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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2023-11-06 17:25:40 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2023-11-21 16:15:42 -0300
commit434eca873f14f618d6c2279b54fb809fb56f2c50 (patch)
tree9894611373fc3fa1e0ba24d89df0b4767beefd19 /stdio-common/Makefile
parent680c597e9c363bc74d1495b08f7a0593a80f8921 (diff)
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elf: Fix _dl_debug_vdprintf to work before self-relocation
The strlen might trigger and invalid GOT entry if it used before
the process is self-relocated (for instance on dl-tunables if any
error occurs).

For i386, _dl_writev with PIE requires to use the old 'int $0x80'
syscall mode because the calling the TLS register (gs) is not yet
initialized.

Checked on x86_64-linux-gnu.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'stdio-common/Makefile')
-rw-r--r--stdio-common/Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/stdio-common/Makefile b/stdio-common/Makefile
index bacb795fed..e88a9cea29 100644
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@@ -460,6 +460,11 @@ CFLAGS-isoc23_scanf.c += -fexceptions
 
 CFLAGS-dprintf.c += $(config-cflags-wno-ignored-attributes)
 
+# Called during static library initialization, so turn stack-protection
+# off for non-shared builds.
+CFLAGS-_itoa.o = $(no-stack-protector)
+CFLAGS-_itoa.op = $(no-stack-protector)
+
 # scanf18.c and scanf19.c test a deprecated extension which is no
 # longer visible under most conformance levels; see the source files
 # for more detail.