From 164c2e93195e92bfaaf3ce5371473c27a8918e0e Mon Sep 17 00:00:00 2001 From: "Jan (janneke) Nieuwenhuizen" Date: Tue, 13 Sep 2022 13:52:03 +0200 Subject: [PATCH] ARM: Use explicit remainder in __mesabi_uldiv call. This inexplicably fixes a segfault in tcc-boot0. * module/mescc/armv4/as.scm (armv4:r0/r1): Instead of using "push 0", use explicit slot for remainder. --- module/mescc/armv4/as.scm | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/module/mescc/armv4/as.scm b/module/mescc/armv4/as.scm index 3787c9be..8975cc8f 100644 --- a/module/mescc/armv4/as.scm +++ b/module/mescc/armv4/as.scm @@ -369,10 +369,13 @@ `(,(string-append "push___%" r0)) (armv4:call-label #f "__mesabi_idiv" 2)) ;; __mesabi_uldiv(a, b, remainderp) - (cons* `(,(string-append "push___0")) - `(,(string-append "push___%" r1)) - `(,(string-append "push___%" r0)) - (armv4:call-label #f "__mesabi_uldiv" 3))))) + (append `(("push___%r3") ; slot for remainder + ("mov____%esp,%r3") + ("push___%r3") ; pointer to remainder + (,(string-append "push___%" r1)) + (,(string-append "push___%" r0))) + (armv4:call-label #f "__mesabi_uldiv" 3) + `(("pop____%r3")))))) (define (armv4:r0%r1 info signed?) (let ((r0 (get-r0 info))