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From d3fbf09787b9dd8a061b541cd931ffbf63e4d610 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 12 Jan 2022 10:48:36 -0800
Subject: [PATCH] apply const trick to ptr_to_globals
This was missing in the previous attempt to fix it via [1]
This helps fix segfaults when compiling with clang ( seen on riscv64 )
[ 452.428349] less[270]: unhandled signal 11 code 0x1 at 0x000000000000000c in busybox.nosuid[2ab7491000+ba000]
[ 452.430246] CPU: 3 PID: 270 Comm: less Not tainted 5.15.13-yocto-standard #1
[ 452.431323] Hardware name: riscv-virtio,qemu (DT)
[ 452.431925] epc : 0000002ab74a19ee ra : 0000002ab74a19dc sp : 0000003fec6ec980
[ 452.432725] gp : 0000002ab754dcb0 tp : 0000003f88783800 t0 : 0000003f8878d4a0
[ 452.433744] t1 : 0000002ab749b00c t2 : 0000000000000000 s0 : 0000003fec6ecc38
[ 452.434732] s1 : 000000000000004c a0 : 00000000ffffffff a1 : 0000002ab754dde0
[ 452.435861] a2 : 0000000000000000 a3 : 0000000000000100 a4 : 0000002ab754f3a0
[ 452.436787] a5 : 0000002ab754f3a0 a6 : 0000000000000000 a7 : 0000002ab754f2a0
[ 452.437974] s2 : 0000000000000002 s3 : 0000002ab754b6c8 s4 : 0000002ab749b60e
[ 452.438781] s5 : 0000000000000000 s6 : 0000002ab754b6c8 s7 : 0000003f88943060
[ 452.439723] s8 : 0000003f88944050 s9 : 0000002ad8502e88 s10: 0000002ad8502de8
[ 452.440538] s11: 0000000000000014 t3 : 0000003f887fceb6 t4 : 0000003f8893af0c
[ 452.441438] t5 : 0000000000000000 t6 : 0000003f88923000
[1] https://git.busybox.net/busybox/commit/?id=1f925038a
Upstream-Status: Submitted [http://lists.busybox.net/pipermail/busybox/2022-January/089413.html]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
include/libbb.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/libbb.h b/include/libbb.h
index a487828..7b76335 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -2281,7 +2281,7 @@ struct globals;
/* '*const' ptr makes gcc optimize code much better.
* Magic prevents ptr_to_globals from going into rodata.
* If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
-extern struct globals *const ptr_to_globals;
+extern struct globals *BB_GLOBAL_CONST ptr_to_globals;
#define barrier() asm volatile ("":::"memory")
--
2.34.1
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