From b3c8afe272a6919248986c703c2e1defc73ff707 Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Thu, 5 Jun 2025 19:37:46 +0200
Subject: [PATCH] Fix GH-18743: Incompatibility in Inline TLS Assembly on
 Alpine 3.22

GAS started checking the relocation for tlsgd: it must use the %rdi
register. However, the inline assembly now uses %rax instead.
Fix it by changing the "=a" output register to "=D".
Source: https://github.com/bminor/binutils-gdb/blob/ec181e1710e37007a8d95c284609bfaa5868d086/gas/config/tc-i386.c#L6793

gottpoff is unaffected.

Closes GH-18779.
---
 NEWS                              | 4 ++++
 ext/opcache/jit/zend_jit_x86.dasc | 6 +++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/NEWS b/NEWS
index 2208cd6e59a..bf705c1da0b 100644
--- a/NEWS
+++ b/NEWS
@@ -24,6 +24,10 @@ PHP                                                                        NEWS
 - ODBC:
   . Fix memory leak on php_odbc_fetch_hash() failure. (nielsdos)
 
+- Opcache:
+  . Fixed bug GH-18743 (Incompatibility in Inline TLS Assembly on Alpine 3.22).
+    (nielsdos, Arnaud)
+
 - OpenSSL:
   . Fix memory leak of X509_STORE in php_openssl_setup_verify() on failure.
     (nielsdos)
diff --git a/ext/opcache/jit/zend_jit_x86.dasc b/ext/opcache/jit/zend_jit_x86.dasc
index 1f1abb59a1c..7061f6b2b73 100644
--- a/ext/opcache/jit/zend_jit_x86.dasc
+++ b/ext/opcache/jit/zend_jit_x86.dasc
@@ -2910,7 +2910,7 @@ static int zend_jit_setup(void)
 
 		__asm__(
 			"leaq _tsrm_ls_cache@tlsgd(%%rip), %0\n"
-			: "=a" (ti));
+			: "=D" (ti));
 		tsrm_tls_offset = ti[1];
 		tsrm_tls_index = ti[0] * 8;
 #elif defined(__FreeBSD__)
@@ -2918,7 +2918,7 @@ static int zend_jit_setup(void)
 
 		__asm__(
 			"leaq _tsrm_ls_cache@tlsgd(%%rip), %0\n"
-			: "=a" (ti));
+			: "=D" (ti));
 		tsrm_tls_offset = ti[1];
 		/* Index is offset by 1 on FreeBSD (https://github.com/freebsd/freebsd-src/blob/bf56e8b9c8639ac4447d223b83cdc128107cc3cd/libexec/rtld-elf/rtld.c#L5260) */
 		tsrm_tls_index = (ti[0] + 1) * 8;
@@ -2927,7 +2927,7 @@ static int zend_jit_setup(void)
 
 		__asm__(
 			"leaq _tsrm_ls_cache@tlsgd(%%rip), %0\n"
-			: "=a" (ti));
+			: "=D" (ti));
 		tsrm_tls_offset = ti[1];
 		tsrm_tls_index = ti[0] * 16;
 #endif