[PATCH v2] ARC: update definitions in elf/elf.h

[Shahab Vahedi via Libc-alpha <libc-alpha@sourceware.org>]

While porting ARCv2 to elfutils [1], it was brought up that the
necessary changes to the project's libelf/elf.h must come from
glibc, because they sync it from glibc [2].  Therefore, this patch
is to update ARC entries in elf/elf.h.

The majority of the update is about adding new definitions,
specially for the relocations.  However, there is one rename, one
deletion, and one change:

- R_ARC_JUMP_SLOT renamed to R_ARC_JMP_SLOT to match binutils.
- R_ARC_B26 removed because it is unused and deprecated.
- R_ARC_TLS_DTPOFF_S9 changed from 0x4a to the correct value 0x49.

[1]
https://sourceware.org/pipermail/elfutils-devel/2022q4/005530.html

[2]
https://sourceware.org/pipermail/elfutils-devel/2022q4/005548.html

Signed-off-by: Shahab Vahedi <shahab@synopsys.com>
---
Chagelog:
v2:
  - Rename instances of R_ARC_JUMP_SLOT to R_ARC_JMP_SLOT.
  - Remove an unnecessary extra empty line introduced in elf/elf.h.

 elf/elf.h                | 29 ++++++++++++++++++++++++-----
 sysdeps/arc/dl-machine.h |  8 ++++----
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/elf/elf.h b/elf/elf.h
index 920e6891e6..da41bad34b 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -4159,6 +4159,15 @@ enum
 #define R_LARCH_GNU_VTINHERIT  57
 #define R_LARCH_GNU_VTENTRY  58
 
+/* ARC specific declarations.  */
+
+/* Processor specific flags for the Ehdr e_flags field.  */
+#define EF_ARC_MACH_MSK	    0x000000ff
+#define EF_ARC_OSABI_MSK    0x00000f00
+#define EF_ARC_ALL_MSK	    (EF_ARC_MACH_MSK | EF_ARC_OSABI_MSK)
+
+/* Processor specific values for the Shdr sh_type field.  */
+#define SHT_ARC_ATTRIBUTES	(SHT_LOPROC + 1) /* ARC attributes section.  */
 
 /* ARCompact/ARCv2 specific relocs.  */
 #define R_ARC_NONE		0x0
@@ -4166,7 +4175,7 @@ enum
 #define R_ARC_16		0x2
 #define R_ARC_24		0x3
 #define R_ARC_32		0x4
-#define R_ARC_B26		0x5
+
 #define R_ARC_B22_PCREL		0x6
 #define R_ARC_H30		0x7
 #define R_ARC_N8		0x8
@@ -4206,16 +4215,23 @@ enum
 #define R_ARC_SECTOFF_ME_2	0x2A
 #define R_ARC_SECTOFF_1		0x2B
 #define R_ARC_SECTOFF_2		0x2C
+#define R_ARC_SDA_12		0x2D
+#define R_ARC_SDA16_ST2		0x30
+#define R_ARC_32_PCREL		0x31
 #define R_ARC_PC32		0x32
 #define R_ARC_GOTPC32		0x33
 #define R_ARC_PLT32		0x34
 #define R_ARC_COPY		0x35
 #define R_ARC_GLOB_DAT		0x36
-#define R_ARC_JUMP_SLOT		0x37
+#define R_ARC_JMP_SLOT		0x37
 #define R_ARC_RELATIVE		0x38
 #define R_ARC_GOTOFF		0x39
 #define R_ARC_GOTPC		0x3A
 #define R_ARC_GOT32		0x3B
+#define R_ARC_S21W_PCREL_PLT	0x3C
+#define R_ARC_S25H_PCREL_PLT	0x3D
+
+#define R_ARC_JLI_SECTOFF	0x3F
 
 #define R_ARC_TLS_DTPMOD	0x42
 #define R_ARC_TLS_DTPOFF	0x43
@@ -4224,9 +4240,12 @@ enum
 #define R_ARC_TLS_GD_LD	        0x46
 #define R_ARC_TLS_GD_CALL	0x47
 #define R_ARC_TLS_IE_GOT	0x48
-#define R_ARC_TLS_DTPOFF_S9	0x4a
-#define R_ARC_TLS_LE_S9		0x4a
-#define R_ARC_TLS_LE_32		0x4b
+#define R_ARC_TLS_DTPOFF_S9	0x49
+#define R_ARC_TLS_LE_S9		0x4A
+#define R_ARC_TLS_LE_32		0x4B
+#define R_ARC_S25W_PCREL_PLT	0x4C
+#define R_ARC_S21H_PCREL_PLT	0x4D
+#define R_ARC_NPS_CMEM16	0x4E
 
 /* OpenRISC 1000 specific relocs.  */
 #define R_OR1K_NONE		0
diff --git a/sysdeps/arc/dl-machine.h b/sysdeps/arc/dl-machine.h
index c6ad232384..8420cd0006 100644
--- a/sysdeps/arc/dl-machine.h
+++ b/sysdeps/arc/dl-machine.h
@@ -183,14 +183,14 @@ __start:								\n\
    ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
    of the main executable's symbols, as for a COPY reloc.  */
 #define elf_machine_type_class(type)				\
-  ((((type) == R_ARC_JUMP_SLOT					\
+  ((((type) == R_ARC_JMP_SLOT					\
      || (type) == R_ARC_TLS_DTPMOD				\
      || (type) == R_ARC_TLS_DTPOFF				\
      || (type) == R_ARC_TLS_TPOFF) * ELF_RTYPE_CLASS_PLT)	\
    | (((type) == R_ARC_COPY) * ELF_RTYPE_CLASS_COPY))
 
 /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.  */
-#define ELF_MACHINE_JMP_SLOT  R_ARC_JUMP_SLOT
+#define ELF_MACHINE_JMP_SLOT  R_ARC_JMP_SLOT
 
 /* Fixup a PLT entry to bounce directly to the function at VALUE.  */
 
@@ -261,7 +261,7 @@ elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
           break;
 
         case R_ARC_GLOB_DAT:
-        case R_ARC_JUMP_SLOT:
+        case R_ARC_JMP_SLOT:
             *reloc_addr = value;
           break;
 
@@ -321,7 +321,7 @@ elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
   ElfW(Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info);
 
-  if (r_type == R_ARC_JUMP_SLOT)
+  if (r_type == R_ARC_JMP_SLOT)
     *reloc_addr += l_addr;
   else
     _dl_reloc_bad_type (map, r_type, 1);
-- 
2.38.1