ext/opcache: zend_jit_resolve_tsrm_ls_cache_offsets() TEXTREL from bare __tls_get_addr call.

Fix GH-22693

The x86_64 General Dynamic TLS sequence called __tls_get_addr without
@plt, which could emit a PC-relative relocation against the external
symbol landing in read-only .text, producing a DT_TEXTREL and a linker
warning about a possible runtime segfault. Routing the call through the
PLT matches the x86-64 TLS ABI canonical sequence and the already
correct i386 variant, without changing the emitted instruction bytes.

Close GH-22801

Author: devnexen

NEWS

@@ -5,6 +5,10 @@ PHP                                                                        NEWS
 - Date:
   . Fixed leak on double DatePeriod::__construct() call. (ilutov)
 
+- Opcache:
+  . Fixed GH-22693 (DT_TEXTREL in JIT-generated TLS access on x86_64).
+    (David Carlier)
+
 - Sockets:
   . Fixed socket_set_option() validation error messages for UDP_SEGMENT and
     SO_LINGER options. (Weilin Du)

ext/opcache/jit/tls/zend_jit_tls_x86_64.c

@@ -102,7 +102,7 @@ zend_result zend_jit_resolve_tsrm_ls_cache_offsets(
 		"leaq   _tsrm_ls_cache@tlsgd(%%rip), %%rdi\n"
 		".word  0x6666\n"
 		"rex64\n"
-		"call   __tls_get_addr\n"
+		"call   __tls_get_addr@PLT\n"
 		/* Load thread pointer address */
 		"movq   %%fs:0, %%rsi\n"
 		: "=a" (addr), "=b" (code), "=S" (thread_pointer)