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/* GX target-independent functions for block translation.
Copyright (C) 1998 Cygnus Solutions. */
#include "sim-main.h"
#include "sim-assert.h"
#include "sim-gx.h"
#include "config.h"
/* shared object functions */
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#error "need dlfcn.h"
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#else
#error "need errno.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include "bfd.h"
/* Load the object file with given gx block. Return pointer to GX
function or NULL on failure. */
sim_gx_function
sim_gx_compiled_block_f(sim_gx_compiled_block* gx)
{
sim_gx_function f = gx->function_dlhandle;
SIM_DESC sd = current_state;
int rc;
if(f == NULL)
{
/* load object */
if(gx->object_dlhandle == NULL && gx->object_name != NULL)
{
gx->object_dlhandle = dlopen(gx->object_name, RTLD_NOW);
if(gx->object_dlhandle == NULL)
{
sim_io_error(sd, "Load error for GX object %s: %s",
gx->object_name,
dlerror());
}
}
/* locate function */
if(gx->function_dlhandle == NULL && gx->object_dlhandle != NULL && gx->symbol_name != NULL)
{
f = gx->function_dlhandle = dlsym(gx->object_dlhandle, gx->symbol_name);
if(f == NULL)
{
sim_io_error(sd, "Resolve error for GX object %s symbol %s: %s",
gx->object_name,
gx->symbol_name,
dlerror());
}
}
} /* f == NULL */
return f;
}
/* Forget about given GX block. Remove its source/object; unload it
from memory. */
void
sim_gx_compiled_block_dispose(sim_gx_compiled_block* gx)
{
SIM_DESC sd = current_state;
int rc;
char compile_command[2000];
char la_name[2000];
/* forget dl information */
gx->function_dlhandle = NULL;
/* unload shared library */
if(gx->object_dlhandle != NULL)
{
rc = dlclose(gx->object_dlhandle);
if(rc != 0)
{
sim_io_error(sd, "dlclose() error for GX object %s: %s",
gx->object_name,
dlerror());
}
gx->object_dlhandle = NULL;
}
/* uninstall shared object */
strcpy(la_name, gx->object_name);
strcpy(strstr(la_name, ".so.0"), ".la");
sprintf(compile_command, "gxtool --silent --mode=uninstall rm -f %s", la_name);
rc = system(compile_command);
if(rc != 0)
{
sim_io_error(sd, "Error during finish: `%s' rc %d",
compile_command, rc);
}
/* erase source */
/* sprintf(compile_command, "rm -f %s", block->source_name); */
/* final gasps */
zfree(gx->source_name);
zfree(gx->object_name);
zfree(gx->symbol_name);
zfree(gx);
}
/* Translate a piece of the code segment around given PC, in given mode. */
sim_gx_block*
sim_gx_block_create(sim_cia cia)
{
sim_gx_block* block;
/* allocate emtpy block */
block = zalloc(sizeof(sim_gx_block));
/* initialize block bounds, callback struct etc. */
tgx_block_ctor(block, cia);
/* create learning mode translation */
sim_gx_block_translate(block, 0 /* learning mode */);
/* add block to block list */
sim_gx_block_add(block);
return block;
}
/* Write the current block list to the state file */
void
sim_gx_write_block_list()
{
int i;
SIM_DESC sd = current_state;
sim_gx_block_list* blocks = STATE_BLOCKS(sd);
FILE* f;
char state_file_name[PATH_MAX];
char *exec_name;
/* get base of executable name */
exec_name = bfd_get_filename(STATE_PROG_BFD(sd));
if(strrchr(exec_name, '/') != NULL)
exec_name = strrchr(exec_name, '/') + 1;
/* generate base name */
sprintf(state_file_name, "%s/%s.gx",
GX_DIR,
exec_name);
f = fopen(state_file_name, "w");
if(f == NULL)
{
sim_io_error(sd, "Error: cannot write to state file %s, errno %d",
state_file_name, errno);
}
fprintf(f, "# This file was automatically generated. Do not edit.\n");
/* write block descriptors into state file */
for(i=0; i<blocks->gx_blocks_used; i++)
{
sim_gx_block* gx = blocks->gx_blocks[i];
sim_gx_compiled_block* block;
int j;
int age;
age = time(NULL) - gx->learn_last_change; /* store interval */
fprintf(f, "BLOCK 0x%lx 0x%lx %u %u\n", gx->origin, gx->length, gx->divisor, age);
fprintf(f, "FLAGS ");
for(j=0; j<GX_PC_FLAGS_INDEX(gx, gx->origin + gx->length); j++)
{
fprintf(f, "%2x ", gx->pc_flags[j]);
}
fprintf(f, "\n");
/* write learning mode names */
block = gx->learning_block;
fprintf(f, "LEARNING %s %s %s %lu %u\n",
block->source_name, block->object_name, block->symbol_name,
gx->compile_time, gx->opt_compile_count);
/* write optimized mode names */
block = gx->optimized_block;
if(block)
fprintf(f, "OPTIMIZED %s %s %s\n",
block->source_name, block->object_name, block->symbol_name);
/* NB: other fields will be filled in with freshly guessed values */
}
(void) fclose(f);
}
void
print_gx_blocks(sim_gx_block_list* blocks, char* where)
{
printf("print_gx_blocks: %s\n", where);
if(blocks == NULL)
printf("(null)\n");
else
{
int i;
printf("size: %d, used: %d\n",
blocks->gx_blocks_size, blocks->gx_blocks_used);
/* linear search */
for(i=0; i<blocks->gx_blocks_used; i++)
{
sim_gx_block* gx = blocks->gx_blocks[i];
printf("block %d: %p\n", i, (void*) gx);
if(gx == NULL)
printf("** NULL!\n");
else
printf(" begin 0x%08x length 0x%08x [opt %d%s]\n",
(unsigned)gx->origin, (unsigned)gx->length,
gx->opt_compile_count,
(gx->optimized_block ? " loaded" : " discarded"));
}
}
}
/* Read the current block list from the cache */
void
sim_gx_read_block_list()
{
SIM_DESC sd = current_state;
FILE* f;
char state_file_name[PATH_MAX];
char *exec_name;
/* check for block */
if(STATE_PROG_BFD(sd) == NULL)
return;
/* get base of executable name */
exec_name = bfd_get_filename(STATE_PROG_BFD(sd));
if(strrchr(exec_name, '/') != NULL)
exec_name = strrchr(exec_name, '/') + 1;
/* generate base name */
sprintf(state_file_name, "%s/%s.gx",
GX_DIR,
exec_name);
f = fopen(state_file_name, "r");
if(f == NULL)
{
/* XXX: print warning */
return;
}
fscanf(f, "#%*[^\n]\n"); /* swallow # comment line */
while(1)
{
unsigned_4 origin, length;
unsigned divisor;
sim_gx_block* gx;
int rc;
sim_gx_compiled_block* block;
unsigned age;
int j;
rc = fscanf(f, "BLOCK 0x%0lx 0x%lx %u %u\n", & origin, & length, & divisor, & age);
if(rc != 4) /* not all fields matched - assume EOF */
break;
gx = zalloc(sizeof(sim_gx_block));
/* initialize block bounds, callback struct etc. */
tgx_block_ctor2(gx, origin, length, divisor);
/* read flags */
fscanf(f, "FLAGS");
for(j=0; j<GX_PC_FLAGS_INDEX(gx, gx->origin + gx->length); j++)
{
unsigned value;
fscanf(f, "%2x ", & value);
gx->pc_flags[j] = (unsigned_1) value;
}
fscanf(f, "\n");
/* read learning mode info */
block = zalloc(sizeof(sim_gx_compiled_block));
gx->learning_block = block;
block->source_name = zalloc(PATH_MAX);
block->object_name = zalloc(PATH_MAX);
block->symbol_name = zalloc(PATH_MAX);
fscanf(f, "LEARNING %s %s %s %lu %u\n",
block->source_name, block->object_name, block->symbol_name,
& gx->compile_time, & gx->opt_compile_count);
/* read optimized mode info */
block = zalloc(sizeof(sim_gx_compiled_block));
gx->optimized_block = block;
block->source_name = zalloc(PATH_MAX);
block->object_name = zalloc(PATH_MAX);
block->symbol_name = zalloc(PATH_MAX);
rc = fscanf(f, "OPTIMIZED %s %s %s\n",
block->source_name, block->object_name, block->symbol_name);
if(rc != 3)
{
/* oops, not an optimized block */
zfree(block->source_name);
zfree(block->object_name);
zfree(block->symbol_name);
zfree(block);
gx->optimized_block = NULL;
}
/* fill in remaining fields */
gx->learn_last_change = time(NULL) - age; /* make absolute */
/* store it away */
sim_gx_block_add(gx);
}
/* print_gx_blocks(STATE_BLOCKS(sd), "after restoring state"); */
}
/* Add a gx block to list */
void
sim_gx_block_add(sim_gx_block* block)
{
SIM_DESC sd = current_state;
sim_gx_block_list* blocks = STATE_BLOCKS(sd);
int i;
/* print_gx_blocks(blocks, "pre add"); */
if(blocks == NULL)
blocks = STATE_BLOCKS(sd) = zalloc(sizeof(sim_gx_block_list));
/* need to enlarge block vector? */
if(blocks->gx_blocks_used == blocks->gx_blocks_size)
{
sim_gx_block** new_blocks;
int j;
blocks->gx_blocks_size += 20;
new_blocks = zalloc(blocks->gx_blocks_size * sizeof(sim_gx_block*));
for(j=0; j<blocks->gx_blocks_used; j++)
new_blocks[j] = blocks->gx_blocks[j];
if(blocks->gx_blocks) zfree(blocks->gx_blocks);
blocks->gx_blocks = new_blocks;
}
/* insert new block */
for(i=0; i<blocks->gx_blocks_used; i++)
{
ASSERT(blocks->gx_blocks[i] != NULL);
/* insertion point reached? */
if(blocks->gx_blocks[i]->origin > block->origin)
{
int j;
for(j=blocks->gx_blocks_used; j>=i; j--)
blocks->gx_blocks[j] = blocks->gx_blocks[j-1];
blocks->gx_blocks[i] = block;
blocks->gx_blocks_used ++;
break;
}
}
/* end of block vector */
if(i == blocks->gx_blocks_used)
{
blocks->gx_blocks[blocks->gx_blocks_used ++] = block;
}
/* print_gx_blocks(blocks, "post add"); */
}
/* Remove a gx block from list */
void
sim_gx_block_remove(sim_gx_block* block)
{
SIM_DESC sd = current_state;
sim_gx_block_list* blocks = STATE_BLOCKS(sd);
int i;
/* print_gx_blocks(blocks, "pre remove"); */
/* linear search */
for(i=0; i<blocks->gx_blocks_used; i++)
{
if(blocks->gx_blocks[i] == block)
{
/* found it */
while(i < blocks->gx_blocks_used - 1)
{
blocks->gx_blocks[i] = blocks->gx_blocks[i+1];
i++;
}
blocks->gx_blocks_used --;
break;
}
}
/* print_gx_blocks(blocks, "post remove"); */
}
/* Find a gx block from list */
sim_gx_block*
sim_gx_block_find(sim_cia cia)
{
SIM_DESC sd = current_state;
sim_gx_block_list* blocks = STATE_BLOCKS(sd);
int i;
if(blocks == NULL) return NULL;
/* print_gx_blocks(blocks, "pre find"); */
/* linear search */
for(i=0; i<blocks->gx_blocks_used; i++)
{
sim_gx_block* gx = blocks->gx_blocks[i];
ASSERT(gx != NULL);
if(GX_PC_INCLUDES(gx,cia))
{
return gx;
}
}
return NULL;
}
/* generate */
void
sim_gx_block_translate(sim_gx_block* gx, int optimized)
{
char pwd_name[PATH_MAX];
char dir_name[PATH_MAX];
char base_name[PATH_MAX];
char compile_command[PATH_MAX*4];
char* exec_name;
SIM_DESC sd = current_state;
int rc;
sim_cia gx_cia;
sim_gx_compiled_block* block = zalloc(sizeof(sim_gx_compiled_block));
unsigned time_begin, time_end;
time_begin = time(NULL);
if(optimized) gx->optimized_block = block;
else gx->learning_block = block;
/* get base of executable name */
exec_name = bfd_get_filename(STATE_PROG_BFD(sd));
if(strrchr(exec_name, '/') != NULL)
exec_name = strrchr(exec_name, '/') + 1;
/* generate base name */
sprintf(dir_name, "%s/%s",
GX_DIR,
exec_name);
/* generate base name */
getcwd(pwd_name, sizeof(pwd_name));
/* create work directory */
rc = mkdir(GX_DIR, 0777);
if(rc != 0 &&
errno != EEXIST)
{
sim_io_error(sd, "Error: cannot create directory %s, errno %d",
GX_DIR, errno);
}
rc = mkdir(dir_name, 0777);
if(rc != 0 &&
errno != EEXIST)
{
sim_io_error(sd, "Error: cannot create directory %s, errno %d",
dir_name, errno);
}
/* compute base name */
if(optimized)
sprintf(base_name, "%08lx_opt%d", gx->origin, gx->opt_compile_count);
else
sprintf(base_name, "%08lx", gx->origin);
/* generate source/object file names */
block->source_name = zalloc(PATH_MAX);
block->object_name = zalloc(PATH_MAX);
sprintf(block->source_name, "%s/%s.c", dir_name, base_name);
/* generate symbol name for gx function */
block->symbol_name = zalloc(PATH_MAX);
sprintf(block->symbol_name, "gx_%s", base_name);
/* open source file */
block->source_file = fopen(block->source_name, "w");
if(block->source_file == NULL)
{
sim_io_error(sd, "Error: cannot open file %s, errno %d",
block->source_name, errno);
}
/* front matter */
fprintf(block->source_file, "/* sim-gx version %d */\n", GX_VERSION);
fprintf(block->source_file, "/* gx block date stamp %lu */\n\n", time(NULL));
/* emit head end of source */
tgx_emit_pre_function(gx, optimized);
/* emit function header */
fprintf(block->source_file, "\n\n");
fprintf(block->source_file, "extern int\n");
fprintf(block->source_file, "%s", block->symbol_name);
fprintf(block->source_file, "(struct tgx_info* info)\n");
fprintf(block->source_file, "{\n");
fprintf(block->source_file, " int rc = 0;\n");
if(! optimized)
fprintf(block->source_file, " unsigned int insn_count = 0;\n");
/* emit threaded goto vector for __GNUC__ */
fprintf(block->source_file, "#ifdef __GNUC__\n");
fprintf(block->source_file, " static void* jump_table[] =\n");
fprintf(block->source_file, " {\n");
gx_cia = gx->origin;
while(GX_PC_INCLUDES(gx,gx_cia))
{
sim_cia next_gx_cia;
if((! optimized) ||
(GX_PC_FLAGS(gx, gx_cia) & GX_PCF_JUMPTARGET))
{
fprintf(block->source_file, " && gx_label_%ld,\n",
((gx_cia - gx->origin) / gx->divisor));
}
else
{
fprintf(block->source_file, " && gx_label_default,\n");
}
gx_cia = gx_cia + gx->divisor;
}
fprintf(block->source_file, " };\n");
fprintf(block->source_file, "#endif /*__GNUC__*/\n");
/* pre-block gunk: register load */
tgx_emit_load_block(gx, optimized);
/* emit intra-block jump label */
fprintf(block->source_file, "\n");
fprintf(block->source_file, "shortjump:\n");
fprintf(block->source_file, " pc = npc;\n");
/* translate jumptarget table */
if(! optimized)
{
fprintf(block->source_file, " pc_flags[(pc - 0x%08x) / %u] |= %d;\n",
(unsigned)gx->origin, gx->divisor, GX_PCF_JUMPTARGET);
}
/* enforce learning mode run limit */
if(! optimized)
{
fprintf(block->source_file, " insn_count++;\n");
fprintf(block->source_file, " if (insn_count > %d)\n", GX_LEARN_RUN_LIMIT);
fprintf(block->source_file, " {\n");
fprintf(block->source_file, " rc = %d;\n", GX_F_YIELD);
fprintf(block->source_file, " npc = pc;\n");
fprintf(block->source_file, " goto save;\n");
fprintf(block->source_file, " }\n");
}
/* emit PC switch, use compressed case numbers */
fprintf(block->source_file, "\n");
fprintf(block->source_file, "#ifdef __GNUC__\n");
fprintf(block->source_file, " goto * jump_table[((pc - 0x%08x) / %u)];\n",
(unsigned)gx->origin, gx->divisor);
fprintf(block->source_file, "#else /* ! __GNUC__*/\n");
fprintf(block->source_file, " switch((pc - 0x%08x) / %u)\n",
(unsigned)gx->origin, gx->divisor);
fprintf(block->source_file, "#endif /*__GNUC__*/\n");
fprintf(block->source_file, " {\n");
/* handle bad-PC event */
fprintf(block->source_file, " /* handle unknown jump target */\n");
fprintf(block->source_file, "#ifdef __GNUC__\n");
fprintf(block->source_file, " gx_label_default:\n");
fprintf(block->source_file, "#else /* ! __GNUC__*/\n");
fprintf(block->source_file, " default:\n");
fprintf(block->source_file, "#endif /*__GNUC__*/\n");
fprintf(block->source_file, " rc = %d;\n", GX_F_NONPC);
fprintf(block->source_file, " npc = pc;\n");
fprintf(block->source_file, " goto save;\n");
/* start translating at the origin */
gx_cia = gx->origin;
/* translate instructions in block */
while(GX_PC_INCLUDES(gx,gx_cia))
{
sim_cia next_gx_cia;
/* translate PC case statement */
fprintf(block->source_file, "\n");
fprintf(block->source_file, " /* PC: 0x%08x, flags %02x */\n",
gx_cia, (int) GX_PC_FLAGS(gx, gx_cia));
/* skip over this instruction if it is not executed */
if(optimized && !(GX_PC_FLAGS(gx, gx_cia) & GX_PCF_INSTRUCTION))
{
fprintf(block->source_file, " /* (not reached) */\n");
/* prevent fall-through from previous translated insn */
if(gx_cia > gx->origin &&
GX_PC_FLAGS(gx, (gx_cia - gx->divisor)) & GX_PCF_INSTRUCTION)
{
fprintf(block->source_file, " /* prevent fall-through */\n");
fprintf(block->source_file, " npc = 0x%08x;\n", gx_cia);
fprintf(block->source_file, " rc = %d;\n", GX_F_NONPC);
fprintf(block->source_file, " goto save;\n");
}
next_gx_cia = gx_cia + gx->divisor;
goto skip_instruction;
}
/* translate PC case statement */
if((! optimized) ||
(GX_PC_FLAGS(gx, gx_cia) & GX_PCF_JUMPTARGET))
{
fprintf(block->source_file, " gx_label_%ld:\n",
((gx_cia - gx->origin) / gx->divisor));
fprintf(block->source_file, "#ifndef __GNUC__\n");
fprintf(block->source_file, " case %ld:\n",
((gx_cia - gx->origin) / gx->divisor));
fprintf(block->source_file, "#endif /* !__GNUC__ */\n");
}
/* translate breakpoint check & exit */
if(GX_PC_FLAGS(gx, gx_cia) & GX_PCF_COND_HALT)
{
fprintf(block->source_file, " if(pc_flags[%ld] & %d)\n",
GX_PC_FLAGS_INDEX(gx, gx_cia),
GX_PCF_HALT);
fprintf(block->source_file, " {\n");
fprintf(block->source_file, " rc = %d;\n", GX_F_HALT);
fprintf(block->source_file, " npc = pc;\n");
fprintf(block->source_file, " goto save;\n");
fprintf(block->source_file, " }\n");
}
/* [don't] emit PC-setting */
/* fprintf(block->source_file, " pc = 0x%08x;\n", gx_cia); */
/* mark traversed instructions */
if(! optimized)
{
fprintf(block->source_file, " pc_flags[%ld] |= %d;\n",
GX_PC_FLAGS_INDEX(gx, gx_cia),
GX_PCF_INSTRUCTION);
}
/* translate instruction semantics */
next_gx_cia = tgx_emit_insn(gx, gx_cia, optimized);
skip_instruction:
/* go to next instruction */
gx_cia = next_gx_cia;
}
fprintf(block->source_file, " }\n");
/* dropped through last instruction in switch block */
fprintf(block->source_file, "\n");
fprintf(block->source_file, " /* dropped through PC switch */\n");
fprintf(block->source_file, " npc = 0x%08x;\n", gx_cia);
fprintf(block->source_file, " rc = %d;\n", GX_F_RANGE);
fprintf(block->source_file, " goto save;\n");
/* unknown length jump */
fprintf(block->source_file, "\n");
fprintf(block->source_file, "unknownjump:\n");
fprintf(block->source_file, " if(npc >= 0x%08lx && npc < 0x%08lx)\n",
gx->origin, gx->origin + gx->length);
fprintf(block->source_file, " goto shortjump;\n");
/* long jump */
fprintf(block->source_file, "\n");
fprintf(block->source_file, "longjump:\n");
fprintf(block->source_file, " rc = %d;\n", GX_F_RANGE);
/* post-block gunk: SAVE etc. */
fprintf(block->source_file, "\n");
fprintf(block->source_file, "save:\n");
tgx_emit_save_block(gx, optimized);
/* emit tail end of function */
fprintf(block->source_file, "\n");
fprintf(block->source_file, " return rc;\n");
fprintf(block->source_file, "}\n");
/* emit tail end of source */
tgx_emit_post_function(gx, optimized);
/* close source file */
fclose(block->source_file);
block->source_file = NULL;
/* compile source & produce shared object */
sprintf(compile_command,
"gxtool --silent --mode=compile gcc -c %s %s",
(optimized ? "-O9 -fomit-frame-pointer" : "-O"), block->source_name);
rc = system(compile_command);
if(rc != 0)
{
sim_io_error(sd, "Error during compiling: `%s' rc %d",
compile_command, rc);
}
/* link source */
sprintf(compile_command,
"gxtool --silent --mode=link gcc -export-dynamic -rpath %s -o lib%s.la %s.lo",
dir_name, base_name, base_name);
rc = system(compile_command);
if(rc != 0)
{
sim_io_error(sd, "Error during linking: `%s' rc %d",
compile_command, rc);
}
/* install */
sprintf(compile_command,
"gxtool --silent --mode=install cp lib%s.la %s/%s >/dev/null 2>/dev/null",
base_name, pwd_name, dir_name);
rc = system(compile_command);
if(rc != 0)
{
sim_io_error(sd, "Error during install: `%s' rc %d",
compile_command, rc);
}
/* finish */
sprintf(compile_command,
"gxtool --silent --mode=finish %s >/dev/null 2>/dev/null",
dir_name);
rc = system(compile_command);
if(rc != 0)
{
sim_io_error(sd, "Error during finish: `%s' rc %d",
compile_command, rc);
}
/* clean up */
sprintf(compile_command, "gxtool --silent --mode=uninstall rm -f lib%s.la %s.lo", base_name, base_name);
rc = system(compile_command);
if(rc != 0)
{
sim_io_error(sd, "Error during cleanup: `%s' rc %d",
compile_command, rc);
}
/* XXX: FILL IN block->object_name from .la file */
sprintf(block->object_name, "%s/%s/lib%s.so.0",
pwd_name, dir_name, base_name);
/* measure compile time */
time_end = time(NULL);
if(time_end == time_begin) time_end ++; /* clamp minimum duration to 1 */
gx->compile_time += time_end - time_begin;
/* fprintf(stderr, "*** compile time: %d\n", gx->compile_time); */
}
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