sparc64: fix sign extension bug of syscall args for sparc personality

* linux/sparc64/get_syscall_args.c (get_syscall_args): Zero-extend
syscall args from 32 bit for sparc personality.

diff --git a/linux/sparc64/get_syscall_args.c b/linux/sparc64/get_syscall_args.c
index 821c33139fc7a6f3609fc155b9ad22d71ff3e1de..8d29785fa082b0ea0e46e0dbe3bd75a4870720e0 100644 (file)
--- a/linux/sparc64/get_syscall_args.c
+++ b/linux/sparc64/get_syscall_args.c
@@ -1 +1,27 @@
-#include "sparc/get_syscall_args.c"
+/* Return -1 on error or 1 on success (never 0!). */
+static int
+get_syscall_args(struct tcb *tcp)
+{
+       if (tcp->currpers == 1) {
+               /*
+                * Zero-extend from 32 bits.
+                * Use widen_to_long(tcp->u_arg[N]) in syscall handlers
+                * if you need to use *sign-extended* parameter.
+                */
+               tcp->u_arg[0] = (long) (uint32_t) sparc_regs.u_regs[U_REG_O0 + 0];
+               tcp->u_arg[1] = (long) (uint32_t) sparc_regs.u_regs[U_REG_O0 + 1];
+               tcp->u_arg[2] = (long) (uint32_t) sparc_regs.u_regs[U_REG_O0 + 2];
+               tcp->u_arg[3] = (long) (uint32_t) sparc_regs.u_regs[U_REG_O0 + 3];
+               tcp->u_arg[4] = (long) (uint32_t) sparc_regs.u_regs[U_REG_O0 + 4];
+               tcp->u_arg[5] = (long) (uint32_t) sparc_regs.u_regs[U_REG_O0 + 5];
+       } else {
+               tcp->u_arg[0] = sparc_regs.u_regs[U_REG_O0 + 0];
+               tcp->u_arg[1] = sparc_regs.u_regs[U_REG_O0 + 1];
+               tcp->u_arg[2] = sparc_regs.u_regs[U_REG_O0 + 2];
+               tcp->u_arg[3] = sparc_regs.u_regs[U_REG_O0 + 3];
+               tcp->u_arg[4] = sparc_regs.u_regs[U_REG_O0 + 4];
+               tcp->u_arg[5] = sparc_regs.u_regs[U_REG_O0 + 5];
+       }
+
+       return 1;
+}