ARC: module: print pretty section names

Now that we have referece to section name string table in
apply_relocate_add(), use it to

 - print the name of section being relocated
 - print symbol with NULL name (since it refers to a section)

before

| Section to fixup 7000a060
| =========================================================
| rela->r_off | rela->addend | sym->st_value | ADDR | VALUE
| =========================================================
|	1c		0		7000e000  7000a07c 7000e000 []
|	40		0		7000a000  7000a0a0 7000a000 []

after

| Section to fixup .eh_frame @7000a060
| =========================================================
| r_off	r_add	st_value ADDRESS  VALUE
| =========================================================
|    1c	0	7000e000 7000a07c 7000e000 [.init.text]
|    40	0	7000a000 7000a0a0 7000a000 [.exit.text]

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 21 insertions, 14 deletions

diff --git a/arch/arc/kernel/module.c b/arch/arc/kernel/module.c
index 24bd2ffb90b7..42e964db2967 100644
--- a/arch/arc/kernel/module.c
+++ b/arch/arc/kernel/module.c
@@ -51,31 +51,33 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
                        unsigned int relsec,     /* sec index for relo sec */
                        struct module *module)
 {
-        int i, n;
+        int i, n, relo_type;
         Elf32_Rela *rel_entry = (void *)sechdrs[relsec].sh_addr;
         Elf32_Sym *sym_entry, *sym_sec;
-        Elf32_Addr relocation;
-        Elf32_Addr location;
-        Elf32_Addr sec_to_patch;
-        int relo_type;
+        Elf32_Addr relocation, location, tgt_addr;
         unsigned int tgtsec;
 
+        /*
+         * @relsec has relocations e.g. .rela.init.text
+         * @tgtsec is section to patch e.g. .init.text
+         */
         tgtsec = sechdrs[relsec].sh_info;
-        sec_to_patch = sechdrs[tgtsec].sh_addr;
+        tgt_addr = sechdrs[tgtsec].sh_addr;
         sym_sec = (Elf32_Sym *) sechdrs[symindex].sh_addr;
         n = sechdrs[relsec].sh_size / sizeof(*rel_entry);
 
-        pr_debug("\n========== Module Sym reloc ===========================\n");
-        pr_debug("Section to fixup %x\n", sec_to_patch);
+        pr_debug("\nSection to fixup %s @%x\n",
+                 module->arch.secstr + sechdrs[tgtsec].sh_name, tgt_addr);
         pr_debug("=========================================================\n");
-        pr_debug("rela->r_off | rela->addend | sym->st_value | ADDR | VALUE\n");
+        pr_debug("r_off\tr_add\tst_value ADDRESS  VALUE\n");
         pr_debug("=========================================================\n");
 
         /* Loop thru entries in relocation section */
         for (i = 0; i < n; i++) {
+                const char *s;
 
                 /* This is where to make the change */
-                location = sec_to_patch + rel_entry[i].r_offset;
+                location = tgt_addr + rel_entry[i].r_offset;
 
                 /* This is the symbol it is referring to.  Note that all
                    undefined symbols have been resolved.  */
@@ -83,10 +85,15 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
 
                 relocation = sym_entry->st_value + rel_entry[i].r_addend;
 
-                pr_debug("\t%x\t\t%x\t\t%x  %x %x [%s]\n",
-                        rel_entry[i].r_offset, rel_entry[i].r_addend,
-                        sym_entry->st_value, location, relocation,
-                        strtab + sym_entry->st_name);
+                if (sym_entry->st_name == 0 && ELF_ST_TYPE (sym_entry->st_info) == STT_SECTION) {
+                        s = module->arch.secstr + sechdrs[sym_entry->st_shndx].sh_name;
+                } else {
+                        s = strtab + sym_entry->st_name;
+                }
+
+                pr_debug("   %x\t%x\t%x %x %x [%s]\n",
+                         rel_entry[i].r_offset, rel_entry[i].r_addend,
+                         sym_entry->st_value, location, relocation, s);
 
                 /* This assumes modules are built with -mlong-calls
                  * so any branches/jumps are absolute 32 bit jmps