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$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/lisp/os-common.c,v 1.7 2002/10/24 20:38:59 toy Exp $
This code was written as part of the CMU Common Lisp project at
Carnegie Mellon University, and has been placed in the public domain.
*/
/* Except for os_zero, these routines are only called by Lisp code. These
routines may also be replaced by os-dependent versions instead. See
hpux-os.c for some useful restrictions on actual usage. */
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void os_zero(addr, length)
os_vm_address_t addr;
os_vm_size_t length;
{
os_vm_address_t block_start;
os_vm_size_t block_size;
#ifdef DEBUG
fprintf(stderr,";;; os_zero: addr: 0x%08x, len: 0x%08x\n",addr,length);
#endif
block_start=os_round_up_to_page(addr);
length-=block_start-addr;
block_size=os_trunc_size_to_page(length);
if(block_start>addr)
bzero((char *)addr,block_start-addr);
if(block_size<length)
bzero((char *)block_start+block_size,length-block_size);
if (block_size != 0) {
/* Now deallocate and allocate the block so that it */
/* faults in zero-filled. */
os_invalidate(block_start,block_size);
addr=os_validate(block_start,block_size);
if(addr==NULL || addr!=block_start)
fprintf(stderr,"os_zero: block moved, 0x%08x ==> 0x%08x!\n",block_start,addr);
}
}
os_vm_address_t os_allocate(len)
os_vm_size_t len;
{
return os_validate((os_vm_address_t)NULL,len);
}
os_vm_address_t os_allocate_at(os_vm_address_t addr, os_vm_size_t len)
{
return os_validate(addr, len);
}
void os_deallocate(addr,len)
os_vm_address_t addr;
os_vm_size_t len;
{
os_invalidate(addr,len);
}
/* This function once tried to grow the chunk by asking os_validate if the
space was available, but this really only works under Mach. */
os_vm_address_t os_reallocate(os_vm_address_t addr, os_vm_size_t old_len,
os_vm_size_t len)
{
addr=os_trunc_to_page(addr);
len=os_round_up_size_to_page(len);
old_len=os_round_up_size_to_page(old_len);
if(addr==NULL)
return os_allocate(len);
else{
long len_diff=len-old_len;
if(len_diff<0)
os_invalidate(addr+len,-len_diff);
else{
if(len_diff!=0){
if(new!=NULL){
bcopy(addr,new,old_len);
os_invalidate(addr,old_len);
addr=new;
/* These declarations are lies. They actually take args, but are
never called by C. Only by Lisp */
extern void call_into_c(void);
void os_foreign_linkage_init (void)
{
#ifdef LINKAGE_TABLE
lispobj linkage_data_obj = SymbolValue(LINKAGE_TABLE_DATA);
struct array *linkage_data = 0;
long table_size = 0;
struct vector *data_vector = 0;
long i;
linkage_data = (struct array *)PTR(linkage_data_obj);
table_size = fixnum_value(linkage_data->fill_pointer);
data_vector = (struct vector *)PTR(linkage_data->data);
for (i = 0; i < table_size; i += LINKAGE_DATA_ENTRY_SIZE) {
struct vector *symbol_name
= (struct vector *)PTR(data_vector->data[i]);
long type = fixnum_value(data_vector->data[i + 1]);
lispobj lib_list = data_vector->data[i + 2];
/*
* Verify the "known" entries. This had better match what
* init-foreign-linkage in new-genesis does!
*/
#ifdef sparc
if (type != 1 || strcmp((char *)symbol_name->data,
"call_into_c")) {
fprintf(stderr, "linkage_data is %s but expected call_into_c\n",
(char*)symbol_name->data);
lose("First element of linkage_data is bogus.\n");
}
arch_make_linkage_entry(i, &call_into_c, 1);
#else
if (type != 1 || strcmp((char *)symbol_name->data,
"resolve_linkage_tramp")) {
fprintf(stderr, "linkage_data is %s but expected resolve_linkage_tramp\n",
(char*)symbol_name->data);
arch_make_linkage_entry(i, &resolve_linkage_tramp, 1);
#endif
continue;
}
if (type == 2 && lib_list == NIL) {
void *target_addr = os_dlsym((char *)symbol_name->data, NIL);
if (!target_addr) {
lose("%s is not defined.\n", (char *)symbol_name->data);
}
arch_make_linkage_entry(i / LINKAGE_DATA_ENTRY_SIZE, target_addr,
type);
} else {
arch_make_lazy_linkage(i / LINKAGE_DATA_ENTRY_SIZE);
}
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}
#endif /* LINKAGE_TABLE */
}
/* At the second stage of initialization, after Lisp has dlopened all
needed shared libraries, go back through the table and initialize
data symbols. */
void
os_resolve_data_linkage(void)
{
#ifdef LINKAGE_TABLE
lispobj linkage_data_obj = SymbolValue(LINKAGE_TABLE_DATA);
struct array *linkage_data = 0;
long table_size = 0;
struct vector *data_vector = 0;
long i;
linkage_data = (struct array *)PTR(linkage_data_obj);
table_size = fixnum_value(linkage_data->fill_pointer);
data_vector = (struct vector *)PTR(linkage_data->data);
for (i = 0; i < table_size; i += LINKAGE_DATA_ENTRY_SIZE) {
struct vector *symbol_name
= (struct vector *)PTR(data_vector->data[i]);
long type = fixnum_value(data_vector->data[i + 1]);
lispobj lib_list = data_vector->data[i + 2];
if (type == 2 && lib_list != NIL) {
void *target_addr = os_dlsym((char *)symbol_name->data, lib_list);
if (!target_addr) {
lose("%s is not defined.\n", (char *)symbol_name->data);
}
arch_make_linkage_entry(i / LINKAGE_DATA_ENTRY_SIZE, target_addr,
type);
}
}
#endif /* LINKAGE_TABLE */
}
/* Make entry for the symbol at entry in LINKAGE_TABLE_DATA. Called
from register-foreign-linkage. */
#ifdef LINKAGE_TABLE
extern void undefined_foreign_symbol_trap(lispobj arg);
#endif
unsigned long os_link_one_symbol(long entry)
{
#ifdef LINKAGE_TABLE
lispobj linkage_data_obj = SymbolValue(LINKAGE_TABLE_DATA);
struct array *linkage_data = 0;
long table_size = 0;
struct vector *data_vector = 0;
struct vector *symbol_name;
long type;
void *target_addr;
long table_index = entry * LINKAGE_DATA_ENTRY_SIZE;
linkage_data = (struct array *)PTR(linkage_data_obj);
table_size = fixnum_value(linkage_data->fill_pointer);
if (table_index >= table_size - 1) {
return 0;
}
data_vector = (struct vector *)PTR(linkage_data->data);
symbol_name = (struct vector *)PTR(data_vector->data[table_index]);
type = fixnum_value(data_vector->data[table_index + 1]);
target_addr = os_dlsym((char *)symbol_name->data,
data_vector->data[table_index + 2]);
fprintf(stderr, "Looked up %s symbol %s at %lx\n",
type == 1 ? "code" : "data",
(char*) symbol_name->data, (unsigned long) target_addr);
undefined_foreign_symbol_trap((lispobj)data_vector->data[table_index]);
}
arch_make_linkage_entry(entry, target_addr, type);
return target_addr;
#else
return 0;
#endif /* LINKAGE_TABLE */
}
unsigned long lazy_resolve_linkage(unsigned long retaddr)
{
#ifdef LINKAGE_TABLE
unsigned long target_addr
= os_link_one_symbol(arch_linkage_entry(retaddr));
return target_addr;
#else
return 0;
#endif /* LINKAGE_TABLE */
}