*: use a generic UserRegs type everywhere I'm storing registers

mostly inspired by Plan 9's Ureg, probably obvious from the name

1 files changed, 5 insertions, 2 deletions

diff --git a/src/kernel/arch/generic.h b/src/kernel/arch/generic.h
index a6a14c9..c9431eb 100644
--- a/src/kernel/arch/generic.h
+++ b/src/kernel/arch/generic.h
@@ -27,8 +27,7 @@ uint64_t uptime_ns(void);
 void timer_schedule(Proc *p, uint64_t ns);
 void timer_deschedule(Proc *p);
 
-// src/arch/i386/sysenter.s
-_Noreturn void sysexit(CpuRegs);
+_Noreturn void sysexit(UserRegs *, char sse[512]);
 
 // all of those can allocate memory
 Pagedir *pagedir_new(void);
@@ -52,3 +51,7 @@ int kprintf(const char *fmt, ...);
 
 void *debug_caller(size_t depth);
 void debug_stacktrace(void);
+
+/** "Applies" an UserRegs struct received from userland over another UserRegs
+ * without overriding privileged registers. */
+void regs_safecopy(UserRegs *, const UserRegs *);