From: Alan Cox <alan@linux.intel.com>
Date: Thu, 20 Oct 2016 16:46:57 +0000 (+0100)
Subject: 68000: add a sort of vdso over the headers
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=93d8b70bf55f73d3a902ff8f88af4ffab0f37e6f;p=FUZIX.git

68000: add a sort of vdso over the headers

This lets us change the trap# and the like if we make syscalls call the stub
handler, and also lets us put the signal unwinder somewhere useful

Experimenting for now
---

diff --git a/Kernel/include/kernel32.h b/Kernel/include/kernel32.h
index e1c6924a..2b9cf7a8 100644
--- a/Kernel/include/kernel32.h
+++ b/Kernel/include/kernel32.h
@@ -20,5 +20,6 @@ extern uaddr_t pagemap_base(void);
 extern uint32_t ugetl(void *uaddr, int *err);
 extern int uputl(uint32_t val, void *uaddr);
 
+extern void install_vdso(void);
 
 #endif
diff --git a/Kernel/platform-v68/main.c b/Kernel/platform-v68/main.c
index 4afbb190..7b7e84e8 100644
--- a/Kernel/platform-v68/main.c
+++ b/Kernel/platform-v68/main.c
@@ -59,3 +59,12 @@ arg_t _memfree(void)
 /* Live udata and kernel stack */
 u_block udata_block;
 uint16_t irqstack[128];	/* Used for swapping only */
+
+/* This will belong in the core 68K code once finalized */
+
+void install_vdso(void)
+{
+	extern uint8_t *vdso;
+	/* Should be uput etc */
+	memcpy((void *)udata.u_codebase, vdso, 0x40);
+}