Add NetBSD support

Author: jart

README.md

@@ -518,7 +518,7 @@ ape.phdrs:
 	.quad	0				# p_memsz
 	.quad	16				# p_align
 	.align	__SIZEOF_POINTER__
-	.long	PT_NOTE				# openbsd note
+	.long	PT_NOTE				# notes
 	.long	PF_R
 	.stub	.Lape.note.offset,quad
 	.stub	.Lape.note.vaddr,quad
@@ -530,15 +530,28 @@ ape.phdrs:
 
 	.section .note.openbsd.ident,"a",@progbits
 .Lopenbsd.ident:
-	.long	8
-	.long	4
-	.long	0x1
-	.asciz	"OpenBSD"
-	.long	0
-	.size	.Lopenbsd.ident,.-.Lopenbsd.ident
+	.long	2f-1f
+	.long	4f-3f
+	.long	1
+1:	.asciz	"OpenBSD"
+2:	.align	4
+3:	.long	0
+4:	.size	.Lopenbsd.ident,.-.Lopenbsd.ident
 	.type	.Lopenbsd.ident,@object
 	.previous
 
+	.section .note.netbsd.ident,"a",@progbits
+.Lnetbsd.ident:
+	.long	2f-1f
+	.long	4f-3f
+	.long	1
+1:	.asciz	"NetBSD"
+2:	.align	4
+3:	.long	901000000
+4:	.size	.Lnetbsd.ident,.-.Lnetbsd.ident
+	.type	.Lnetbsd.ident,@object
+	.previous
+
 /*	                                      ▄▄███▄
 	                                  ▄▄████████▄
 	                               ▄█████████████▄

ape/ape.S

@@ -227,6 +227,7 @@ SECTIONS {
     . = ALIGN(. != 0 ? __SIZEOF_POINTER__ : 1);
     HIDDEN(.Lape.note = .);
     KEEP(*(.note.openbsd.ident))
+    KEEP(*(.note.netbsd.ident))
     HIDDEN(.Lape.note.end = .);
     . += 1;
 

ape/ape.lds

@@ -70,6 +70,12 @@ static textstartup void __stat2linux_openbsd(union metastat *ms) {
              st_ctim);
 }
 
+static textstartup void __stat2linux_netbsd(union metastat *ms) {
+  SWITCHEROO(ms->netbsd, ms->linux, st_dev, st_ino, st_nlink, st_mode, st_uid,
+             st_gid, st_rdev, st_size, st_blksize, st_blocks, st_atim, st_mtim,
+             st_ctim);
+}
+
 /**
  * Transcodes “The Dismal Data Structure” from BSD→Linux ABI.
  * @asyncsignalsafe
@@ -82,6 +88,8 @@ textstartup void __stat2linux(void *ms) {
       __stat2linux_freebsd((union metastat *)ms);
     } else if (SupportsOpenbsd() && IsOpenbsd()) {
       __stat2linux_openbsd((union metastat *)ms);
+    } else if (SupportsNetbsd() && IsNetbsd()) {
+      __stat2linux_netbsd((union metastat *)ms);
     }
   }
 }

libc/calls/stat2linux.c

@@ -47,11 +47,24 @@ struct stat_openbsd {
   struct timespec __st_birthtim;
 };
 
+struct stat_netbsd {
+  uint64_t st_dev;
+  uint32_t st_mode;
+  uint64_t st_ino;
+  uint32_t st_nlink, st_uid, st_gid;
+  uint64_t st_rdev;
+  struct timespec st_atim, st_mtim, st_ctim, st_birthtim;
+  int64_t st_size, st_blocks;
+  int32_t st_blksize;
+  uint32_t st_flags, st_gen, st_spare[2];
+};
+
 union metastat {
   struct stat linux;
   struct stat_xnu xnu;
   struct stat_freebsd freebsd;
   struct stat_openbsd openbsd;
+  struct stat_netbsd netbsd;
 };
 
 COSMOPOLITAN_C_END_

libc/calls/struct/metastat.internal.h

@@ -0,0 +1,18 @@
+#ifndef COSMOPOLITAN_LIBC_CALLS_STRUCT_SIGACTION_NETBSD_H_
+#define COSMOPOLITAN_LIBC_CALLS_STRUCT_SIGACTION_NETBSD_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+COSMOPOLITAN_C_START_
+
+struct sigset_netbsd {
+  uint32_t sig[4];
+};
+
+struct sigaction_netbsd {
+  intptr_t sa_handler;
+  struct sigset_netbsd sa_mask;
+  uint32_t sa_flags;
+};
+
+COSMOPOLITAN_C_END_
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_CALLS_STRUCT_SIGACTION_NETBSD_H_ */

libc/calls/struct/sigaction-netbsd.h

@@ -8,26 +8,18 @@
 #ifndef SUPPORT_VECTOR
 /**
  * Supported Platforms Tuning Knob (Runtime & Compile-Time)
- *
- * Cosmopolitan's design allows us to support eight platforms. We enable
- * them all by default, since we're able to do eight so efficiently. We
- * can't do more, due to the way the 80x86 instruction set is encoded.
- *
- * The user may optionally tune this bitmask, which effectively asks the
- * compiler to leave out system call polyfills for a platform, which may
- * offer marginal improvements in terms of code size and performance, at
- * the cost of portability.
+ * Tuning this bitmask will remove platform polyfills at compile-time.
  */
 #define SUPPORT_VECTOR 0b11111111
 #endif
+
 #define LINUX   1
 #define METAL   2
 #define WINDOWS 4
 #define XNU     8
 #define OPENBSD 16
 #define FREEBSD 32
-/* #define YOUR_CLOUD_PLATFORM_HERE 64  /\* [email protected] *\/ */
-/* #define YOUR_CLOUD_PLATFORM_HERE 128 /\* [email protected] *\/ */
+#define NETBSD  64
 
 #ifdef NDEBUG
 #define NoDebug() 1
@@ -89,28 +81,31 @@
 #define SupportsXnu()     ((SUPPORT_VECTOR & XNU) == XNU)
 #define SupportsFreebsd() ((SUPPORT_VECTOR & FREEBSD) == FREEBSD)
 #define SupportsOpenbsd() ((SUPPORT_VECTOR & OPENBSD) == OPENBSD)
-#define SupportsBsd()     (!!(SUPPORT_VECTOR & (XNU | FREEBSD | OPENBSD)))
+#define SupportsNetbsd()  ((SUPPORT_VECTOR & NETBSD) == NETBSD)
+#define SupportsBsd()     (!!(SUPPORT_VECTOR & (XNU | FREEBSD | OPENBSD | NETBSD)))
 #define SupportsSystemv() \
-  ((SUPPORT_VECTOR & (LINUX | METAL | XNU | OPENBSD | FREEBSD)) != 0)
+  ((SUPPORT_VECTOR & (LINUX | METAL | XNU | OPENBSD | FREEBSD | NETBSD)) != 0)
 
 #ifndef __ASSEMBLER__
 #define __HOSTOS    (__hostos & SUPPORT_VECTOR)
 #define IsLinux()   ((__HOSTOS & LINUX) == LINUX)
 #define IsMetal()   ((__HOSTOS & METAL) == METAL)
 #define IsWindows() ((__HOSTOS & WINDOWS) == WINDOWS)
-#define IsBsd()     ((__HOSTOS & (XNU | FREEBSD | OPENBSD)) != 0)
+#define IsBsd()     ((__HOSTOS & (XNU | FREEBSD | OPENBSD | NETBSD)) != 0)
 #define IsXnu()     ((__HOSTOS & XNU) == XNU)
 #define IsFreebsd() ((__HOSTOS & FREEBSD) == FREEBSD)
 #define IsOpenbsd() ((__HOSTOS & OPENBSD) == OPENBSD)
+#define IsNetbsd()  ((__HOSTOS & NETBSD) == NETBSD)
 #else
 /* clang-format off */
 #define IsLinux() $LINUX,__hostos(%rip)
 #define IsMetal() $METAL,__hostos(%rip)
 #define IsWindows() $WINDOWS,__hostos(%rip)
-#define IsBsd() $XNU|FREEBSD|OPENBSD,__hostos(%rip)
+#define IsBsd() $XNU|FREEBSD|OPENBSD|NETBSD,__hostos(%rip)
 #define IsXnu() $XNU,__hostos(%rip)
 #define IsFreebsd() $FREEBSD,__hostos(%rip)
 #define IsOpenbsd() $OPENBSD,__hostos(%rip)
+#define IsNetbsd() $NETBSD,__hostos(%rip)
 /* clang-format on */
 #endif
 

libc/dce.h

@@ -88,9 +88,9 @@ static long __pflink(long x) {
   x |= kCp437[0];
   x |= ntoa(0, 0, 0, 0, 0, 0, 0, 0, 0);
   x |= ftoa(0, 0, 0, 0, 0, 0);
-  x |= strnwidth(0, 0);
-  x |= strnwidth16(0, 0);
-  x |= wcsnwidth(0, 0);
+  x |= strnwidth(0, 0, 0);
+  x |= strnwidth16(0, 0, 0);
+  x |= wcsnwidth(0, 0, 0);
   x |= malloc(0);
   x |= __grow(0, 0, 0, 0);
   x |= (intptr_t)strerror(0);

libc/fmt/pflink.h

@@ -144,14 +144,14 @@ int stoa(int out(long, void *), void *arg, void *data, unsigned long flags,
     w = precision;
     if (signbit == 63) {
       if (weaken(wcsnwidth)) {
-        w = weaken(wcsnwidth)((const wchar_t *)p, precision);
+        w = weaken(wcsnwidth)((const wchar_t *)p, precision, 0);
       }
     } else if (signbit == 15) {
       if (weaken(strnwidth16)) {
-        w = weaken(strnwidth16)((const char16_t *)p, precision);
+        w = weaken(strnwidth16)((const char16_t *)p, precision, 0);
       }
     } else if (weaken(strnwidth)) {
-      w = weaken(strnwidth)(p, precision);
+      w = weaken(strnwidth)(p, precision, 0);
     }
     if (w < width) {
       pad = width - w;

libc/fmt/stoa.c

@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/macros.h"
 #include "libc/str/str.h"
 
 /**