[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 09/13] linux-user/sparc: Flush register windows befo
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 09/13] linux-user/sparc: Flush register windows before clone/fork/vfork |
Date: |
Sun, 19 May 2019 13:19:49 -0700 |
As seen as the very first instruction of sys_clone in the kernel.
Ideally this would be done in or before cpu_copy, and not with a
separate explicit test vs the syscall number, but this is a more
minimal solution.
Signed-off-by: Richard Henderson <address@hidden>
---
linux-user/sparc/cpu_loop.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c
index 9e357229c0..0816da6fa1 100644
--- a/linux-user/sparc/cpu_loop.c
+++ b/linux-user/sparc/cpu_loop.c
@@ -169,6 +169,18 @@ void cpu_loop (CPUSPARCState *env)
case 0x110:
case 0x16d:
#endif
+ /*
+ * Before copying/adjusting registers for parent/child,
+ * flush the register windows to the stack.
+ */
+ switch (env->gregs[1]) {
+ case TARGET_NR_fork:
+ case TARGET_NR_vfork:
+ case TARGET_NR_clone:
+ flush_windows(env);
+ break;
+ }
+
ret = do_syscall (env, env->gregs[1],
env->regwptr[0], env->regwptr[1],
env->regwptr[2], env->regwptr[3],
--
2.17.1
- [Qemu-devel] [PATCH 00/13] linux-user: path, clone, sparc, shmat fixes, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 01/13] util/path: Do not cache all filenames at startup, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 04/13] linux-user/alpha: Set r20 secondary return value, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 02/13] linux-user: Rename cpu_clone_regs to cpu_clone_regs_child, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 03/13] linux-user: Introduce cpu_clone_regs_parent, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 06/13] linux-user/sparc: Use WREG constants in sparc/target_cpu.h, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 05/13] target/sparc: Define an enumeration for accessing env->regwptr, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 08/13] linux-user/sparc: Fix cpu_clone_regs, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 11/13] tests/tcg/multiarch/linux-test: Fix error check for shmat, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 07/13] linux-user/sparc: Use WREG constants in sparc/signal.c, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 09/13] linux-user/sparc: Flush register windows before clone/fork/vfork,
Richard Henderson <=
- [Qemu-devel] [PATCH 10/13] scripts/qemu-binfmt-conf: Update for sparc64, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 12/13] linux-user: Fix shmat emulation by honoring host SHMLBA, Richard Henderson, 2019/05/19
- [Qemu-devel] [PATCH 13/13] linux-user: Align mmap_find_vma to host page size, Richard Henderson, 2019/05/19