Add FreeBSD

src/asm_based.rs

@@ -155,6 +155,7 @@ where
         extern "C" {
             #[cfg_attr(target_os = "macos", link_name = "_setjmp")]
             #[cfg_attr(target_os = "linux", link_name = "_setjmp")]
+            #[cfg_attr(target_os = "freebsd", link_name = "setjmp")]
             fn find_your_targets_setjmp(env: JmpBuf) -> c_int;
         }
         let setjmp = find_your_targets_setjmp;
@@ -207,6 +208,7 @@ where
         extern "C" {
             #[cfg_attr(target_os = "macos", link_name = "sigsetjmp")]
             #[cfg_attr(target_os = "linux", link_name = "__sigsetjmp")]
+            #[cfg_attr(target_os = "freebsd", link_name = "sigsetjmp")]
             fn find_your_targets_sigsetjmp(env: SigJmpBuf, savemask: c_int) -> c_int;
         }
         let sigsetjmp = find_your_targets_sigsetjmp;

src/freebsd_compat.rs

@@ -0,0 +1,27 @@
+use core::marker::PhantomData;
+
+#[cfg(target_arch = "aarch64")]
+const JMP_BUF_SIZE: usize = 32 * 4;
+#[cfg(target_arch = "x86_64")]
+const JMP_BUF_SIZE: usize = 12 * 2;
+#[cfg(target_arch = "riscv64")]
+const JMP_BUF_SIZE: usize = 64 * 2;
+
+/// `JmpBufFields` are the accessible fields when viewed via a JmpBuf pointer.
+/// But also: You shouldn't be poking at these!
+#[repr(C)]
+pub struct JmpBufFields {
+    _buf: [u32; JMP_BUF_SIZE],
+    _neither_send_nor_sync: PhantomData<*const u8>,
+}
+
+/// `SigJmpBufFields` are the accessible fields when viewed via a SigJmpBuf pointer.
+/// But also: You shouldn't be poking at these!
+#[repr(C)]
+pub struct SigJmpBufFields {
+    _buf: [u32; JMP_BUF_SIZE],
+    _neither_send_nor_sync: PhantomData<*const u8>,
+}
+
+pub type JmpBufStruct = JmpBufFields;
+pub type SigJmpBufStruct = SigJmpBufFields;

src/lib.rs

@@ -182,10 +182,14 @@ use libc::c_int;
 mod glibc_compat;
 #[cfg_attr(not(target_os = "macos"), allow(dead_code))]
 mod macos_compat;
+#[cfg_attr(not(target_os = "freebsd"), allow(dead_code))]
+mod freebsd_compat;
 #[cfg(target_os = "linux")]
 use glibc_compat as struct_defs;
 #[cfg(target_os = "macos")]
 use macos_compat as struct_defs;
+#[cfg(target_os = "freebsd")]
+use freebsd_compat as struct_defs;
 
 pub use crate::struct_defs::{JmpBufFields, JmpBufStruct};
 pub use crate::struct_defs::{SigJmpBufFields, SigJmpBufStruct};