diff options
Diffstat (limited to 'lib/Target/ARM/ARMTargetAsmInfo.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMTargetAsmInfo.cpp | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMTargetAsmInfo.cpp b/lib/Target/ARM/ARMTargetAsmInfo.cpp new file mode 100644 index 000000000000..4107dccd2a69 --- /dev/null +++ b/lib/Target/ARM/ARMTargetAsmInfo.cpp @@ -0,0 +1,291 @@ +//===-- ARMTargetAsmInfo.cpp - ARM asm properties ---------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the declarations of the ARMTargetAsmInfo properties. +// +//===----------------------------------------------------------------------===// + +#include "ARMTargetAsmInfo.h" +#include "ARMTargetMachine.h" +#include <cstring> +#include <cctype> +using namespace llvm; + + +const char *const llvm::arm_asm_table[] = { + "{r0}", "r0", + "{r1}", "r1", + "{r2}", "r2", + "{r3}", "r3", + "{r4}", "r4", + "{r5}", "r5", + "{r6}", "r6", + "{r7}", "r7", + "{r8}", "r8", + "{r9}", "r9", + "{r10}", "r10", + "{r11}", "r11", + "{r12}", "r12", + "{r13}", "r13", + "{r14}", "r14", + "{lr}", "lr", + "{sp}", "sp", + "{ip}", "ip", + "{fp}", "fp", + "{sl}", "sl", + "{memory}", "memory", + "{cc}", "cc", + 0,0}; + +ARMDarwinTargetAsmInfo::ARMDarwinTargetAsmInfo(const ARMTargetMachine &TM): + ARMTargetAsmInfo<DarwinTargetAsmInfo>(TM) { + Subtarget = &TM.getSubtarget<ARMSubtarget>(); + + GlobalPrefix = "_"; + PrivateGlobalPrefix = "L"; + LessPrivateGlobalPrefix = "l"; + StringConstantPrefix = "\1LC"; + BSSSection = 0; // no BSS section + ZeroDirective = "\t.space\t"; + ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill + SetDirective = "\t.set\t"; + WeakRefDirective = "\t.weak_reference\t"; + WeakDefDirective = "\t.weak_definition "; + HiddenDirective = "\t.private_extern\t"; + ProtectedDirective = NULL; + JumpTableDataSection = ".const"; + CStringSection = "\t.cstring"; + HasDotTypeDotSizeDirective = false; + HasSingleParameterDotFile = false; + NeedsIndirectEncoding = true; + if (TM.getRelocationModel() == Reloc::Static) { + StaticCtorsSection = ".constructor"; + StaticDtorsSection = ".destructor"; + } else { + StaticCtorsSection = ".mod_init_func"; + StaticDtorsSection = ".mod_term_func"; + } + + // In non-PIC modes, emit a special label before jump tables so that the + // linker can perform more accurate dead code stripping. + if (TM.getRelocationModel() != Reloc::PIC_) { + // Emit a local label that is preserved until the linker runs. + JumpTableSpecialLabelPrefix = "l"; + } + + NeedsSet = true; + DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug"; + DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug"; + DwarfLineSection = ".section __DWARF,__debug_line,regular,debug"; + DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug"; + DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug"; + DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug"; + DwarfStrSection = ".section __DWARF,__debug_str,regular,debug"; + DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug"; + DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug"; + DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug"; + DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug"; +} + +ARMELFTargetAsmInfo::ARMELFTargetAsmInfo(const ARMTargetMachine &TM): + ARMTargetAsmInfo<ELFTargetAsmInfo>(TM) { + Subtarget = &TM.getSubtarget<ARMSubtarget>(); + + NeedsSet = false; + HasLEB128 = true; + AbsoluteDebugSectionOffsets = true; + CStringSection = ".rodata.str"; + PrivateGlobalPrefix = ".L"; + WeakRefDirective = "\t.weak\t"; + SetDirective = "\t.set\t"; + DwarfRequiresFrameSection = false; + DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",%progbits"; + DwarfInfoSection = "\t.section\t.debug_info,\"\",%progbits"; + DwarfLineSection = "\t.section\t.debug_line,\"\",%progbits"; + DwarfFrameSection = "\t.section\t.debug_frame,\"\",%progbits"; + DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",%progbits"; + DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",%progbits"; + DwarfStrSection = "\t.section\t.debug_str,\"\",%progbits"; + DwarfLocSection = "\t.section\t.debug_loc,\"\",%progbits"; + DwarfARangesSection = "\t.section\t.debug_aranges,\"\",%progbits"; + DwarfRangesSection = "\t.section\t.debug_ranges,\"\",%progbits"; + DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",%progbits"; + + if (Subtarget->isAAPCS_ABI()) { + StaticCtorsSection = "\t.section .init_array,\"aw\",%init_array"; + StaticDtorsSection = "\t.section .fini_array,\"aw\",%fini_array"; + } else { + StaticCtorsSection = "\t.section .ctors,\"aw\",%progbits"; + StaticDtorsSection = "\t.section .dtors,\"aw\",%progbits"; + } +} + +/// Count the number of comma-separated arguments. +/// Do not try to detect errors. +template <class BaseTAI> +unsigned ARMTargetAsmInfo<BaseTAI>::countArguments(const char* p) const { + unsigned count = 0; + while (*p && isspace(*p) && *p != '\n') + p++; + count++; + while (*p && *p!='\n' && + strncmp(p, BaseTAI::CommentString, + strlen(BaseTAI::CommentString))!=0) { + if (*p==',') + count++; + p++; + } + return count; +} + +/// Count the length of a string enclosed in quote characters. +/// Do not try to detect errors. +template <class BaseTAI> +unsigned ARMTargetAsmInfo<BaseTAI>::countString(const char* p) const { + unsigned count = 0; + while (*p && isspace(*p) && *p!='\n') + p++; + if (!*p || *p != '\"') + return count; + while (*++p && *p != '\"') + count++; + return count; +} + +/// ARM-specific version of TargetAsmInfo::getInlineAsmLength. +template <class BaseTAI> +unsigned ARMTargetAsmInfo<BaseTAI>::getInlineAsmLength(const char *s) const { + // Make a lowercase-folded version of s for counting purposes. + char *q, *s_copy = (char *)malloc(strlen(s) + 1); + strcpy(s_copy, s); + for (q=s_copy; *q; q++) + *q = tolower(*q); + const char *Str = s_copy; + + // Count the number of bytes in the asm. + bool atInsnStart = true; + bool inTextSection = true; + unsigned Length = 0; + for (; *Str; ++Str) { + if (atInsnStart) { + // Skip whitespace + while (*Str && isspace(*Str) && *Str != '\n') + Str++; + // Skip label + for (const char* p = Str; *p && !isspace(*p); p++) + if (*p == ':') { + Str = p+1; + while (*Str && isspace(*Str) && *Str != '\n') + Str++; + break; + } + + if (*Str == 0) break; + + // Ignore everything from comment char(s) to EOL + if (strncmp(Str, BaseTAI::CommentString, + strlen(BaseTAI::CommentString)) == 0) + atInsnStart = false; + // FIXME do something like the following for non-Darwin + else if (*Str == '.' && Subtarget->isTargetDarwin()) { + // Directive. + atInsnStart = false; + + // Some change the section, but don't generate code. + if (strncmp(Str, ".literal4", strlen(".literal4"))==0 || + strncmp(Str, ".literal8", strlen(".literal8"))==0 || + strncmp(Str, ".const", strlen(".const"))==0 || + strncmp(Str, ".constructor", strlen(".constructor"))==0 || + strncmp(Str, ".cstring", strlen(".cstring"))==0 || + strncmp(Str, ".data", strlen(".data"))==0 || + strncmp(Str, ".destructor", strlen(".destructor"))==0 || + strncmp(Str, ".fvmlib_init0", strlen(".fvmlib_init0"))==0 || + strncmp(Str, ".fvmlib_init1", strlen(".fvmlib_init1"))==0 || + strncmp(Str, ".mod_init_func", strlen(".mod_init_func"))==0 || + strncmp(Str, ".mod_term_func", strlen(".mod_term_func"))==0 || + strncmp(Str, ".picsymbol_stub", strlen(".picsymbol_stub"))==0 || + strncmp(Str, ".symbol_stub", strlen(".symbol_stub"))==0 || + strncmp(Str, ".static_data", strlen(".static_data"))==0 || + strncmp(Str, ".section", strlen(".section"))==0 || + strncmp(Str, ".lazy_symbol_pointer", strlen(".lazy_symbol_pointer"))==0 || + strncmp(Str, ".non_lazy_symbol_pointer", strlen(".non_lazy_symbol_pointer"))==0 || + strncmp(Str, ".dyld", strlen(".dyld"))==0 || + strncmp(Str, ".const_data", strlen(".const_data"))==0 || + strncmp(Str, ".objc", strlen(".objc"))==0 || //// many directives + strncmp(Str, ".static_const", strlen(".static_const"))==0) + inTextSection=false; + else if (strncmp(Str, ".text", strlen(".text"))==0) + inTextSection = true; + // Some can't really be handled without implementing significant pieces + // of an assembler. Others require dynamic adjustment of block sizes in + // AdjustBBOffsetsAfter; it's a big compile-time speed hit to check every + // instruction in there, and none of these are currently used in the kernel. + else if (strncmp(Str, ".macro", strlen(".macro"))==0 || + strncmp(Str, ".if", strlen(".if"))==0 || + strncmp(Str, ".align", strlen(".align"))==0 || + strncmp(Str, ".fill", strlen(".fill"))==0 || + strncmp(Str, ".space", strlen(".space"))==0 || + strncmp(Str, ".zerofill", strlen(".zerofill"))==0 || + strncmp(Str, ".p2align", strlen(".p2align"))==0 || + strncmp(Str, ".p2alignw", strlen(".p2alignw"))==0 || + strncmp(Str, ".p2alignl", strlen(".p2alignl"))==0 || + strncmp(Str, ".align32", strlen(".p2align32"))==0 || + strncmp(Str, ".include", strlen(".include"))==0) + cerr << "Directive " << Str << " in asm may lead to invalid offsets for" << + " constant pools (the assembler will tell you if this happens).\n"; + // Some generate code, but this is only interesting in the text section. + else if (inTextSection) { + if (strncmp(Str, ".long", strlen(".long"))==0) + Length += 4*countArguments(Str+strlen(".long")); + else if (strncmp(Str, ".short", strlen(".short"))==0) + Length += 2*countArguments(Str+strlen(".short")); + else if (strncmp(Str, ".byte", strlen(".byte"))==0) + Length += 1*countArguments(Str+strlen(".byte")); + else if (strncmp(Str, ".single", strlen(".single"))==0) + Length += 4*countArguments(Str+strlen(".single")); + else if (strncmp(Str, ".double", strlen(".double"))==0) + Length += 8*countArguments(Str+strlen(".double")); + else if (strncmp(Str, ".quad", strlen(".quad"))==0) + Length += 16*countArguments(Str+strlen(".quad")); + else if (strncmp(Str, ".ascii", strlen(".ascii"))==0) + Length += countString(Str+strlen(".ascii")); + else if (strncmp(Str, ".asciz", strlen(".asciz"))==0) + Length += countString(Str+strlen(".asciz"))+1; + } + } else if (inTextSection) { + // An instruction + atInsnStart = false; + if (Subtarget->isThumb()) { + // BL and BLX <non-reg> are 4 bytes, all others 2. + if (strncmp(Str, "blx", strlen("blx"))==0) { + const char* p = Str+3; + while (*p && isspace(*p)) + p++; + if (*p == 'r' || *p=='R') + Length += 2; // BLX reg + else + Length += 4; // BLX non-reg + } else if (strncmp(Str, "bl", strlen("bl"))==0) + Length += 4; // BL + else + Length += 2; // Thumb anything else + } + else + Length += 4; // ARM + } + } + if (*Str == '\n' || *Str == BaseTAI::SeparatorChar) + atInsnStart = true; + } + free(s_copy); + return Length; +} + +// Instantiate default implementation. +TEMPLATE_INSTANTIATION(class ARMTargetAsmInfo<TargetAsmInfo>); |