diff mbox series

[v2,05/25] linux-user/sparc: Include TARGET_STACK_BIAS in get_sp_from_cpustate

Message ID 20210426025334.1168495-6-richard.henderson@linaro.org
State New
Headers show
Series linux-user/sparc: Implement rt signals | expand

Commit Message

Richard Henderson April 26, 2021, 2:53 a.m. UTC 
Move TARGET_STACK_BIAS from signal.c.  Generic code cares about the
logical stack pointer, not the physical one that has a bias applied
for sparc64.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 linux-user/sparc/target_cpu.h | 9 ++++++++-
 linux-user/sparc/signal.c     | 2 --
 2 files changed, 8 insertions(+), 3 deletions(-)

-- 
2.25.1
diff mbox series

Patch

diff --git a/linux-user/sparc/target_cpu.h b/linux-user/sparc/target_cpu.h
index 1fa1011775..1f4bed50f4 100644
--- a/linux-user/sparc/target_cpu.h
+++ b/linux-user/sparc/target_cpu.h
@@ -20,6 +20,12 @@ 
 #ifndef SPARC_TARGET_CPU_H
 #define SPARC_TARGET_CPU_H
 
+#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
+# define TARGET_STACK_BIAS 2047
+#else
+# define TARGET_STACK_BIAS 0
+#endif
+
 static inline void cpu_clone_regs_child(CPUSPARCState *env, target_ulong newsp,
                                         unsigned flags)
 {
@@ -40,6 +46,7 @@  static inline void cpu_clone_regs_child(CPUSPARCState *env, target_ulong newsp,
 #endif
         /* ??? The kernel appears to copy one stack frame to the new stack. */
         /* ??? The kernel force aligns the new stack. */
+        /* Userspace provides a biased stack pointer value. */
         env->regwptr[WREG_SP] = newsp;
     }
 
@@ -77,7 +84,7 @@  static inline void cpu_set_tls(CPUSPARCState *env, target_ulong newtls)
 
 static inline abi_ulong get_sp_from_cpustate(CPUSPARCState *state)
 {
-    return state->regwptr[WREG_SP];
+    return state->regwptr[WREG_SP] + TARGET_STACK_BIAS;
 }
 
 #endif
diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c
index d27b7a3af7..76579093a8 100644
--- a/linux-user/sparc/signal.c
+++ b/linux-user/sparc/signal.c
@@ -394,8 +394,6 @@  struct target_reg_window {
     abi_ulong ins[8];
 };
 
-#define TARGET_STACK_BIAS 2047
-
 /* {set, get}context() needed for 64-bit SparcLinux userland. */
 void sparc64_set_context(CPUSPARCState *env)
 {