From: David McCullough <davidm@snapgear.com>
Date: Thu, 7 May 2009 06:23:02 +0000 (+0000)
Subject: update Blackfin port
X-Git-Url: https://git.wh0rd.org/?a=commitdiff_plain;h=dd47f2d916197375106127fb44c9996e3a62a647;p=elf2flt.git
update Blackfin port
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
diff --git a/elf2flt.c b/elf2flt.c
index 889ea98..9b1ea37 100644
--- a/elf2flt.c
+++ b/elf2flt.c
@@ -102,13 +102,6 @@
#define ARCH "e1-coff"
#elif defined(TARGET_bfin)
#define ARCH "bfin"
-#define FLAT_RELOC_TYPE_TEXT 0
-#define FLAT_RELOC_TYPE_DATA 1
-#define FLAT_RELOC_TYPE_BSS 2
-#define FLAT_RELOC_TYPE_STACK 3
-#define FLAT_RELOC_PART_LO 0
-#define FLAT_RELOC_PART_HI 1
-#define PCREL24_MAGIC_OFFSET -1
#elif defined(TARGET_nios)
#define ARCH "nios"
#elif defined(TARGET_nios2)
@@ -152,6 +145,9 @@ int use_resolved = 0; /* If true, get the value of symbol references from */
/* versions of GNU ld will give you a fully resolved */
/* output file with relocation entries). */
+/* Set if the text section contains any relocations. If it does, we must
+ set the load_to_ram flag. */
+int text_has_relocs = 0;
const char *progname, *filename;
int lineno;
@@ -335,51 +331,52 @@ weak_und_symbol(const char *reloc_section_name,
}
static int
-bfin_set_reloc (uint32_t *reloc,
- const char *reloc_section_name,
+bfin_set_reloc (uint32_t *reloc,
+ const char *reloc_section_name,
const char *sym_name,
struct bfd_symbol *symbol,
- int sp, int hilo, int32_t offset)
+ int sp, int32_t offset)
{
- unsigned int type;
+ unsigned int type = 0;
uint32_t val;
- if (strstr (reloc_section_name, "text"))
- type = FLAT_RELOC_TYPE_TEXT;
- else if (strstr (reloc_section_name, "data"))
- type = FLAT_RELOC_TYPE_DATA;
- else if (strstr (reloc_section_name, "bss"))
- type = FLAT_RELOC_TYPE_BSS;
- else if (strstr (reloc_section_name, "stack"))
- type = FLAT_RELOC_TYPE_STACK;
- else if (symbol->flags & BSF_WEAK){
- /* weak symbol support ... if a weak symbol is undefined at the
- end of a final link, it should return 0 rather than error
- We will assume text section for the moment.
- */
- type = FLAT_RELOC_TYPE_TEXT;
- } else if (strstr (reloc_section_name, "*ABS*")){
- /* (A data section initialization of something in the shared libc's text section
- does not resolve - i.e. a global pointer to function initialized with
- a libc function).
- The text section here is appropriate as the section information
- of the shared library is lost. The loader will do some calcs.
- */
- type = FLAT_RELOC_TYPE_TEXT;
- } else {
- printf ("Unknown Type - relocation for %s in bad section - %s\n", sym_name, reloc_section_name);
- return 1;
+ if (strstr (reloc_section_name, "stack")) {
+ if (verbose)
+ printf ("Stack-relative reloc, offset %08lx\n", offset);
+ /* This must be a stack_start reloc for stack checking. */
+ type = 1;
}
-
- val = (offset & ((1 << 26) - 1)) << 6;
- val |= (sp & (1 << 3) - 1) << 3;
- val |= (hilo & 1) << 2;
- val |= (type & (1 << 2) - 1);
+ val = (offset & ((1 << 26) - 1));
+ val |= (sp & (1 << 3) - 1) << 26;
+ val |= type << 29;
*reloc = val;
return 0;
}
-#endif
+static bfd *compare_relocs_bfd;
+
+static int
+compare_relocs (const void *pa, const void *pb)
+{
+ const arelent *const *a = pa, *const *b = pb;
+ const arelent *ra = *a, *rb = *b;
+ unsigned long va, vb;
+ uint32_t a_vma, b_vma;
+
+ if (!ra->sym_ptr_ptr || !*ra->sym_ptr_ptr)
+ return -1;
+ else if (!rb->sym_ptr_ptr || !*rb->sym_ptr_ptr)
+ return 1;
+
+ a_vma = bfd_section_vma(compare_relocs_bfd,
+ (*(ra->sym_ptr_ptr))->section);
+ b_vma = bfd_section_vma(compare_relocs_bfd,
+ (*(rb->sym_ptr_ptr))->section);
+ va = (*(ra->sym_ptr_ptr))->value + a_vma + ra->addend;
+ vb = (*(rb->sym_ptr_ptr))->value + b_vma + rb->addend;
+ return va - vb;
+}
+#endif
uint32_t *
output_relocs (
@@ -406,6 +403,9 @@ output_relocs (
int bad_relocs = 0;
asymbol **symb;
long nsymb;
+#ifdef TARGET_bfin
+ unsigned long persistent_data = 0;
+#endif
#if 0
printf("%s(%d): output_relocs(abs_bfd=%d,synbols=0x%x,number_of_symbols=%d"
@@ -505,6 +505,10 @@ dump_symbols(symbols, number_of_symbols);
__FILE__, __LINE__, r->name);
continue;
} else {
+#ifdef TARGET_bfin
+ compare_relocs_bfd = abs_bfd;
+ qsort (relpp, relcount, sizeof *relpp, compare_relocs);
+#endif
for (p = relpp; (relcount && (*p != NULL)); p++, relcount--) {
unsigned char *r_mem;
int relocation_needed = 0;
@@ -603,7 +607,7 @@ dump_symbols(symbols, number_of_symbols);
* Fixup offset in the actual section.
*/
addstr[0] = 0;
-#ifndef TARGET_e1
+#if !defined TARGET_e1 && !defined TARGET_bfin
if ((sym_addr = get_symbol_offset((char *) sym_name,
sym_section, symbols, number_of_symbols)) == -1) {
sym_addr = 0;
@@ -723,6 +727,76 @@ dump_symbols(symbols, number_of_symbols);
continue;
default:
goto bad_resolved_reloc;
+#elif defined TARGET_bfin
+ case R_rimm16:
+ case R_luimm16:
+ sym_vma = bfd_section_vma(abs_bfd, sym_section);
+ sym_addr += sym_vma + q->addend;
+
+ if (weak_und_symbol(sym_section->name, (*(q->sym_ptr_ptr))))
+ continue;
+ if (q->howto->type == R_rimm16 && (0xFFFF0000 & sym_addr)) {
+ fprintf (stderr, "Relocation overflow for rN = %s\n",sym_name);
+ bad_relocs++;
+ }
+ flat_relocs = (uint32_t *)
+ (realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
+ if (bfin_set_reloc (flat_relocs + flat_reloc_count,
+ sym_section->name, sym_name,
+ (*(q->sym_ptr_ptr)),
+ 0, section_vma + q->address))
+ bad_relocs++;
+ if (a->flags & SEC_CODE)
+ text_has_relocs = 1;
+ flat_reloc_count++;
+ break;
+
+ case R_huimm16:
+ sym_vma = bfd_section_vma(abs_bfd, sym_section);
+ sym_addr += sym_vma + q->addend;
+
+ if (weak_und_symbol (sym_section->name, (*(q->sym_ptr_ptr))))
+ continue;
+
+ flat_relocs = (uint32_t *)
+ (realloc (flat_relocs, (flat_reloc_count + 2) * sizeof (uint32_t)));
+ if ((0xFFFF0000 & sym_addr) != persistent_data) {
+ if (verbose)
+ printf ("New persistent data for %08lx\n", sym_addr);
+ persistent_data = 0xFFFF0000 & sym_addr;
+ flat_relocs[flat_reloc_count++]
+ = (sym_addr >> 16) | (3 << 26);
+ }
+
+ if (bfin_set_reloc (flat_relocs + flat_reloc_count,
+ sym_section->name, sym_name,
+ (*(q->sym_ptr_ptr)),
+ 1, section_vma + q->address))
+ bad_relocs++;
+ if (a->flags & SEC_CODE)
+ text_has_relocs = 1;
+ flat_reloc_count++;
+ break;
+
+ case R_byte4_data:
+ sym_vma = bfd_section_vma(abs_bfd, sym_section);
+ sym_addr += sym_vma + q->addend;
+
+ if (weak_und_symbol (sym_section->name, (*(q->sym_ptr_ptr))))
+ continue;
+
+ flat_relocs = (uint32_t *)
+ (realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
+ if (bfin_set_reloc (flat_relocs + flat_reloc_count,
+ sym_section->name, sym_name,
+ (*(q->sym_ptr_ptr)),
+ 2, section_vma + q->address))
+ bad_relocs++;
+ if (a->flags & SEC_CODE)
+ text_has_relocs = 1;
+
+ flat_reloc_count++;
+ break;
#else
default:
/* The default is to assume that the
@@ -1181,112 +1255,6 @@ NIOS2_RELOC_ERR:
break;
#endif /* TARGET_sparc */
-#ifdef TARGET_bfin
- case R_pcrel12_jump:
- case R_pcrel12_jump_s:
- case R_pcrel24:
- case R_pcrel24_jump_l:
- case R_pcrel24_jump_x:
- case R_pcrel24_call_x:
- case R_pcrel10:
- case R_pcrel11:
- case R_pcrel5m2:
- sym_addr += q->addend;// get the symbol addr
- sym_vma = bfd_section_vma(abs_bfd, sym_section);
- sym_addr -= q->address; // make it PC relative
- // implicitly assumes code section and symbol section are same
- break;
- case R_got:
- /* Ignore these. */
- break;
-
- case R_rimm16:
- sym_addr += q->addend;
- if(weak_und_symbol(sym_section->name, (*(q->sym_ptr_ptr))))
- continue;
- if(0xFFFF0000 & sym_addr){
- fprintf (stderr, "Relocation overflow for rN = %s\n",sym_name);
- bad_relocs++;
- }
- flat_relocs = (uint32_t *)
- (realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
- if (bfin_set_reloc (flat_relocs + flat_reloc_count,
- sym_section->name, sym_name,
- (*(q->sym_ptr_ptr)),
- 0, FLAT_RELOC_PART_LO,
- section_vma + q->address))
- bad_relocs++;
- flat_reloc_count++;
- break;
-
- case R_luimm16:
- case R_huimm16:
- {
- unsigned int sp;
- unsigned int reloc_count_incr;
- unsigned int hi_lo;
-
- if (q->howto->type == R_luimm16)
- hi_lo = FLAT_RELOC_PART_LO;
- else
- hi_lo = FLAT_RELOC_PART_HI;
-
- sym_addr += q->addend;
-
- flat_relocs = (uint32_t *)
- (realloc (flat_relocs, (flat_reloc_count + 2) * sizeof (uint32_t)));
- reloc_count_incr = 1;
- if (weak_und_symbol (sym_section->name, (*(q->sym_ptr_ptr))))
- continue;
- if (0xFFFF0000 & sym_addr) {
- /* value is > 16 bits - use an extra field */
- /* see if we have already output that symbol */
- /* reloc may be addend from symbol and */
- /* we can only store 16 bit offsets */
- sp = 1;
- if ((*(q->sym_ptr_ptr))->udata.i == 0
- || flat_relocs[(*(q->sym_ptr_ptr))->udata.i] != sym_addr
- || ((*(q->sym_ptr_ptr))->udata.i & 0xFFFF0000))
- {
- reloc_count_incr = 2;
- flat_relocs[flat_reloc_count + 1] = sym_addr;
- (*(q->sym_ptr_ptr))->udata.i = flat_reloc_count + 1;
- sym_addr = 0; // indication to loader to read next
- } else{
- sym_addr = (*(q->sym_ptr_ptr))->udata.i;
- }
- } else {
- sp = 0;
- }
-
- if (bfin_set_reloc (flat_relocs + flat_reloc_count,
- sym_section->name, sym_name,
- (*(q->sym_ptr_ptr)),
- sp, hi_lo,
- section_vma + q->address))
- bad_relocs++;
- flat_reloc_count += reloc_count_incr;
- break;
- }
- case R_byte4_data:
- sym_addr += q->addend;
-
- if (weak_und_symbol (sym_section->name, *q->sym_ptr_ptr))
- continue;
-
- flat_relocs = (uint32_t *)
- (realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
- if (bfin_set_reloc (flat_relocs + flat_reloc_count,
- sym_section->name, sym_name,
- (*(q->sym_ptr_ptr)),
- 2, FLAT_RELOC_PART_LO,
- section_vma + q->address))
- bad_relocs++;
-
- flat_reloc_count++;
- break;
-
-#endif //TARGET_bfin
#ifdef TARGET_sh
case R_SH_DIR32:
@@ -1536,48 +1504,6 @@ DIS29_RELOCATION:
*(uint32_t *)r_mem = htonl(hl);
else
*(uint32_t *)r_mem = tmp.l;
-
-#elif defined(TARGET_bfin)
- if ((*p)->howto->type == R_pcrel24
- || (*p)->howto->type == R_pcrel24_jump_l
- || (*p)->howto->type == R_pcrel24_jump_x
- || (*p)->howto->type == R_pcrel24_call_x)
- {
- sym_addr += 2*-1*PCREL24_MAGIC_OFFSET;
- *((unsigned short *)(sectionp + q->address) + 1 + PCREL24_MAGIC_OFFSET)
- = (sym_addr >> 1) & 0xffff;
- *((unsigned short *)(sectionp + q->address) + PCREL24_MAGIC_OFFSET)
- = (0xff00 & *((unsigned short *) (sectionp + q->address) + PCREL24_MAGIC_OFFSET)
- | ((sym_addr >> 17) & 0xff));
- } else if ((*p)->howto->type == R_byte4_data) {
- *((uint32_t *)(sectionp + q->address)) = sym_addr;
- } else if ((*p)->howto->type == R_pcrel12_jump
- || (*p)->howto->type == R_pcrel12_jump_s) {
- *((unsigned short *)(sectionp + q->address))
- = (0xf000 & *((unsigned short *)(sectionp + q->address))
- | ((sym_addr >> 1) & 0xfff));
- } else if ((*p)->howto->type == R_pcrel10) {
- *((unsigned short *)(sectionp + q->address))
- = (~0x3ff & *((unsigned short *)(sectionp + q->address))
- | ((sym_addr >> 1) & 0x3ff));
- } else if ((*p)->howto->type == R_rimm16
- || (*p)->howto->type == R_huimm16
- || (*p)->howto->type == R_luimm16) {
- /* for l and h we set the lower 16 bits which is only when it will be used */
- *((unsigned short *) (sectionp + q->address)) = (unsigned short) sym_addr;
- } else if ((*p)->howto->type == R_pcrel5m2) {
- *((unsigned short *)(sectionp + q->address))
- = (0xfff0 & *((unsigned short *)(sectionp + q->address))
- | ((sym_addr >> 1) & 0xf));
- } else if ((*p)->howto->type == R_pcrel11){
- *((unsigned short *)(sectionp + q->address))
- = (0xfc00 & *((unsigned short *)(sectionp + q->address))
- | ((sym_addr >> 1) & 0x3ff));
- } else if (0xE0 <= (*p)->howto->type && 0xF3 >= (*p)->howto->type) {
- //arith relocs dont generate a real relocation
- } else {
- printf("Blackfin relocation fail for reloc type: 0x%x\n", (*p)->howto->type);
- }
#elif defined(TARGET_e1)
#define OPCODE_SIZE 2 /* Add 2 bytes, counting the opcode size*/
switch ((*p)->howto->type) {
@@ -1604,7 +1530,17 @@ DIS29_RELOCATION:
exit(0);
break;
}
-#else /* ! TARGET_arm && ! TARGET_e1 */
+#elif defined TARGET_bfin
+ if ((*p)->howto->type == R_rimm16
+ || (*p)->howto->type == R_huimm16
+ || (*p)->howto->type == R_luimm16)
+ {
+ /* for l and h we set the lower 16 bits which is only when it will be used */
+ bfd_putl16 (sym_addr, sectionp + q->address);
+ } else if ((*p)->howto->type == R_byte4_data) {
+ bfd_putl32 (sym_addr, sectionp + q->address);
+ }
+#else /* ! TARGET_arm && ! TARGET_e1 && ! TARGET_bfin */
switch (q->howto->type) {
#ifdef TARGET_v850
@@ -1657,19 +1593,6 @@ DIS29_RELOCATION:
#endif /* !TARGET_arm */
}
-#ifdef TARGET_bfin
- else {
- if ((*p)->howto->type == R_rimm16
- || (*p)->howto->type == R_huimm16
- || (*p)->howto->type == R_luimm16)
- {
- /* for l and h we set the lower 16 bits which is only when it will be used */
- *((unsigned short *) (sectionp + q->address)) = (unsigned short) sym_addr;
- } else if ((*p)->howto->type == R_byte4_data) {
- *((uint32_t *)(sectionp + q->address)) = sym_addr;
- }
- }
-#endif
if (verbose)
printf(" RELOC[%d]: offset=0x%x symbol=%s%s "
"section=%s size=%d "
@@ -1718,7 +1641,7 @@ DIS29_RELOCATION:
}
#endif
flat_reloc_count++;
-#endif
+#endif //TARGET_bfin
relocation_needed = 0;
pflags = 0;
}
@@ -2065,7 +1988,7 @@ int main(int argc, char *argv[])
hdr.reloc_start = htonl(sizeof(hdr) + text_offs + text_len +data_len);
hdr.reloc_count = htonl(reloc_len);
hdr.flags = htonl(0
- | (load_to_ram ? FLAT_FLAG_RAM : 0)
+ | (load_to_ram || text_has_relocs ? FLAT_FLAG_RAM : 0)
| (ktrace ? FLAT_FLAG_KTRACE : 0)
| (pic_with_got ? FLAT_FLAG_GOTPIC : 0)
| (docompress ? (docompress == 2 ? FLAT_FLAG_GZDATA : FLAT_FLAG_GZIP) : 0)