[PATCH for-4.15] elfstructs: add relocation defines for i386

[Roger Pau Monne]

Those are need by the rombios relocation code in hvmloader. Fixes the
following build error:

32bitbios_support.c: In function 'relocate_32bitbios':
32bitbios_support.c:130:18: error: 'R_386_PC32' undeclared (first use in this 
function); did you mean 'R_X86_64_PC32'?
             case R_386_PC32:
                  ^~~~~~~~~~
                  R_X86_64_PC32
32bitbios_support.c:130:18: note: each undeclared identifier is reported only 
once for each function it appears in
32bitbios_support.c:134:18: error: 'R_386_32' undeclared (first use in this 
function)
             case R_386_32:
                  ^~~~~~~~

Only add the two defines that are actually used, which seems to match
what we do for amd64.

Fixes: 81b2b328a26c1b ('hvmloader: use Xen private header for elf structs')
Signed-off-by: Roger Pau Monné <roger....@citrix.com>
---
 xen/include/xen/elfstructs.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/include/xen/elfstructs.h b/xen/include/xen/elfstructs.h
index 726ca8f60d..d1054ae380 100644
--- a/xen/include/xen/elfstructs.h
+++ b/xen/include/xen/elfstructs.h
@@ -348,6 +348,9 @@ typedef struct {
 #define ELF32_R_TYPE(i)                ((unsigned char) (i))
 #define ELF32_R_INFO(s,t)      (((s) << 8) + (unsigned char)(t))
 
+#define R_386_32           1            /* Direct 32 bit  */
+#define R_386_PC32         2            /* PC relative 32 bit */
+
 typedef struct {
        Elf64_Addr      r_offset;       /* where to do it */
        Elf64_Xword     r_info;         /* index & type of relocation */
-- 
2.30.1