commit 9c45a87490dab538ee480549d3194e946f2ae6b2 (tree)
parent 4187d0e8feda7982c1d15a73e99a42cbf4e355e3
Author: Matthew Lugg <mlugg@mlugg.co.uk>
Date: Thu, 13 Nov 2025 10:15:35 +0000
compiler_rt: fix and simplify additional Windows exports
Simplifies the logic, clarifies the comment, and fixes a minor bug,
which is that we exported the Windows ABI name *instead* of the standard
compiler-rt name, but it's meant to be exported *in addition* to the
standard name (this is LLVM's behavior and it is more useful).
Diffstat:
12 files changed, 67 insertions(+), 21 deletions(-)
diff --git a/lib/compiler_rt/arm.zig b/lib/compiler_rt/arm.zig
@@ -15,11 +15,16 @@ comptime {
@export(&__aeabi_unwind_cpp_pr1, .{ .name = "__aeabi_unwind_cpp_pr1", .linkage = common.linkage, .visibility = common.visibility });
@export(&__aeabi_unwind_cpp_pr2, .{ .name = "__aeabi_unwind_cpp_pr2", .linkage = common.linkage, .visibility = common.visibility });
- @export(&__aeabi_ldivmod, .{ .name = if (common.want_windows_arm_abi) "__rt_sdiv64" else "__aeabi_ldivmod", .linkage = common.linkage, .visibility = common.visibility });
- @export(&__aeabi_uldivmod, .{ .name = if (common.want_windows_arm_abi) "__rt_udiv64" else "__aeabi_uldivmod", .linkage = common.linkage, .visibility = common.visibility });
-
- @export(&__aeabi_idivmod, .{ .name = if (common.want_windows_arm_abi) "__rt_sdiv" else "__aeabi_idivmod", .linkage = common.linkage, .visibility = common.visibility });
- @export(&__aeabi_uidivmod, .{ .name = if (common.want_windows_arm_abi) "__rt_udiv" else "__aeabi_uidivmod", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__aeabi_ldivmod, .{ .name = "__rt_sdiv64", .linkage = common.linkage, .visibility = common.visibility });
+ @export(&__aeabi_uldivmod, .{ .name = "__rt_udiv64", .linkage = common.linkage, .visibility = common.visibility });
+ @export(&__aeabi_idivmod, .{ .name = "__rt_sdiv", .linkage = common.linkage, .visibility = common.visibility });
+ @export(&__aeabi_uidivmod, .{ .name = "__rt_udiv", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__aeabi_ldivmod, .{ .name = "__aeabi_ldivmod", .linkage = common.linkage, .visibility = common.visibility });
+ @export(&__aeabi_uldivmod, .{ .name = "__aeabi_uldivmod", .linkage = common.linkage, .visibility = common.visibility });
+ @export(&__aeabi_idivmod, .{ .name = "__aeabi_idivmod", .linkage = common.linkage, .visibility = common.visibility });
+ @export(&__aeabi_uidivmod, .{ .name = "__aeabi_uidivmod", .linkage = common.linkage, .visibility = common.visibility });
@export(&__aeabi_memcpy, .{ .name = "__aeabi_memcpy", .linkage = common.linkage, .visibility = common.visibility });
@export(&__aeabi_memcpy4, .{ .name = "__aeabi_memcpy4", .linkage = common.linkage, .visibility = common.visibility });
diff --git a/lib/compiler_rt/aulldiv.zig b/lib/compiler_rt/aulldiv.zig
@@ -8,7 +8,7 @@ const common = @import("common.zig");
pub const panic = common.panic;
comptime {
- if (arch == .x86 and common.want_windows_msvc_or_itanium_abi and !builtin.link_libc) {
+ if (common.want_windows_x86_msvc_abi) {
// Don't let LLVM apply the stdcall name mangling on those MSVC builtins
@export(&_alldiv, .{ .name = "\x01__alldiv", .linkage = common.linkage, .visibility = common.visibility });
@export(&_aulldiv, .{ .name = "\x01__aulldiv", .linkage = common.linkage, .visibility = common.visibility });
diff --git a/lib/compiler_rt/aullrem.zig b/lib/compiler_rt/aullrem.zig
@@ -8,7 +8,7 @@ const common = @import("common.zig");
pub const panic = common.panic;
comptime {
- if (arch == .x86 and common.want_windows_msvc_or_itanium_abi and !builtin.link_libc) {
+ if (common.want_windows_x86_msvc_abi) {
// Don't let LLVM apply the stdcall name mangling on those MSVC builtins
@export(&_allrem, .{ .name = "\x01__allrem", .linkage = common.linkage, .visibility = common.visibility });
@export(&_aullrem, .{ .name = "\x01__aullrem", .linkage = common.linkage, .visibility = common.visibility });
diff --git a/lib/compiler_rt/common.zig b/lib/compiler_rt/common.zig
@@ -48,13 +48,30 @@ pub const want_aeabi = switch (builtin.abi) {
else => false,
};
-/// These functions are provided by libc when targeting MSVC, but not MinGW.
-// Temporarily used for thumb-uefi until https://github.com/ziglang/zig/issues/21630 is addressed.
-pub const want_windows_arm_abi = builtin.cpu.arch.isArm() and (builtin.os.tag == .windows or builtin.os.tag == .uefi) and (builtin.abi.isGnu() or !builtin.link_libc);
+/// These functions are required on Windows on ARM. They are provided by MSVC libc, but in libc-less
+/// builds or when linking MinGW libc they are our responsibility.
+/// Temporarily used for thumb-uefi until https://github.com/ziglang/zig/issues/21630 is addressed.
+pub const want_windows_arm_abi = e: {
+ if (!builtin.cpu.arch.isArm()) break :e false;
+ switch (builtin.os.tag) {
+ .windows, .uefi => {},
+ else => break :e false,
+ }
+ // The ABI is needed, but it's only our reponsibility if libc won't provide it.
+ break :e builtin.abi.isGnu() or !builtin.link_libc;
+};
-pub const want_windows_msvc_or_itanium_abi = switch (builtin.abi) {
- .none, .msvc, .itanium => builtin.os.tag == .windows,
- else => false,
+/// These functions are required by on Windows on x86 on some ABIs. They are provided by MSVC libc,
+/// but in libc-less builds they are our responsibility.
+pub const want_windows_x86_msvc_abi = e: {
+ if (builtin.cpu.arch != .x86) break :e false;
+ if (builtin.os.tag != .windows) break :e false;
+ switch (builtin.abi) {
+ .none, .msvc, .itanium => {},
+ else => break :e false,
+ }
+ // The ABI is needed, but it's only our responsibility if libc won't provide it.
+ break :e !builtin.link_libc;
};
pub const want_ppc_abi = builtin.cpu.arch.isPowerPC();
diff --git a/lib/compiler_rt/fixdfdi.zig b/lib/compiler_rt/fixdfdi.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_d2lz, .{ .name = "__aeabi_d2lz", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__fixdfdi, .{ .name = if (common.want_windows_arm_abi) "__dtoi64" else "__fixdfdi", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__fixdfdi, .{ .name = "__dtoi64", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__fixdfdi, .{ .name = "__fixdfdi", .linkage = common.linkage, .visibility = common.visibility });
}
}
diff --git a/lib/compiler_rt/fixsfdi.zig b/lib/compiler_rt/fixsfdi.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_f2lz, .{ .name = "__aeabi_f2lz", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__fixsfdi, .{ .name = if (common.want_windows_arm_abi) "__stoi64" else "__fixsfdi", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__fixsfdi, .{ .name = "__stoi64", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__fixsfdi, .{ .name = "__fixsfdi", .linkage = common.linkage, .visibility = common.visibility });
}
}
diff --git a/lib/compiler_rt/fixunsdfdi.zig b/lib/compiler_rt/fixunsdfdi.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_d2ulz, .{ .name = "__aeabi_d2ulz", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__fixunsdfdi, .{ .name = if (common.want_windows_arm_abi) "__dtou64" else "__fixunsdfdi", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__fixunsdfdi, .{ .name = "__dtou64", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__fixunsdfdi, .{ .name = "__fixunsdfdi", .linkage = common.linkage, .visibility = common.visibility });
}
}
diff --git a/lib/compiler_rt/fixunssfdi.zig b/lib/compiler_rt/fixunssfdi.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_f2ulz, .{ .name = "__aeabi_f2ulz", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__fixunssfdi, .{ .name = if (common.want_windows_arm_abi) "__stou64" else "__fixunssfdi", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__fixunssfdi, .{ .name = "__stou64", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__fixunssfdi, .{ .name = "__fixunssfdi", .linkage = common.linkage, .visibility = common.visibility });
}
}
diff --git a/lib/compiler_rt/floatdidf.zig b/lib/compiler_rt/floatdidf.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_l2d, .{ .name = "__aeabi_l2d", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__floatdidf, .{ .name = if (common.want_windows_arm_abi) "__i64tod" else "__floatdidf", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__floatdidf, .{ .name = "__i64tod", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__floatdidf, .{ .name = "__floatdidf", .linkage = common.linkage, .visibility = common.visibility });
}
}
diff --git a/lib/compiler_rt/floatdisf.zig b/lib/compiler_rt/floatdisf.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_l2f, .{ .name = "__aeabi_l2f", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__floatdisf, .{ .name = if (common.want_windows_arm_abi) "__i64tos" else "__floatdisf", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__floatdisf, .{ .name = "__i64tos", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__floatdisf, .{ .name = "__floatdisf", .linkage = common.linkage, .visibility = common.visibility });
}
}
diff --git a/lib/compiler_rt/floatundidf.zig b/lib/compiler_rt/floatundidf.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_ul2d, .{ .name = "__aeabi_ul2d", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__floatundidf, .{ .name = if (common.want_windows_arm_abi) "__u64tod" else "__floatundidf", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__floatundidf, .{ .name = "__u64tod", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__floatundidf, .{ .name = "__floatundidf", .linkage = common.linkage, .visibility = common.visibility });
}
}
diff --git a/lib/compiler_rt/floatundisf.zig b/lib/compiler_rt/floatundisf.zig
@@ -8,7 +8,10 @@ comptime {
if (common.want_aeabi) {
@export(&__aeabi_ul2f, .{ .name = "__aeabi_ul2f", .linkage = common.linkage, .visibility = common.visibility });
} else {
- @export(&__floatundisf, .{ .name = if (common.want_windows_arm_abi) "__u64tos" else "__floatundisf", .linkage = common.linkage, .visibility = common.visibility });
+ if (common.want_windows_arm_abi) {
+ @export(&__floatundisf, .{ .name = "__u64tos", .linkage = common.linkage, .visibility = common.visibility });
+ }
+ @export(&__floatundisf, .{ .name = "__floatundisf", .linkage = common.linkage, .visibility = common.visibility });
}
}
