glibc/sysdeps/arm/tls-macros.h

73 lines
2.2 KiB
C

#include <sysdep.h> /* For ARCH_HAS_T2. */
#ifdef __thumb2__
# define ARM_PC_OFFSET "4"
#else
# define ARM_PC_OFFSET "8"
#endif
/* Returns the address of data containing ".word SYMBOL(RELOC)". */
#if defined (ARCH_HAS_T2) && !defined (PIC)
# define GET_SPECIAL_RELOC(symbol, reloc) \
({ \
int *__##symbol##_rodata; \
asm ("movw %0, #:lower16:1f\n" \
"movt %0, #:upper16:1f\n" \
".pushsection .rodata.cst4, \"aM\", %%progbits, 4\n" \
".balign 4\n" \
"1: .word " #symbol "(" #reloc ")\n" \
".popsection" \
: "=r" (__##symbol##_rodata)); \
__##symbol##_rodata; \
})
#elif defined (ARCH_HAS_T2) && defined (PIC) && ARM_PCREL_MOVW_OK
# define GET_SPECIAL_RELOC(symbol, reloc) \
({ \
int *__##symbol##_rodata; \
asm ("movw %0, #:lower16:1f - 2f - " ARM_PC_OFFSET "\n" \
"movt %0, #:upper16:1f - 2f - " ARM_PC_OFFSET "\n" \
".pushsection .rodata.cst4, \"aM\", %%progbits, 4\n" \
".balign 4\n" \
"1: .word " #symbol "(" #reloc ")\n" \
".popsection\n" \
"2: add %0, %0, pc" \
: "=r" (__##symbol##_rodata)); \
__##symbol##_rodata; \
})
#else
# define GET_SPECIAL_RELOC(symbol, reloc) \
({ \
int *__##symbol##_rodata; \
asm ("adr %0, 1f\n" \
"b 2f\n" \
".balign 4\n" \
"1: .word " #symbol "(" #reloc ")\n" \
"2:" \
: "=r" (__##symbol##_rodata)); \
__##symbol##_rodata; \
})
#endif
/* Returns the pointer value (SYMBOL(RELOC) + pc - PC_OFS). */
#define GET_SPECIAL_PCREL(symbol, reloc) \
({ \
int *__##symbol##_rodata = GET_SPECIAL_RELOC (symbol, reloc); \
(void *) ((int) __##symbol##_rodata + *__##symbol##_rodata); \
})
#define TLS_LE(x) \
(__builtin_thread_pointer () + *GET_SPECIAL_RELOC (x, tpoff))
#define TLS_IE(x) \
((int *) (__builtin_thread_pointer () \
+ *(int *) GET_SPECIAL_PCREL (x, gottpoff)))
extern void *__tls_get_addr (void *);
#define TLS_LD(x) \
((int *) (__tls_get_addr (GET_SPECIAL_PCREL (x, tlsldm)) \
+ *GET_SPECIAL_RELOC (x, tlsldo)))
#define TLS_GD(x) \
((int *) __tls_get_addr (GET_SPECIAL_PCREL (x, tlsgd)))