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[153.223.134.223]) by smtp.googlemail.com with ESMTPSA id 98e67ed59e1d1-354862effa6sm2378920a91.9.2026.02.04.04.46.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Feb 2026 04:46:10 -0800 (PST) From: Daniel Palmer To: w@1wt.eu, linux@weissschuh.net Cc: linux-kernel@vger.kernel.org, Daniel Palmer Subject: [RFC PATCH v2 05/10] tools/nolibc: x86: Add relocation support Date: Wed, 4 Feb 2026 21:45:37 +0900 Message-ID: <20260204124542.523567-6-daniel@thingy.jp> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260204124542.523567-1-daniel@thingy.jp> References: <20260204124542.523567-1-daniel@thingy.jp> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add relocation support for x86, both 32bit and 64bit (including x32). Signed-off-by: Daniel Palmer --- tools/include/nolibc/arch-x86.h | 53 +++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/tools/include/nolibc/arch-x86.h b/tools/include/nolibc/arch-x8= 6.h index f6c43ac5377b..263734c56537 100644 --- a/tools/include/nolibc/arch-x86.h +++ b/tools/include/nolibc/arch-x86.h @@ -7,8 +7,29 @@ #ifndef _NOLIBC_ARCH_X86_H #define _NOLIBC_ARCH_X86_H =20 +#include "elf.h" + +/* x86_64 and x32 */ +#if defined(__x86_64__) +#if defined(R_AMD64_RELATIVE) +#define _NOLIBC_ARCH_HAS_RELOC +#endif +/* x32 uses ELF32 */ +#if defined(__ILP32__) +#define _NOLIBC_ARCH_ELF32 +#endif +/* i386 */ +#else +#if defined(R_386_RELATIVE) +#define _NOLIBC_ARCH_HAS_RELOC +#define _NOLIBC_ARCH_ELF32 +#define _NOLIBC_ARCH_ELF_REL +#endif +#endif + #include "compiler.h" #include "crt.h" +#include "reloc.h" =20 #if !defined(__x86_64__) =20 @@ -158,6 +179,22 @@ }) =20 #ifndef NOLIBC_NO_RUNTIME + +#ifdef NOLIBC_WANT_RELOC +static __inline__ int __relocate_rel(unsigned long base, _nolibc_elf_rel *= entry) +{ + switch (_nolibc_elf_r_type(entry->r_info)) { + case R_386_RELATIVE: + __relocate_rel_relative(base, entry); + break; + default: + return -1; + } + + return 0; +} +#endif /* NOLIBC_WANT_RELOC */ + /* startup code */ /* * i386 System V ABI mandates: @@ -326,6 +363,22 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoi= nt __no_stack_protector _s }) =20 #ifndef NOLIBC_NO_RUNTIME + +#ifdef NOLIBC_WANT_RELOC +static __inline__ int __relocate_rela(unsigned long base, _nolibc_elf_rela= *entry) +{ + switch (_nolibc_elf_r_type(entry->r_info)) { + case R_AMD64_RELATIVE: + __relocate_rela_relative(base, entry); + break; + default: + return -1; + } + + return 0; +} +#endif /* NOLIBC_WANT_RELOC */ + /* startup code */ /* * x86-64 System V ABI mandates: --=20 2.51.0