[incubator-nuttx] branch master updated: arch: risc-v: Fix up_check_tcbstack() for CONFIG_ARCH_ADDRENV=y

[xiaoxiang]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new b7063427c8 arch: risc-v: Fix up_check_tcbstack() for 
CONFIG_ARCH_ADDRENV=y
b7063427c8 is described below

commit b7063427c8b79c1021c2dc47cf794e389565d0da
Author: Masayuki Ishikawa <masayuki.ishik...@gmail.com>
AuthorDate: Wed Aug 31 08:39:15 2022 +0900

    arch: risc-v: Fix up_check_tcbstack() for CONFIG_ARCH_ADDRENV=y
    
    Summary:
    - I noticed that ps shows incorrect stack usage when running
      getprime in the background.
    - With CONFIG_ARCH_ADDRENV=y, a user task including pthread
      allocates its stack in the user space that needs to be
      accessed with a correct address environment.
    - This commit fixes this issue.
    
    Impact:
    - CONFIG_ARCH_ADDRENV=y only
    
    Testing:
    - Tested with rv-virt:knsh64 on qemu-6.2
    
    Signed-off-by: Masayuki Ishikawa <masayuki.ishik...@jp.sony.com>
---
 arch/risc-v/src/common/riscv_checkstack.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/arch/risc-v/src/common/riscv_checkstack.c 
b/arch/risc-v/src/common/riscv_checkstack.c
index c3160c9a9a..71db7a5e06 100644
--- a/arch/risc-v/src/common/riscv_checkstack.c
+++ b/arch/risc-v/src/common/riscv_checkstack.c
@@ -155,8 +155,30 @@ size_t riscv_stack_check(uintptr_t alloc, size_t size)
 
 size_t up_check_tcbstack(struct tcb_s *tcb)
 {
-  return riscv_stack_check((uintptr_t)tcb->stack_base_ptr,
+  size_t size;
+
+#ifdef CONFIG_ARCH_ADDRENV
+  save_addrenv_t oldenv;
+  bool saved = false;
+
+  if ((tcb->flags & TCB_FLAG_TTYPE_MASK) != TCB_FLAG_TTYPE_KERNEL)
+    {
+      up_addrenv_select(&tcb->group->tg_addrenv, &oldenv);
+      saved = true;
+    }
+#endif
+
+  size = riscv_stack_check((uintptr_t)tcb->stack_base_ptr,
                            tcb->adj_stack_size);
+
+#ifdef CONFIG_ARCH_ADDRENV
+  if (saved)
+    {
+      up_addrenv_restore(&oldenv);
+    }
+#endif
+
+  return size;
 }
 
 ssize_t up_check_tcbstack_remain(struct tcb_s *tcb)