diff options
| author | Dimitar Dimitrov <dimitar@dinux.eu> | 2020-06-03 19:14:22 +0300 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2020-07-02 12:00:33 +0300 |
| commit | 70cd4cbe651388897539fe38d2610e9bb733c5a8 (patch) | |
| tree | 896d272daa155de64789654ab79f180755912bd3 /libgloss/pru | |
| parent | 5266248285bb3d2d012abd8a73957a0368f252ff (diff) | |
pru: Fix memory corruption on syscall return
In the initial code I missed one level of pointer indirection. Instead
of storing errno in impure_data, _impure_ptr was corrupted.
Only simulator is impacted. Real targets have no OS and no syscalls.
This resolves a bunch of stdio cases from the GCC testsuite:
FAIL->PASS: gcc.c-torture/execute/printf-2.c -O0 execution test
Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
Diffstat (limited to 'libgloss/pru')
| -rw-r--r-- | libgloss/pru/syscalls.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libgloss/pru/syscalls.S b/libgloss/pru/syscalls.S index 8ed7601a4..3ad0d9215 100644 --- a/libgloss/pru/syscalls.S +++ b/libgloss/pru/syscalls.S @@ -42,6 +42,7 @@ __SC_ret: /* Invert return code and store to errno (first int in _impure_ptr). */ rsb r14, r14, 0 ldi32 r1, _impure_ptr + lbbo r1, r1, 0, 4 sbbo r14, r1, 0, 4 /* Return -1 (for both int32_t or int64_t). */ fill r14, 8 |