1 files changed, 56 insertions, 0 deletions
diff --git a/libc/i386sys/setjmp3.c b/libc/i386sys/setjmp3.c
new file mode 100644
index 0000000..160795d
--- /dev/null
+++ b/libc/i386sys/setjmp3.c
@@ -0,0 +1,56 @@
+
+#include <setjmp.h>
+
+#if __AS386_32__
+
+int
+setjmp(env)
+jmp_buf env;
+{
+#asm
+export __setjmp
+__setjmp:
+
+  pop	ecx		! PC
+#if __FIRST_ARG_IN_AX__
+  mov	ebx,eax
+#else
+  mov	ebx,esp
+  mov	ebx,[ebx]	! TOS is prt -> env
+#endif
+  mov	[ebx+0],ecx	! PC
+  mov	[ebx+4],esp	! This registers are all that may be constant.
+  mov	[ebx+8],ebp
+  mov	[ebx+12],esi	! Is saving these the "right thing" ?
+  mov	[ebx+16],edi
+  xor	eax,eax
+  jmp	ecx
+#endasm
+}
+
+void
+longjmp(env, rv)
+jmp_buf env;
+int rv;
+{
+#asm
+export __longjmp
+__longjmp:
+
+  pop	ecx	! pc
+#if __FIRST_ARG_IN_AX__
+  mov	ebx,eax	! env->
+#else
+  pop	ebx	! env->
+#endif
+  pop	eax	! rv
+  mov	ecx,[ebx+0]	! PC
+  mov	esp,[ebx+4]
+  mov	ebp,[ebx+8]
+  mov	esi,[ebx+12]
+  mov	edi,[ebx+16]
+  jmp	ecx
+#endasm
+}
+
+#endif