/*
* Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#import "ObjFWRT.h"
#import "private.h"
#import "amiga-glue.h"
#include <exec/libraries.h>
#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(OBJFWRT_LIB_MAJOR, OBJFWRT_LIB_MINOR)
#if defined(OF_AMIGAOS_M68K)
# define DATA_OFFSET 0x7FFE
#elif defined(OF_MORPHOS)
# define DATA_OFFSET 0x8000
#endif
#ifdef OF_AMIGAOS_M68K
# define OBJC_M68K_REG(reg) __asm__(#reg)
#else
# define OBJC_M68K_REG(reg)
#endif
/* This always needs to be the first thing in the file. */
int
_start()
{
return -1;
}
#ifdef OF_AMIGAOS_M68K
void
__init_eh(void)
{
}
#endif
struct ObjFWRTBase {
struct Library library;
void *segList;
struct ObjFWRTBase *parent;
char *dataSeg;
bool initialized;
};
#ifdef OF_AMIGAOS_M68K
extern uintptr_t __CTOR_LIST__[];
extern const void *_EH_FRAME_BEGINS__;
extern void *_EH_FRAME_OBJECTS__;
#endif
#ifdef OF_MORPHOS
const ULONG __abox__ = 1;
#endif
struct ExecBase *SysBase;
struct objc_libc libc;
#if defined(OF_AMIGAOS_M68K)
__asm__ (
".text\n"
".globl ___restore_a4\n"
".align 1\n"
"___restore_a4:\n"
" movea.l 42(a6), a4\n"
" rts"
);
#elif defined(OF_MORPHOS)
/* All __saveds functions in this file need to use the M68K ABI */
__asm__ (
".section .text\n"
".align 2\n"
"__restore_r13:\n"
" lwz %r13, 56(%r2)\n"
" lwz %r13, 44(%r13)\n"
" blr\n"
);
#endif
static OF_INLINE char *
getDataSeg(void)
{
char *dataSeg;
#if defined(OF_AMIGAOS_M68K)
__asm__ (
"move.l #___a4_init, %0"
: "=r"(dataSeg)
);
#elif defined(OF_MORPHOS)
__asm__ (
"lis %0, __r13_init@ha\n\t"
"la %0, __r13_init@l(%0)"
: "=r"(dataSeg)
);
#endif
return dataSeg;
}
static OF_INLINE size_t
getDataSize(void)
{
size_t dataSize;
#if defined(OF_AMIGAOS_M68K)
__asm__ (
"move.l #___data_size, %0\n\t"
"add.l #___bss_size, %0"
: "=r"(dataSize)
);
#elif defined(OF_MORPHOS)
__asm__ (
"lis %0, __sdata_size@ha\n\t"
"la %0, __sdata_size@l(%0)\n\t"
"lis %%r9, __sbss_size@ha\n\t"
"la %%r9, __sbss_size@l(%%r9)\n\t"
"add %0, %0, %%r9"
: "=r"(dataSize)
:: "r9"
);
#endif
return dataSize;
}
static OF_INLINE size_t *
getDataDataRelocs(void)
{
size_t *dataDataRelocs;
#if defined(OF_AMIGAOS_M68K)
__asm__ (
"move.l #___datadata_relocs, %0"
: "=r"(dataDataRelocs)
);
#elif defined(OF_MORPHOS)
__asm__ (
"lis %0, __datadata_relocs@ha\n\t"
"la %0, __datadata_relocs@l(%0)\n\t"
: "=r"(dataDataRelocs)
);
#endif
return dataDataRelocs;
}
static struct Library *
lib_init(struct ObjFWRTBase *base OBJC_M68K_REG(d0),
void *segList OBJC_M68K_REG(a0), struct ExecBase *sysBase OBJC_M68K_REG(a6))
{
#if defined(OF_AMIGAOS_M68K)
__asm__ __volatile__ (
"move.l a6, _SysBase"
:: "a"(sysBase)
);
#elif defined(OF_MORPHOS)
__asm__ __volatile__ (
"lis %%r9, SysBase@ha\n\t"
"stw %0, SysBase@l(%%r9)"
:: "r"(sysBase) : "r9"
);
#endif
base->segList = segList;
base->parent = NULL;
base->dataSeg = getDataSeg();
return &base->library;
}
struct Library *__saveds
lib_open(void)
{
OBJC_M68K_ARG(struct ObjFWRTBase *, base, a6)
struct ObjFWRTBase *child;
size_t dataSize, *dataDataRelocs;
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 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;
dataSize = getDataSize();
if ((child->dataSeg = AllocMem(dataSize, MEMF_ANY)) == NULL) {
FreeMem((char *)child - child->library.lib_NegSize,
child->library.lib_NegSize + child->library.lib_PosSize);
base->library.lib_OpenCnt--;
return NULL;
}
memcpy(child->dataSeg, base->dataSeg - DATA_OFFSET, dataSize);
dataDataRelocs = getDataDataRelocs();
displacement = child->dataSeg - (base->dataSeg - DATA_OFFSET);
for (size_t i = 1; i <= dataDataRelocs[0]; i++)
*(long *)(child->dataSeg + dataDataRelocs[i]) += displacement;
child->dataSeg += DATA_OFFSET;
return &child->library;
}
static void *
expunge(struct ObjFWRTBase *base, struct ExecBase *sysBase)
{
#define SysBase sysBase
void *segList;
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;
}
segList = base->segList;
Remove(&base->library.lib_Node);
FreeMem((char *)base - base->library.lib_NegSize,
base->library.lib_NegSize + base->library.lib_PosSize);
return segList;
#undef SysBase
}
static void *__saveds
lib_expunge(void)
{
OBJC_M68K_ARG(struct ObjFWRTBase *, base, a6)
return expunge(base, SysBase);
}
static void *__saveds
lib_close(void)
{
/*
* SysBase becomes invalid during this function, so we store it in
* sysBase and add a define to make the inlines use the right one.
*/
struct ExecBase *sysBase = SysBase;
#define SysBase sysBase
OBJC_M68K_ARG(struct ObjFWRTBase *, base, a6)
if (base->parent != NULL) {
struct ObjFWRTBase *parent;
#ifdef OF_AMIGAOS_M68K
if (base->initialized)
for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
libc.__deregister_frame_info(
(&_EH_FRAME_BEGINS__)[i]);
#endif
parent = base->parent;
FreeMem(base->dataSeg - DATA_OFFSET, getDataSize());
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, sysBase);
return NULL;
#undef SysBase
}
static void *
lib_null(void)
{
return NULL;
}
bool
objc_init(unsigned int version, struct objc_libc *libc_)
{
#ifdef OF_AMIGAOS_M68K
OBJC_M68K_ARG(struct ObjFWRTBase *, base, a6)
#else
register struct ObjFWRTBase *r12 __asm__("r12");
struct ObjFWRTBase *base = r12;
#endif
#ifdef OF_MORPHOS
void *frame;
#endif
uintptr_t *iter, *iter0;
if (version > 1)
return false;
memcpy(&libc, libc_, sizeof(libc));
#ifdef OF_AMIGAOS_M68K
if ((size_t)_EH_FRAME_BEGINS__ != (size_t)_EH_FRAME_OBJECTS__)
return false;
for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
libc.__register_frame_info((&_EH_FRAME_BEGINS__)[i],
(&_EH_FRAME_OBJECTS__)[i]);
iter0 = &__CTOR_LIST__[1];
#elif defined(OF_MORPHOS)
__asm__ (
"lis %0, __EH_FRAME_BEGIN__@ha\n\t"
"la %0, __EH_FRAME_BEGIN__@l(%0)\n\t"
"lis %1, __CTOR_LIST__@ha\n\t"
"la %1, __CTOR_LIST__@l(%1)\n\t"
: "=r"(frame), "=r"(iter0)
);
libc.__register_frame(frame);
#endif
for (iter = iter0; *iter != 0; iter++);
while (iter > iter0) {
void (*ctor)(void) = (void (*)(void))*--iter;
ctor();
}
base->initialized = true;
return true;
}
void *
malloc(size_t size)
{
return libc.malloc(size);
}
void *
calloc(size_t count, size_t size)
{
return libc.calloc(count, size);
}
void *
realloc(void *ptr, size_t size)
{
return libc.realloc(ptr, size);
}
void
free(void *ptr)
{
libc.free(ptr);
}
#ifdef HAVE_SJLJ_EXCEPTIONS
int
_Unwind_SjLj_RaiseException(void *ex)
{
return libc._Unwind_SjLj_RaiseException(ex);
}
#else
int
_Unwind_RaiseException(void *ex)
{
return libc._Unwind_RaiseException(ex);
}
#endif
void
_Unwind_DeleteException(void *ex)
{
libc._Unwind_DeleteException(ex);
}
void *
_Unwind_GetLanguageSpecificData(void *ctx)
{
return libc._Unwind_GetLanguageSpecificData(ctx);
}
uintptr_t
_Unwind_GetRegionStart(void *ctx)
{
return libc._Unwind_GetRegionStart(ctx);
}
uintptr_t
_Unwind_GetDataRelBase(void *ctx)
{
return libc._Unwind_GetDataRelBase(ctx);
}
uintptr_t
_Unwind_GetTextRelBase(void *ctx)
{
return libc._Unwind_GetTextRelBase(ctx);
}
uintptr_t
_Unwind_GetIP(void *ctx)
{
return libc._Unwind_GetIP(ctx);
}
uintptr_t
_Unwind_GetGR(void *ctx, int gr)
{
return libc._Unwind_GetGR(ctx, gr);
}
void
_Unwind_SetIP(void *ctx, uintptr_t ip)
{
libc._Unwind_SetIP(ctx, ip);
}
void
_Unwind_SetGR(void *ctx, int gr, uintptr_t value)
{
libc._Unwind_SetGR(ctx, gr, value);
}
#ifdef HAVE_SJLJ_EXCEPTIONS
void
_Unwind_SjLj_Resume(void *ex)
{
libc._Unwind_SjLj_Resume(ex);
}
#else
void
_Unwind_Resume(void *ex)
{
libc._Unwind_Resume(ex);
}
#endif
#ifdef OF_AMIGAOS_M68K
int
snprintf(char *restrict str, size_t size, const char *restrict fmt, ...)
{
va_list args;
int ret;
va_start(args, fmt);
ret = vsnprintf(str, size, fmt, args);
va_end(args);
return ret;
}
int
vsnprintf(char *restrict str, size_t size, const char *restrict fmt,
va_list args)
{
return libc.vsnprintf(str, size, fmt, args);
}
#endif
int
atexit(void (*function)(void))
{
return libc.atexit(function);
}
void
exit(int status)
{
libc.exit(status);
OF_UNREACHABLE
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
static CONST_APTR functionTable[] = {
#ifdef OF_MORPHOS
(CONST_APTR)FUNCARRAY_BEGIN,
(CONST_APTR)FUNCARRAY_32BIT_NATIVE,
#endif
(CONST_APTR)lib_open,
(CONST_APTR)lib_close,
(CONST_APTR)lib_expunge,
(CONST_APTR)lib_null,
#ifdef OF_MORPHOS
(CONST_APTR)-1,
(CONST_APTR)FUNCARRAY_32BIT_SYSTEMV,
#endif
#include "amiga-funcarray.inc"
(CONST_APTR)-1,
#ifdef OF_MORPHOS
(CONST_APTR)FUNCARRAY_END
#endif
};
#pragma GCC diagnostic pop
static struct {
ULONG dataSize;
CONST_APTR *functionTable;
ULONG *dataTable;
struct Library *(*initFunc)(
struct ObjFWRTBase *base OBJC_M68K_REG(d0),
void *segList OBJC_M68K_REG(a0),
struct ExecBase *execBase OBJC_M68K_REG(a6));
} init_table = {
sizeof(struct ObjFWRTBase),
functionTable,
NULL,
lib_init
};
struct Resident resident = {
.rt_MatchWord = RTC_MATCHWORD,
.rt_MatchTag = &resident,
.rt_EndSkip = &resident + 1,
.rt_Flags = RTF_AUTOINIT
#ifdef OF_MORPHOS
| RTF_PPC | RTF_EXTENDED
#endif
,
.rt_Version = OBJFWRT_LIB_MAJOR,
.rt_Type = NT_LIBRARY,
.rt_Pri = 0,
.rt_Name = (char *)OBJFWRT_AMIGA_LIB,
.rt_IdString = (char *)"ObjFWRT " VERSION_STRING
" \xA9 2008-2021 Jonathan Schleifer",
.rt_Init = &init_table,
#ifdef OF_MORPHOS
.rt_Revision = OBJFWRT_LIB_MINOR,
.rt_Tags = NULL,
#endif
};
#ifdef OF_MORPHOS
__asm__ (
".section .eh_frame, \"aw\"\n"
".globl __EH_FRAME_BEGIN__\n"
".type __EH_FRAME_BEGIN__, @object\n"
"__EH_FRAME_BEGIN__:\n"
".section .ctors, \"aw\"\n"
".globl __CTOR_LIST__\n"
".type __CTOR_LIST__, @object\n"
"__CTOR_LIST__:\n"
".section .text"
);
#endif