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authorVincent Ren-Wei Chen <vincentc@andestech.com>2017-01-17 07:31:24 +0100
committerWaldemar Brodkorb <wbx@openadk.org>2017-01-22 10:06:29 +0100
commit6af3332a4cbd1ffbc81f74759ef7c5e1a87d2e10 (patch)
tree4deae5f23fd1e2664f21c09dfb57fda799dffd10 /libc/sysdeps/linux/nds32/setcontext.S
parent82af21a60bc6e53dd92c1c140f20179d2ae4ad40 (diff)
nds32: add NPTL/TLS, *context function, libm changes and code cleanup
This commit includes following features. 1. Support NPTL/TLS 2. Add libm function which is used to handle FP rounding and excpetions (ex: fclrexcpt,fedisblxcpti,feenablxcpt... ) 3. Add *context function for operating user context (ex: setcontext,getcontext,makecontext... ) 4. Change the return flow from signal handler 5. Cleanup of old code The testsuite only has 2 errors, tst-cpuclock1 and tst-cputimer1, which are related to timing accuracy. (math and locale tests are disabled) Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>
Diffstat (limited to 'libc/sysdeps/linux/nds32/setcontext.S')
-rw-r--r--libc/sysdeps/linux/nds32/setcontext.S85
1 files changed, 85 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nds32/setcontext.S b/libc/sysdeps/linux/nds32/setcontext.S
new file mode 100644
index 000000000..f9265328f
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/setcontext.S
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sysdep.h>
+
+#include "ucontext_i.h"
+
+ENTRY(__setcontext)
+ move $r4, $r0
+
+#ifdef __NDS32_ABI_2FP_PLUS__
+ addi $r0, $r4, UCONTEXT_FDREGS
+
+ /* Case switch for $r20 as $fpcfg.freg. */
+ beqz $r20, .LCFG0 /* Branch if $fpcfg.freg = 0b00. */
+ xori $r15, $r20, #0b10
+ beqz $r15, .LCFG2 /* Branch if $fpcfg.freg = 0b10. */
+ srli $r20, $r20, #0b01
+ beqz $r20, .LCFG1 /* Branch if $fpcfg.freg = 0b01. */
+ /* Fall-through if $fpcfg.freg = 0b11. */
+.LCFG3:
+ fldi $fd31, [$r0 + 248]
+ fldi $fd30, [$r0 + 240]
+ fldi $fd29, [$r0 + 232]
+ fldi $fd28, [$r0 + 224]
+ fldi $fd27, [$r0 + 216]
+ fldi $fd26, [$r0 + 208]
+ fldi $fd25, [$r0 + 200]
+ fldi $fd24, [$r0 + 192]
+.LCFG2:
+ fldi $fd10, [$r0 + 80]
+ fldi $fd9, [$r0 + 72]
+ fldi $fd8, [$r0 + 64]
+.LCFG1:
+ fldi $fd7, [$r0 + 56]
+ fldi $fd6, [$r0 + 48]
+ fldi $fd5, [$r0 + 40]
+ fldi $fd4, [$r0 + 32]
+.LCFG0:
+ fldi $fd3, [$r0 + 24]
+ /*save fpcsr*/
+ lwi $r1, [$r0 + 0x100]
+ fmtcsr $r1
+#endif /* __NDS32_ABI_2FP_PLUS__ */
+
+ /* sigprocmask (SIG_BLOCK, &sc->sc_mask, NULL). */
+ move $r0, SIG_SETMASK
+ addi $r1, $r4, UCONTEXT_SIGMASK
+ move $r2, 0
+ move $r3, _NSIG8
+ syscall SYS_ify(rt_sigprocmask)
+ bnez $r0, 1f
+
+ move $r0, $r4
+ addi $r15, $r4, UCONTEXT_GREGS + 4
+ lmw.bim $r1, [$r15], $r14
+ addi $r15, $r15, 4
+ lmw.bim $r16, [$r15], $r25, #0xf
+ lwi $r15, [$r0 + UCONTEXT_PC]
+ push $r1
+ cfi_adjust_cfa_offset (4)
+ move $r1, $r0
+ lwi $r0, [$r1 + UCONTEXT_GREGS]
+ pop $r1
+ cfi_adjust_cfa_offset (-4)
+ jr $r15
+1:
+ move $r0, -1
+ ret
+END(__setcontext)
+
+weak_alias (__setcontext, setcontext)
+libc_hidden_def(__setcontext)
+
+ENTRY (__startcontext)
+ move $r0, $r6
+ beqz $r0, 1f
+ jal HIDDEN_JUMPTARGET(__setcontext)
+1:
+ move $r0, 0
+ j HIDDEN_JUMPTARGET(exit)
+END (__startcontext)
+