motiejus/zig
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Implement stack probes for x86/x86_64

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Enabled on non-Windows systems only since it already requires stack
probes.
This commit is contained in:
LemonBoy
2019-05-07 00:49:49 +02:00
committed by Andrew Kelley
parent 24ee765318
commit be7cacfbbe
5 changed files with 239 additions and 110 deletions
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11
src/codegen.cpp
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@@ -399,6 +399,15 @@ static void add_uwtable_attr(CodeGen *g, LLVMValueRef fn_val) {
}
}
static void add_probe_stack_attr(CodeGen *g, LLVMValueRef fn_val) {
// Windows already emits its own stack probes
if (g->zig_target->os != OsWindows &&
(g->zig_target->arch == ZigLLVM_x86 ||
g->zig_target->arch == ZigLLVM_x86_64)) {
addLLVMFnAttrStr(fn_val, "probe-stack", "__zig_probe_stack");
}
}
static LLVMLinkage to_llvm_linkage(GlobalLinkageId id) {
switch (id) {
case GlobalLinkageIdInternal:
@@ -587,6 +596,8 @@ static LLVMValueRef fn_llvm_value(CodeGen *g, ZigFn *fn_table_entry) {
addLLVMFnAttr(fn_table_entry->llvm_value, "sspstrong");
addLLVMFnAttrStr(fn_table_entry->llvm_value, "stack-protector-buffer-size", "4");
}
add_probe_stack_attr(g, fn_table_entry->llvm_value);
}
} else {
maybe_import_dll(g, fn_table_entry->llvm_value, linkage);