[PULL 35/35] semihosting: Fix GDB File-I/O FLEN

Alex Bennée posted 35 patches 2 weeks, 2 days ago
Maintainers: "Alex Bennée" <alex.bennee@linaro.org>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Thomas Huth <thuth@redhat.com>, Alexandre Iooss <erdnaxe@crans.org>, Mahmoud Mandour <ma.mandourr@gmail.com>, Pierrick Bouvier <pierrick.bouvier@linaro.org>, Richard Henderson <richard.henderson@linaro.org>, Peter Maydell <peter.maydell@linaro.org>, Michael Rolnik <mrolnik@gmail.com>, Helge Deller <deller@gmx.de>, Paolo Bonzini <pbonzini@redhat.com>, Eduardo Habkost <eduardo@habkost.net>, Song Gao <gaosong@loongson.cn>, Laurent Vivier <laurent@vivier.eu>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Aurelien Jarno <aurelien@aurel32.net>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <arikalo@gmail.com>, Stafford Horne <shorne@gmail.com>, Nicholas Piggin <npiggin@gmail.com>, Chinmay Rath <rathc@linux.ibm.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Weiwei Li <liwei1518@gmail.com>, Daniel Henrique Barboza <dbarboza@ventanamicro.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, Yoshinori Sato <yoshinori.sato@nifty.com>, David Hildenbrand <david@redhat.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Artyom Tarasenko <atar4qemu@gmail.com>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, Max Filippov <jcmvbkbc@gmail.com>
[PULL 35/35] semihosting: Fix GDB File-I/O FLEN
Posted by Alex Bennée 2 weeks, 2 days ago
From: Sean Anderson <sean.anderson@linux.dev>

fstat returns 0 on success and -1 on error. Since we have already
checked for error, ret must be zero. Therefore, any call to fstat on a
non-empty file will return -1/EOVERFLOW.

Restore the original logic that just did a byteswap. I don't really know
what the intention of the fixed commit was.

Fixes: a6300ed6b7 ("semihosting: Split out semihost_sys_flen")
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20251027110344.2289945-36-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index 61001267965..c5a07cb947b 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -316,10 +316,7 @@ common_semi_flen_fstat_cb(CPUState *cs, uint64_t ret, int err)
                                 &size, 8, 0)) {
             ret = -1, err = EFAULT;
         } else {
-            size = be64_to_cpu(size);
-            if (ret != size) {
-                ret = -1, err = EOVERFLOW;
-            }
+            ret = be64_to_cpu(size);
         }
     }
     common_semi_cb(cs, ret, err);
-- 
2.47.3