mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-03 15:36:21 +00:00
b2dfb89e0e
objects in llvm.used (thanks Anton). Makes visible the magic 'l' prefix for symbols on Darwin which are to be passed through the assembler, then removed at linktime (previously all references to this had been hidden in the ObjC FE code, oh well). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55973 91177308-0d34-0410-b5e6-96231b3b80d8
301 lines
13 KiB
C++
301 lines
13 KiB
C++
//===-- 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;
|
|
|
|
static const char *const 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};
|
|
|
|
ARMTargetAsmInfo::ARMTargetAsmInfo(const ARMTargetMachine &TM) {
|
|
AsmTransCBE = arm_asm_table;
|
|
|
|
AlignmentIsInBytes = false;
|
|
Data64bitsDirective = 0;
|
|
CommentString = "@";
|
|
DataSection = "\t.data";
|
|
ConstantPoolSection = "\t.text\n";
|
|
COMMDirectiveTakesAlignment = false;
|
|
InlineAsmStart = "@ InlineAsm Start";
|
|
InlineAsmEnd = "@ InlineAsm End";
|
|
LCOMMDirective = "\t.lcomm\t";
|
|
}
|
|
|
|
ARMDarwinTargetAsmInfo::ARMDarwinTargetAsmInfo(const ARMTargetMachine &TM):
|
|
ARMTargetAsmInfo(TM), DarwinTargetAsmInfo(TM) {
|
|
Subtarget = &DTM->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";
|
|
HiddenDirective = "\t.private_extern\t";
|
|
ProtectedDirective = NULL;
|
|
JumpTableDataSection = ".const";
|
|
CStringSection = "\t.cstring";
|
|
FourByteConstantSection = "\t.literal4\n";
|
|
EightByteConstantSection = "\t.literal8\n";
|
|
ReadOnlySection = "\t.const\n";
|
|
HasDotTypeDotSizeDirective = 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(TM), ELFTargetAsmInfo(TM) {
|
|
Subtarget = &ETM->getSubtarget<ARMSubtarget>();
|
|
|
|
NeedsSet = false;
|
|
HasLEB128 = true;
|
|
AbsoluteDebugSectionOffsets = true;
|
|
CStringSection = ".rodata.str";
|
|
ReadOnlySection = "\t.section\t.rodata\n";
|
|
FourByteConstantSection = "\t.section\t.rodata.cst4,\"aM\",@progbits,4";
|
|
EightByteConstantSection = "\t.section\t.rodata.cst8,\"aM\",@progbits,8";
|
|
SixteenByteConstantSection = "\t.section\t.rodata.cst16,\"aM\",@progbits,16";
|
|
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";
|
|
}
|
|
TLSDataSection = "\t.section .tdata,\"awT\",%progbits";
|
|
TLSBSSSection = "\t.section .tbss,\"awT\",%nobits";
|
|
}
|
|
|
|
/// Count the number of comma-separated arguments.
|
|
/// Do not try to detect errors.
|
|
unsigned ARMTargetAsmInfo::countArguments(const char* p) const {
|
|
unsigned count = 0;
|
|
while (*p && isspace(*p) && *p != '\n')
|
|
p++;
|
|
count++;
|
|
while (*p && *p!='\n' &&
|
|
strncmp(p, CommentString, strlen(CommentString))!=0) {
|
|
if (*p==',')
|
|
count++;
|
|
p++;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/// Count the length of a string enclosed in quote characters.
|
|
/// Do not try to detect errors.
|
|
unsigned ARMTargetAsmInfo::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.
|
|
unsigned ARMTargetAsmInfo::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;
|
|
}
|
|
// Ignore everything from comment char(s) to EOL
|
|
if (strncmp(Str, CommentString, strlen(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 == SeparatorChar)
|
|
atInsnStart = true;
|
|
}
|
|
free(s_copy);
|
|
return Length;
|
|
}
|