mirror of
https://github.com/golang/go
synced 2024-11-24 02:20:18 -07:00
7d507dc6e6
There is an enormous amount of code moving around in this CL, but the code is the same, and it is invoked in the same ways. This CL is preparation for the new linker structure, not the new structure itself. The new library's definition is in include/link.h. The main change is the use of a Link structure to hold all the linker-relevant state, replacing the smattering of global variables. The Link structure should both make it clearer which state must be carried around and make it possible to parallelize more easily later. The main body of the linker has moved into the architecture-independent cmd/ld directory. That includes the list of known header types, so the distinction between Hplan9x32 and Hplan9x64 is removed (no other header type distinguished 32- and 64-bit formats), and code for unused formats such as ipaq kernels has been deleted. The code being deleted from 5l, 6l, and 8l reappears in liblink or in ld. Because multiple files are being merged in the liblink directory, it is not possible to show the diffs nicely in hg. The Prog and Addr structures have been unified into an architecture-independent form and moved to link.h, where they will be shared by all tools: the assemblers, the compilers, and the linkers. The unification makes it possible to write architecture-independent traversal of Prog lists, among other benefits. The Sym structures cannot be unified: they are too fundamentally different between the linker and the compilers. Instead, liblink defines an LSym - a linker Sym - to be used in the Prog and Addr structures, and the linker now refers exclusively to LSyms. The compilers will keep using their own syms but will fill out the corresponding LSyms in the Prog and Addr structures. Although code from 5l, 6l, and 8l is now in a single library, the code has been arranged so that only one architecture needs to be linked into a particular program: 5l will not contain the code needed for x86 instruction layout, for example. The object file writing code in liblink/obj.c is from cmd/gc/obj.c. Preparation for golang.org/s/go13linker work. This CL does not build by itself. It depends on 35740044 and will be submitted at the same time. R=iant CC=golang-dev https://golang.org/cl/35790044
233 lines
5.6 KiB
C
233 lines
5.6 KiB
C
/*
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Plan 9 from User Space include/u.h
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http://code.swtch.com/plan9port/src/tip/include/u.h
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Copyright 2001-2007 Russ Cox. All Rights Reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef _U_H_
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#define _U_H_ 1
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#define __BSD_VISIBLE 1 /* FreeBSD 5.x */
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#if defined(__sun__)
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# define __EXTENSIONS__ 1 /* SunOS */
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# if defined(__SunOS5_6__) || defined(__SunOS5_7__) || defined(__SunOS5_8__)
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/* NOT USING #define __MAKECONTEXT_V2_SOURCE 1 / * SunOS */
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# else
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# define __MAKECONTEXT_V2_SOURCE 1
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# endif
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#endif
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#define _BSD_SOURCE 1
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#define _NETBSD_SOURCE 1 /* NetBSD */
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#define _SVID_SOURCE 1
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#if !defined(__APPLE__) && !defined(__OpenBSD__)
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# define _XOPEN_SOURCE 1000
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# define _XOPEN_SOURCE_EXTENDED 1
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#endif
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#if defined(__FreeBSD__)
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# include <sys/cdefs.h>
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/* for strtoll */
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# undef __ISO_C_VISIBLE
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# define __ISO_C_VISIBLE 1999
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# undef __LONG_LONG_SUPPORTED
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# define __LONG_LONG_SUPPORTED
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#endif
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#define _LARGEFILE64_SOURCE 1
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#define _FILE_OFFSET_BITS 64
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#include <inttypes.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <fcntl.h>
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#include <assert.h>
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#include <setjmp.h>
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#include <stddef.h>
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#include <math.h>
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#include <ctype.h> /* for tolower */
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#include <signal.h>
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#include <time.h>
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/*
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* OS-specific crap
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*/
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#define _NEEDUCHAR 1
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#define _NEEDUSHORT 1
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#define _NEEDUINT 1
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#define _NEEDULONG 1
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#ifdef _WIN32
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typedef jmp_buf sigjmp_buf;
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#endif
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typedef long p9jmp_buf[sizeof(sigjmp_buf)/sizeof(long)];
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#if defined(__linux__)
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# include <sys/types.h>
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# if defined(__Linux26__)
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# include <pthread.h>
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# define PLAN9PORT_USING_PTHREADS 1
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# endif
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# if defined(__USE_MISC)
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# undef _NEEDULONG
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# endif
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#elif defined(__sun__)
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# include <sys/types.h>
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# include <pthread.h>
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# define PLAN9PORT_USING_PTHREADS 1
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# undef _NEEDULONG
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# define nil 0 /* no cast to void* */
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#elif defined(__FreeBSD__)
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# include <sys/types.h>
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# include <osreldate.h>
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# if __FreeBSD_version >= 500000
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# define PLAN9PORT_USING_PTHREADS 1
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# include <pthread.h>
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# endif
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# if !defined(_POSIX_SOURCE)
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# endif
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#elif defined(__APPLE__)
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# include <sys/types.h>
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# include <pthread.h>
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# define PLAN9PORT_USING_PTHREADS 1
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# if __GNUC__ < 4
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# endif
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# undef _ANSI_SOURCE
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# undef _POSIX_C_SOURCE
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# undef _XOPEN_SOURCE
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# if !defined(NSIG)
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# define NSIG 32
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# endif
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# define _NEEDLL 1
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#elif defined(__NetBSD__)
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# include <sched.h>
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# include <sys/types.h>
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# undef _NEEDULONG
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#elif defined(__OpenBSD__)
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# include <sys/types.h>
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# undef _NEEDULONG
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#elif defined(_WIN32)
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#else
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/* No idea what system this is -- try some defaults */
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# include <pthread.h>
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# define PLAN9PORT_USING_PTHREADS 1
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#endif
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#ifndef O_DIRECT
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#define O_DIRECT 0
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#endif
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typedef signed char schar;
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#ifdef _NEEDUCHAR
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typedef unsigned char uchar;
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#endif
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#ifdef _NEEDUSHORT
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typedef unsigned short ushort;
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#endif
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#ifdef _NEEDUINT
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typedef unsigned int uint;
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#endif
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#ifdef _NEEDULONG
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typedef unsigned long ulong;
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#endif
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typedef unsigned long long uvlong;
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typedef long long vlong;
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typedef uint64_t u64int;
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typedef int64_t s64int;
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typedef uint8_t u8int;
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typedef int8_t s8int;
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typedef uint16_t u16int;
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typedef int16_t s16int;
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typedef uintptr_t uintptr;
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typedef intptr_t intptr;
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typedef uint32_t u32int;
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typedef int32_t s32int;
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typedef s8int int8;
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typedef u8int uint8;
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typedef s16int int16;
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typedef u16int uint16;
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typedef s32int int32;
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typedef u32int uint32;
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typedef s64int int64;
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typedef u64int uint64;
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typedef float float32;
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typedef double float64;
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#undef _NEEDUCHAR
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#undef _NEEDUSHORT
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#undef _NEEDUINT
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#undef _NEEDULONG
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#define getcallerpc(x) __builtin_return_address(0)
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#ifndef SIGBUS
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#define SIGBUS SIGSEGV /* close enough */
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#endif
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/*
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* Funny-named symbols to tip off 9l to autolink.
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*/
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#define AUTOLIB(x) static int __p9l_autolib_ ## x = 1;
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#define AUTOFRAMEWORK(x) static int __p9l_autoframework_ ## x = 1;
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/*
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* Gcc is too smart for its own good.
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*/
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#if defined(__GNUC__)
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# undef strcmp /* causes way too many warnings */
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# if __GNUC__ >= 4 || (__GNUC__==3 && !defined(__APPLE_CC__) && !defined(_WIN32))
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# undef AUTOLIB
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# define AUTOLIB(x) int __p9l_autolib_ ## x __attribute__ ((weak));
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# undef AUTOFRAMEWORK
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# define AUTOFRAMEWORK(x) int __p9l_autoframework_ ## x __attribute__ ((weak));
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# else
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# undef AUTOLIB
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# define AUTOLIB(x) static int __p9l_autolib_ ## x __attribute__ ((unused));
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# undef AUTOFRAMEWORK
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# define AUTOFRAMEWORK(x) static int __p9l_autoframework_ ## x __attribute__ ((unused));
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# endif
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#endif
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#if defined(__cplusplus)
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}
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#endif
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#endif
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