[PATCH] elf: clearer error message when ELF machine mismatches

[Cocoa <r.xu.1@research.gla.ac.uk>]

The misleading error message happens when trying to load 64-bit/32-bit
elf file but on a different machine(architecture). For example,
load an aarch64 elf file on a x86_64 host will give the error message
"No such file or directory" while the file exists.

Lastly, sorry that I am not a native English speaker, therefore,
please let me know if the error message needs to be phrased better, or
please suggest a proper one.

Many thanks.

>8

Set the error message to "ELF file machine does not match the host"
if elf machine does not match the host. The previous code jumps
to close_and_out and set errno to ENOENT, which results in a
misleading error message, "No such file or directory", while the
file acutally exists.
---
 elf/dl-load.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/elf/dl-load.c b/elf/dl-load.c
index 12744caf..818a15e1 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -1729,7 +1729,10 @@ open_verify (const char *name, int fd,
 	  goto lose;
 	}
       if (! __glibc_likely (elf_machine_matches_host (ehdr)))
-	goto close_and_out;
+        {
+          errstring = N_("ELF file machine does not match the host");
+          goto lose;
+        }
       else if (__glibc_unlikely (ehdr->e_type != ET_DYN
 				 && ehdr->e_type != ET_EXEC))
 	{
-- 
2.30.1 (Apple Git-130)