diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2011-09-06 03:55:47 +0400 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2011-09-10 16:57:39 +0000 |
| commit | 1ddeaa5d4277af76679d02bc59b08657c357aee6 (patch) | |
| tree | c0641b7c4feaf2633c5bd99cd61138f11d54f19d /target-xtensa | |
| parent | 5b4e481b041150fbc6eaef6205095077893a3781 (diff) | |
target-xtensa: implement SIMCALL
Tensilica iss provides support for applications running in freestanding
environment through SIMCALL command. It is used by Tensilica libc to
access argc/argv, for file I/O, etc.
Note that simcalls that accept buffer addresses expect virtual addresses.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'target-xtensa')
| -rw-r--r-- | target-xtensa/helpers.h | 1 | ||||
| -rw-r--r-- | target-xtensa/translate.c | 9 |
2 files changed, 9 insertions, 1 deletions
diff --git a/target-xtensa/helpers.h b/target-xtensa/helpers.h index b318c5a82c..6e02d26dfd 100644 --- a/target-xtensa/helpers.h +++ b/target-xtensa/helpers.h @@ -14,6 +14,7 @@ DEF_HELPER_0(restore_owb, void) DEF_HELPER_1(movsp, void, i32) DEF_HELPER_1(wsr_lbeg, void, i32) DEF_HELPER_1(wsr_lend, void, i32) +DEF_HELPER_1(simcall, void, env) DEF_HELPER_0(dump_state, void) #include "def-helper.h" diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c index dd84dfcac5..1598e27440 100644 --- a/target-xtensa/translate.c +++ b/target-xtensa/translate.c @@ -35,6 +35,7 @@ #include "disas.h" #include "tcg-op.h" #include "qemu-log.h" +#include "sysemu.h" #include "helpers.h" #define GEN_HELPER 1 @@ -726,7 +727,13 @@ static void disas_xtensa_insn(DisasContext *dc) break; case 1: /*SIMCALL*/ - TBD(); + if (semihosting_enabled) { + gen_check_privilege(dc); + gen_helper_simcall(cpu_env); + } else { + qemu_log("SIMCALL but semihosting is disabled\n"); + gen_exception_cause(dc, ILLEGAL_INSTRUCTION_CAUSE); + } break; default: |