diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-10-09 21:53:08 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-10-28 14:54:22 +0100 |
| commit | b202d41ee705a7a6152d03eb362e2e2147505022 (patch) | |
| tree | d6dc44393182045f45fe5ee5da67cbee221b1fe9 /tcg/README | |
| parent | 344028ba0f63b31c30723d2c1064d3539aa0f070 (diff) | |
tcg: forbid ld/st function to modify globals
Mapping a memory address using a global and accessing it through
ld/st operations is currently broken. As it doesn't make any sense
to do that performance wise, let's forbid that.
Update the TCG documentation, and remove partial support for that.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg/README')
| -rw-r--r-- | tcg/README | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tcg/README b/tcg/README index aa86992bca..9d1b100613 100644 --- a/tcg/README +++ b/tcg/README @@ -349,6 +349,9 @@ st32_i64 t0, t1, offset write(t0, t1 + offset) Write 8, 16, 32 or 64 bits to host memory. +All this opcodes assume that the pointed host memory doesn't correspond +to a global. In the latter case the behaviour is unpredictable. + ********* 64-bit target on 32-bit host support The following opcodes are internal to TCG. Thus they are to be implemented by |