[uclibc-ng-devel] uClibc-ng - small C library for embedded systems branch master updated. 42f4f533c7a4505dd8ee53b42f7fb3db1877f520

wbx wbx at helium.waldemar-brodkorb.de
Wed Jun 24 22:38:50 CEST 2015


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- Log -----------------------------------------------------------------
commit 42f4f533c7a4505dd8ee53b42f7fb3db1877f520
Author: Waldemar Brodkorb <wbx at openadk.org>
Date:   Wed Jun 24 15:54:28 2015 -0500

    mips64: patches from OpenWrt
    
    Add these changes to get mips64 with n32 ABI working.

-----------------------------------------------------------------------

Summary of changes:
 extra/Configs/Config.in                            |    1 +
 libc/sysdeps/linux/mips/sysdep.h                   |   20 ++-
 .../unix/sysv/linux/mips/mips64/sysdep-cancel.h    |  182 ++++++++++++++++++++
 3 files changed, 202 insertions(+), 1 deletion(-)
 create mode 100644 libpthread/nptl/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h

diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
index 2f64b79..4fbd398 100644
--- a/extra/Configs/Config.in
+++ b/extra/Configs/Config.in
@@ -226,6 +226,7 @@ config TARGET_SUBARCH
 	default "i586" if CONFIG_586
 	default "i686" if CONFIG_686
 	default "arcv2" if CONFIG_ARC_CPU_HS
+	default "mips64" if CONFIG_MIPS_N64_ABI
 	default ""
 
 source "extra/Configs/Config.in.arch"
diff --git a/libc/sysdeps/linux/mips/sysdep.h b/libc/sysdeps/linux/mips/sysdep.h
index 86873ac..0ed0500 100644
--- a/libc/sysdeps/linux/mips/sysdep.h
+++ b/libc/sysdeps/linux/mips/sysdep.h
@@ -93,7 +93,8 @@
    backwards into the previous fn.  */
 
 #ifdef __PIC__
-#define PSEUDO(name, syscall_name, args) 		\
+# if _MIPS_SIM == _ABIO32
+#  define PSEUDO(name, syscall_name, args) 		\
   .align 2;						\
   99: move a0, v0;					\
   la t9,__syscall_error;				\
@@ -106,6 +107,23 @@
   .set reorder;						\
   bne a3, zero, 99b;					\
 L(syse1):
+# else
+#  define PSEUDO(name, syscall_name, args) 		\
+  .align 2;						\
+  99:							\
+  .set noat;						\
+  .cpsetup t9, $1, name;				\
+  .set at;						\
+  move a0, v0;						\
+  dla t9,__syscall_error;				\
+  .cpreturn;						\
+  jr t9;						\
+  ENTRY(name)						\
+  li v0, SYS_ify(syscall_name);				\
+  syscall;						\
+  bne a3, zero, 99b;					\
+L(syse1):
+# endif
 #else
 #define PSEUDO(name, syscall_name, args) 		\
   .set noreorder;					\
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h
new file mode 100644
index 0000000..74f3db9
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h
@@ -0,0 +1,182 @@
+/* Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <tls.h>
+#ifndef __ASSEMBLER__
+# include <pthreadP.h>
+#endif
+#include <sys/asm.h>
+
+/* Gas will put the initial save of $gp into the CIE, because it appears to
+   happen before any instructions.  So we use cfi_same_value instead of
+   cfi_restore.  */
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
+
+#ifdef __PIC__
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args)				      \
+      .align 2;								      \
+  L(pseudo_start):							      \
+      cfi_startproc;							      \
+      cfi_adjust_cfa_offset (STKSPACE);					      \
+      cfi_rel_offset (gp, STKOFF_GP);					      \
+  99: move a0, v0;							      \
+      PTR_LA t9,__syscall_error;					      \
+      /* manual cpreturn */						      \
+      REG_L gp, STKOFF_GP(sp);						      \
+      cfi_same_value (gp);						      \
+      RESTORESTK;							      \
+      jr t9;								      \
+  .type __##syscall_name##_nocancel, @function;				      \
+  .globl __##syscall_name##_nocancel;					      \
+  __##syscall_name##_nocancel:						      \
+    SAVESTK;								      \
+    .cpsetup t9, STKOFF_GP, name;					      \
+    cfi_rel_offset (gp, STKOFF_GP);					      \
+    li v0, SYS_ify(syscall_name);					      \
+    syscall;								      \
+    bne a3, zero, SYSCALL_ERROR_LABEL;			       		      \
+    /* manual cpreturn */						      \
+    REG_L gp, STKOFF_GP(sp);						      \
+    cfi_same_value (gp);						      \
+    RESTORESTK;								      \
+    ret;								      \
+  .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;	      \
+  ENTRY (name)								      \
+    SAVESTK;								      \
+    .cpsetup t9, STKOFF_GP, name;					      \
+    cfi_rel_offset (gp, STKOFF_GP);					      \
+    SINGLE_THREAD_P(v1);						      \
+    bne zero, v1, L(pseudo_cancel);					      \
+    .set noreorder;							      \
+    li v0, SYS_ify(syscall_name);					      \
+    syscall;								      \
+    .set reorder;							      \
+    bne a3, zero, SYSCALL_ERROR_LABEL;			       		      \
+    /* manual cpreturn */						      \
+    REG_L gp, STKOFF_GP(sp);						      \
+    cfi_same_value (gp);						      \
+    RESTORESTK;								      \
+    ret;								      \
+  L(pseudo_cancel):							      \
+    cfi_adjust_cfa_offset (STKSPACE);					      \
+    cfi_rel_offset (gp, STKOFF_GP);					      \
+    REG_S ra, STKOFF_RA(sp);						      \
+    cfi_rel_offset (ra, STKOFF_RA);					      \
+    PUSHARGS_##args;			/* save syscall args */	      	      \
+    CENABLE;								      \
+    REG_S v0, STKOFF_SVMSK(sp);		/* save mask */			      \
+    POPARGS_##args;			/* restore syscall args */	      \
+    .set noreorder;							      \
+    li v0, SYS_ify (syscall_name);				      	      \
+    syscall;								      \
+    .set reorder;							      \
+    REG_S v0, STKOFF_SC_V0(sp);		/* save syscall result */             \
+    REG_S a3, STKOFF_SC_ERR(sp);	/* save syscall error flag */	      \
+    REG_L a0, STKOFF_SVMSK(sp);		/* pass mask as arg1 */		      \
+    CDISABLE;								      \
+    REG_L a3, STKOFF_SC_ERR(sp);	/* restore syscall error flag */      \
+    REG_L ra, STKOFF_RA(sp);		/* restore return address */	      \
+    REG_L v0, STKOFF_SC_V0(sp);		/* restore syscall result */          \
+    bne a3, zero, SYSCALL_ERROR_LABEL;					      \
+    /* manual cpreturn */						      \
+    REG_L gp, STKOFF_GP(sp);						      \
+    cfi_same_value (gp);						      \
+    RESTORESTK;								      \
+  L(pseudo_end):
+
+
+# undef PSEUDO_END
+# define PSEUDO_END(sym) cfi_endproc; .end sym; .size sym,.-sym
+
+#endif
+
+# define PUSHARGS_0	/* nothing to do */
+# define PUSHARGS_1	PUSHARGS_0 REG_S a0, STKOFF_A0(sp); cfi_rel_offset (a0, STKOFF_A0);
+# define PUSHARGS_2	PUSHARGS_1 REG_S a1, STKOFF_A1(sp); cfi_rel_offset (a1, STKOFF_A1);
+# define PUSHARGS_3	PUSHARGS_2 REG_S a2, STKOFF_A2(sp); cfi_rel_offset (a2, STKOFF_A2);
+# define PUSHARGS_4	PUSHARGS_3 REG_S a3, STKOFF_A3(sp); cfi_rel_offset (a3, STKOFF_A3);
+# define PUSHARGS_5	PUSHARGS_4 REG_S a4, STKOFF_A4(sp); cfi_rel_offset (a3, STKOFF_A4);
+# define PUSHARGS_6	PUSHARGS_5 REG_S a5, STKOFF_A5(sp); cfi_rel_offset (a3, STKOFF_A5);
+
+# define POPARGS_0	/* nothing to do */
+# define POPARGS_1	POPARGS_0 REG_L a0, STKOFF_A0(sp);
+# define POPARGS_2	POPARGS_1 REG_L a1, STKOFF_A1(sp);
+# define POPARGS_3	POPARGS_2 REG_L a2, STKOFF_A2(sp);
+# define POPARGS_4	POPARGS_3 REG_L a3, STKOFF_A3(sp);
+# define POPARGS_5	POPARGS_4 REG_L a4, STKOFF_A4(sp);
+# define POPARGS_6	POPARGS_5 REG_L a5, STKOFF_A5(sp);
+
+/* Save an even number of slots.  Should be 0 if an even number of slots
+   are used below, or SZREG if an odd number are used.  */
+# define STK_PAD	SZREG
+
+/* Place values that we are more likely to use later in this sequence, i.e.
+   closer to the SP at function entry.  If you do that, the are more
+   likely to already be in your d-cache.  */
+# define STKOFF_A5	(STK_PAD)
+# define STKOFF_A4	(STKOFF_A5 + SZREG)
+# define STKOFF_A3	(STKOFF_A4 + SZREG)
+# define STKOFF_A2	(STKOFF_A3 + SZREG)	/* MT and more args.  */
+# define STKOFF_A1	(STKOFF_A2 + SZREG)	/* MT and 2 args.  */
+# define STKOFF_A0	(STKOFF_A1 + SZREG)	/* MT and 1 arg.  */
+# define STKOFF_RA	(STKOFF_A0 + SZREG)	/* Used if MT.  */
+# define STKOFF_SC_V0	(STKOFF_RA + SZREG)	/* Used if MT.  */
+# define STKOFF_SC_ERR	(STKOFF_SC_V0 + SZREG)	/* Used if MT.  */
+# define STKOFF_SVMSK	(STKOFF_SC_ERR + SZREG)	/* Used if MT.  */
+# define STKOFF_GP	(STKOFF_SVMSK + SZREG)	/* Always used.  */
+
+# define STKSPACE	(STKOFF_GP + SZREG)
+# define SAVESTK 	PTR_SUBU sp, STKSPACE; cfi_adjust_cfa_offset(STKSPACE)
+# define RESTORESTK 	PTR_ADDU sp, STKSPACE; cfi_adjust_cfa_offset(-STKSPACE)
+
+# ifdef IS_IN_libpthread
+#  define CENABLE	PTR_LA t9, __pthread_enable_asynccancel; jalr t9
+#  define CDISABLE	PTR_LA t9, __pthread_disable_asynccancel; jalr t9
+# elif defined IS_IN_librt
+#  define CENABLE	PTR_LA t9, __librt_enable_asynccancel; jalr t9
+#  define CDISABLE	PTR_LA t9, __librt_disable_asynccancel; jalr t9
+# else
+#  define CENABLE	PTR_LA t9, __libc_enable_asynccancel; jalr t9
+#  define CDISABLE	PTR_LA t9, __libc_disable_asynccancel; jalr t9
+# endif
+
+# ifndef __ASSEMBLER__
+#  define SINGLE_THREAD_P						\
+	__builtin_expect (THREAD_GETMEM (THREAD_SELF,			\
+					 header.multiple_threads)	\
+			  == 0, 1)
+# else
+#  define SINGLE_THREAD_P(reg)						\
+	READ_THREAD_POINTER(reg);					\
+	lw reg, MULTIPLE_THREADS_OFFSET(reg)
+#endif
+
+#elif !defined __ASSEMBLER__
+
+# define SINGLE_THREAD_P 1
+# define NO_CANCELLATION 1
+
+#endif
+
+#ifndef __ASSEMBLER__
+# define RTLD_SINGLE_THREAD_P \
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+				   header.multiple_threads) == 0, 1)
+#endif


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