New and improved fork for mips, thanks to the fine folks

at Brecis Communications.

libc/sysdeps/linux/mips/Makefile

@@ -30,7 +30,7 @@ TARGET_MACHINE_TYPE=$(shell $(CC) -dumpmachine)
 CRT0=crt0.S
 CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0))
 
-SSRC=bsd-_setjmp.S bsd-setjmp.S setjmp.S clone.S
+SSRC=bsd-_setjmp.S bsd-setjmp.S setjmp.S clone.S fork.S
 SOBJS=$(patsubst %.S,%.o, $(SSRC))
 
 CSRC=__longjmp.c  brk.c vfork.c setjmp_aux.c _mmap.c pipe.c __syscall_error.c

libc/sysdeps/linux/mips/fork.S

@@ -0,0 +1,65 @@
+#include <features.h>
+
+#define ALIGN   2
+
+/* Note: .abicalls goes at top of routine, and only one of them. */
+#if defined(USER_ABICALLS)
+#define ABISETUP                                \
+        .set    noreorder;                      \
+        .cpload t9;                             \
+        .set    reorder;
+
+        .abicalls
+#else
+#define ABISETUP
+#endif
+
+#ifndef __UCLIBC_USE_UNIFIED_SYSCALL__
+#define SYSCALL__(name)                         \
+        .text;                                  \
+        .align  ALIGN;                          \
+        .globl  name;                           \
+        .ent    name, 0;                        \
+  name: ;                                       \
+        ABISETUP                                \
+        li      v0, __NR_##name ;               \
+        syscall;                                \
+        la      t3, errno;                      \
+        beqz    a3, 1f;                         \
+        negu    a1, v0;                         \
+        sw      a1, 0(t3);                      \
+        li      v0, -1;                         \
+  1: ;                                          \
+        j ra;                                   \
+        .end    name;                           \
+        .size   name,.-name;
+#else   /* Unified syscall */
+#define SYSCALL__(name)                         \
+        .text;                                  \
+/*      .align  ALIGN;*/                        \
+        .globl  name;                           \
+        .ent    name, 0;                        \
+  name: ;                                       \
+        ABISETUP                                \
+        .set    push;                           \
+        .set    noreorder;                      \
+        j       __uClibc_syscall;               \
+        addiu   v0, zero, __NR_##name ;         \
+        .set    pop;                            \
+        .end    name;                           \
+        .size   name,.-name;
+#endif  /* __UCLIBC_USE_UNIFIED_SYSCALL__ */
+
+#undef ALIGN
+#define __ASSEMBLY__
+#include <asm/asm.h>
+#include <asm/unistd.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+/* #include <asm/stackframe.h> */
+
+#undef ALIGN
+#define ALIGN   2
+#define _SYSCALL0(type,name)    SYSCALL__(name)
+_SYSCALL0(pid_t, fork);
+