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compiler: Explicitly specify ABI for arm, mips, and powerpc when talking to LLVM.

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See 652c5151429e279f70396ee601416c87a70c1bec. Better to avoid relying on default
LLVM behavior going forward.
This commit is contained in:
Alex Rønne Petersen 2025-01-24 04:27:00 +01:00
parent b95081209a
commit cd8c92fc40
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1 changed files with 15 additions and 10 deletions
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25
src/target.zig
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@ -482,16 +482,6 @@ pub fn arePointersLogical(target: std.Target, as: AddressSpace) bool {
}
pub fn llvmMachineAbi(target: std.Target) ?[:0]const u8 {
// This special-casing should be removed with LLVM 20.
switch (target.cpu.arch) {
.mips, .mipsel => return "o32",
.mips64, .mips64el => return switch (target.abi) {
.gnuabin32, .muslabin32 => "n32",
else => "n64",
},
else => {},
}
// LLD does not support ELFv1. Rather than having LLVM produce ELFv1 code and then linking it
// into a broken ELFv2 binary, just force LLVM to use ELFv2 as well. This will break when glibc
// is linked as glibc only supports ELFv2 for little endian, but there's nothing we can do about
@ -501,6 +491,7 @@ pub fn llvmMachineAbi(target: std.Target) ?[:0]const u8 {
if (target.cpu.arch == .powerpc64) return "elfv2";
return switch (target.cpu.arch) {
.arm, .armeb, .thumb, .thumbeb => "aapcs",
// TODO: `muslsf` and `muslf32` in LLVM 20.
.loongarch64 => switch (target.abi) {
.gnusf => "lp64s",
@ -512,6 +503,20 @@ pub fn llvmMachineAbi(target: std.Target) ?[:0]const u8 {
.gnuf32 => "ilp32f",
else => "ilp32d",
},
.mips, .mipsel => "o32",
.mips64, .mips64el => switch (target.abi) {
.gnuabin32, .muslabin32 => "n32",
else => "n64",
},
.powerpc64 => switch (target.os.tag) {
.freebsd => if (target.os.version_range.semver.isAtLeast(.{ .major = 13, .minor = 0, .patch = 0 }) orelse false)
"elfv2"
else
"elfv1",
.openbsd => "elfv2",
else => if (target.abi.isMusl()) "elfv2" else "elfv1",
},
.powerpc64le => "elfv2",
.riscv64 => b: {
const featureSetHas = std.Target.riscv.featureSetHas;
break :b if (featureSetHas(target.cpu.features, .e))