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Add missing parameter to 'amd64_create_target_description' (and unbreak build) 

While building gdbserver on GNU/Linux, the build failed with:

  ../../../binutils-gdb/gdb/gdbserver/linux-x86-tdesc.c: In function ‘const target_desc* amd64_linux_read_description(uint64_t, bool)’:
  ../../../binutils-gdb/gdb/gdbserver/linux-x86-tdesc.c:121:67: error: too few arguments to function ‘target_desc* amd64_create_target_description(uint64_t, bool, bool, bool)’
         *tdesc = amd64_create_target_description (xcr0, is_x32, true);
                                                                     ^
  In file included from ../../../binutils-gdb/gdb/gdbserver/linux-x86-tdesc.c:26:0:
  ../../../binutils-gdb/gdb/gdbserver/../arch/amd64.h:21:14: note: declared here
   target_desc *amd64_create_target_description (uint64_t xcr0, bool is_x32,
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

According to Joel Brobecker:

> I think the parameter should be set to "true". Otherwise, it will
> not include the fs_base and gs_base register in the list of registers.
> Although the name of the source file says x86, the code itself is
> protected by...
>
>     #ifdef __x86_64__
>
> ... and is inside a function called amd64_linux_read_description.
> I also verified that this file gets compiled on amd64-linux platforms.
> See gdb/gdbserver/configure.srv:
>
>   x86_64-*-linux*)      srv_regobj="$srv_amd64_linux_regobj $srv_i386_linux_regobj"
>
> The last piece of confirmation is that setting the parameter to "true"
> provides the behavior before the parameter was added; and the reason
> for adding the parameter was to remove the {fs,gs}_base registers
> from the list for Windows only.

Therefore I'm pushing the patch to unbreak the build.

gdb/gdbserver/ChangeLog:
2018-06-29  Joel Brobecker  <brobecker@adacore.com>

	* linux-x86-tdesc.c (amd64_linux_read_description): Add missing
	parameter in call to 'amd64_create_target_description'.
This commit is contained in:
Sergio Durigan Junior 2018-06-29 21:36:42 -04:00
parent 6d3c495640
commit c0867626d2
2 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,8 @@
2018-06-29 Joel Brobecker <brobecker@adacore.com>
* linux-x86-tdesc.c (amd64_linux_read_description): Add missing
parameter in call to 'amd64_create_target_description'.
2018-06-28 Jan Kratochvil <jan.kratochvil@redhat.com>
* x86-tdesc.h: Remove executable permission flag.

2
gdb/gdbserver/linux-x86-tdesc.c
View File

@ -118,7 +118,7 @@ amd64_linux_read_description (uint64_t xcr0, bool is_x32)
if (*tdesc == NULL)
{
*tdesc = amd64_create_target_description (xcr0, is_x32, true);
*tdesc = amd64_create_target_description (xcr0, is_x32, true, true);
init_target_desc (*tdesc, amd64_expedite_regs);
}