/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019, 2020
* 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 "OFObject.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(OBJFW_LIB_MAJOR, OBJFW_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 OF_M68K_REG(reg) __asm__(#reg)
#else
# define OF_M68K_REG(reg)
#endif
/* This always needs to be the first thing in the file. */
int
_start()
{
return -1;
}
struct ObjFWBase {
struct Library library;
void *segList;
struct ObjFWBase *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;
#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 ObjFWBase *base OF_M68K_REG(d0), void *segList OF_M68K_REG(a0),
struct ExecBase *sysBase OF_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)
{
OF_M68K_ARG(struct ObjFWBase *, base, a6)
struct ObjFWBase *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 ObjFWBase *)((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 ObjFWBase *base)
{
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;
}
static void *__saveds
lib_expunge(void)
{
OF_M68K_ARG(struct ObjFWBase *, base, a6)
return expunge(base);
}
static void *__saveds
lib_close(void)
{
OF_M68K_ARG(struct ObjFWBase *, base, a6)
if (base->parent != NULL) {
struct ObjFWBase *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);
return NULL;
}
static void *
lib_null(void)
{
return NULL;
}
#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
#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 ObjFWBase *base OF_M68K_REG(d0),
void *segList OF_M68K_REG(a0),
struct ExecBase *execBase OF_M68K_REG(a6));
} init_table = {
sizeof(struct ObjFWBase),
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 = OBJFW_LIB_MAJOR,
.rt_Type = NT_LIBRARY,
.rt_Pri = 0,
.rt_Name = (char *)OBJFW_AMIGA_LIB,
.rt_IdString = (char *)"ObjFW " VERSION_STRING
" \xA9 2008-2020 Jonathan Schleifer",
.rt_Init = &init_table,
#ifdef OF_MORPHOS
.rt_Revision = OBJFW_LIB_MINOR,
.rt_Tags = NULL,
#endif
};
#ifdef OF_MORPHOS
__asm__ (
".section .ctors, \"aw\", @progbits\n"
"ctors:\n"
" .long -1\n"
".section .text"
);
#endif