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Added some more PIE/PIC code. Not quite correct yet unfortunately.

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This commit is contained in:
Christoffer Lerno
2020-11-28 22:17:32 +01:00
parent 49006217e8
commit 025c5e6e8a
4 changed files with 47 additions and 7 deletions
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19
src/build/build_options.c
View File

@@ -277,14 +277,29 @@ static void parse_option(void)
build_options.feature.reg_struct_return = true;
return;
}
if (match_shortopt("fpie"))
{
build_options.pie = PIE_SMALL;
return;
}
if (match_shortopt("fPIE"))
{
build_options.pie = PIE_BIG;
return;
}
if (match_shortopt("fno-pie"))
{
build_options.pie = PIE_NONE;
return;
}
if (match_shortopt("fpic"))
{
build_options.pic = SMALL_PIC_USE;
build_options.pic = PIC_SMALL;
return;
}
if (match_shortopt("fPIC"))
{
build_options.pic = BIG_PIC_USE;
build_options.pic = PIC_BIG;
return;
}
if (match_shortopt("fno-pic"))

19
src/build/build_options.h
View File

@@ -88,14 +88,24 @@ typedef enum
SIZE_OPTIMIZATION_TINY = 2, // -Oz
} SizeOptimizationLevel;
// Values correspond to LLVM values.
typedef enum
{
PIC_DEFAULT,
PIC_NONE,
BIG_PIC_USE,
SMALL_PIC_USE,
PIC_DEFAULT = -1,
PIC_NONE = 0,
PIC_SMALL = 1,
PIC_BIG = 2,
} PicGeneration;
// Values correspond to LLVM values
typedef enum
{
PIE_NONE = -1,
PIE_DEFAULT = 0,
PIE_SMALL = 1,
PIE_BIG = 2,
} PieGeneration;
typedef enum
{
DEBUG_INFO_NONE,
@@ -137,6 +147,7 @@ typedef struct
const char* cpu;
const char* target_triple;
PicGeneration pic;
PieGeneration pie;
bool generate_lib;
struct
{

14
src/compiler/llvm_codegen_module.c
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@@ -13,6 +13,20 @@ void gencontext_begin_module(GenContext *context)
context->module = LLVMModuleCreateWithNameInContext(mangled_module_name, context->context);
LLVMSetModuleDataLayout(context->module, target_data_layout());
LLVMSetSourceFileName(context->module, full_path, strlen(context->ast_context->file->full_path));
LLVMTypeRef options_type = LLVMInt8TypeInContext(context->context);
if (build_options.pic == PIC_BIG || build_options.pic == PIC_SMALL)
{
static const char *pic_level = "PIC Level";
LLVMMetadataRef setting = LLVMValueAsMetadata(LLVMConstInt(options_type, build_options.pic, false));
LLVMAddModuleFlag(context->module, LLVMModuleFlagBehaviorOverride, pic_level, strlen(pic_level), setting);
}
if (build_options.pie == PIE_BIG || build_options.pie == PIE_SMALL)
{
static const char *pie_level = "PIE Level";
LLVMMetadataRef setting = LLVMValueAsMetadata(LLVMConstInt(options_type, build_options.pie, false));
LLVMAddModuleFlag(context->module, LLVMModuleFlagBehaviorOverride, pie_level, strlen(pie_level), setting);
}
LLVMSetTarget(context->module, build_target.target_triple);
if (build_options.debug_info != DEBUG_INFO_NONE)

2
src/compiler/target.c
View File

@@ -419,7 +419,7 @@ void target_setup(void)
default:
UNREACHABLE;
}
if (build_options.pic == BIG_PIC_USE || build_options.pic == SMALL_PIC_USE || build_options.generate_lib)
if (build_options.pic == PIC_BIG || build_options.pic == PIC_SMALL || build_options.generate_lib)
{
reloc_mode = LLVMRelocPIC;
}