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- #ifndef _TLS_H
- #define _TLS_H
- # include <pt-machine.h>
- #ifndef __ASSEMBLER__
- # include <stdbool.h>
- # include <stddef.h>
- # include <stdint.h>
- typedef union dtv
- {
- size_t counter;
- void *pointer;
- } dtv_t;
- typedef struct
- {
- void *tcb;
- dtv_t *dtv;
- void *self;
- } tcbhead_t;
- #endif
- #if defined FLOATING_STACKS && defined HAVE_TLS_SUPPORT
- # ifndef __ASSEMBLER__
- # include <sysdep.h>
- # include <linuxthreads/descr.h>
- # define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
- # define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
- # define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct)
- # define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
- # define TLS_TCB_AT_TP 1
- # define INSTALL_DTV(descr, dtvp) \
- ((tcbhead_t *) (descr))->dtv = (dtvp) + 1
- # define INSTALL_NEW_DTV(dtv) \
- ({ struct _pthread_descr_struct *__descr; \
- THREAD_SETMEM (__descr, p_header.data.dtvp, (dtv)); })
- # define GET_DTV(descr) \
- (((tcbhead_t *) (descr))->dtv)
- # ifdef __PIC__
- # define TLS_EBX_ARG "r"
- # define TLS_LOAD_EBX "xchgl %3, %%ebx\n\t"
- # else
- # define TLS_EBX_ARG "b"
- # define TLS_LOAD_EBX
- # endif
- # define TLS_DO_MODIFY_LDT(descr, nr) \
- ({ \
- struct modify_ldt_ldt_s ldt_entry = \
- { nr, (unsigned long int) (descr), 0xfffff , \
- 1, 0, 0, 1, 0, 1, 0 }; \
- int result; \
- __asm__ __volatile__ (TLS_LOAD_EBX \
- "int $0x80\n\t" \
- TLS_LOAD_EBX \
- : "=a" (result) \
- : "0" (__NR_modify_ldt), \
-
- \
- "m" (ldt_entry), TLS_EBX_ARG (1), "c" (&ldt_entry), \
- "d" (sizeof (ldt_entry))); \
- __builtin_expect (result, 0) != 0 ? -1 : nr * 8 + 7; \
- })
- # define TLS_DO_SET_THREAD_AREA(descr, secondcall) \
- ({ \
- struct modify_ldt_ldt_s ldt_entry = \
- { -1, (unsigned long int) (descr), 0xfffff , \
- 1, 0, 0, 1, 0, 1, 0 }; \
- int result; \
- if (secondcall) \
- ldt_entry.entry_number = ({ int _gs; \
- __asm__ ("movw %%gs, %w0" : "=q" (_gs)); \
- (_gs & 0xffff) >> 3; }); \
- __asm__ __volatile__ (TLS_LOAD_EBX \
- "int $0x80\n\t" \
- TLS_LOAD_EBX \
- : "=a" (result), "=m" (ldt_entry.entry_number) \
- : "0" (__NR_set_thread_area), \
-
- \
- TLS_EBX_ARG (&ldt_entry), "m" (ldt_entry)); \
- __builtin_expect (result, 0) == 0 ? ldt_entry.entry_number * 8 + 3 : -1; \
- })
- # ifdef __ASSUME_SET_THREAD_AREA_SYSCALL
- # define TLS_SETUP_GS_SEGMENT(descr, secondcall) \
- TLS_DO_SET_THREAD_AREA (descr, firstcall)
- # elif defined __NR_set_thread_area
- # define TLS_SETUP_GS_SEGMENT(descr, secondcall) \
- ({ int __seg = TLS_DO_SET_THREAD_AREA (descr, secondcall); \
- __seg == -1 ? TLS_DO_MODIFY_LDT (descr, 0) : __seg; })
- # else
- # define TLS_SETUP_GS_SEGMENT(descr, secondcall) \
- TLS_DO_MODIFY_LDT ((descr), 0)
- # endif
- # define TLS_INIT_TP(descr, secondcall) \
- ({ \
- void *_descr = (descr); \
- tcbhead_t *head = _descr; \
- int __gs; \
- \
- head->tcb = _descr; \
- \
- head->self = _descr; \
- \
- __gs = TLS_SETUP_GS_SEGMENT (_descr, secondcall); \
- if (__builtin_expect (__gs, 7) != -1) \
- { \
- __asm__ ("movw %w0, %%gs" : : "q" (__gs)); \
- __gs = 0; \
- } \
- __gs; \
- })
- # define THREAD_DTV() \
- ({ struct _pthread_descr_struct *__descr; \
- THREAD_GETMEM (__descr, p_header.data.dtvp); })
- # endif
- #endif
- #endif
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