[uClibc]mips and clone.S
Scott A McConnell
samcconn at cotw.com
Tue May 21 16:40:50 UTC 2002
Since no one appears to be working on this issue...
I have been working on getting clone.S built for mipsel.
I pulled over asm.h, sysdep.S and /sysdeps/unix/mips/sysdep.h (modified
this a little)
from glibc.
With the patch I have attached below I have made it to this point:
mipsel-linux-strip -x -R .note -R .comment setjmp.o
mipsel-linux-gcc -Wall -Os -falign-functions=1 -fno-builtin -nostdinc
-nostdinc -I../../../../include
-I/opt/toolchains/mips/lib/gcc-lib/mipsel-linux/3.1/include -I. -D_LIBC
-DNDEBUG -fPIC -D_LIBC_REENTRANT -c clone.S -o clone.o
clone.S: Assembler messages:
clone.S:107: Error: unrecognized opcode `extern __typeof(__clone)clone
__attribute__((weak,alias("__clone")))'
-------------------------------
I tracked the above into features.h and compared the definition to what
is in glibc. It looks right.
Can anyone explain to me what it is complaining about?
--
Scott A. McConnell
------------------------------------------------------
diff -urN uClibc/libc/sysdeps/linux/mips/CVS/Entries
uClibc-new/libc/sysdeps/linux/mips/CVS/Entries
--- uClibc/libc/sysdeps/linux/mips/CVS/Entries Tue May 21 11:06:36 2002
+++ uClibc-new/libc/sysdeps/linux/mips/CVS/Entries Tue May 21 09:07:42
2002
@@ -13,5 +13,5 @@
/vfork.c/1.1/Sat Feb 16 20:16:20 2002//
D/bits////
D/sys////
-/Makefile/1.13/Tue May 21 16:06:36 2002//
-/clone.S/1.1/Tue May 21 16:06:36 2002//
+/clone.S/1.1/Tue May 21 12:59:03 2002//
+/Makefile/1.13/Tue May 21 13:40:17 2002//
diff -urN uClibc/libc/sysdeps/linux/mips/Makefile
uClibc-new/libc/sysdeps/linux/mips/Makefile
--- uClibc/libc/sysdeps/linux/mips/Makefile Tue May 21 11:06:36 2002
+++ uClibc-new/libc/sysdeps/linux/mips/Makefile Tue May 21 10:57:25 2002
@@ -30,7 +30,7 @@
CRT0=crt0.S
CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0))
-SSRC=bsd-_setjmp.S bsd-setjmp.S setjmp.S #fork.S clone.S
+SSRC=bsd-_setjmp.S bsd-setjmp.S setjmp.S clone.S sysdep.S #fork.S
SOBJS=$(patsubst %.S,%.o, $(SSRC))
CSRC=__longjmp.c brk.c vfork.c setjmp_aux.c _mmap.c pipe.c
diff -urN uClibc/libc/sysdeps/linux/mips/sys/asm.h
uClibc-new/libc/sysdeps/linux/mips/sys/asm.h
--- uClibc/libc/sysdeps/linux/mips/sys/asm.h Wed Dec 31 18:00:00 1969
+++ uClibc-new/libc/sysdeps/linux/mips/sys/asm.h Fri May 17 14:57:02
2002
@@ -0,0 +1,377 @@
+/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ralf Baechle <ralf at gnu.org>.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SYS_ASM_H
+#define _SYS_ASM_H
+
+#include <sgidefs.h>
+
+#ifndef CAT
+#ifdef __STDC__
+#define __CAT(str1,str2) str1##str2
+#else
+#define __CAT(str1,str2) str1/**/str2
+#endif
+#define CAT(str1,str2) __CAT(str1,str2)
+#endif
+
+/*
+ * Macros to handle different pointer/register sizes for 32/64-bit code
+ *
+ * 64 bit address space isn't used yet, so we may use the R3000 32 bit
+ * defines for now.
+ */
+#define PTR .word
+#define PTRSIZE 4
+#define PTRLOG 2
+
+/*
+ * PIC specific declarations
+ */
+#ifdef __PIC__
+#define CPRESTORE(register) \
+ .cprestore register
+#define CPADD(register) \
+ .cpadd register
+#define CPLOAD(register) \
+ .cpload register
+#else
+#define CPRESTORE(register)
+#define CPADD(register)
+#define CPLOAD(register)
+#endif
+
+/*
+ * LEAF - declare leaf routine
+ */
+#define LEAF(symbol) \
+ .globl symbol; \
+ .align 2; \
+ .type symbol, at function; \
+ .ent symbol,0; \
+symbol: .frame sp,0,ra
+
+/*
+ * NESTED - declare nested routine entry point
+ */
+#define NESTED(symbol, framesize, rpc) \
+ .globl symbol; \
+ .align 2; \
+ .type symbol, at function; \
+ .ent symbol,0; \
+symbol: .frame sp, framesize, rpc
+
+/*
+ * END - mark end of function
+ */
+#define END(function) \
+ .end function; \
+ .size function,.-function
+
+/*
+ * EXPORT - export definition of symbol
+ */
+#define EXPORT(symbol) \
+ .globl symbol; \
+symbol:
+
+/*
+ * ABS - export absolute symbol
+ */
+#define ABS(symbol,value) \
+ .globl symbol; \
+symbol = value
+
+#define PANIC(msg) \
+ .set push; \
+ .set reorder; \
+ la a0,8f; \
+ jal panic; \
+9: b 9b; \
+ .set pop; \
+ TEXT(msg)
+
+/*
+ * Print formated string
+ */
+#define PRINT(string) \
+ .set push; \
+ .set reorder; \
+ la a0,8f; \
+ jal printk; \
+ .set pop; \
+ TEXT(string)
+
+#define TEXT(msg) \
+ .data; \
+8: .asciiz msg; \
+ .previous;
+
+/*
+ * Build text tables
+ */
+#define TTABLE(string) \
+ .text; \
+ .word 1f; \
+ .previous; \
+ .data; \
+1: .asciz string; \
+ .previous
+
+/*
+ * MIPS IV pref instruction.
+ * Use with .set noreorder only!
+ *
+ * MIPS IV implementations are free to treat this as a nop. The R5000
+ * is one of them. So we should have an option not to use this
instruction.
+ */
+#if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5)
+#define PREF(hint,addr) \
+ pref hint,addr
+#define PREFX(hint,addr) \
+ prefx hint,addr
+#else
+#define PREF
+#define PREFX
+#endif
+
+/*
+ * MIPS ISA IV/V movn/movz instructions and equivalents for older CPUs.
+ */
+#if _MIPS_ISA == _MIPS_ISA_MIPS1
+#define MOVN(rd,rs,rt) \
+ .set push; \
+ .set reorder; \
+ beqz rt,9f; \
+ move rd,rs; \
+ .set pop; \
+9:
+#define MOVZ(rd,rs,rt) \
+ .set push; \
+ .set reorder; \
+ bnez rt,9f; \
+ move rd,rt; \
+ .set pop; \
+9:
+#endif /* _MIPS_ISA == _MIPS_ISA_MIPS1 */
+#if (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3)
+#define MOVN(rd,rs,rt) \
+ .set push; \
+ .set noreorder; \
+ bnezl rt,9f; \
+ move rd,rs; \
+ .set pop; \
+9:
+#define MOVZ(rd,rs,rt) \
+ .set push; \
+ .set noreorder; \
+ beqzl rt,9f; \
+ movz rd,rs; \
+ .set pop; \
+9:
+#endif /* (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA ==
_MIPS_ISA_MIPS3) */
+#if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5)
+#define MOVN(rd,rs,rt) \
+ movn rd,rs,rt
+#define MOVZ(rd,rs,rt) \
+ movz rd,rs,rt
+#endif /* (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA ==
_MIPS_ISA_MIPS5) */
+
+/*
+ * Stack alignment
+ */
+#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2)
+#define ALSZ 7
+#define ALMASK ~7
+#endif
+#if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) ||
\
+ (_MIPS_ISA == _MIPS_ISA_MIPS5)
+#define ALSZ 15
+#define ALMASK ~15
+#endif
+
+/*
+ * Size of a register
+ */
+#ifdef __mips64
+#define SZREG 8
+#else
+#define SZREG 4
+#endif
+
+/*
+ * Use the following macros in assemblercode to load/store registers,
+ * pointers etc.
+ */
+#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2)
+#define REG_S sw
+#define REG_L lw
+#define PTR_SUBU subu
+#define PTR_ADDU addu
+#endif
+#if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) ||
\
+ (_MIPS_ISA == _MIPS_ISA_MIPS5)
+#define REG_S sd
+#define REG_L ld
+/* We still live in a 32 bit address space ... */
+#define PTR_SUBU subu
+#define PTR_ADDU addu
+#endif
+
+/*
+ * How to add/sub/load/store/shift C int variables.
+ */
+#if (_MIPS_SZINT == 32)
+#define INT_ADD add
+#define INT_ADDI addi
+#define INT_ADDU addu
+#define INT_ADDIU addiu
+#define INT_SUB add
+#define INT_SUBI subi
+#define INT_SUBU subu
+#define INT_SUBIU subu
+#define INT_L lw
+#define INT_S sw
+#define LONG_SLL sll
+#define LONG_SLLV sllv
+#define LONG_SRL srl
+#define LONG_SRLV srlv
+#define LONG_SRA sra
+#define LONG_SRAV srav
+#endif
+
+#if (_MIPS_SZINT == 64)
+#define INT_ADD dadd
+#define INT_ADDI daddi
+#define INT_ADDU daddu
+#define INT_ADDIU daddiu
+#define INT_SUB dadd
+#define INT_SUBI dsubi
+#define INT_SUBU dsubu
+#define INT_SUBIU dsubu
+#define INT_L ld
+#define INT_S sd
+#define LONG_SLL dsll
+#define LONG_SLLV dsllv
+#define LONG_SRL dsrl
+#define LONG_SRLV dsrlv
+#define LONG_SRA dsra
+#define LONG_SRAV dsrav
+#endif
+
+/*
+ * How to add/sub/load/store/shift C long variables.
+ */
+#if (_MIPS_SZLONG == 32)
+#define LONG_ADD add
+#define LONG_ADDI addi
+#define LONG_ADDU addu
+#define LONG_ADDIU addiu
+#define LONG_SUB add
+#define LONG_SUBI subi
+#define LONG_SUBU subu
+#define LONG_SUBIU subu
+#define LONG_L lw
+#define LONG_S sw
+#define LONG_SLL sll
+#define LONG_SLLV sllv
+#define LONG_SRL srl
+#define LONG_SRLV srlv
+#define LONG_SRA sra
+#define LONG_SRAV srav
+#endif
+
+#if (_MIPS_SZLONG == 64)
+#define LONG_ADD dadd
+#define LONG_ADDI daddi
+#define LONG_ADDU daddu
+#define LONG_ADDIU daddiu
+#define LONG_SUB dadd
+#define LONG_SUBI dsubi
+#define LONG_SUBU dsubu
+#define LONG_SUBIU dsubu
+#define LONG_L ld
+#define LONG_S sd
+#define LONG_SLL dsll
+#define LONG_SLLV dsllv
+#define LONG_SRL dsrl
+#define LONG_SRLV dsrlv
+#define LONG_SRA dsra
+#define LONG_SRAV dsrav
+#endif
+
+/*
+ * How to add/sub/load/store/shift pointers.
+ */
+#if (_MIPS_SZLONG == 32)
+#define PTR_ADD add
+#define PTR_ADDI addi
+#define PTR_ADDU addu
+#define PTR_ADDIU addiu
+#define PTR_SUB add
+#define PTR_SUBI subi
+#define PTR_SUBU subu
+#define PTR_SUBIU subu
+#define PTR_L lw
+#define PTR_S sw
+#define PTR_SLL sll
+#define PTR_SLLV sllv
+#define PTR_SRL srl
+#define PTR_SRLV srlv
+#define PTR_SRA sra
+#define PTR_SRAV srav
+
+#define PTR_SCALESHIFT 2
+#endif
+
+#if (_MIPS_SZLONG == 64)
+#define PTR_ADD dadd
+#define PTR_ADDI daddi
+#define PTR_ADDU daddu
+#define PTR_ADDIU daddiu
+#define PTR_SUB dadd
+#define PTR_SUBI dsubi
+#define PTR_SUBU dsubu
+#define PTR_SUBIU dsubu
+#define PTR_L ld
+#define PTR_S sd
+#define PTR_SLL dsll
+#define PTR_SLLV dsllv
+#define PTR_SRL dsrl
+#define PTR_SRLV dsrlv
+#define PTR_SRA dsra
+#define PTR_SRAV dsrav
+
+#define PTR_SCALESHIFT 3
+#endif
+
+/*
+ * Some cp0 registers were extended to 64bit for MIPS III.
+ */
+#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2)
+#define MFC0 mfc0
+#define MTC0 mtc0
+#endif
+#if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) ||
\
+ (_MIPS_ISA == _MIPS_ISA_MIPS5)
+#define MFC0 dmfc0
+#define MTC0 dmtc0
+#endif
+
+#endif /* sys/asm.h */
diff -urN uClibc/libc/sysdeps/linux/mips/sysdep.S
uClibc-new/libc/sysdeps/linux/mips/sysdep.S
--- uClibc/libc/sysdeps/linux/mips/sysdep.S Wed Dec 31 18:00:00 1969
+++ uClibc-new/libc/sysdeps/linux/mips/sysdep.S Tue May 21 10:57:04 2002
@@ -0,0 +1,101 @@
+/* Copyright (C) 1992,93,94,97,98,99,2000 Free Software Foundation,
Inc.
+ This file is part of the GNU C Library.
+ Contributed by Brendan Kehoe (brendan at zen.org).
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#define _ERRNO_H
+#include <bits/errno.h>
+
+#ifdef _LIBC_REENTRANT
+
+ENTRY(__syscall_error)
+#ifdef __PIC__
+ .set noreorder
+ .set noat
+ move $1, $31
+ bltzal $0, 0f
+ nop
+0: .cpload $31
+ move $31, $1
+ .set at
+ .set reorder
+#endif
+ subu sp, 32
+#ifdef __PIC__
+ .cprestore 16
+#endif
+ sw v0, 20(sp)
+ sw ra, 24(sp)
+
+#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
+ /* We translate the system's EWOULDBLOCK error into EAGAIN.
+ The GNU C library always defines EWOULDBLOCK==EAGAIN.
+ EWOULDBLOCK_sys is the original number. */
+ bne v0, EWOULDBLOCK_sys, skip
+ nop
+ li v0, EAGAIN
+skip:
+#endif
+ /* Store it in the "real" variable ... */
+ sw v0, errno
+
+ /* Find our per-thread errno address */
+ jal __errno_location
+
+ /* Store the error value. */
+ lw t0, 20(sp)
+ sw t0, 0(v0)
+
+ /* And just kick back a -1. */
+ lw ra, 24(sp)
+ addiu sp, 32
+ li v0, -1
+ j ra
+ END(__syscall_error)
+
+#else /* _LIBC_REENTRANT */
+
+
+ENTRY(__syscall_error)
+#ifdef __PIC__
+ .set noreorder
+ .set noat
+ move $1, $31
+ bltzal $0, 0f
+ nop
+0: .cpload $31
+ move $31, $1
+ .set at
+ .set reorder
+#endif
+#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
+ /* We translate the system's EWOULDBLOCK error into EAGAIN.
+ The GNU C library always defines EWOULDBLOCK==EAGAIN.
+ EWOULDBLOCK_sys is the original number. */
+ bne v0, EWOULDBLOCK_sys, skip
+ li v0, EAGAIN
+skip:
+#endif
+ /* Store it in errno... */
+ sw v0, errno
+
+ /* And just kick back a -1. */
+ li v0, -1
+ j ra
+ END(__syscall_error)
+#endif /* _LIBC_REENTRANT */
diff -urN uClibc/libc/sysdeps/linux/mips/sysdep.h
uClibc-new/libc/sysdeps/linux/mips/sysdep.h
--- uClibc/libc/sysdeps/linux/mips/sysdep.h Wed Dec 31 18:00:00 1969
+++ uClibc-new/libc/sysdeps/linux/mips/sysdep.h Tue May 21 09:53:52 2002
@@ -0,0 +1,82 @@
+/* Copyright (C) 1992,95,97,99,2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Brendan Kehoe (brendan at zen.org).
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* Changed code for uClib from glibc */
+
+/* include <sysdeps/unix/sysdep.h> */
+
+#include "bits/syscalls.h"
+#include <sys/asm.h>
+
+/* End of changed code for uClibc. */
+
+#ifdef __ASSEMBLER__
+
+#include <regdef.h>
+
+#define ENTRY(name) \
+ .globl name; \
+ .align 2; \
+ .ent name,0; \
+ name##:
+
+/* Note that while it's better structurally, going back to call
__syscall_error
+ can make things confusing if you're debugging---it looks like it's
jumping
+ backwards into the previous fn. */
+#ifdef __PIC__
+ #define PSEUDO(name, syscall_name, args) \
+ .align 2; \
+ 99: la t9,__syscall_error; \
+ jr t9; \
+ ENTRY(name) \
+ .set noreorder; \
+ .cpload t9; \
+ li v0, SYS_ify(syscall_name); \
+ syscall; \
+ .set reorder; \
+ bne a3, zero, 99b; \
+syse1:
+#else
+#define PSEUDO(name, syscall_name, args) \
+ .set noreorder; \
+ .align 2; \
+ 99: j __syscall_error; \
+ ENTRY(name) \
+ .set noreorder; \
+ li v0, SYS_ify(syscall_name); \
+ syscall; \
+ .set reorder; \
+ bne a3, zero, 99b; \
+syse1:
+#endif
+
+#undef PSEUDO_END
+#define PSEUDO_END(sym) .end sym
+
+#define ret j ra ; nop
+
+#undef END
+#define END(sym) .end sym
+
+#define r0 v0
+#define r1 v1
+/* The mips move insn is d,s. */
+#define MOVE(x,y) move y , x
+
+#endif
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