From: Hirokazu Takata Date: Fri, 6 Jan 2006 08:18:42 +0000 (-0800) Subject: [PATCH] m32r: Update syscall macros for MMU-less targets X-Git-Tag: v2.6.16-rc1~936^2~153 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b5b776aa5730cbda9cba84ba0f8ccd53a775797;p=linux-2.6 [PATCH] m32r: Update syscall macros for MMU-less targets This patch is for updating m32r's MMU-less support. Some legacy MMU-less m32r chips cannot return from a trap handler to the right-hand side 16-bit halfword code of a 32-bit instrucion code pair, because a "trap" instruction specification was expanded in M32R-II ISA. This modification forces "trap" instructions to be placed in word alignment location with a parallel "nop" code. Signed-off-by: Kazuhiro Inaoka Signed-off-by: Hirokazu Takata Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/asm-m32r/unistd.h b/include/asm-m32r/unistd.h index ac399e1f7b..39be87ca2a 100644 --- a/include/asm-m32r/unistd.h +++ b/include/asm-m32r/unistd.h @@ -319,7 +319,7 @@ type name(void) \ register long __scno __asm__ ("r7") = __NR_##name; \ register long __res __asm__("r0"); \ __asm__ __volatile__ (\ - "trap #" SYSCALL_VECTOR \ + "trap #" SYSCALL_VECTOR "|| nop"\ : "=r" (__res) \ : "r" (__scno) \ : "memory"); \ @@ -332,7 +332,7 @@ type name(type1 arg1) \ register long __scno __asm__ ("r7") = __NR_##name; \ register long __res __asm__ ("r0") = (long)(arg1); \ __asm__ __volatile__ (\ - "trap #" SYSCALL_VECTOR \ + "trap #" SYSCALL_VECTOR "|| nop"\ : "=r" (__res) \ : "r" (__scno), "0" (__res) \ : "memory"); \ @@ -346,7 +346,7 @@ register long __scno __asm__ ("r7") = __NR_##name; \ register long __arg2 __asm__ ("r1") = (long)(arg2); \ register long __res __asm__ ("r0") = (long)(arg1); \ __asm__ __volatile__ (\ - "trap #" SYSCALL_VECTOR \ + "trap #" SYSCALL_VECTOR "|| nop"\ : "=r" (__res) \ : "r" (__scno), "0" (__res), "r" (__arg2) \ : "memory"); \ @@ -361,7 +361,7 @@ register long __arg3 __asm__ ("r2") = (long)(arg3); \ register long __arg2 __asm__ ("r1") = (long)(arg2); \ register long __res __asm__ ("r0") = (long)(arg1); \ __asm__ __volatile__ (\ - "trap #" SYSCALL_VECTOR \ + "trap #" SYSCALL_VECTOR "|| nop"\ : "=r" (__res) \ : "r" (__scno), "0" (__res), "r" (__arg2), \ "r" (__arg3) \ @@ -378,7 +378,7 @@ register long __arg3 __asm__ ("r2") = (long)(arg3); \ register long __arg2 __asm__ ("r1") = (long)(arg2); \ register long __res __asm__ ("r0") = (long)(arg1); \ __asm__ __volatile__ (\ - "trap #" SYSCALL_VECTOR \ + "trap #" SYSCALL_VECTOR "|| nop"\ : "=r" (__res) \ : "r" (__scno), "0" (__res), "r" (__arg2), \ "r" (__arg3), "r" (__arg4) \ @@ -397,7 +397,7 @@ register long __arg3 __asm__ ("r2") = (long)(arg3); \ register long __arg2 __asm__ ("r1") = (long)(arg2); \ register long __res __asm__ ("r0") = (long)(arg1); \ __asm__ __volatile__ (\ - "trap #" SYSCALL_VECTOR \ + "trap #" SYSCALL_VECTOR "|| nop"\ : "=r" (__res) \ : "r" (__scno), "0" (__res), "r" (__arg2), \ "r" (__arg3), "r" (__arg4), "r" (__arg5) \