From 1b7621ad99d352629c096cba40eadc6fb2b0c294 Mon Sep 17 00:00:00 2001 From: Stefan Weil Date: Thu, 13 Sep 2012 19:37:43 +0200 Subject: w64: Fix TCG helper functions with 5 arguments TCG uses 6 registers for function arguments on 64 bit Linux hosts, but only 4 registers on W64 hosts. Commit 2999a0b20074a7e4a58f56572bb1436749368f59 increased the number of arguments for some important helper functions from 4 to 5 which triggered a bug for W64 hosts: QEMU aborts when executing helper_lcall_real in the guest's BIOS because function tcg_target_get_call_iarg_regs_count always returned 6. As W64 has only 4 registers for arguments, the 5th argument must be passed on the stack using a correct stack offset. Signed-off-by: Stefan Weil Signed-off-by: Aurelien Jarno --- tcg/i386/tcg-target.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'tcg/i386/tcg-target.h') diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h index b356d76312..ace63ba37b 100644 --- a/tcg/i386/tcg-target.h +++ b/tcg/i386/tcg-target.h @@ -67,7 +67,11 @@ typedef enum { /* used for function call generation */ #define TCG_REG_CALL_STACK TCG_REG_ESP #define TCG_TARGET_STACK_ALIGN 16 +#if defined(_WIN64) +#define TCG_TARGET_CALL_STACK_OFFSET 32 +#else #define TCG_TARGET_CALL_STACK_OFFSET 0 +#endif /* optional instructions */ #define TCG_TARGET_HAS_div2_i32 1 -- cgit v1.2.3