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ARM: fix ldrexd/strexd

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Correct ldrexd and strexd code to always read and write the
high word of the 64-bit value from addr+4.
Also make ldrexd and strexd agree that for a 64 bit value the
address in env->exclusive_addr is that of the low word.

This fixes the issues reported in
https://bugs.launchpad.net/qemu/+bug/670883

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
This commit is contained in:
Peter Maydell 2010-12-07 15:37:34 +00:00
parent 49e14940ad
commit 2c9adbda72
2 changed files with 6 additions and 4 deletions
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2
linux-user/main.c
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@ -589,7 +589,7 @@ static int do_strex(CPUARMState *env)
}
if (size == 3) {
val = env->regs[(env->exclusive_info >> 12) & 0xf];
segv = put_user_u32(val, addr);
segv = put_user_u32(val, addr + 4);
if (segv) {
env->cp15.c6_data = addr + 4;
goto done;