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semihosting/arm-compat-semi: don't use SET_ARG to report SYS_HEAPINFO 

As per the spec:

  the PARAMETER REGISTER contains the address of a pointer to a
  four-field data block.

So we need to follow arg0 and place the results of SYS_HEAPINFO there.

Fixes: 3c37cfe0b1 ("semihosting: Change internal common-semi interfaces to use CPUState *")
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Cc: Bug 1915925 <1915925@bugs.launchpad.net>
Cc: Keith Packard <keithp@keithp.com>
Bug: https://bugs.launchpad.net/bugs/1915925
Message-Id: <20210323165308.15244-8-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2021-03-23 16:52:53 +00:00
parent 3960ca5b3e
commit 35e3f029a9
1 changed files with 5 additions and 1 deletions
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6
semihosting/arm-compat-semi.c
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@ -1214,7 +1214,11 @@ target_ulong do_common_semihosting(CPUState *cs)
for (i = 0; i < ARRAY_SIZE(retvals); i++) {
bool fail;
fail = SET_ARG(i, retvals[i]);
if (is_64bit_semihosting(env)) {
fail = put_user_u64(retvals[i], arg0 + i * 8);
} else {
fail = put_user_u32(retvals[i], arg0 + i * 4);
}
if (fail) {
/* Couldn't write back to argument block */