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generate PHDRs for each segment

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This commit is contained in:
Wolfgang Thaller 2021-04-19 22:15:12 +02:00
parent 7455b0cd2a
commit 4912a44e49
1 changed files with 25 additions and 9 deletions
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34
Elf2Mac/LdScript.cc
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@ -29,6 +29,11 @@ using std::string;
const char * scriptStart = R"ld(/* ld script for Elf2Mac */
ENTRY( @entryPoint@ )
PHDRS
{
text PT_LOAD;
bss PT_LOAD;
}
SECTIONS
{
)ld";
@ -83,7 +88,7 @@ const char * textSection = R"ld(/* ld script for Elf2Mac */
*/
. = ALIGN(0x4) ;
_etext = . ;
}
} : text
)ld";
const char * scriptEnd = R"ld(
@ -120,7 +125,7 @@ const char * scriptEnd = R"ld(
. = ALIGN(0x4);
_edata = . ;
}
} : @data_segment@
.bss ALIGN(0x4) : {
_sbss = .;
*(.dynsbss)
@ -135,7 +140,7 @@ const char * scriptEnd = R"ld(
*(COMMON)
. = ALIGN(0x10) ;
_ebss = . ;
}
} : @bss_segment@
/* /DISCARD/ : {
*(.debug_info);
*(.debug_abbrev);
@ -158,7 +163,8 @@ void CreateFlatLdScript(std::ostream& out, string entryPoint, bool stripMacsbug)
out << "\t.strippedmacsbugnames 0 (NOLOAD) : { *(.text.*.macsbug) }\n";
out << "\t. = 0;\n";
}
out << boost::replace_all_copy<string>(textSection, "@entryPoint@", entryPoint) << scriptEnd;
out << boost::replace_all_copy<string>(textSection, "@entryPoint@", entryPoint) <<
boost::replace_all_copy<string>(boost::replace_all_copy<string>(scriptEnd, "@data_segment@", "text"), "@bss_segment@", "bss");
}
@ -248,28 +254,38 @@ void SegmentInfo::CreateLdScript(std::ostream &out, string entryPoint)
)ld", "@N@", boost::lexical_cast<string>(id));
}
out << "\t}\n";
out << "\t} : code" << id << "\n";
}
void SegmentMap::CreateLdScript(std::ostream &out, string entryPoint, bool stripMacsbug)
{
int maxId = std::max_element(segments.begin(), segments.end(), [](const auto& a, const auto& b) { return a.id < b.id; })->id;
out << "/* ld script for Elf2Mac */\n";
out << "_MULTISEG_APP = 1;\n";
out << boost::replace_all_copy<string>(scriptStart, "@entryPoint@", entryPoint);
out << "ENTRY( " << entryPoint << " )\n";
out << "PHDRS\n{\n";
for(int id = 1; id <= maxId; id++)
out << "code" << id << " PT_LOAD" << ";\n";
out << "data" << " PT_LOAD" << ";\n";
out << "}\nSECTIONS\n{\n";
if(stripMacsbug)
{
out << "\t.strippedmacsbugnames 0 (NOLOAD) : { *(.text.*.macsbug) }\n";
out << "\t. = 0;\n";
}
int maxId = std::max_element(segments.begin(), segments.end(), [](const auto& a, const auto& b) { return a.id < b.id; })->id;
for(int id = 1; id <= maxId; id++)
out << "\t.code" << id << " : {}\n";
out << "\t.code" << id << " : {} :code" << id << "\n";
out << "\t.data" << " : {} :data" << "\n";
out << "\t.bss" << " : {} :data" << "\n";
for(SegmentInfo& seg: segments)
{
seg.CreateLdScript(out, entryPoint);
}
out << scriptEnd;
out << boost::replace_all_copy<string>(boost::replace_all_copy<string>(scriptEnd, "@data_segment@", "data"), "@bss_segment@", "data");
}