DCstruct* dcNewStruct(DCsize fieldCount, DCint alignment)
{
DCstruct* s = (DCstruct*)dcAllocMem(sizeof(DCstruct));
s->pCurrentStruct = s;
s->pLastStruct = NULL;
s->nextField = 0;
s->fieldCount = fieldCount;
s->alignment = alignment;
s->size = 0;
s->pFields = (DCfield*)dcAllocMem(fieldCount * sizeof(DCfield));
return s;
}
static DCCallVM* dc_callvm_new_arm32_thumb(DCCallVM_vt* vt, DCsize size)
{
/* Store at least 16 bytes (4 words) for internal spill area. Assembly code depends on it. */
DCCallVM_arm32_thumb* self = (DCCallVM_arm32_thumb*)dcAllocMem(sizeof(DCCallVM_arm32_thumb)+size+16);
dc_callvm_base_init(&self->mInterface, vt);
dcVecInit(&self->mVecHead, size);
return (DCCallVM*)self;
}
static DCCallVM* dc_callvm_new_mips_o32(DCCallVM_vt* vt, DCsize size)
{
DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)dcAllocMem(sizeof(DCCallVM_mips_o32)+size);
dc_callvm_base_init(&self->mInterface, vt);
dcVecInit(&self->mVecHead, size);
dc_callvm_reset_mips_o32( (DCCallVM*) self );
return (DCCallVM*)self;
}
/* the six output registers %o0-%o5 are always loaded, thus we need to ensure the argument buffer has space for at least 24 bytes. */
static DCCallVM* dc_callvm_new_sparc(DCCallVM_vt* vt, DCsize size)
{
size=DC_MAX(size,sizeof(void*)*(6+1));
DCCallVM_sparc* self = (DCCallVM_sparc*) dcAllocMem(sizeof(DCCallVM_sparc)+size);
dc_callvm_base_init(&self->mInterface, vt);
dcVecInit(&self->mVecHead,size);
return (DCCallVM*)self;
}
/* the six output registers %o0-%o5 are always loaded, thus we need to ensure the argument buffer has space for at least 24 bytes. */
static DCCallVM* dc_callvm_new_sparc64(DCCallVM_vt* vt, DCsize size)
{
DCCallVM_sparc64* self = (DCCallVM_sparc64*) dcAllocMem(sizeof(DCCallVM_sparc64)+DHEAD+size);
dc_callvm_base_init(&self->mInterface, vt);
dcVecInit(&self->mVecHead,DHEAD+size);
dc_callvm_reset_sparc64(&self->mInterface);
return (DCCallVM*)self;
}
DCCallVM* dcNewCallVM(DCsize size)
{
DCCallVM_ppc64* self = (DCCallVM_ppc64*)dcAllocMem(sizeof(DCCallVM_ppc64)+size);
dcVecInit(&self->mVecHead, size);
self->mIntRegs = 0;
self->mFloatRegs = 0;
dc_callvm_mode_ppc64( (DCCallVM*) self, DC_CALL_C_DEFAULT );
return (DCCallVM*)self;
}
static DCCallVM* dc_callvm_new_x86(DCCallVM_vt* vt, DCsize size)
{
DCCallVM_x86* self = (DCCallVM_x86*) dcAllocMem( sizeof(DCCallVM_x86)+size );
dc_callvm_base_init(&self->mInterface, vt);
self->mIntRegs = 0;
dcVecInit(&self->mVecHead, size);
return (DCCallVM*) self;
}
static DCCallVM* dc_callvm_new_arm32_armhf(DCCallVM_vt* vt, DCsize size)
{
/* Store at least 16 bytes (4 words) for internal spill area. Assembly code depends on it. */
DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)dcAllocMem(sizeof(DCCallVM_arm32_armhf)+size+16);
dc_callvm_base_init(&p->mInterface, vt);
dcVecInit(&p->mVecHead, size);
p->i = 0;
p->s = 0;
p->d = 0;
return (DCCallVM*)p;
}
/* Public API. */
DCCallVM* dcNewCallVM(DCsize size)
{
DCCallVM_x86* p = (DCCallVM_x86*)dcAllocMem(sizeof(DCCallVM_x86)+size);
dc_callvm_mode_x86((DCCallVM*)p, DC_CALL_C_DEFAULT);
dcVecInit(&p->mVecHead, size);
dc_callvm_reset_x86((DCCallVM*)p);
return (DCCallVM*)p;
}
/* Public API. */
DCCallVM* dcNewCallVM(DCsize size)
{
/* Store at least 16 bytes (4 words) for internal spill area. Assembly code depends on it. */
DCCallVM_mips_eabi* p = (DCCallVM_mips_eabi*)dcAllocMem(sizeof(DCCallVM_mips_eabi)+size+16);
dc_callvm_mode_mips_eabi((DCCallVM*)p, DC_CALL_C_DEFAULT);
dcVecInit(&p->mVecHead, size);
dc_callvm_reset_mips_eabi((DCCallVM*)p);
return (DCCallVM*)p;
}
/* Public API. */
DCCallVM* dcNewCallVM(DCsize size)
{
/* Store at least 16 bytes (4 words for first 4 int args) for internal spill area. Assembly code depends on it. */
DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)dcAllocMem(sizeof(DCCallVM_arm32_armhf)+size+16);
mode((DCCallVM*)p, DC_CALL_C_DEFAULT);
dcVecInit(&p->mVecHead, size);
reset((DCCallVM*)p);
return (DCCallVM*)p;
}
DLSyms* dlSymsInit(const char* libPath)
{
unsigned char* pMem;
void* pSectionContent;
int i;
struct stat st;
DLSyms* pSyms = (DLSyms*)dcAllocMem(sizeof(DLSyms));
memset(pSyms, 0, sizeof(DLSyms));
pSyms->file = open(libPath, O_RDONLY);
stat(libPath, &st);
pSyms->fileSize = st.st_size;
pSyms->pElf_Ehdr = (Elf_Ehdr*) mmap((void*) NULL, pSyms->fileSize, PROT_READ, MAP_SHARED, pSyms->file, 0);
#ifdef DL__BinaryFormat_elf32
assert(pSyms->pElf_Ehdr->e_ident[EI_CLASS] == ELFCLASS32);
#else
assert(pSyms->pElf_Ehdr->e_ident[EI_CLASS] == ELFCLASS64);
#endif
assert(pSyms->pElf_Ehdr->e_phoff > 0);
assert(pSyms->pElf_Ehdr->e_shoff > 0);
pMem = (unsigned char*)pSyms->pElf_Ehdr;
/* traverse section headers */
Elf_Shdr* pS = (Elf_Shdr*) ( pMem + pSyms->pElf_Ehdr->e_shoff );
/* skip section 0 which is always zero due to the Elf standard. */
for (i = 1; i < pSyms->pElf_Ehdr->e_shnum; i++)
{
Elf_Shdr* pSection = &pS[i];
pSectionContent = ((char*)pMem) + pSection->sh_offset;
switch (pSection->sh_type)
{
case SHT_DYNSYM:
if (!pSyms->pSymTab) {
pSyms->pSymTab = (Elf_Sym*)pSectionContent;
pSyms->nSymbols = pSection->sh_size / pSection->sh_entsize;
}
break;
case SHT_STRTAB:
// Do not trust pSyms->pElf_Ehdr->e_shstrndx!
if (!pSyms->pStrTab) {
pSyms->pStrTab = (const char*)pSectionContent;
pSyms->strTabSize = pSection->sh_size;
}
break;
}
if (pSyms->pSymTab && pSyms->pStrTab)
break;
}
return pSyms;
}
static DCCallVM* dc_callvm_new_arm64(DCCallVM_vt* vt, DCsize size)
{
DCCallVM_arm64* p = (DCCallVM_arm64*) dcAllocMem(size);
dc_callvm_base_init(&p->mInterface, vt);
dcVecInit(&p->mVecHead, size);
p->i = 0;
p->f = 0;
return (DCCallVM*)p;
}
static DCCallVM* dc_callvm_new_x64(DCCallVM_vt* vt, DCsize size)
{
DCCallVM_x64* self = (DCCallVM_x64*)dcAllocMem(sizeof(DCCallVM_x64)+size);
dc_callvm_base_init(&self->mInterface, vt);
/* Since we store register parameters in DCCallVM_x64 directly, adjust the stack size. */
size -= sizeof(DCRegData_x64);
size = (((signed long)size) < 0) ? 0 : size;
self->mRegCount.i = self->mRegCount.f = 0;
dcVecInit(&self->mVecHead, size);
return (DCCallVM*)self;
}
DLSyms* dlSymsInit(const char* libPath)
{
DLSyms* pSyms = NULL;
uint32_t iImage, nImages;
for (iImage = 0, nImages = _dyld_image_count(); iImage < nImages; iImage++)
{
const char* name = _dyld_get_image_name(iImage);
if (name && !strcmp(name, libPath))
{
const struct MACH_HEADER_TYPE* pHeader = _dyld_get_image_header(iImage);
const char* pBase = ((const char*)pHeader);
if (pHeader->filetype != MH_DYLIB)
return NULL;
if (pHeader->flags & MH_SPLIT_SEGS)
return NULL;
if (pHeader)
{
uint32_t iCmd, nCmds = pHeader->ncmds;
const struct load_command* cmd = (const struct load_command*)(pBase + sizeof(struct MACH_HEADER_TYPE));
for (iCmd = 0; iCmd < nCmds; iCmd++)
{
if (cmd->cmd == LC_SYMTAB)
{
const struct symtab_command* scmd = (const struct symtab_command*)cmd;
pSyms = (DLSyms*)( dcAllocMem(sizeof(DLSyms)) );
pSyms->symbolCount = scmd->nsyms;
pSyms->pStringTable = pBase + scmd->stroff;
pSyms->pSymbolTable = (struct NLIST_TYPE*)(pBase + scmd->symoff);
return pSyms;
}
cmd = (const struct load_command*)(((char*)cmd) + cmd->cmdsize);
}
}
break;
}
}
return NULL;
}