sysexit() now overrides all registers

when doing anything more complex than starting a new program, you pretty
much need to pass a full register dump. otherwise stuff will break

1 files changed, 21 insertions, 0 deletions

diff --git a/src/kernel/arch/i386/sysenter.c b/src/kernel/arch/i386/sysenter.c
index 91dac2e..f3f5987 100644
--- a/src/kernel/arch/i386/sysenter.c
+++ b/src/kernel/arch/i386/sysenter.c
@@ -1,6 +1,27 @@
 #include <kernel/arch/generic.h>
 #include <kernel/proc.h>
 
+struct registers_pushad _sysexit_regs; // a hack
+
+extern void _sysexit_real();
+
+void sysexit(struct registers regs) {
+	_sysexit_regs = (struct registers_pushad) {
+		.eax = regs.eax,
+		.ebx = regs.ebx,
+		.ebp = regs.ebp,
+		.esi = regs.esi,
+		.edi = regs.edi,
+
+		// sysexit args
+		.ecx = regs.esp,
+		.edx = regs.eip,
+
+		// ESP doesn't matter
+	};
+	_sysexit_real();
+}
+
 void sysenter_stage2(int edi, int esi, void *ebp, void *esp,
                      int ebx, int edx, int   ecx, int   eax)
 {