diff options
author | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-05-18 18:41:24 +0200 |
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committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-05-18 18:41:24 +0200 |
commit | 6a8ccc95528f5e86a8770ed15ce89609b5b3dee9 (patch) | |
tree | bbd4df35b4d4a6a8b00d7a5e61fb2668b850ad62 /libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h | |
parent | 398a27a5b323956344b4f831d892fed3bd9813c7 (diff) |
remove linuxthreads.new, rename linuxthreads.old
Linuxthreads.new isn't really useful with the existence
of NPTL/TLS for well supported architectures. There is no
reason to use LT.new for ARM/MIPS or other architectures
supporting NPTL/TLS. It is not available for noMMU architectures
like Blackfin or FR-V. To simplify the live of the few uClibc-ng
developers, LT.new is removed and LT.old is renamed to LT.
LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h')
-rw-r--r-- | libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h | 156 |
1 files changed, 10 insertions, 146 deletions
diff --git a/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h b/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h index 0e0851e1e..ed1fa30b1 100644 --- a/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h +++ b/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h @@ -20,7 +20,7 @@ #ifndef _PT_MACHINE_H #define _PT_MACHINE_H 1 -# include <features.h> +#include <features.h> #ifndef __ASSEMBLER__ # include <stddef.h> /* For offsetof. */ @@ -32,6 +32,9 @@ # define PT_EI __extern_always_inline # endif +extern long int testandset (int *); +extern int __compare_and_swap (long int *, long int, long int); + /* Get some notion of the current stack. Need not be exactly the top of the stack, just something somewhere in the current frame. */ # define CURRENT_STACK_FRAME stack_pointer @@ -40,14 +43,14 @@ register char * stack_pointer __asm__ ("%rsp") __attribute_used__; /* Spinlock implementation; required. */ PT_EI long int -testandset (int *spinlock) +testandset (int *__spinlock) { long int ret; __asm__ __volatile__ ( "xchgl %k0, %1" - : "=r"(ret), "=m"(*spinlock) - : "0"(1), "m"(*spinlock) + : "=r"(ret), "=m"(*__spinlock) + : "0"(1), "m"(*__spinlock) : "memory"); return ret; @@ -58,157 +61,18 @@ testandset (int *spinlock) # define HAS_COMPARE_AND_SWAP PT_EI int -__compare_and_swap (long int *p, long int oldval, long int newval) +__compare_and_swap (long int *__p, long int __oldval, long int __newval) { char ret; long int readval; __asm__ __volatile__ ("lock; cmpxchgq %3, %1; sete %0" - : "=q" (ret), "=m" (*p), "=a" (readval) - : "r" (newval), "m" (*p), "a" (oldval) + : "=q" (ret), "=m" (*__p), "=a" (readval) + : "r" (__newval), "m" (*__p), "a" (__oldval) : "memory"); return ret; } -/* Return the thread descriptor for the current thread. - - The contained asm must *not* be marked volatile since otherwise - assignments like - pthread_descr self = thread_self(); - do not get optimized away. */ -# define THREAD_SELF \ -({ \ - register pthread_descr __self; \ - __asm__ ("movq %%fs:%c1,%0" : "=r" (__self) \ - : "i" (offsetof (struct _pthread_descr_struct, \ - p_header.data.self))); \ - __self; \ -}) - -/* Prototype for the system call. */ -extern int arch_prctl (int __code, unsigned long __addr); - -/* Initialize the thread-unique value. */ -# define INIT_THREAD_SELF(descr, nr) \ -{ \ - if (arch_prctl (ARCH_SET_FS, (unsigned long)descr) != 0) \ - abort (); \ -} - -/* Read member of the thread descriptor directly. */ -# define THREAD_GETMEM(descr, member) \ -({ \ - __typeof__ (descr->member) __value; \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %%fs:%P2,%b0" \ - : "=q" (__value) \ - : "0" (0), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %%fs:%P2,%k0" \ - : "=r" (__value) \ - : "0" (0), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movq %%fs:%P1,%0" \ - : "=r" (__value) \ - : "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - } \ - __value; \ -}) - -/* Same as THREAD_GETMEM, but the member offset can be non-constant. */ -# define THREAD_GETMEM_NC(descr, member) \ -({ \ - __typeof__ (descr->member) __value; \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %%fs:(%2),%b0" \ - : "=q" (__value) \ - : "0" (0), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %%fs:(%2),%k0" \ - : "=r" (__value) \ - : "0" (0), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movq %%fs:(%1),%0" \ - : "=r" (__value) \ - : "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - } \ - __value; \ -}) - -/* Set member of the thread descriptor directly. */ -# define THREAD_SETMEM(descr, member, value) \ -({ \ - __typeof__ (descr->member) __value = (value); \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %0,%%fs:%P1" : \ - : "q" (__value), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %k0,%%fs:%P1" : \ - : "r" (__value), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movq %0,%%fs:%P1" : \ - : "r" (__value), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - } \ -}) - -/* Same as THREAD_SETMEM, but the member offset can be non-constant. */ -# define THREAD_SETMEM_NC(descr, member, value) \ -({ \ - __typeof__ (descr->member) __value = (value); \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %0,%%fs:(%1)" : \ - : "q" (__value), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %k0,%%fs:(%1)" : \ - : "r" (__value), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movq %0,%%fs:(%1)" : \ - : "r" (__value), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - } \ -}) - #endif /* !__ASSEMBLER__ */ /* We want the OS to assign stack addresses. */ |