " %2x". * target.c (debug_to_thread_alive): Change return type to int and return zero, for type compatibility with other *_thread_alive funcs. (cleanup_target): Change cast of ignore function to match type of the to_thread_alive member. * defs.h (error_hook): Add ATTR_NORETURN. * defs.h (NORETURN, ATTR_NORETURN): Switch from volatile to __attribute__ method with gcc 2.7, to avoid gcc 2.6.3 bug. * remote.c (remote_wait): Cast first arg to strtol, strchr, and strncmp to "const char *" from "unsigned char *". (remote_wait): Cast arg to putpkt and strcpy from "unsigned char *" to "char *". (remote_wait): Change printf format for long arg from "%d" to "%ld". (getpkt): Remove unused variable "bp". (remote_fetch_word, remote_store_word): Ifdef out apparently unused functions. * breakpoint.c (watchpoint_check): Removed unused variables "saved_level" and "saved_frame". * valops.c (value_arg_coerce): Add other enum TYPE_CODE_* and default cases to switch for completeness. * infrun.c (wait_for_inferior): Enclose "have_waited" label in #ifdef that matches the one in which it is referenced. * ser-unix.c (hardwire_noflush_set_tty_state): Enclose otherwise unused variable "state" in #ifdef that matches one in which it is referenced. * eval.c (evaluate_subexp_standard): Remove unused variable "var". * eval.c (evaluate_subexp_standard): Remove unused variable "tmp_symbol". * valarith.c (value_subscript): Remove unused variable "lowerbound", which is redeclared in a nested scope prior to use. * printcmd.c (print_frame_nameless_args): Use "%ld" to print long arg, not "%d". * {mem-break.c, remote-pa.c, remote.c, saber.suppress}: Remove unused static var "check_break_insn_size". * buildsym.c (finish_block): Add other enum LOC_* and default cases to switch for completeness. ch-lang.c (type_lower_upper): Removed unused label "retry". Add other enum TYPE_* and default cases to switch for completeness. * f-typeprint.c (f_type_print_args): Ifdef out unused function that may be used someday when Fortran support is complete. * ch-valprint.c (chill_print_type_scalar): Add other enum TYPE_* and default cases to switch for completeness. (chill_val_print): Remove unused local var "high_bound" that is redeclared in a nested scope prior to use. (chill_var_print): Use "%ld" to print long arg, not "%d". * regex.c (re_compile_fastmap, re_match_2): Add remaining enum types and default to switches for completeness. * minsyms.c (lookup_minimal_symbol_text): Delete unused variable "trampoline_symbol". (prim_record_minimal_symbol_and_info): Return NULL rather than trash. * elfread.c (elf_symtab_read): Don't dereference NULL returns from record_minimal_symbol_and_info. * f-lang.c (saved_function_list_end): Ifdef out unused variable that may be used someday. * f-valprint.c (f_val_print): Remove unused local variable "straddr".
1995-07-18 06:38:06 +02:00
printf_filtered (" %2x", p->state[j]);
printf_filtered ("\n");
}
1993-09-01 00:13:29 +02:00
}
1993-09-01 02:43:09 +02:00
void
_initialize_dcache ()
1993-09-01 02:43:09 +02:00
{
add_show_from_set
(add_set_cmd ("remotecache", class_support, var_boolean,
(char *) &remote_dcache,
"\
Set cache use for remote targets.\n\
When on, use data caching for remote targets. For many remote targets\n\
this option can offer better throughput for reading target memory.\n\
Unfortunately, gdb does not currently know anything about volatile\n\
registers and thus data caching will produce incorrect results with\n\
volatile registers are in use. By default, this option is on.",
1993-09-01 02:43:09 +02:00
&setlist),
&showlist);
add_info ("dcache", dcache_info,
"Print information on the dcache performance.");
1993-09-01 02:43:09 +02:00
}