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[PATCH v2 3/4] semihosting/arm-compat-semi: deref parameter register for
From: |
Alex Bennée |
Subject: |
[PATCH v2 3/4] semihosting/arm-compat-semi: deref parameter register for SYS_HEAPINFO |
Date: |
Tue, 9 Mar 2021 14:17:26 +0000 |
As per the spec:
the PARAMETER REGISTER contains the address of a pointer to a
four-field data block.
So we need to follow the pointer and place the results of SYS_HEAPINFO
there.
Bug: https://bugs.launchpad.net/bugs/1915925
Cc: Bug 1915925 <1915925@bugs.launchpad.net>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
semihosting/arm-compat-semi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index 733eea1e2d..2ac9226d29 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -1210,6 +1210,8 @@ target_ulong do_common_semihosting(CPUState *cs)
retvals[2] = rambase + limit; /* Stack base */
retvals[3] = rambase; /* Stack limit. */
#endif
+ /* The result array is pointed to by arg0 */
+ args = arg0;
for (i = 0; i < ARRAY_SIZE(retvals); i++) {
bool fail;
--
2.20.1