From: Willy Tarreau <w@1wt.eu>
To: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Mark Brown <broonie@kernel.org>,
linux-kernel@vger.kernel.org, Willy Tarreau <w@1wt.eu>
Subject: [PATCH 33/42] tools/nolibc/arch: mark the _start symbol as weak
Date: Mon, 7 Feb 2022 17:23:45 +0100 [thread overview]
Message-ID: <20220207162354.14293-34-w@1wt.eu> (raw)
In-Reply-To: <20220207162354.14293-1-w@1wt.eu>
By doing so we can link together multiple C files that have been compiled
with nolibc and which each have a _start symbol.
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
tools/include/nolibc/arch-aarch64.h | 1 +
tools/include/nolibc/arch-arm.h | 1 +
tools/include/nolibc/arch-i386.h | 1 +
tools/include/nolibc/arch-mips.h | 1 +
tools/include/nolibc/arch-riscv.h | 1 +
tools/include/nolibc/arch-x86_64.h | 1 +
6 files changed, 6 insertions(+)
diff --git a/tools/include/nolibc/arch-aarch64.h b/tools/include/nolibc/arch-aarch64.h
index 443de5fb7f54..87d9e434820c 100644
--- a/tools/include/nolibc/arch-aarch64.h
+++ b/tools/include/nolibc/arch-aarch64.h
@@ -183,6 +183,7 @@ struct sys_stat_struct {
/* startup code */
asm(".section .text\n"
+ ".weak _start\n"
".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 66f687ad987f..001a3c8c9ad5 100644
--- a/tools/include/nolibc/arch-arm.h
+++ b/tools/include/nolibc/arch-arm.h
@@ -176,6 +176,7 @@ struct sys_stat_struct {
/* startup code */
asm(".section .text\n"
+ ".weak _start\n"
".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 32f42e2cee26..d7e4d53325a3 100644
--- a/tools/include/nolibc/arch-i386.h
+++ b/tools/include/nolibc/arch-i386.h
@@ -175,6 +175,7 @@ struct sys_stat_struct {
*
*/
asm(".section .text\n"
+ ".weak _start\n"
".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 e330201dde6a..c9a6aac87c6d 100644
--- a/tools/include/nolibc/arch-mips.h
+++ b/tools/include/nolibc/arch-mips.h
@@ -190,6 +190,7 @@ struct sys_stat_struct {
/* startup code, note that it's called __start on MIPS */
asm(".section .text\n"
+ ".weak __start\n"
".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 9d5ff78f606b..bc10b7b5706d 100644
--- a/tools/include/nolibc/arch-riscv.h
+++ b/tools/include/nolibc/arch-riscv.h
@@ -184,6 +184,7 @@ struct sys_stat_struct {
/* startup code */
asm(".section .text\n"
+ ".weak _start\n"
".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 83c4b458ada7..fe517c16cd4d 100644
--- a/tools/include/nolibc/arch-x86_64.h
+++ b/tools/include/nolibc/arch-x86_64.h
@@ -198,6 +198,7 @@ struct sys_stat_struct {
*
*/
asm(".section .text\n"
+ ".weak _start\n"
".global _start\n"
"_start:\n"
"pop %rdi\n" // argc (first arg, %rdi)
--
2.35.1
next prev parent reply other threads:[~2022-02-07 16:45 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-07 16:23 [PATCH 00/42] nolibc: update to resync with out-of-tree project Willy Tarreau
2022-02-07 16:23 ` [PATCH 01/42] tools/nolibc: use pselect6 on RISCV Willy Tarreau
2022-02-07 16:23 ` [PATCH 02/42] tools/nolibc: guard the main file against multiple inclusion Willy Tarreau
2022-02-07 16:23 ` [PATCH 03/42] tools/nolibc/std: move the standard type definitions to std.h Willy Tarreau
2022-02-07 16:23 ` [PATCH 04/42] tools/nolibc/types: split syscall-specific definitions into their own files Willy Tarreau
2022-02-07 16:23 ` [PATCH 05/42] tools/nolibc/arch: split arch-specific code into individual files Willy Tarreau
2022-02-07 16:23 ` [PATCH 06/42] tools/nolibc/sys: split the syscall definitions into their own file Willy Tarreau
2022-02-07 16:23 ` [PATCH 07/42] tools/nolibc/stdlib: extract the stdlib-specific functions to " Willy Tarreau
2022-02-07 16:23 ` [PATCH 08/42] tools/nolibc/string: split the string functions into string.h Willy Tarreau
2022-02-07 16:23 ` [PATCH 09/42] tools/nolibc/ctype: split the is* functions to ctype.h Willy Tarreau
2022-02-07 16:23 ` [PATCH 10/42] tools/nolibc/ctype: add the missing is* functions Willy Tarreau
2022-02-07 16:23 ` [PATCH 11/42] tools/nolibc/types: move the FD_* functions to macros in types.h Willy Tarreau
2022-02-07 17:05 ` David Laight
2022-02-08 5:14 ` Willy Tarreau
2022-02-13 8:52 ` [PATCH v2 " Willy Tarreau
2022-02-07 16:23 ` [PATCH 12/42] tools/nolibc/types: make FD_SETSIZE configurable Willy Tarreau
2022-02-13 8:53 ` [PATCH v2 " Willy Tarreau
2022-02-14 20:17 ` Paul E. McKenney
2022-02-07 16:23 ` [PATCH 13/42] tools/nolibc/types: move makedev to types.h and make it a macro Willy Tarreau
2022-02-07 16:23 ` [PATCH 14/42] tools/nolibc/stdlib: move ltoa() to stdlib.h Willy Tarreau
2022-02-07 16:23 ` [PATCH 15/42] tools/nolibc/stdlib: replace the ltoa() function with more efficient ones Willy Tarreau
2022-02-07 16:23 ` [PATCH 16/42] tools/nolibc/stdlib: add i64toa() and u64toa() Willy Tarreau
2022-02-07 16:23 ` [PATCH 17/42] tools/nolibc/stdlib: add utoh() and u64toh() Willy Tarreau
2022-02-07 16:23 ` [PATCH 18/42] tools/nolibc/stdio: add a minimal set of stdio functions Willy Tarreau
2022-02-07 16:23 ` [PATCH 19/42] tools/nolibc/stdio: add stdin/stdout/stderr and fget*/fput* functions Willy Tarreau
2022-02-07 16:23 ` [PATCH 20/42] tools/nolibc/stdio: add fwrite() to stdio Willy Tarreau
2022-02-07 16:23 ` [PATCH 21/42] tools/nolibc/stdio: add a minimal [vf]printf() implementation Willy Tarreau
2022-02-07 16:23 ` [PATCH 22/42] tools/nolibc/types: define EXIT_SUCCESS and EXIT_FAILURE Willy Tarreau
2022-02-07 16:23 ` [PATCH 23/42] tools/nolibc/stdio: add perror() to report the errno value Willy Tarreau
2022-02-07 16:23 ` [PATCH 24/42] tools/nolibc/sys: make open() take a vararg on the 3rd argument Willy Tarreau
2022-02-07 16:23 ` [PATCH 25/42] tools/nolibc/stdlib: avoid a 64-bit shift in u64toh_r() Willy Tarreau
2022-02-07 16:23 ` [PATCH 26/42] tools/nolibc/stdlib: make raise() use the lower level syscalls only Willy Tarreau
2022-02-07 16:23 ` [PATCH 27/42] tools/nolibc/sys: make getpgrp(), getpid(), gettid() not set errno Willy Tarreau
2022-02-07 16:23 ` [PATCH 28/42] tools/nolibc/string: use unidirectional variants for memcpy() Willy Tarreau
2022-02-07 16:23 ` [PATCH 29/42] tools/nolibc/string: slightly simplify memmove() Willy Tarreau
2022-02-07 16:23 ` [PATCH 30/42] tools/nolibc/string: add strncpy() and strlcpy() Willy Tarreau
2022-02-07 16:23 ` [PATCH 31/42] tools/nolibc/string: add tiny versions of strncat() and strlcat() Willy Tarreau
2022-02-07 16:23 ` [PATCH 32/42] tools/nolibc: move exported functions to their own section Willy Tarreau
2022-02-07 16:23 ` Willy Tarreau [this message]
2022-02-07 16:23 ` [PATCH 34/42] tools/nolibc/types: define PATH_MAX and MAXPATHLEN Willy Tarreau
2022-02-07 16:23 ` [PATCH 35/42] tools/nolibc/string: export memset() and memmove() Willy Tarreau
2022-02-07 16:23 ` [PATCH 36/42] tools/nolibc/errno: extract errno.h from sys.h Willy Tarreau
2022-02-07 16:23 ` [PATCH 37/42] tools/nolibc/unistd: extract msleep(), sleep(), tcsetpgrp() to unistd.h Willy Tarreau
2022-02-07 16:23 ` [PATCH 38/42] tools/nolibc/unistd: add usleep() Willy Tarreau
2022-02-07 16:23 ` [PATCH 39/42] tools/nolibc/signal: move raise() to signal.h Willy Tarreau
2022-02-07 16:23 ` [PATCH 40/42] tools/nolibc/time: create time.h with time() Willy Tarreau
2022-02-07 16:23 ` [PATCH 41/42] tools/nolibc: also mention how to build by just setting the include path Willy Tarreau
2022-02-07 16:23 ` [PATCH 42/42] tools/nolibc/stdlib: implement abort() Willy Tarreau
2022-02-08 0:00 ` [PATCH 00/42] nolibc: update to resync with out-of-tree project Paul E. McKenney
2022-02-08 4:41 ` Willy Tarreau
2022-02-08 5:10 ` Paul E. McKenney
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