dmd.backend.machobj

Compiler implementation of the D programming language.

Members

Enums

RELaddr anonymousenum RELaddr: Because the Mach-O relocations cannot be computed until after all the segments are written out, and we need more information than the Mach-O relocations provide, make our own relocation type. Later, translate to Mach-O relocation structure.

Functions

Obj_addrel void Obj_addrel(int seg, targ_size_t offset, Symbol* targsym, uint targseg, int rtype, int val = 0): Add a relocation entry for seg/offset.
Obj_addstr IDXSTR Obj_addstr(Outbuffer* strtab, const(char)* str): Output a string into a string table Input: strtab = string table for entry str = string to add
Obj_alias void Obj_alias(const(char)* n1, const(char)* n2): Output an alias definition record.
Obj_allowZeroSize bool Obj_allowZeroSize(): Do we allow zero sized objects?
Obj_byte void Obj_byte(int seg, targ_size_t offset, uint byte_): Output byte to object file.
Obj_bytes uint Obj_bytes(int seg, targ_size_t offset, uint nbytes, void* p): Output bytes to object file.
Obj_codeseg int Obj_codeseg(const char* name, int suffix): Define a new code segment. Input: name name of segment, if null then revert to default suffix 0 use name as is 1 append "_TEXT" to name Output: cseg segment index of new current code segment Offset(cseg) starting offset in cseg
Obj_comdatsize int Obj_comdatsize(Symbol* s, targ_size_t symsize): Setup for Symbol s to go into a COMDAT segment. Output (if s is a function): cseg segment index of new current code segment Offset(cseg) starting offset in cseg
Obj_common_block int Obj_common_block(Symbol* s, targ_size_t size, targ_size_t count): Output a common block definition. Input: p . external identifier size size in bytes of each elem count number of elems
Obj_compiler void Obj_compiler(): Embed compiler version in .obj file.
Obj_data_readonly int Obj_data_readonly(char* p, int len, int* pseg): Ouput read only data for data
Obj_data_start int Obj_data_start(Symbol* sdata, targ_size_t datasize, int seg): Update data information about symbol align for output and assign segment if not already specified.
Obj_ehsections void Obj_ehsections(): Put out symbols that define the beginning/end of the .deh_eh section. This gets called if this is the module with "main()" in it.
Obj_ehtables void Obj_ehtables(Symbol* sfunc, uint size, Symbol* ehsym): Stuff the following data (instance of struct FuncTable) in a separate segment: pointer to function pointer to ehsym length of function
Obj_exestr void Obj_exestr(const(char)* p): Embed string in executable.
Obj_export_symbol void Obj_export_symbol(Symbol* s, uint argsize): Export a function name.
Obj_external int Obj_external(Symbol* s): Output an external for existing symbol. Input: s Symbol to do EXTDEF on (Name is to be mangled)
Obj_external_def int Obj_external_def(const(char)* name): Output an external symbol for name. Input: name Name to do EXTDEF on (Not to be mangled)
Obj_far16thunk void Obj_far16thunk(Symbol* s): Generate far16 thunk. Input: s Symbol to generate a thunk for
Obj_fltused void Obj_fltused(): Mark object file as using floating point.
Obj_func_start void Obj_func_start(Symbol* sfunc): Update function info before codgen
Obj_func_term void Obj_func_term(Symbol* sfunc): Update function info after codgen
Obj_getGOTsym Symbol* Obj_getGOTsym()
Obj_getsegment int Obj_getsegment(const(char)* sectname, const(char)* segname, int align_, int flags): Get segment. Input: align_ segment alignment as power of 2
Obj_gotref void Obj_gotref(Symbol* s)
Obj_includelib bool Obj_includelib(const(char)* name): Output library name.
Obj_init Obj Obj_init(Outbuffer* objbuf, const(char)* filename, const(char)* csegname): Perform initialization that applies to all .o output files. Called before any other obj_xxx routines
Obj_initfile void Obj_initfile(const(char)* filename, const(char)* csegname, const(char)* modname): Initialize the start of object output for this particular .o file.
Obj_jmpTableSegment int Obj_jmpTableSegment(Symbol* s)
Obj_lidata void Obj_lidata(int seg, targ_size_t offset, targ_size_t count): Output an iterated data block of 0s.
Obj_linkerdirective bool Obj_linkerdirective(const(char)* name): Output linker directive.
Obj_linnum void Obj_linnum(Srcpos srcpos, int seg, targ_size_t offset): Record file and line number at segment and offset. The actual .debug_line segment is put out by dwarf_termfile().
Obj_moduleinfo void Obj_moduleinfo(Symbol* scc): Stuff pointer to ModuleInfo in its own segment.
Obj_pubdefsize void Obj_pubdefsize(int seg, Symbol* s, targ_size_t offset, targ_size_t symsize): Output a public definition. Input: seg = segment index that symbol is defined in s . symbol offset = offset of name within segment
Obj_reftocodeseg void Obj_reftocodeseg(int seg, targ_size_t offset, targ_size_t val): Refer to address that is in the current function code (funcsym_p). Only offsets are output, regardless of the memory model. Used to put values in switch address tables. Input: seg = where the address is going (CODE or DATA) offset = offset within seg val = displacement from start of this module
Obj_reftodatseg void Obj_reftodatseg(int seg, targ_size_t offset, targ_size_t val, uint targetdatum, int flags): Refer to address that is in the data segment. Input: seg:offset = the address being fixed up val = displacement from start of target segment targetdatum = target segment number (DATA, CDATA or UDATA, etc.) flags = CFoff, CFseg
Obj_reftoident int Obj_reftoident(int seg, targ_size_t offset, Symbol* s, targ_size_t val, int flags): Refer to an identifier. Input: seg = where the address is going (CODE or DATA) offset = offset within seg s . Symbol table entry for identifier val = displacement from identifier flags = CFselfrel: self-relative CFseg: get segment CFoff: get offset CFpc32: RIP addressing, val is 0, -1, -2 or -4 CFoffset64: 8 byte offset for 64 bit builds
Obj_setModuleCtorDtor void Obj_setModuleCtorDtor(Symbol* sfunc, bool isCtor): Stuff pointer to function in its own segment. Used for static ctor and dtor lists.
Obj_setcodeseg void Obj_setcodeseg(int seg): Reset code seg to existing seg. Used after a COMDAT for a function is done.
Obj_startaddress void Obj_startaddress(Symbol* s): Set start address
Obj_staticctor void Obj_staticctor(Symbol* s, int, int): Symbol is the function that calls the static constructors. Put a pointer to it into a special segment that the startup code looks at. Input: s static constructor function dtor !=0 if leave space for static destructor seg 1: user 2: lib 3: compiler
Obj_staticdtor void Obj_staticdtor(Symbol* s): Symbol is the function that calls the static destructors. Put a pointer to it into a special segment that the exit code looks at. Input: s static destructor function
Obj_string_literal_segment int Obj_string_literal_segment(uint sz): Get segment for readonly string literals. The linker will pool strings in this section.
Obj_sym_cdata Symbol* Obj_sym_cdata(tym_t ty, char* p, int len): Ouput read only data and generate a symbol for it.
Obj_term void Obj_term(const(char)* objfilename): Terminate package.
Obj_termfile void Obj_termfile(): Fixup and terminate object file.
Obj_tlsseg seg_data* Obj_tlsseg(): Define segments for Thread Local Storage for 32bit. Output: seg_tlsseg set to segment number for TLS segment.
Obj_tlsseg_bss seg_data* Obj_tlsseg_bss(): Define segments for Thread Local Storage. Output: seg_tlsseg_bss set to segment number for TLS segment.
Obj_tlsseg_data seg_data* Obj_tlsseg_data(): Define segments for Thread Local Storage data. Output: seg_tlsseg_data set to segment number for TLS data segment.
Obj_tlv_bootstrap Symbol* Obj_tlv_bootstrap(): Returns the symbol for the __tlv_bootstrap function.
Obj_user void Obj_user(const(char)* p): Embed string in obj.
Obj_wkext void Obj_wkext(Symbol* s1, Symbol* s2): Output a weak extern record.
Obj_write_byte void Obj_write_byte(seg_data* pseg, uint byte_): Append byte to segment.
Obj_write_bytes void Obj_write_bytes(seg_data* pseg, uint nbytes, void* p): Append bytes to segment.
Obj_write_zeros void Obj_write_zeros(seg_data* pseg, targ_size_t count): Append an iterated data block of 0s. (uninitialized data only)
dwarf_eh_frame_fixup int dwarf_eh_frame_fixup(int dfseg, targ_size_t offset, Symbol* s, targ_size_t val, Symbol* fdesym): Generate LSDA and PC_Begin fixups in the __eh_frame segment encoded as DW_EH_PE_pcrel|ptr. 64 bits LSDA [0] address x0071 symbolnum 6 pcrel 0 length 3 extern 1 type 5 RELOC_SUBTRACTOR __Z3foov.eh [1] address x0071 symbolnum 1 pcrel 0 length 3 extern 1 type 0 RELOC_UNSIGNED GCC_except_table2
dwarf_reftoident int dwarf_reftoident(int seg, targ_size_t offset, Symbol* s, targ_size_t val): Generate fixup specific to .eh_frame and .gcc_except_table sections.
elf_align int elf_align(targ_size_t size, int foffset): Write to the object file
mach_numbersyms void mach_numbersyms(): Number symbols so they are ordered as locals, public and then extern/comdef
obj_filename void obj_filename(const(char)* modname): Output file name record.
obj_mangle2 char* obj_mangle2(Symbol* s, char* dest): Mangle a name.
objfile_delete void objfile_delete(): Close and delete .OBJ file.
objfile_term void objfile_term(): Terminate.
patchAddr int32_t* patchAddr(int seg, targ_size_t offset): Patch pseg/offset by adding in the vmaddr difference from pseg/offset to start of seg.
seg_data_isCode int seg_data_isCode(const ref seg_data sd): Returns !=0 if this segment is a code segment.

Static variables

seg_tlsseg int seg_tlsseg;: Section index for the __thread_vars/__tls_data section.
seg_tlsseg_bss int seg_tlsseg_bss;: Section index for the __thread_bss section.
seg_tlsseg_data int seg_tlsseg_data;: Section index for the __thread_data section.

Structs

Relocation struct Relocation: Because the Mach-O relocations cannot be computed until after all the segments are written out, and we need more information than the Mach-O relocations provide, make our own relocation type. Later, translate to Mach-O relocation structure.

dmd.backend.machobj

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