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authorAndrew Waterman <waterman@cs.berkeley.edu>2014-10-31 22:40:06 -0700
committerAndrew Waterman <waterman@cs.berkeley.edu>2014-10-31 22:40:06 -0700
commit069bdd3f0d1348e079221d62bdc1bd2f1bc33841 (patch)
treea18c2dba9d724197dfb18d9faee474c350fc1b87 /pk/handlers.c
parent514adef4868460944738f39734f282dc14e4d744 (diff)
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Implement draft of new calling convention
Here is the new syscall ABI: syscall number in a7 args in a0 - a6 return value in a0 Here is the integer register map: x0 -> x0 x1 -> ra x2 -> sp x3 -> tp x4 -> gp x5 -> t0 x6 -> t1 x7 -> t2 x8 -> s0 x9 -> s1 x10 -> a0 x11 -> a1 x12 -> a2 x13 -> a3 x14 -> a4 x15 -> a5 x16 -> a6 x17 -> a7 x18 -> s2 x19 -> s3 x20 -> s4 x21 -> s5 x22 -> s6 x23 -> s7 x24 -> s8 x25 -> s9 x26 -> s10 x27 -> s11 x28 -> t3 x29 -> t4 x30 -> t5 x31 -> t6
Diffstat (limited to 'pk/handlers.c')
-rw-r--r--pk/handlers.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/pk/handlers.c b/pk/handlers.c
index 2d5356a..2b5bf22 100644
--- a/pk/handlers.c
+++ b/pk/handlers.c
@@ -112,8 +112,8 @@ void handle_fault_store(trapframe_t* tf)
static void handle_syscall(trapframe_t* tf)
{
- tf->gpr[16] = do_syscall(tf->gpr[18], tf->gpr[19], tf->gpr[20], tf->gpr[21],
- tf->gpr[22], tf->gpr[23], tf->gpr[16]);
+ tf->gpr[10] = do_syscall(tf->gpr[10], tf->gpr[11], tf->gpr[12], tf->gpr[13],
+ tf->gpr[14], tf->gpr[15], tf->gpr[17]);
tf->epc += 4;
}