lkml.org 
[lkml]   [2015]   [Apr]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 14/24] arm64:ilp32 use the native LP64 'start_thread' for ILP32 threads
Date
From: Andrew Pinski <apinski@cavium.com>

If we have both ILP32 and AARCH32 compiled in, we need use the non compat start
thread for ILP32.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
---
arch/arm64/include/asm/processor.h | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index ea80e86..29ca21a 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -106,6 +106,15 @@ static inline void start_thread(struct pt_regs *regs, unsigned long pc,
static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc,
unsigned long sp)
{
+#ifdef CONFIG_ARM64_ILP32
+ /* ILP32 thread are started the same way as LP64 threads.
+ Note we cannot use is_ilp32_compat_task here as that
+ would introduce a header depency issue. */
+ if (test_thread_flag(TIF_32BIT_AARCH64)) {
+ start_thread(regs, pc, sp);
+ return;
+ }
+#endif
start_thread_common(regs, pc);
regs->pstate = COMPAT_PSR_MODE_USR;
if (pc & 1)
--
1.9.1


\
 
 \ /
  Last update: 2015-04-13 22:41    [W:0.249 / U:0.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site