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[11/16,RFC] linux-user: add target_sigdelset() and target_sigorset()

Message ID 1494586944-7253-12-git-send-email-Milos.Stojanovic@rt-rk.com
State New
Headers show

Commit Message

Milos Stojanovic May 12, 2017, 11:02 a.m. UTC 
Add two inline functions that work with the signal set of the target.

target_sigdelset() removes a signal from target_sigset_t.
target_sigorset() creates a union of two target_sigset_t.

These functions will be used for introducing support for tracking the
target signal set. Functions for emptying and adding into a target signal
set already exist so this commit will serve as a supplement.

Signed-off-by: Miloš Stojanović <Milos.Stojanovic@rt-rk.com>
---
 linux-user/signal.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
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Patch

diff --git a/linux-user/signal.c b/linux-user/signal.c
index 2bc6669..59d70ec 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -120,6 +120,12 @@  static inline void target_sigaddset(target_sigset_t *set, int signum)
     set->sig[signum / TARGET_NSIG_BPW] |= mask;
 }
 
+static inline void target_sigdelset(target_sigset_t *set, int signum)
+{
+    abi_ulong mask = (abi_ulong)1 << (--signum % TARGET_NSIG_BPW);
+    set->sig[signum / TARGET_NSIG_BPW] &= ~mask;
+}
+
 static inline int target_sigismember(const target_sigset_t *set, int signum)
 {
     signum--;
@@ -127,6 +133,16 @@  static inline int target_sigismember(const target_sigset_t *set, int signum)
     return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
 }
 
+static inline void target_sigorset(target_sigset_t *set,
+                                   const target_sigset_t *left,
+                                   const target_sigset_t *right)
+{
+    int i;
+    for (i = 0; i < TARGET_NSIG_WORDS; i++) {
+        set->sig[i] = left->sig[i] | right->sig[i];
+    }
+}
+
 static void host_to_target_sigset_internal(target_sigset_t *d,
                                            const sigset_t *s)
 {