diff options
Diffstat (limited to 'sysdeps/aarch64/dl-tlsdesc.S')
| -rw-r--r-- | sysdeps/aarch64/dl-tlsdesc.S | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/sysdeps/aarch64/dl-tlsdesc.S b/sysdeps/aarch64/dl-tlsdesc.S index 3b2da62f39..70550c7ce0 100644 --- a/sysdeps/aarch64/dl-tlsdesc.S +++ b/sysdeps/aarch64/dl-tlsdesc.S @@ -80,30 +80,6 @@ _dl_tlsdesc_return: cfi_endproc .size _dl_tlsdesc_return, .-_dl_tlsdesc_return - /* Same as _dl_tlsdesc_return but with synchronization for - lazy relocation. - Prototype: - _dl_tlsdesc_return_lazy (tlsdesc *) ; - */ - .hidden _dl_tlsdesc_return_lazy - .global _dl_tlsdesc_return_lazy - .type _dl_tlsdesc_return_lazy,%function - cfi_startproc - .align 2 -_dl_tlsdesc_return_lazy: - /* The ldar here happens after the load from [x0] at the call site - (that is generated by the compiler as part of the TLS access ABI), - so it reads the same value (this function is the final value of - td->entry) and thus it synchronizes with the release store to - td->entry in _dl_tlsdesc_resolve_rela_fixup ensuring that the load - from [x0,#PTR_SIZE] here happens after the initialization of td->arg. */ - DELOUSE (0) - ldar PTR_REG (zr), [x0] - ldr PTR_REG (0), [x0, #PTR_SIZE] - RET - cfi_endproc - .size _dl_tlsdesc_return_lazy, .-_dl_tlsdesc_return_lazy - /* Handler for undefined weak TLS symbols. Prototype: _dl_tlsdesc_undefweak (tlsdesc *); @@ -121,14 +97,7 @@ _dl_tlsdesc_return_lazy: _dl_tlsdesc_undefweak: str x1, [sp, #-16]! cfi_adjust_cfa_offset (16) - /* The ldar here happens after the load from [x0] at the call site - (that is generated by the compiler as part of the TLS access ABI), - so it reads the same value (this function is the final value of - td->entry) and thus it synchronizes with the release store to - td->entry in _dl_tlsdesc_resolve_rela_fixup ensuring that the load - from [x0,#8] here happens after the initialization of td->arg. */ DELOUSE (0) - ldar PTR_REG (zr), [x0] ldr PTR_REG (0), [x0, #PTR_SIZE] mrs x1, tpidr_el0 sub PTR_REG (0), PTR_REG (0), PTR_REG (1) @@ -192,13 +161,6 @@ _dl_tlsdesc_dynamic: cfi_rel_offset (x4, 32+24) mrs x4, tpidr_el0 - /* The ldar here happens after the load from [x0] at the call site - (that is generated by the compiler as part of the TLS access ABI), - so it reads the same value (this function is the final value of - td->entry) and thus it synchronizes with the release store to - td->entry in _dl_tlsdesc_resolve_rela_fixup ensuring that the load - from [x0,#PTR_SIZE] here happens after the initialization of td->arg. */ - ldar PTR_REG (zr), [x0] ldr PTR_REG (1), [x0,#TLSDESC_ARG] ldr PTR_REG (0), [x4,#TCBHEAD_DTV] ldr PTR_REG (3), [x1,#TLSDESC_GEN_COUNT] @@ -276,168 +238,3 @@ _dl_tlsdesc_dynamic: .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic # undef NSAVEXREGPAIRS #endif - - /* This function is a wrapper for a lazy resolver for TLS_DESC - RELA relocations. - When the actual resolver returns, it will have adjusted the - TLS descriptor such that we can tail-call it for it to return - the TP offset of the symbol. */ - - .hidden _dl_tlsdesc_resolve_rela - .global _dl_tlsdesc_resolve_rela - .type _dl_tlsdesc_resolve_rela,%function - cfi_startproc - .align 2 -_dl_tlsdesc_resolve_rela: -#define NSAVEXREGPAIRS 9 - /* The tlsdesc PLT entry pushes x2 and x3 to the stack. */ - cfi_adjust_cfa_offset (16) - cfi_rel_offset (x2, 0) - cfi_rel_offset (x3, 8) - stp x29, x30, [sp, #-(32+16*NSAVEXREGPAIRS)]! - cfi_adjust_cfa_offset (32+16*NSAVEXREGPAIRS) - cfi_rel_offset (x29, 0) - cfi_rel_offset (x30, 8) - mov x29, sp - stp x1, x4, [sp, #32+16*0] - stp x5, x6, [sp, #32+16*1] - stp x7, x8, [sp, #32+16*2] - stp x9, x10, [sp, #32+16*3] - stp x11, x12, [sp, #32+16*4] - stp x13, x14, [sp, #32+16*5] - stp x15, x16, [sp, #32+16*6] - stp x17, x18, [sp, #32+16*7] - str x0, [sp, #32+16*8] - cfi_rel_offset (x1, 32) - cfi_rel_offset (x4, 32+8) - cfi_rel_offset (x5, 32+16) - cfi_rel_offset (x6, 32+16+8) - cfi_rel_offset (x7, 32+16*2) - cfi_rel_offset (x8, 32+16*2+8) - cfi_rel_offset (x9, 32+16*3) - cfi_rel_offset (x10, 32+16*3+8) - cfi_rel_offset (x11, 32+16*4) - cfi_rel_offset (x12, 32+16*4+8) - cfi_rel_offset (x13, 32+16*5) - cfi_rel_offset (x14, 32+16*5+8) - cfi_rel_offset (x15, 32+16*6) - cfi_rel_offset (x16, 32+16*6+8) - cfi_rel_offset (x17, 32+16*7) - cfi_rel_offset (x18, 32+16*7+8) - cfi_rel_offset (x0, 32+16*8) - - SAVE_Q_REGISTERS - - DELOUSE (3) - ldr PTR_REG (1), [x3, #PTR_SIZE] - bl _dl_tlsdesc_resolve_rela_fixup - - RESTORE_Q_REGISTERS - - ldr x0, [sp, #32+16*8] - DELOUSE (0) - ldr PTR_REG (1), [x0] - blr x1 - - ldp x1, x4, [sp, #32+16*0] - ldp x5, x6, [sp, #32+16*1] - ldp x7, x8, [sp, #32+16*2] - ldp x9, x10, [sp, #32+16*3] - ldp x11, x12, [sp, #32+16*4] - ldp x13, x14, [sp, #32+16*5] - ldp x15, x16, [sp, #32+16*6] - ldp x17, x18, [sp, #32+16*7] - ldp x29, x30, [sp], #(32+16*NSAVEXREGPAIRS) - cfi_adjust_cfa_offset (-32-16*NSAVEXREGPAIRS) - cfi_restore (x29) - cfi_restore (x30) - ldp x2, x3, [sp], #16 - cfi_adjust_cfa_offset (-16) - RET -#undef NSAVEXREGPAIRS - cfi_endproc - .size _dl_tlsdesc_resolve_rela, .-_dl_tlsdesc_resolve_rela - - /* This function is a placeholder for lazy resolving of TLS - relocations. Once some thread starts resolving a TLS - relocation, it sets up the TLS descriptor to use this - resolver, such that other threads that would attempt to - resolve it concurrently may skip the call to the original lazy - resolver and go straight to a condition wait. - - When the actual resolver returns, it will have adjusted the - TLS descriptor such that we can tail-call it for it to return - the TP offset of the symbol. */ - - .hidden _dl_tlsdesc_resolve_hold - .global _dl_tlsdesc_resolve_hold - .type _dl_tlsdesc_resolve_hold,%function - cfi_startproc - .align 2 -_dl_tlsdesc_resolve_hold: -#define NSAVEXREGPAIRS 10 -1: - stp x29, x30, [sp, #-(32+16*NSAVEXREGPAIRS)]! - cfi_adjust_cfa_offset (32+16*NSAVEXREGPAIRS) - cfi_rel_offset (x29, 0) - cfi_rel_offset (x30, 8) - mov x29, sp - stp x1, x2, [sp, #32+16*0] - stp x3, x4, [sp, #32+16*1] - stp x5, x6, [sp, #32+16*2] - stp x7, x8, [sp, #32+16*3] - stp x9, x10, [sp, #32+16*4] - stp x11, x12, [sp, #32+16*5] - stp x13, x14, [sp, #32+16*6] - stp x15, x16, [sp, #32+16*7] - stp x17, x18, [sp, #32+16*8] - str x0, [sp, #32+16*9] - cfi_rel_offset (x1, 32) - cfi_rel_offset (x2, 32+8) - cfi_rel_offset (x3, 32+16) - cfi_rel_offset (x4, 32+16+8) - cfi_rel_offset (x5, 32+16*2) - cfi_rel_offset (x6, 32+16*2+8) - cfi_rel_offset (x7, 32+16*3) - cfi_rel_offset (x8, 32+16*3+8) - cfi_rel_offset (x9, 32+16*4) - cfi_rel_offset (x10, 32+16*4+8) - cfi_rel_offset (x11, 32+16*5) - cfi_rel_offset (x12, 32+16*5+8) - cfi_rel_offset (x13, 32+16*6) - cfi_rel_offset (x14, 32+16*6+8) - cfi_rel_offset (x15, 32+16*7) - cfi_rel_offset (x16, 32+16*7+8) - cfi_rel_offset (x17, 32+16*8) - cfi_rel_offset (x18, 32+16*8+8) - cfi_rel_offset (x0, 32+16*9) - - SAVE_Q_REGISTERS - - adr x1, 1b - bl _dl_tlsdesc_resolve_hold_fixup - - RESTORE_Q_REGISTERS - - ldr x0, [sp, #32+16*9] - DELOUSE (0) - ldr PTR_REG (1), [x0] - blr x1 - - ldp x1, x2, [sp, #32+16*0] - ldp x3, x4, [sp, #32+16*1] - ldp x5, x6, [sp, #32+16*2] - ldp x7, x8, [sp, #32+16*3] - ldp x9, x10, [sp, #32+16*4] - ldp x11, x12, [sp, #32+16*5] - ldp x13, x14, [sp, #32+16*6] - ldp x15, x16, [sp, #32+16*7] - ldp x17, x18, [sp, #32+16*8] - ldp x29, x30, [sp], #(32+16*NSAVEXREGPAIRS) - cfi_adjust_cfa_offset (-32-16*NSAVEXREGPAIRS) - cfi_restore (x29) - cfi_restore (x30) - RET - cfi_endproc - .size _dl_tlsdesc_resolve_hold, .-_dl_tlsdesc_resolve_hold -#undef NSAVEXREGPAIRS |