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| author | Kwok Cheung Yeung <kcy@codesourcery.com> | 2013-07-19 09:21:44 -0700 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2013-07-23 17:31:25 +0300 |
| commit | a033381758841837edaf307e20edf019c5900609 (patch) | |
| tree | 43e73fe2a5cbd5cc351ab5ab53ab0ec1fa780bbc | |
| parent | d02532f08e207419e412ea7cd4eb8b36f04f426d (diff) | |
| download | qemu-a033381758841837edaf307e20edf019c5900609.zip qemu-a033381758841837edaf307e20edf019c5900609.tar.gz qemu-a033381758841837edaf307e20edf019c5900609.tar.bz2 | |
linux-user: Handle compressed ISA encodings when processing MIPS exceptions
Decode trap instructions during the handling of an EXCP_BREAK or EXCP_TRAP
according to the current ISA mode.
Signed-off-by: Kwok Cheung Yeung <kcy@codesourcery.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
| -rw-r--r-- | linux-user/main.c | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index 547884c..441e31d 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -2310,7 +2310,31 @@ done_syscall: abi_ulong trap_instr; unsigned int code; - ret = get_user_ual(trap_instr, env->active_tc.PC); + if (env->hflags & MIPS_HFLAG_M16) { + if (env->insn_flags & ASE_MICROMIPS) { + /* microMIPS mode */ + abi_ulong instr[2]; + + ret = get_user_u16(instr[0], env->active_tc.PC) || + get_user_u16(instr[1], env->active_tc.PC + 2); + + trap_instr = (instr[0] << 16) | instr[1]; + } else { + /* MIPS16e mode */ + ret = get_user_u16(trap_instr, env->active_tc.PC); + if (ret != 0) { + goto error; + } + code = (trap_instr >> 6) & 0x3f; + if (do_break(env, &info, code) != 0) { + goto error; + } + break; + } + } else { + ret = get_user_ual(trap_instr, env->active_tc.PC); + } + if (ret != 0) { goto error; } @@ -2334,14 +2358,30 @@ done_syscall: abi_ulong trap_instr; unsigned int code = 0; - ret = get_user_ual(trap_instr, env->active_tc.PC); + if (env->hflags & MIPS_HFLAG_M16) { + /* microMIPS mode */ + abi_ulong instr[2]; + + ret = get_user_u16(instr[0], env->active_tc.PC) || + get_user_u16(instr[1], env->active_tc.PC + 2); + + trap_instr = (instr[0] << 16) | instr[1]; + } else { + ret = get_user_ual(trap_instr, env->active_tc.PC); + } + if (ret != 0) { goto error; } /* The immediate versions don't provide a code. */ if (!(trap_instr & 0xFC000000)) { - code = ((trap_instr >> 6) & ((1 << 10) - 1)); + if (env->hflags & MIPS_HFLAG_M16) { + /* microMIPS mode */ + code = ((trap_instr >> 12) & ((1 << 4) - 1)); + } else { + code = ((trap_instr >> 6) & ((1 << 10) - 1)); + } } if (do_break(env, &info, code) != 0) { |