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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-12-15 03:27:23 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-12-15 03:27:23 +0300 |
| commit | 4b4193256c8d3bc3a5397b5cd9494c2ad386317d (patch) | |
| tree | b6b070f8893384b5d563fc616018e7d5644b2ece /arch/arm64/include/asm/syscall.h | |
| parent | cffdd6d90482316e18d686060a4397902ea04bd2 (diff) | |
| parent | 92f0a3a22c7a4c936277ece3a0215955a2d52238 (diff) | |
| download | linux-4b4193256c8d3bc3a5397b5cd9494c2ad386317d.tar.xz | |
Merge branch 'next' into for-linus
Prepare input updates for 5.11 merge window.
Diffstat (limited to 'arch/arm64/include/asm/syscall.h')
| -rw-r--r-- | arch/arm64/include/asm/syscall.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index 65299a2dcf9c..cfc0672013f6 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -34,6 +34,10 @@ static inline long syscall_get_error(struct task_struct *task, struct pt_regs *regs) { unsigned long error = regs->regs[0]; + + if (is_compat_thread(task_thread_info(task))) + error = sign_extend64(error, 31); + return IS_ERR_VALUE(error) ? error : 0; } @@ -47,7 +51,13 @@ static inline void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, int error, long val) { - regs->regs[0] = (long) error ? error : val; + if (error) + val = error; + + if (is_compat_thread(task_thread_info(task))) + val = lower_32_bits(val); + + regs->regs[0] = val; } #define SYSCALL_MAX_ARGS 6 |