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From: Ammar Faizi <[email protected]>
To: Willy Tarreau <[email protected]>
Cc: "Paul E. McKenney" <[email protected]>,
	Alviro Iskandar Setiawan <[email protected]>,
	Nugraha <[email protected]>,
	Linux Kernel Mailing List <[email protected]>,
	GNU/Weeb Mailing List <[email protected]>,
	Ammar Faizi <[email protected]>,
	[email protected]
Subject: [RFC PATCH v1 2/6] tools/nolibc: Make the entry point not weak for clang
Date: Sun, 20 Mar 2022 16:37:46 +0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Budilig with clang yields the following error:
```
  <inline asm>:3:1: error: _start changed binding to STB_GLOBAL
  .global _start
  ^
  1 error generated.
```
Don't make the entry point weak if we're compiling with clang.

Cc: [email protected]
Signed-off-by: Ammar Faizi <[email protected]>
---
 tools/include/nolibc/arch-aarch64.h | 2 ++
 tools/include/nolibc/arch-arm.h     | 2 ++
 tools/include/nolibc/arch-i386.h    | 2 ++
 tools/include/nolibc/arch-mips.h    | 2 ++
 tools/include/nolibc/arch-riscv.h   | 2 ++
 tools/include/nolibc/arch-x86_64.h  | 2 ++
 6 files changed, 12 insertions(+)

diff --git a/tools/include/nolibc/arch-aarch64.h b/tools/include/nolibc/arch-aarch64.h
index 87d9e434820c..5084cd58b429 100644
--- a/tools/include/nolibc/arch-aarch64.h
+++ b/tools/include/nolibc/arch-aarch64.h
@@ -183,7 +183,9 @@ struct sys_stat_struct {
 
 /* startup code */
 asm(".section .text\n"
+#if !defined(__clang__)
     ".weak _start\n"
+#endif
     ".global _start\n"
     "_start:\n"
     "ldr x0, [sp]\n"              // argc (x0) was in the stack
diff --git a/tools/include/nolibc/arch-arm.h b/tools/include/nolibc/arch-arm.h
index 001a3c8c9ad5..b3f135a615a6 100644
--- a/tools/include/nolibc/arch-arm.h
+++ b/tools/include/nolibc/arch-arm.h
@@ -176,7 +176,9 @@ struct sys_stat_struct {
 
 /* startup code */
 asm(".section .text\n"
+#if !defined(__clang__)
     ".weak _start\n"
+#endif
     ".global _start\n"
     "_start:\n"
 #if defined(__THUMBEB__) || defined(__THUMBEL__)
diff --git a/tools/include/nolibc/arch-i386.h b/tools/include/nolibc/arch-i386.h
index d7e4d53325a3..82bf797849ae 100644
--- a/tools/include/nolibc/arch-i386.h
+++ b/tools/include/nolibc/arch-i386.h
@@ -175,7 +175,9 @@ struct sys_stat_struct {
  *
  */
 asm(".section .text\n"
+#if !defined(__clang__)
     ".weak _start\n"
+#endif
     ".global _start\n"
     "_start:\n"
     "pop %eax\n"                // argc   (first arg, %eax)
diff --git a/tools/include/nolibc/arch-mips.h b/tools/include/nolibc/arch-mips.h
index c9a6aac87c6d..719d3808614d 100644
--- a/tools/include/nolibc/arch-mips.h
+++ b/tools/include/nolibc/arch-mips.h
@@ -190,7 +190,9 @@ struct sys_stat_struct {
 
 /* startup code, note that it's called __start on MIPS */
 asm(".section .text\n"
+#if !defined(__clang__)
     ".weak __start\n"
+#endif
     ".set nomips16\n"
     ".global __start\n"
     ".set    noreorder\n"
diff --git a/tools/include/nolibc/arch-riscv.h b/tools/include/nolibc/arch-riscv.h
index bc10b7b5706d..a9704affd7de 100644
--- a/tools/include/nolibc/arch-riscv.h
+++ b/tools/include/nolibc/arch-riscv.h
@@ -184,7 +184,9 @@ struct sys_stat_struct {
 
 /* startup code */
 asm(".section .text\n"
+#if !defined(__clang__)
     ".weak _start\n"
+#endif
     ".global _start\n"
     "_start:\n"
     ".option push\n"
diff --git a/tools/include/nolibc/arch-x86_64.h b/tools/include/nolibc/arch-x86_64.h
index a7b70ea51b68..f453f1a05a48 100644
--- a/tools/include/nolibc/arch-x86_64.h
+++ b/tools/include/nolibc/arch-x86_64.h
@@ -198,7 +198,9 @@ struct sys_stat_struct {
  *
  */
 asm(".section .text\n"
+#if !defined(__clang__)
     ".weak _start\n"
+#endif
     ".global _start\n"
     "_start:\n"
     "pop %rdi\n"                // argc   (first arg, %rdi)
-- 
Ammar Faizi


  parent reply	other threads:[~2022-03-20  9:38 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-20  9:37 [RFC PATCH v1 0/6] Add dynamic memory allocator support for nolibc Ammar Faizi
2022-03-20  9:37 ` [RFC PATCH v1 1/6] tools/nolibc: x86-64: Update System V ABI document link Ammar Faizi
2022-03-20  9:37 ` Ammar Faizi [this message]
2022-03-20 19:16   ` [RFC PATCH v1 2/6] tools/nolibc: Make the entry point not weak for clang Willy Tarreau
2022-03-21 11:38     ` Ammar Faizi
2022-03-21 17:27       ` Nick Desaulniers
2022-03-20  9:37 ` [RFC PATCH v1 3/6] tools/nolibc: i386: Implement syscall with 6 arguments Ammar Faizi
2022-03-20 10:33   ` Alviro Iskandar Setiawan
2022-03-20 10:42     ` Alviro Iskandar Setiawan
2022-03-20 15:09       ` Ammar Faizi
2022-03-20 13:10   ` David Laight
2022-03-20 14:01     ` Willy Tarreau
2022-03-20 15:04     ` Ammar Faizi
2022-03-20 18:22       ` David Laight
2022-03-20  9:37 ` [RFC PATCH v1 4/6] tools/nolibc/sys: Implement `mmap()` and `munmap()` Ammar Faizi
2022-03-20  9:37 ` [RFC PATCH v1 5/6] tools/nolibc/stdlib: Implement `malloc()`, `calloc()`, `realloc()` and `free()` Ammar Faizi
2022-03-20 15:50   ` Alviro Iskandar Setiawan
2022-03-20 16:10     ` Ammar Faizi
2022-03-20 16:16   ` Willy Tarreau
2022-03-20 16:36     ` Ammar Faizi
2022-03-20 16:46       ` Willy Tarreau
2022-03-20  9:37 ` [RFC PATCH v1 6/6] tools/include/string: Implement `strdup()` and `strndup()` Ammar Faizi
2022-03-20 15:55   ` Alviro Iskandar Setiawan
2022-03-20 16:10     ` Ammar Faizi
2022-03-21  7:53   ` Willy Tarreau
2022-03-21  8:16     ` Alviro Iskandar Setiawan
2022-03-21  8:51       ` Willy Tarreau
2022-03-21 11:36     ` Ammar Faizi
2022-03-21 11:43       ` Willy Tarreau

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