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#include <exec/nodes.h>
#include <exec/resident.h>
#include <proto/exec.h>
#define CONCAT_VERSION2(major, minor) #major "." #minor
#define CONCAT_VERSION(major, minor) CONCAT_VERSION2(major, minor)
#define VERSION_STRING CONCAT_VERSION(OBJFW_RT_LIB_MAJOR, OBJFW_RT_LIB_MINOR)
#define DATA_OFFSET 0x7FFE
/* This always needs to be the first thing in the file. */
int
_start()
{
return -1;
}
struct ObjFWRTBase {
struct Library library;
void *seg_list;
struct ObjFWRTBase *parent;
char *data_seg;
bool initialized;
void *data_seg;
extern void *__a4_init;
extern void *__a4_init, *__data_size;
struct ExecBase *SysBase;
" movea.l 40(a6), a4\n"
" movea.l 42(a6), a4\n"
" rts"
);
static OF_INLINE void *
static OF_INLINE char *
get_data_seg(void)
{
void *data_seg;
char *data_seg;
__asm__ __volatile__ (
"lea.l ___a4_init, %0" : "=a"(data_seg)
"move.l #___a4_init, %0" : "=r"(data_seg)
);
return data_seg;
}
static OF_INLINE size_t *
get_datadata_relocs(void)
{
size_t *datadata_relocs;
__asm__ __volatile__ (
"move.l #___datadata_relocs, %0" : "=r"(datadata_relocs)
);
return datadata_relocs;
}
static struct Library *
lib_init(struct ExecBase *sys_base OBJC_M68K_REG("a6"),
void *seg_list OBJC_M68K_REG("a0"),
struct ObjFWRTBase *base OBJC_M68K_REG("d0"))
{
__asm__ __volatile__ (
"move.l a6, _SysBase" :: "a"(sys_base)
);
base->seg_list = seg_list;
base->parent = NULL;
base->data_seg = get_data_seg();
return &base->library;
}
static struct Library *
struct Library *__saveds
OBJC_M68K_FUNC(lib_open, struct ObjFWRTBase *base OBJC_M68K_REG("a6"))
{
OBJC_M68K_ARG(struct ObjFWRTBase *, base, REG_A6)
struct ObjFWRTBase *child;
size_t data_size, *datadata_relocs;
ptrdiff_t displacement;
if (base->parent != NULL)
return NULL;
base->library.lib_OpenCnt++;
base->library.lib_Flags &= ~LIBF_DELEXP;
/*
* We cannot use malloc here, as that depends on the libc passed from
* the application.
*/
if ((child = AllocMem(base->library.lib_NegSize +
base->library.lib_PosSize, MEMF_ANY)) == NULL) {
base->library.lib_OpenCnt--;
return &base->library;
return NULL;
}
memcpy(child, (char *)base - base->library.lib_NegSize,
base->library.lib_NegSize + base->library.lib_PosSize);
child = (struct ObjFWRTBase *)
((char *)child + base->library.lib_NegSize);
child->library.lib_OpenCnt = 1;
child->parent = base;
data_size = (uintptr_t)&__data_size -
((uintptr_t)&__a4_init - DATA_OFFSET);
if ((child->data_seg = AllocMem(data_size, MEMF_ANY)) == NULL) {
base->library.lib_OpenCnt--;
return NULL;
}
memcpy(child->data_seg, base->data_seg - DATA_OFFSET, data_size);
datadata_relocs = get_datadata_relocs();
displacement = child->data_seg - (base->data_seg - DATA_OFFSET);
for (size_t i = 1; i <= datadata_relocs[0]; i++)
*(long *)(child->data_seg + datadata_relocs[i]) += displacement;
child->data_seg += DATA_OFFSET;
return &child->library;
}
static void *
expunge(struct ObjFWRTBase *base)
{
void *seg_list;
if (base->parent != NULL) {
base->parent->library.lib_Flags |= LIBF_DELEXP;
return 0;
}
if (base->library.lib_OpenCnt > 0) {
base->library.lib_Flags |= LIBF_DELEXP;
return 0;
}
seg_list = base->seg_list;
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}
static void *__saveds
OBJC_M68K_FUNC(lib_close, struct ObjFWRTBase *base OBJC_M68K_REG("a6"))
{
OBJC_M68K_ARG(struct ObjFWRTBase *, base, REG_A6)
if (base->parent != NULL) {
struct ObjFWRTBase *parent;
if (base->initialized &&
(size_t)_EH_FRAME_BEGINS__ == (size_t)_EH_FRAME_OBJECTS__)
for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
base->libc.__deregister_frame_info(
(&_EH_FRAME_BEGINS__)[i]);
if (base->initialized &&
(size_t)_EH_FRAME_BEGINS__ == (size_t)_EH_FRAME_OBJECTS__)
for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
base->libc.__deregister_frame_info(
(&_EH_FRAME_BEGINS__)[i]);
parent = base->parent;
FreeMem(base->data_seg - DATA_OFFSET, (uintptr_t)&__data_size -
((uintptr_t)&__a4_init - DATA_OFFSET));
FreeMem((char *)base - base->library.lib_NegSize,
base->library.lib_NegSize + base->library.lib_PosSize);
base = parent;
}
if (--base->library.lib_OpenCnt == 0 &&
(base->library.lib_Flags & LIBF_DELEXP))
return expunge(base);
return 0;
}
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