https://sourceware.org/bugzilla/show_bug.cgi?id=17505
Bug ID: 17505
Summary: arm: bad static label resolution from different modes
Product: binutils
Version: 2.24
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: chrbr at gcc dot gnu.org
Created attachment 7843
--> https://sourceware.org/bugzilla/attachment.cgi?id=7843&action=edit
test to reproduce
While working on the attribute_target GCC attribute, I find myself calling a
static THUMB function while in ARM mode, or vice versa.
(this works fine when functions are .global)
Using the attached .s example, with
foo:
.thumb_func
.type bar, %function
the relocations are in the object
00000000 <main>:
00000000 <main>:
0: ebfffffe bl 0 <main>
0: R_ARM_CALL foo
4: ebfffffe bl 0 <main>
4: R_ARM_CALL bar
is resolved in the final binary as:
Disassembly of section .text:
00008018 <main>:
8018: eb000085 bl 8234 <bar>
801c: fa000084 blx 8234 <bar>
instead of bl <foo>
What is surprising is that the linker correctly patches the BL/BLX
instructions, itś just the address that is wrong. I´m wondering i
f this can be
fixed in the linker machinery to handle interwork or have the assembly emit
a
R_ARM_THM_CALL reloc
assembled/linked with :
arm-none-eabi-gcc 1.s -o 1.u
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