On 5/8/26 10:12, James Hilliard wrote:
Implement the MIPS_ATOMIC_SET sysmips command as an aligned 32-bit atomic
exchange in target memory.
MIPS reports syscall errors through a separate register, so successful old
values can overlap the errno range. Write the return value and error flag
directly and return -QEMU_ESIGRETURN so the common syscall path leaves the
registers unchanged.
Signed-off-by: James Hilliard<[email protected]>
---
Changes v2 -> v3:
- Split MIPS_ATOMIC_SET out of the combined sysmips/MIPS_FIXADE patch.
(suggested by Richard Henderson)
- Always use the explicit MIPS return-register path for successful
atomic_set results. (suggested by Richard Henderson)
---
linux-user/mips/target_syscall.h | 1 +
linux-user/mips64/target_syscall.h | 1 +
linux-user/syscall.c | 31 +++++++++++++++++++++++++++++++
3 files changed, 33 insertions(+)
Reviewed-by: Richard Henderson <[email protected]>
r~
