https://sourceware.org/bugzilla/show_bug.cgi?id=23078
Bug ID: 23078
Summary: Weak alias to a weak symbol is not resolved correctly.
Product: binutils
Version: 2.29
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: pftbest at gmail dot com
Target Milestone: ---
Created attachment 10957
--> https://sourceware.org/bugzilla/attachment.cgi?id=10957&action=edit
Archive with code to reproduce this issue.
Example code
// main.c -------------------
void _start() {}
void DEFAULT_HANDLER() {
*((int*)0x10) = 5;
}
// foo.c --------------------
__attribute__((weak)) void DEFAULT_HANDLER() {
*((int*)0x10) = 1;
}
__attribute__((weak, alias("DEFAULT_HANDLER"))) void HARD_FAULT();
__attribute__((weak, alias("DEFAULT_HANDLER"))) void BUS_FAULT();
void (*VECTORS[])() = {
HARD_FAULT,
BUS_FAULT,
};
// compile with ---------------
gcc -Os -o main.o -c main.c
gcc -Os -o foo.o -c foo.c
ld main.o foo.o
objdump -d -j .text -j .data a.out > dump.txt
// ----------------
VECTORS array points to a weak function instead of a strong function defined in
main.c
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