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    Subject[PATCH 33/42] tools/nolibc/arch: mark the _start symbol as weak
    Date
    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
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