Hi all, According to the SPARCv8 and SPARCv9 manuals, the jmpl, rett and return instructions should generate a mem_address_not_aligned trap if either of the low-order two bits of the target address is nonzero.
The patch below implements that. Bye, Aurelien Index: target-sparc/cpu.h =================================================================== RCS file: /sources/qemu/qemu/target-sparc/cpu.h,v retrieving revision 1.32 diff -u -d -p -r1.32 cpu.h --- target-sparc/cpu.h 1 Apr 2007 15:15:36 -0000 1.32 +++ target-sparc/cpu.h 1 Apr 2007 16:51:22 -0000 @@ -35,6 +35,7 @@ #define TT_NFPU_INSN 0x04 #define TT_WIN_OVF 0x05 #define TT_WIN_UNF 0x06 +#define TT_UNALIGNED 0x07 #define TT_FP_EXCP 0x08 #define TT_DFAULT 0x09 #define TT_TOVF 0x0a @@ -55,6 +56,7 @@ #define TT_DFAULT 0x30 #define TT_DMISS 0x31 #define TT_DPROT 0x32 +#define TT_UNALIGNED 0x34 #define TT_PRIV_ACT 0x37 #define TT_EXTINT 0x40 #define TT_SPILL 0x80 Index: target-sparc/op.c =================================================================== RCS file: /sources/qemu/qemu/target-sparc/op.c,v retrieving revision 1.27 diff -u -d -p -r1.27 op.c --- target-sparc/op.c 1 Apr 2007 15:38:17 -0000 1.27 +++ target-sparc/op.c 1 Apr 2007 17:01:15 -0000 @@ -1486,7 +1486,10 @@ void OPPROTO op_movl_npc_im(void) void OPPROTO op_movl_npc_T0(void) { - env->npc = T0; + if (T0 & 0x3) + raise_exception(TT_UNALIGNED); + else + env->npc = T0; } void OPPROTO op_mov_pc_npc(void) -- .''`. Aurelien Jarno | GPG: 1024D/F1BCDB73 : :' : Debian developer | Electrical Engineer `. `' [EMAIL PROTECTED] | [EMAIL PROTECTED] `- people.debian.org/~aurel32 | www.aurel32.net