/* SPU specific support for 32-bit ELF
- Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+ Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
/* Shortcuts to overlay sections. */
asection *ovtab;
+ asection *init;
asection *toe;
asection **ovl_sec;
/* Total number of overlays. */
unsigned int num_overlays;
+ /* For soft icache. */
+ unsigned int line_size_log2;
+ unsigned int num_lines_log2;
+
/* How much memory we have. */
unsigned int local_store;
/* Local store --auto-overlay should reserve for non-overlay
{
struct got_entry *next;
unsigned int ovl;
- bfd_vma addend;
+ union {
+ bfd_vma addend;
+ bfd_vma br_addr;
+ };
bfd_vma stub_addr;
};
unsigned int max_depth;
unsigned int is_tail : 1;
unsigned int is_pasted : 1;
+ unsigned int priority : 13;
};
struct function_info
unsigned int call_count;
/* Address range of (this part of) function. */
bfd_vma lo, hi;
+ /* Offset where we found a store of lr, or -1 if none found. */
+ bfd_vma lr_store;
+ /* Offset where we found the stack adjustment insn. */
+ bfd_vma sp_adjust;
/* Stack usage. */
int stack;
/* Distance from root of call tree. Tail and hot/cold branches
struct function_info fun[1];
};
+static struct function_info *find_function (asection *, bfd_vma,
+ struct bfd_link_info *);
+
/* Create a spu ELF linker hash table. */
static struct bfd_link_hash_table *
{
struct spu_link_hash_table *htab = spu_hash_table (info);
htab->params = params;
+ htab->line_size_log2 = bfd_log2 (htab->params->line_size);
+ htab->num_lines_log2 = bfd_log2 (htab->params->num_lines);
}
/* Find the symbol for the given R_SYMNDX in IBFD and set *HP and *SYMP
unsigned int i, n, ovl_index, num_buf;
asection *s;
bfd_vma ovl_end;
+ const char *ovly_mgr_entry;
if (info->output_bfd->section_count < 2)
return FALSE;
/* Sort them by vma. */
qsort (alloc_sec, n, sizeof (*alloc_sec), sort_sections);
- /* Look for overlapping vmas. Any with overlap must be overlays.
- Count them. Also count the number of overlay regions. */
ovl_end = alloc_sec[0]->vma + alloc_sec[0]->size;
- for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++)
+ if (htab->params->ovly_flavour == ovly_soft_icache)
{
- s = alloc_sec[i];
- if (s->vma < ovl_end)
+ /* Look for an overlapping vma to find the first overlay section. */
+ bfd_vma vma_start = 0;
+ bfd_vma lma_start = 0;
+
+ for (i = 1; i < n; i++)
{
- asection *s0 = alloc_sec[i - 1];
+ s = alloc_sec[i];
+ if (s->vma < ovl_end)
+ {
+ asection *s0 = alloc_sec[i - 1];
+ vma_start = s0->vma;
+ lma_start = s0->lma;
+ ovl_end = (s0->vma
+ + ((bfd_vma) 1
+ << (htab->num_lines_log2 + htab->line_size_log2)));
+ --i;
+ break;
+ }
+ else
+ ovl_end = s->vma + s->size;
+ }
- if (spu_elf_section_data (s0)->u.o.ovl_index == 0)
+ /* Now find any sections within the cache area. */
+ for (ovl_index = 0, num_buf = 0; i < n; i++)
+ {
+ s = alloc_sec[i];
+ if (s->vma >= ovl_end)
+ break;
+
+ /* A section in an overlay area called .ovl.init is not
+ an overlay, in the sense that it might be loaded in
+ by the overlay manager, but rather the initial
+ section contents for the overlay buffer. */
+ if (strncmp (s->name, ".ovl.init", 9) != 0)
{
- alloc_sec[ovl_index] = s0;
- spu_elf_section_data (s0)->u.o.ovl_index = ++ovl_index;
- spu_elf_section_data (s0)->u.o.ovl_buf = ++num_buf;
+ num_buf = ((s->vma - vma_start) >> htab->line_size_log2) + 1;
+ if (((s->vma - vma_start) & (htab->params->line_size - 1))
+ || ((s->lma - lma_start) & (htab->params->line_size - 1)))
+ {
+ info->callbacks->einfo (_("%X%P: overlay section %A "
+ "does not start on a cache line.\n"),
+ s);
+ return FALSE;
+ }
+ else if (s->size > htab->params->line_size)
+ {
+ info->callbacks->einfo (_("%X%P: overlay section %A "
+ "is larger than a cache line.\n"),
+ s);
+ return FALSE;
+ }
+
+ alloc_sec[ovl_index++] = s;
+ spu_elf_section_data (s)->u.o.ovl_index
+ = ((s->lma - lma_start) >> htab->line_size_log2) + 1;
+ spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
}
- alloc_sec[ovl_index] = s;
- spu_elf_section_data (s)->u.o.ovl_index = ++ovl_index;
- spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
- if (s0->vma != s->vma)
+ }
+
+ /* Ensure there are no more overlay sections. */
+ for ( ; i < n; i++)
+ {
+ s = alloc_sec[i];
+ if (s->vma < ovl_end)
{
- info->callbacks->einfo (_("%X%P: overlay sections %A and %A "
- "do not start at the same address.\n"),
- s0, s);
+ info->callbacks->einfo (_("%X%P: overlay section %A "
+ "is not in cache area.\n"),
+ alloc_sec[i-1]);
return FALSE;
}
- if (ovl_end < s->vma + s->size)
+ else
+ ovl_end = s->vma + s->size;
+ }
+ }
+ else
+ {
+ /* Look for overlapping vmas. Any with overlap must be overlays.
+ Count them. Also count the number of overlay regions. */
+ for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++)
+ {
+ s = alloc_sec[i];
+ if (s->vma < ovl_end)
+ {
+ asection *s0 = alloc_sec[i - 1];
+
+ if (spu_elf_section_data (s0)->u.o.ovl_index == 0)
+ {
+ ++num_buf;
+ if (strncmp (s0->name, ".ovl.init", 9) != 0)
+ {
+ alloc_sec[ovl_index] = s0;
+ spu_elf_section_data (s0)->u.o.ovl_index = ++ovl_index;
+ spu_elf_section_data (s0)->u.o.ovl_buf = num_buf;
+ }
+ else
+ ovl_end = s->vma + s->size;
+ }
+ if (strncmp (s->name, ".ovl.init", 9) != 0)
+ {
+ alloc_sec[ovl_index] = s;
+ spu_elf_section_data (s)->u.o.ovl_index = ++ovl_index;
+ spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
+ if (s0->vma != s->vma)
+ {
+ info->callbacks->einfo (_("%X%P: overlay sections %A "
+ "and %A do not start at the "
+ "same address.\n"),
+ s0, s);
+ return FALSE;
+ }
+ if (ovl_end < s->vma + s->size)
+ ovl_end = s->vma + s->size;
+ }
+ }
+ else
ovl_end = s->vma + s->size;
}
- else
- ovl_end = s->vma + s->size;
}
htab->num_overlays = ovl_index;
htab->num_buf = num_buf;
htab->ovl_sec = alloc_sec;
- htab->ovly_load = elf_link_hash_lookup (&htab->elf, "__ovly_load",
+ ovly_mgr_entry = "__ovly_load";
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ ovly_mgr_entry = "__icache_br_handler";
+ htab->ovly_load = elf_link_hash_lookup (&htab->elf, ovly_mgr_entry,
FALSE, FALSE, FALSE);
- htab->ovly_return = elf_link_hash_lookup (&htab->elf, "__ovly_return",
- FALSE, FALSE, FALSE);
+ if (htab->params->ovly_flavour != ovly_soft_icache)
+ htab->ovly_return = elf_link_hash_lookup (&htab->elf, "__ovly_return",
+ FALSE, FALSE, FALSE);
return ovl_index != 0;
}
-#define BRSL 0x33000000
+/* Non-zero to use bra in overlay stubs rather than br. */
+#define BRA_STUBS 0
+
+#define BRA 0x30000000
+#define BRASL 0x31000000
#define BR 0x32000000
+#define BRSL 0x33000000
#define NOP 0x40200000
#define LNOP 0x00200000
#define ILA 0x42000000
enum _stub_type
{
no_stub,
- ovl_stub,
+ call_ovl_stub,
+ br000_ovl_stub,
+ br001_ovl_stub,
+ br010_ovl_stub,
+ br011_ovl_stub,
+ br100_ovl_stub,
+ br101_ovl_stub,
+ br110_ovl_stub,
+ br111_ovl_stub,
nonovl_stub,
stub_error
};
struct spu_link_hash_table *htab = spu_hash_table (info);
enum elf_spu_reloc_type r_type;
unsigned int sym_type;
- bfd_boolean branch;
+ bfd_boolean branch, hint, call;
enum _stub_type ret = no_stub;
+ bfd_byte insn[4];
if (sym_sec == NULL
|| sym_sec->output_section == bfd_abs_section_ptr
makes setjmp/longjmp between overlays work. */
if (strncmp (h->root.root.string, "setjmp", 6) == 0
&& (h->root.root.string[6] == '\0' || h->root.root.string[6] == '@'))
- ret = ovl_stub;
+ ret = call_ovl_stub;
}
- /* Usually, symbols in non-overlay sections don't need stubs. */
- if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index == 0
- && !htab->params->non_overlay_stubs)
- return ret;
-
if (h != NULL)
sym_type = h->type;
else
r_type = ELF32_R_TYPE (irela->r_info);
branch = FALSE;
+ hint = FALSE;
+ call = FALSE;
if (r_type == R_SPU_REL16 || r_type == R_SPU_ADDR16)
{
- bfd_byte insn[4];
-
if (contents == NULL)
{
contents = insn;
else
contents += irela->r_offset;
- if (is_branch (contents) || is_hint (contents))
+ branch = is_branch (contents);
+ hint = is_hint (contents);
+ if (branch || hint)
{
- branch = TRUE;
- if ((contents[0] & 0xfd) == 0x31
+ call = (contents[0] & 0xfd) == 0x31;
+ if (call
&& sym_type != STT_FUNC
&& contents != insn)
{
}
}
- if (sym_type != STT_FUNC
- && !branch
- && (sym_sec->flags & SEC_CODE) == 0)
+ if ((!branch && htab->params->ovly_flavour == ovly_soft_icache)
+ || (sym_type != STT_FUNC
+ && !(branch || hint)
+ && (sym_sec->flags & SEC_CODE) == 0))
+ return no_stub;
+
+ /* Usually, symbols in non-overlay sections don't need stubs. */
+ if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index == 0
+ && !htab->params->non_overlay_stubs)
return ret;
/* A reference from some other section to a symbol in an overlay
section needs a stub. */
if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index
!= spu_elf_section_data (input_section->output_section)->u.o.ovl_index)
- ret = ovl_stub;
+ {
+ if (call || sym_type == STT_FUNC)
+ ret = call_ovl_stub;
+ else
+ {
+ ret = br000_ovl_stub;
+
+ if (branch)
+ {
+ unsigned int lrlive = (contents[1] & 0x70) >> 4;
+ ret += lrlive;
+ }
+ }
+ }
/* If this insn isn't a branch then we are possibly taking the
- address of a function and passing it out somehow. */
- return !branch && sym_type == STT_FUNC ? nonovl_stub : ret;
+ address of a function and passing it out somehow. Soft-icache code
+ always generates inline code to do indirect branches. */
+ if (!(branch || hint)
+ && sym_type == STT_FUNC
+ && htab->params->ovly_flavour != ovly_soft_icache)
+ ret = nonovl_stub;
+
+ return ret;
}
static bfd_boolean
head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info);
}
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ {
+ htab->stub_count[ovl] += 1;
+ return TRUE;
+ }
+
addend = 0;
if (irela != NULL)
addend = irela->r_addend;
ila $78,ovl_number
lnop
ila $79,target_address
- br __ovly_load */
+ br __ovly_load
+
+ Software icache stubs are:
+
+ .word target_index
+ .word target_ia;
+ .word lrlive_branchlocalstoreaddr;
+ brasl $75,__icache_br_handler
+ .quad xor_pattern
+*/
static bfd_boolean
-build_stub (struct spu_link_hash_table *htab,
+build_stub (struct bfd_link_info *info,
bfd *ibfd,
asection *isec,
enum _stub_type stub_type,
bfd_vma dest,
asection *dest_sec)
{
- unsigned int ovl, dest_ovl;
+ struct spu_link_hash_table *htab = spu_hash_table (info);
+ unsigned int ovl, dest_ovl, set_id;
struct got_entry *g, **head;
asection *sec;
- bfd_vma addend, from, to;
+ bfd_vma addend, from, to, br_dest, patt;
+ unsigned int lrlive;
ovl = 0;
if (stub_type != nonovl_stub)
if (irela != NULL)
addend = irela->r_addend;
- for (g = *head; g != NULL; g = g->next)
- if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
- break;
- if (g == NULL)
- abort ();
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ {
+ g = bfd_malloc (sizeof *g);
+ if (g == NULL)
+ return FALSE;
+ g->ovl = ovl;
+ g->br_addr = 0;
+ if (irela != NULL)
+ g->br_addr = (irela->r_offset
+ + isec->output_offset
+ + isec->output_section->vma);
+ g->next = *head;
+ *head = g;
+ }
+ else
+ {
+ for (g = *head; g != NULL; g = g->next)
+ if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
+ break;
+ if (g == NULL)
+ abort ();
- if (g->ovl == 0 && ovl != 0)
- return TRUE;
+ if (g->ovl == 0 && ovl != 0)
+ return TRUE;
- if (g->stub_addr != (bfd_vma) -1)
- return TRUE;
+ if (g->stub_addr != (bfd_vma) -1)
+ return TRUE;
+ }
sec = htab->stub_sec[ovl];
dest += dest_sec->output_offset + dest_sec->output_section->vma;
sec->contents + sec->size + 4);
bfd_put_32 (sec->owner, ILA + ((dest << 7) & 0x01ffff80) + 79,
sec->contents + sec->size + 8);
- bfd_put_32 (sec->owner, BR + (((to - (from + 12)) << 5) & 0x007fff80),
- sec->contents + sec->size + 12);
+ if (!BRA_STUBS)
+ bfd_put_32 (sec->owner, BR + (((to - (from + 12)) << 5) & 0x007fff80),
+ sec->contents + sec->size + 12);
+ else
+ bfd_put_32 (sec->owner, BRA + ((to << 5) & 0x007fff80),
+ sec->contents + sec->size + 12);
break;
case ovly_compact:
- bfd_put_32 (sec->owner, BRSL + (((to - from) << 5) & 0x007fff80) + 75,
- sec->contents + sec->size);
+ if (!BRA_STUBS)
+ bfd_put_32 (sec->owner, BRSL + (((to - from) << 5) & 0x007fff80) + 75,
+ sec->contents + sec->size);
+ else
+ bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
+ sec->contents + sec->size);
bfd_put_32 (sec->owner, (dest & 0x3ffff) | (dest_ovl << 18),
sec->contents + sec->size + 4);
break;
+ case ovly_soft_icache:
+ lrlive = 0;
+ if (stub_type == nonovl_stub)
+ ;
+ else if (stub_type == call_ovl_stub)
+ /* A brsl makes lr live and *(*sp+16) is live.
+ Tail calls have the same liveness. */
+ lrlive = 5;
+ else if (!htab->params->lrlive_analysis)
+ /* Assume stack frame and lr save. */
+ lrlive = 1;
+ else if (irela != NULL)
+ {
+ /* Analyse branch instructions. */
+ struct function_info *caller;
+ bfd_vma off;
+
+ caller = find_function (isec, irela->r_offset, info);
+ if (caller->start == NULL)
+ off = irela->r_offset;
+ else
+ {
+ struct function_info *found = NULL;
+
+ /* Find the earliest piece of this function that
+ has frame adjusting instructions. We might
+ see dynamic frame adjustment (eg. for alloca)
+ in some later piece, but functions using
+ alloca always set up a frame earlier. Frame
+ setup instructions are always in one piece. */
+ if (caller->lr_store != (bfd_vma) -1
+ || caller->sp_adjust != (bfd_vma) -1)
+ found = caller;
+ while (caller->start != NULL)
+ {
+ caller = caller->start;
+ if (caller->lr_store != (bfd_vma) -1
+ || caller->sp_adjust != (bfd_vma) -1)
+ found = caller;
+ }
+ if (found != NULL)
+ caller = found;
+ off = (bfd_vma) -1;
+ }
+
+ if (off > caller->sp_adjust)
+ {
+ if (off > caller->lr_store)
+ /* Only *(*sp+16) is live. */
+ lrlive = 1;
+ else
+ /* If no lr save, then we must be in a
+ leaf function with a frame.
+ lr is still live. */
+ lrlive = 4;
+ }
+ else if (off > caller->lr_store)
+ {
+ /* Between lr save and stack adjust. */
+ lrlive = 3;
+ /* This should never happen since prologues won't
+ be split here. */
+ BFD_ASSERT (0);
+ }
+ else
+ /* On entry to function. */
+ lrlive = 5;
+
+ if (stub_type != br000_ovl_stub
+ && lrlive != stub_type - br000_ovl_stub)
+ info->callbacks->einfo (_("%A:0x%v lrlive .brinfo (%u) differs "
+ "from analysis (%u)\n"),
+ isec, irela->r_offset, lrlive,
+ stub_type - br000_ovl_stub);
+ }
+
+ /* If given lrlive info via .brinfo, use it. */
+ if (stub_type > br000_ovl_stub)
+ lrlive = stub_type - br000_ovl_stub;
+
+ /* The branch that uses this stub goes to stub_addr + 12. We'll
+ set up an xor pattern that can be used by the icache manager
+ to modify this branch to go directly to its destination. */
+ g->stub_addr += 12;
+ br_dest = g->stub_addr;
+ if (irela == NULL)
+ {
+ /* Except in the case of _SPUEAR_ stubs, the branch in
+ question is the one in the stub itself. */
+ BFD_ASSERT (stub_type == nonovl_stub);
+ g->br_addr = g->stub_addr;
+ br_dest = to;
+ }
+
+ bfd_put_32 (sec->owner, dest_ovl - 1,
+ sec->contents + sec->size + 0);
+ set_id = (dest_ovl - 1) >> htab->num_lines_log2;
+ bfd_put_32 (sec->owner, (set_id << 18) | (dest & 0x3ffff),
+ sec->contents + sec->size + 4);
+ bfd_put_32 (sec->owner, (lrlive << 29) | (g->br_addr & 0x3ffff),
+ sec->contents + sec->size + 8);
+ bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
+ sec->contents + sec->size + 12);
+ patt = dest ^ br_dest;
+ if (irela != NULL && ELF32_R_TYPE (irela->r_info) == R_SPU_REL16)
+ patt = (dest - g->br_addr) ^ (br_dest - g->br_addr);
+ bfd_put_32 (sec->owner, (patt << 5) & 0x007fff80,
+ sec->contents + sec->size + 16 + (g->br_addr & 0xf));
+ if (ovl == 0)
+ /* Extra space for linked list entries. */
+ sec->size += 16;
+ break;
+
default:
abort ();
}
&& (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0
|| htab->params->non_overlay_stubs))
{
- return build_stub (htab, NULL, NULL, nonovl_stub, h, NULL,
+ return build_stub (info, NULL, NULL, nonovl_stub, h, NULL,
h->root.u.def.value, sym_sec);
}
else
dest = sym->st_value;
dest += irela->r_addend;
- if (!build_stub (htab, ibfd, isec, stub_type, h, irela,
+ if (!build_stub (info, ibfd, isec, stub_type, h, irela,
dest, sym_sec))
goto error_ret_free_internal;
}
flagword flags;
unsigned int i;
asection *stub;
+ const char *ovout;
if (!process_stubs (info, FALSE))
return 0;
htab->params->ovly_flavour + 3))
return 0;
stub->size = htab->stub_count[0] * ovl_stub_size (htab->params->ovly_flavour);
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ /* Extra space for linked list entries. */
+ stub->size += htab->stub_count[0] * 16;
(*htab->params->place_spu_section) (stub, NULL, ".text");
for (i = 0; i < htab->num_overlays; ++i)
(*htab->params->place_spu_section) (stub, osec, NULL);
}
- /* htab->ovtab consists of two arrays.
- . struct {
- . u32 vma;
- . u32 size;
- . u32 file_off;
- . u32 buf;
- . } _ovly_table[];
- .
- . struct {
- . u32 mapped;
- . } _ovly_buf_table[];
- . */
-
flags = (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS | SEC_IN_MEMORY);
htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags);
|| !bfd_set_section_alignment (ibfd, htab->ovtab, 4))
return 0;
- htab->ovtab->size = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
- (*htab->params->place_spu_section) (htab->ovtab, NULL, ".data");
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ {
+ /* Space for icache manager tables.
+ a) Tag array, one quadword per cache line.
+ b) Linked list elements, max_branch per line quadwords.
+ c) Indirect branch descriptors, 8 quadwords. */
+ htab->ovtab->size = 16 * (((1 + htab->params->max_branch)
+ << htab->num_lines_log2)
+ + 8);
+
+ htab->init = bfd_make_section_anyway_with_flags (ibfd, ".ovini", flags);
+ if (htab->init == NULL
+ || !bfd_set_section_alignment (ibfd, htab->init, 4))
+ return 0;
+
+ htab->init->size = 16;
+ (*htab->params->place_spu_section) (htab->init, NULL, ".ovl.init");
+ }
+ else
+ {
+ /* htab->ovtab consists of two arrays.
+ . struct {
+ . u32 vma;
+ . u32 size;
+ . u32 file_off;
+ . u32 buf;
+ . } _ovly_table[];
+ .
+ . struct {
+ . u32 mapped;
+ . } _ovly_buf_table[];
+ . */
+
+ htab->ovtab->size = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
+ }
+ ovout = ".data";
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ ovout = ".data.icache";
+ (*htab->params->place_spu_section) (htab->ovtab, NULL, ovout);
htab->toe = bfd_make_section_anyway_with_flags (ibfd, ".toe", SEC_ALLOC);
if (htab->toe == NULL
|| !bfd_set_section_alignment (ibfd, htab->toe, 4))
return 0;
- htab->toe->size = 16;
+ htab->toe->size = htab->params->ovly_flavour == ovly_soft_icache ? 256 : 16;
(*htab->params->place_spu_section) (htab->toe, NULL, ".toe");
return 2;
return *ovl_bfd != NULL;
}
+static unsigned int
+overlay_index (asection *sec)
+{
+ if (sec == NULL
+ || sec->output_section == bfd_abs_section_ptr)
+ return 0;
+ return spu_elf_section_data (sec->output_section)->u.o.ovl_index;
+}
+
/* Define an STT_OBJECT symbol. */
static struct elf_link_hash_entry *
/* Fill in all stubs and the overlay tables. */
-bfd_boolean
+static bfd_boolean
spu_elf_build_stubs (struct bfd_link_info *info)
{
struct spu_link_hash_table *htab = spu_hash_table (info);
htab->stub_sec[i]->size = 0;
}
- h = elf_link_hash_lookup (&htab->elf, "__ovly_load", FALSE, FALSE, FALSE);
- htab->ovly_load = h;
+ h = htab->ovly_load;
+ if (h == NULL)
+ {
+ const char *ovly_mgr_entry = "__ovly_load";
+
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ ovly_mgr_entry = "__icache_br_handler";
+ h = elf_link_hash_lookup (&htab->elf, ovly_mgr_entry,
+ FALSE, FALSE, FALSE);
+ htab->ovly_load = h;
+ }
BFD_ASSERT (h != NULL
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
return FALSE;
}
- h = elf_link_hash_lookup (&htab->elf, "__ovly_return", FALSE, FALSE, FALSE);
- htab->ovly_return = h;
+ h = htab->ovly_return;
+ if (h == NULL && htab->params->ovly_flavour != ovly_soft_icache)
+ {
+ h = elf_link_hash_lookup (&htab->elf, "__ovly_return",
+ FALSE, FALSE, FALSE);
+ htab->ovly_return = h;
+ }
/* Fill in all the stubs. */
process_stubs (info, TRUE);
htab->stub_sec[i]->rawsize = 0;
}
+ if (htab->ovtab == NULL || htab->ovtab->size == 0)
+ return TRUE;
+
htab->ovtab->contents = bfd_zalloc (htab->ovtab->owner, htab->ovtab->size);
if (htab->ovtab->contents == NULL)
return FALSE;
- /* Write out _ovly_table. */
p = htab->ovtab->contents;
- /* set low bit of .size to mark non-overlay area as present. */
- p[7] = 1;
- obfd = htab->ovtab->output_section->owner;
- for (s = obfd->sections; s != NULL; s = s->next)
+ if (htab->params->ovly_flavour == ovly_soft_icache)
{
- unsigned int ovl_index = spu_elf_section_data (s)->u.o.ovl_index;
+#define BI_HANDLER "__icache_ptr___icache_bi_handler0"
+ char name[sizeof (BI_HANDLER)];
+ bfd_vma off, icache_base, linklist, bihand;
+
+ h = define_ovtab_symbol (htab, "__icache_tagbase");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = 0;
+ h->size = 16 << htab->num_lines_log2;
+ off = h->size;
+ icache_base = htab->ovl_sec[0]->vma;
+ linklist = (htab->ovtab->output_section->vma
+ + htab->ovtab->output_offset
+ + off);
+ for (i = 0; i < htab->params->num_lines; i++)
+ {
+ bfd_vma line_end = icache_base + ((i + 1) << htab->line_size_log2);
+ bfd_vma stub_base = line_end - htab->params->max_branch * 32;
+ bfd_vma link_elem = linklist + i * htab->params->max_branch * 16;
+ bfd_vma locator = link_elem - stub_base / 2;
+
+ bfd_put_32 (htab->ovtab->owner, locator, p + 4);
+ bfd_put_16 (htab->ovtab->owner, link_elem, p + 8);
+ bfd_put_16 (htab->ovtab->owner, link_elem, p + 10);
+ bfd_put_16 (htab->ovtab->owner, link_elem, p + 12);
+ bfd_put_16 (htab->ovtab->owner, link_elem, p + 14);
+ p += 16;
+ }
+
+ h = define_ovtab_symbol (htab, "__icache_linked_list");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = off;
+ h->size = htab->params->max_branch << (htab->num_lines_log2 + 4);
+ off += h->size;
+ p += h->size;
+
+ h = elf_link_hash_lookup (&htab->elf, "__icache_bi_handler",
+ FALSE, FALSE, FALSE);
+ bihand = 0;
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->def_regular)
+ bihand = (h->root.u.def.value
+ + h->root.u.def.section->output_offset
+ + h->root.u.def.section->output_section->vma);
+ memcpy (name, BI_HANDLER, sizeof (BI_HANDLER));
+ for (i = 0; i < 8; i++)
+ {
+ name[sizeof (BI_HANDLER) - 2] = '0' + i;
+ h = define_ovtab_symbol (htab, name);
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = off;
+ h->size = 16;
+ bfd_put_32 (htab->ovtab->owner, bihand, p);
+ bfd_put_32 (htab->ovtab->owner, i << 28, p + 8);
+ p += 16;
+ off += 16;
+ }
+
+ h = define_ovtab_symbol (htab, "__icache_base");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = 0;
+ h->root.u.def.section = htab->ovl_sec[0];
+ h->size = htab->num_buf << htab->line_size_log2;
- if (ovl_index != 0)
+ if (htab->init != NULL && htab->init->size != 0)
{
- unsigned long off = ovl_index * 16;
- unsigned int ovl_buf = spu_elf_section_data (s)->u.o.ovl_buf;
+ htab->init->contents = bfd_zalloc (htab->init->owner,
+ htab->init->size);
+ if (htab->init->contents == NULL)
+ return FALSE;
- bfd_put_32 (htab->ovtab->owner, s->vma, p + off);
- bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16, p + off + 4);
- /* file_off written later in spu_elf_modify_program_headers. */
- bfd_put_32 (htab->ovtab->owner, ovl_buf, p + off + 12);
+ h = define_ovtab_symbol (htab, "__icache_fileoff");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = 0;
+ h->root.u.def.section = htab->init;
+ h->size = 8;
}
}
+ else
+ {
+ /* Write out _ovly_table. */
+ /* set low bit of .size to mark non-overlay area as present. */
+ p[7] = 1;
+ obfd = htab->ovtab->output_section->owner;
+ for (s = obfd->sections; s != NULL; s = s->next)
+ {
+ unsigned int ovl_index = spu_elf_section_data (s)->u.o.ovl_index;
- h = define_ovtab_symbol (htab, "_ovly_table");
- if (h == NULL)
- return FALSE;
- h->root.u.def.value = 16;
- h->size = htab->num_overlays * 16;
+ if (ovl_index != 0)
+ {
+ unsigned long off = ovl_index * 16;
+ unsigned int ovl_buf = spu_elf_section_data (s)->u.o.ovl_buf;
+
+ bfd_put_32 (htab->ovtab->owner, s->vma, p + off);
+ bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16,
+ p + off + 4);
+ /* file_off written later in spu_elf_modify_program_headers. */
+ bfd_put_32 (htab->ovtab->owner, ovl_buf, p + off + 12);
+ }
+ }
- h = define_ovtab_symbol (htab, "_ovly_table_end");
- if (h == NULL)
- return FALSE;
- h->root.u.def.value = htab->num_overlays * 16 + 16;
- h->size = 0;
+ h = define_ovtab_symbol (htab, "_ovly_table");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = 16;
+ h->size = htab->num_overlays * 16;
- h = define_ovtab_symbol (htab, "_ovly_buf_table");
- if (h == NULL)
- return FALSE;
- h->root.u.def.value = htab->num_overlays * 16 + 16;
- h->size = htab->num_buf * 4;
+ h = define_ovtab_symbol (htab, "_ovly_table_end");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = htab->num_overlays * 16 + 16;
+ h->size = 0;
- h = define_ovtab_symbol (htab, "_ovly_buf_table_end");
- if (h == NULL)
- return FALSE;
- h->root.u.def.value = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
- h->size = 0;
+ h = define_ovtab_symbol (htab, "_ovly_buf_table");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = htab->num_overlays * 16 + 16;
+ h->size = htab->num_buf * 4;
+
+ h = define_ovtab_symbol (htab, "_ovly_buf_table_end");
+ if (h == NULL)
+ return FALSE;
+ h->root.u.def.value = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
+ h->size = 0;
+ }
h = define_ovtab_symbol (htab, "_EAR_");
if (h == NULL)
return FALSE;
h->root.u.def.section = htab->toe;
h->root.u.def.value = 0;
- h->size = 16;
+ h->size = htab->params->ovly_flavour == ovly_soft_icache ? 16 * 16 : 16;
return TRUE;
}
return m->sections[i];
/* No need for overlays if it all fits. */
- htab->params->auto_overlay = 0;
+ if (htab->params->ovly_flavour != ovly_soft_icache)
+ htab->params->auto_overlay = 0;
return NULL;
}
/* OFFSET in SEC (presumably) is the beginning of a function prologue.
- Search for stack adjusting insns, and return the sp delta. */
+ Search for stack adjusting insns, and return the sp delta.
+ If a store of lr is found save the instruction offset to *LR_STORE.
+ If a stack adjusting instruction is found, save that offset to
+ *SP_ADJUST. */
static int
-find_function_stack_adjust (asection *sec, bfd_vma offset)
+find_function_stack_adjust (asection *sec,
+ bfd_vma offset,
+ bfd_vma *lr_store,
+ bfd_vma *sp_adjust)
{
int reg[128];
if (!bfd_get_section_contents (sec->owner, sec, buf, offset, 4))
break;
- if (buf[0] == 0x24 /* stqd */)
- continue;
-
rt = buf[3] & 0x7f;
ra = ((buf[2] & 0x3f) << 1) | (buf[3] >> 7);
+
+ if (buf[0] == 0x24 /* stqd */)
+ {
+ if (rt == 0 /* lr */ && ra == 1 /* sp */)
+ *lr_store = offset;
+ continue;
+ }
+
/* Partly decoded immediate field. */
imm = (buf[1] << 9) | (buf[2] << 1) | (buf[3] >> 7);
{
if (reg[rt] > 0)
break;
+ *sp_adjust = offset;
return reg[rt];
}
}
{
if (reg[rt] > 0)
break;
+ *sp_adjust = offset;
return reg[rt];
}
}
sinfo->fun[i].u.sym = sym_h;
sinfo->fun[i].lo = off;
sinfo->fun[i].hi = off + size;
- sinfo->fun[i].stack = -find_function_stack_adjust (sec, off);
+ sinfo->fun[i].lr_store = -1;
+ sinfo->fun[i].sp_adjust = -1;
+ sinfo->fun[i].stack = -find_function_stack_adjust (sec, off,
+ &sinfo->fun[i].lr_store,
+ &sinfo->fun[i].sp_adjust);
sinfo->num_fun += 1;
return &sinfo->fun[i];
}
Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
Elf_Internal_Shdr *symtab_hdr;
void *psyms;
+ unsigned int priority = 0;
static bfd_boolean warned;
if (!interesting_section (sec)
if (is_branch (insn))
{
is_call = (insn[0] & 0xfd) == 0x31;
+ priority = insn[1] & 0x0f;
+ priority <<= 8;
+ priority |= insn[2];
+ priority <<= 8;
+ priority |= insn[3];
+ priority >>= 7;
if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE))
!= (SEC_ALLOC | SEC_LOAD | SEC_CODE))
{
return FALSE;
callee->is_tail = !is_call;
callee->is_pasted = FALSE;
+ callee->priority = priority;
callee->count = 0;
if (callee->fun->last_caller != sec)
{
}
else if (call->fun->marking)
{
- if (!spu_hash_table (info)->params->auto_overlay)
+ struct spu_link_hash_table *htab = spu_hash_table (info);
+
+ if (!htab->params->auto_overlay
+ && htab->params->stack_analysis)
{
const char *f1 = func_name (fun);
const char *f2 = func_name (call->fun);
return for_each_node (mark_detached_root, info, &depth, FALSE);
}
-/* qsort predicate to sort calls by max_depth then count. */
+/* qsort predicate to sort calls by priority, max_depth then count. */
static int
sort_calls (const void *a, const void *b)
struct call_info *const *c2 = b;
int delta;
+ delta = (*c2)->priority - (*c1)->priority;
+ if (delta != 0)
+ return delta;
+
delta = (*c2)->max_depth - (*c1)->max_depth;
if (delta != 0)
return delta;
}
/* Don't put entry code into an overlay. The overlay manager needs
- a stack! */
+ a stack! Also, don't mark .ovl.init as an overlay. */
if (fun->lo + fun->sec->output_offset + fun->sec->output_section->vma
- == info->output_bfd->start_address)
+ == info->output_bfd->start_address
+ || strncmp (fun->sec->output_section->name, ".ovl.init", 9) == 0)
{
fun->sec->linker_mark = 0;
if (fun->rodata != NULL)
size = fun->sec->size;
if (fun->rodata)
size += fun->rodata->size;
+
if (size <= lib_param->lib_size)
{
*lib_param->lib_sections++ = fun->sec;
return TRUE;
f1 = func_name (fun);
- if (!fun->non_root)
- info->callbacks->info (_(" %s: 0x%v\n"), f1, (bfd_vma) cum_stack);
- info->callbacks->minfo (_("%s: 0x%v 0x%v\n"),
- f1, (bfd_vma) stack, (bfd_vma) cum_stack);
-
- if (has_call)
+ if (htab->params->stack_analysis)
{
- info->callbacks->minfo (_(" calls:\n"));
- for (call = fun->call_list; call; call = call->next)
- if (!call->is_pasted)
- {
- const char *f2 = func_name (call->fun);
- const char *ann1 = call->fun == max ? "*" : " ";
- const char *ann2 = call->is_tail ? "t" : " ";
+ if (!fun->non_root)
+ info->callbacks->info (_(" %s: 0x%v\n"), f1, (bfd_vma) cum_stack);
+ info->callbacks->minfo (_("%s: 0x%v 0x%v\n"),
+ f1, (bfd_vma) stack, (bfd_vma) cum_stack);
- info->callbacks->minfo (_(" %s%s %s\n"), ann1, ann2, f2);
- }
+ if (has_call)
+ {
+ info->callbacks->minfo (_(" calls:\n"));
+ for (call = fun->call_list; call; call = call->next)
+ if (!call->is_pasted)
+ {
+ const char *f2 = func_name (call->fun);
+ const char *ann1 = call->fun == max ? "*" : " ";
+ const char *ann2 = call->is_tail ? "t" : " ";
+
+ info->callbacks->minfo (_(" %s%s %s\n"), ann1, ann2, f2);
+ }
+ }
}
if (sum_stack_param->emit_stack_syms)
return strcmp ((*abfd1)->filename, (*abfd2)->filename);
}
+static unsigned int
+print_one_overlay_section (FILE *script,
+ unsigned int base,
+ unsigned int count,
+ unsigned int ovlynum,
+ unsigned int *ovly_map,
+ asection **ovly_sections,
+ struct bfd_link_info *info)
+{
+ unsigned int j;
+
+ for (j = base; j < count && ovly_map[j] == ovlynum; j++)
+ {
+ asection *sec = ovly_sections[2 * j];
+
+ if (fprintf (script, " %s%c%s (%s)\n",
+ (sec->owner->my_archive != NULL
+ ? sec->owner->my_archive->filename : ""),
+ info->path_separator,
+ sec->owner->filename,
+ sec->name) <= 0)
+ return -1;
+ if (sec->segment_mark)
+ {
+ struct call_info *call = find_pasted_call (sec);
+ while (call != NULL)
+ {
+ struct function_info *call_fun = call->fun;
+ sec = call_fun->sec;
+ if (fprintf (script, " %s%c%s (%s)\n",
+ (sec->owner->my_archive != NULL
+ ? sec->owner->my_archive->filename : ""),
+ info->path_separator,
+ sec->owner->filename,
+ sec->name) <= 0)
+ return -1;
+ for (call = call_fun->call_list; call; call = call->next)
+ if (call->is_pasted)
+ break;
+ }
+ }
+ }
+
+ for (j = base; j < count && ovly_map[j] == ovlynum; j++)
+ {
+ asection *sec = ovly_sections[2 * j + 1];
+ if (sec != NULL
+ && fprintf (script, " %s%c%s (%s)\n",
+ (sec->owner->my_archive != NULL
+ ? sec->owner->my_archive->filename : ""),
+ info->path_separator,
+ sec->owner->filename,
+ sec->name) <= 0)
+ return -1;
+
+ sec = ovly_sections[2 * j];
+ if (sec->segment_mark)
+ {
+ struct call_info *call = find_pasted_call (sec);
+ while (call != NULL)
+ {
+ struct function_info *call_fun = call->fun;
+ sec = call_fun->rodata;
+ if (sec != NULL
+ && fprintf (script, " %s%c%s (%s)\n",
+ (sec->owner->my_archive != NULL
+ ? sec->owner->my_archive->filename : ""),
+ info->path_separator,
+ sec->owner->filename,
+ sec->name) <= 0)
+ return -1;
+ for (call = call_fun->call_list; call; call = call->next)
+ if (call->is_pasted)
+ break;
+ }
+ }
+ }
+
+ return j;
+}
+
/* Handle --auto-overlay. */
static void spu_elf_auto_overlay (struct bfd_link_info *)
unsigned int *ovly_map;
FILE *script;
unsigned int total_overlay_size, overlay_size;
+ const char *ovly_mgr_entry;
struct elf_link_hash_entry *h;
struct _mos_param mos_param;
struct _uos_param uos_param;
= bfd_get_section_by_name (info->output_bfd, ".interrupt");
htab = spu_hash_table (info);
- h = elf_link_hash_lookup (&htab->elf, "__ovly_load",
+ ovly_mgr_entry = "__ovly_load";
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ ovly_mgr_entry = "__icache_br_handler";
+ h = elf_link_hash_lookup (&htab->elf, ovly_mgr_entry,
FALSE, FALSE, FALSE);
if (h != NULL
&& (h->root.type == bfd_link_hash_defined
fixed_size -= sec->size;
total_overlay_size += sec->size;
}
+ else if ((sec->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)
+ && sec->output_section->owner == info->output_bfd
+ && strncmp (sec->output_section->name, ".ovl.init", 9) == 0)
+ fixed_size -= sec->size;
if (count != old_count)
bfd_arr[bfd_count++] = ibfd;
}
fixed_size += htab->non_ovly_stub * ovl_stub_size (htab->params->ovly_flavour);
if (fixed_size + mos_param.max_overlay_size <= htab->local_store)
{
- /* Guess number of overlays. Assuming overlay buffer is on
- average only half full should be conservative. */
- ovlynum = total_overlay_size * 2 / (htab->local_store - fixed_size);
- /* Space for _ovly_table[], _ovly_buf_table[] and toe. */
- fixed_size += ovlynum * 16 + 16 + 4 + 16;
+ if (htab->params->ovly_flavour == ovly_soft_icache)
+ {
+ /* Stubs in the non-icache area are bigger. */
+ fixed_size += htab->non_ovly_stub * 16;
+ /* Space for icache manager tables.
+ a) Tag array, one quadword per cache line.
+ - word 0: ia address of present line, init to zero.
+ - word 1: link locator. link_elem=stub_addr/2+locator
+ - halfwords 4-7: head/tail pointers for linked lists. */
+ fixed_size += 16 << htab->num_lines_log2;
+ /* b) Linked list elements, max_branch per line. */
+ fixed_size += htab->params->max_branch << (htab->num_lines_log2 + 4);
+ /* c) Indirect branch descriptors, 8 quadwords. */
+ fixed_size += 8 * 16;
+ /* d) Pointers to __ea backing store, 16 quadwords. */
+ fixed_size += 16 * 16;
+ }
+ else
+ {
+ /* Guess number of overlays. Assuming overlay buffer is on
+ average only half full should be conservative. */
+ ovlynum = (total_overlay_size * 2 * htab->params->num_lines
+ / (htab->local_store - fixed_size));
+ /* Space for _ovly_table[], _ovly_buf_table[] and toe. */
+ fixed_size += ovlynum * 16 + 16 + 4 + 16;
+ }
}
if (fixed_size + mos_param.max_overlay_size > htab->local_store)
goto err_exit;
memset (&dummy_caller, 0, sizeof (dummy_caller));
- overlay_size = (htab->local_store - fixed_size) / htab->params->num_regions;
+ overlay_size = (htab->local_store - fixed_size) / htab->params->num_lines;
+ if (htab->params->line_size != 0)
+ overlay_size = htab->params->line_size;
base = 0;
ovlynum = 0;
while (base < count)
break;
}
}
+ if (htab->params->ovly_flavour == ovly_soft_icache
+ && num_stubs > htab->params->max_branch)
+ break;
if (tmp + num_stubs * ovl_stub_size (htab->params->ovly_flavour)
> overlay_size)
break;
-
size = tmp;
}
if (fprintf (script, "SECTIONS\n{\n") <= 0)
goto file_err;
- for (region = 1; region <= htab->params->num_regions; region++)
+ if (htab->params->ovly_flavour == ovly_soft_icache)
{
- ovlynum = region;
+ if (fprintf (script,
+ " .data.icache ALIGN (16) : { *(.ovtab) *(.data.icache) }\n"
+ " . = ALIGN (%u);\n"
+ " .ovl.init : { *(.ovl.init) }\n"
+ " . = ABSOLUTE (ADDR (.ovl.init));\n",
+ htab->params->line_size) <= 0)
+ goto file_err;
+
base = 0;
- while (base < count && ovly_map[base] < ovlynum)
- base++;
+ ovlynum = 1;
+ while (base < count)
+ {
+ unsigned int indx = ovlynum - 1;
+ unsigned int vma, lma;
- if (base == count)
- break;
+ vma = (indx & (htab->num_lines_log2 - 1)) << htab->line_size_log2;
+ lma = indx << htab->line_size_log2;
+
+ if (fprintf (script, " .ovly%u ABSOLUTE (ADDR (.ovl.init)) + %u "
+ ": AT (ALIGN (LOADADDR (.ovl.init) + SIZEOF (.ovl.init), 16) + %u) {\n",
+ ovlynum, vma, lma) <= 0)
+ goto file_err;
+
+ base = print_one_overlay_section (script, base, count, ovlynum,
+ ovly_map, ovly_sections, info);
+ if (base == (unsigned) -1)
+ goto file_err;
+
+ if (fprintf (script, " }\n") <= 0)
+ goto file_err;
+
+ ovlynum++;
+ }
- if (fprintf (script, " OVERLAY :\n {\n") <= 0)
+ if (fprintf (script, " . = ABSOLUTE (ADDR (.ovl.init)) + %u;\n",
+ 1 << (htab->num_lines_log2 + htab->line_size_log2)) <= 0)
+ goto file_err;
+ }
+ else
+ {
+ if (fprintf (script,
+ " . = ALIGN (16);\n"
+ " .ovl.init : { *(.ovl.init) }\n"
+ " . = ABSOLUTE (ADDR (.ovl.init));\n") <= 0)
goto file_err;
- while (base < count)
+ for (region = 1; region <= htab->params->num_lines; region++)
{
- unsigned int j;
-
- if (fprintf (script, " .ovly%u {\n", ovlynum) <= 0)
- goto file_err;
+ ovlynum = region;
+ base = 0;
+ while (base < count && ovly_map[base] < ovlynum)
+ base++;
- for (j = base; j < count && ovly_map[j] == ovlynum; j++)
- {
- asection *sec = ovly_sections[2 * j];
+ if (base == count)
+ break;
- if (fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? sec->owner->my_archive->filename : ""),
- info->path_separator,
- sec->owner->filename,
- sec->name) <= 0)
+ if (region == 1)
+ {
+ /* We need to set lma since we are overlaying .ovl.init. */
+ if (fprintf (script,
+ " OVERLAY : AT (ALIGN (LOADADDR (.ovl.init) + SIZEOF (.ovl.init), 16))\n {\n") <= 0)
+ goto file_err;
+ }
+ else
+ {
+ if (fprintf (script, " OVERLAY :\n {\n") <= 0)
goto file_err;
- if (sec->segment_mark)
- {
- struct call_info *call = find_pasted_call (sec);
- while (call != NULL)
- {
- struct function_info *call_fun = call->fun;
- sec = call_fun->sec;
- if (fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? sec->owner->my_archive->filename : ""),
- info->path_separator,
- sec->owner->filename,
- sec->name) <= 0)
- goto file_err;
- for (call = call_fun->call_list; call; call = call->next)
- if (call->is_pasted)
- break;
- }
- }
}
- for (j = base; j < count && ovly_map[j] == ovlynum; j++)
+ while (base < count)
{
- asection *sec = ovly_sections[2 * j + 1];
- if (sec != NULL
- && fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? sec->owner->my_archive->filename : ""),
- info->path_separator,
- sec->owner->filename,
- sec->name) <= 0)
+ if (fprintf (script, " .ovly%u {\n", ovlynum) <= 0)
goto file_err;
- sec = ovly_sections[2 * j];
- if (sec->segment_mark)
- {
- struct call_info *call = find_pasted_call (sec);
- while (call != NULL)
- {
- struct function_info *call_fun = call->fun;
- sec = call_fun->rodata;
- if (sec != NULL
- && fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? sec->owner->my_archive->filename : ""),
- info->path_separator,
- sec->owner->filename,
- sec->name) <= 0)
- goto file_err;
- for (call = call_fun->call_list; call; call = call->next)
- if (call->is_pasted)
- break;
- }
- }
+ base = print_one_overlay_section (script, base, count, ovlynum,
+ ovly_map, ovly_sections, info);
+ if (base == (unsigned) -1)
+ goto file_err;
+
+ if (fprintf (script, " }\n") <= 0)
+ goto file_err;
+
+ ovlynum += htab->params->num_lines;
+ while (base < count && ovly_map[base] < ovlynum)
+ base++;
}
- if (fprintf (script, " }\n") <= 0)
+ if (fprintf (script, " }\n") <= 0)
goto file_err;
-
- base = j;
- ovlynum += htab->params->num_regions;
- while (base < count && ovly_map[base] < ovlynum)
- base++;
}
- if (fprintf (script, " }\n") <= 0)
- goto file_err;
}
free (ovly_map);
return FALSE;
htab = spu_hash_table (info);
- info->callbacks->info (_("Stack size for call graph root nodes.\n"));
- info->callbacks->minfo (_("\nStack size for functions. "
- "Annotations: '*' max stack, 't' tail call\n"));
+ if (htab->params->stack_analysis)
+ {
+ info->callbacks->info (_("Stack size for call graph root nodes.\n"));
+ info->callbacks->minfo (_("\nStack size for functions. "
+ "Annotations: '*' max stack, 't' tail call\n"));
+ }
sum_stack_param.emit_stack_syms = htab->params->emit_stack_syms;
sum_stack_param.overall_stack = 0;
if (!for_each_node (sum_stack, info, &sum_stack_param, TRUE))
return FALSE;
- info->callbacks->info (_("Maximum stack required is 0x%v\n"),
- (bfd_vma) sum_stack_param.overall_stack);
+ if (htab->params->stack_analysis)
+ info->callbacks->info (_("Maximum stack required is 0x%v\n"),
+ (bfd_vma) sum_stack_param.overall_stack);
return TRUE;
}
if (htab->params->auto_overlay)
spu_elf_auto_overlay (info);
- if (htab->params->stack_analysis
+ if ((htab->params->stack_analysis
+ || (htab->params->ovly_flavour == ovly_soft_icache
+ && htab->params->lrlive_analysis))
&& !spu_elf_stack_analysis (info))
- info->callbacks->einfo ("%X%P: stack analysis error: %E\n");
+ info->callbacks->einfo ("%X%P: stack/lrlive analysis error: %E\n");
+
+ if (!spu_elf_build_stubs (info))
+ info->callbacks->einfo ("%F%P: can not build overlay stubs: %E\n");
return bfd_elf_final_link (output_bfd, info);
}
bfd_boolean emit_these_relocs = FALSE;
bfd_boolean is_ea_sym;
bfd_boolean stubs;
+ unsigned int iovl = 0;
htab = spu_hash_table (info);
stubs = (htab->stub_sec != NULL
&& maybe_needs_stubs (input_section));
+ iovl = overlay_index (input_section);
ea = bfd_get_section_by_name (output_bfd, "._ea");
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = (struct elf_link_hash_entry **) (elf_sym_hashes (input_bfd));
bfd_reloc_status_type r;
bfd_boolean unresolved_reloc;
bfd_boolean warned;
+ bfd_boolean overlay_encoded;
enum _stub_type stub_type;
r_symndx = ELF32_R_SYM (rel->r_info);
is_ea_sym = (ea != NULL
&& sec != NULL
&& sec->output_section == ea);
+ overlay_encoded = FALSE;
+
+ /* If this symbol is in an overlay area, we may need to relocate
+ to the overlay stub. */
+ addend = rel->r_addend;
+ if (stubs
+ && !is_ea_sym
+ && (stub_type = needs_ovl_stub (h, sym, sec, input_section, rel,
+ contents, info)) != no_stub)
+ {
+ unsigned int ovl = 0;
+ struct got_entry *g, **head;
+
+ if (stub_type != nonovl_stub)
+ ovl = iovl;
+
+ if (h != NULL)
+ head = &h->got.glist;
+ else
+ head = elf_local_got_ents (input_bfd) + r_symndx;
- if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
+ for (g = *head; g != NULL; g = g->next)
+ if (htab->params->ovly_flavour == ovly_soft_icache
+ ? g->br_addr == (rel->r_offset
+ + input_section->output_offset
+ + input_section->output_section->vma)
+ : g->addend == addend && (g->ovl == ovl || g->ovl == 0))
+ break;
+ if (g == NULL)
+ abort ();
+
+ relocation = g->stub_addr;
+ addend = 0;
+ }
+ else
+ {
+ /* For soft icache, encode the overlay index into addresses. */
+ if (htab->params->ovly_flavour == ovly_soft_icache
+ && !is_ea_sym)
+ {
+ unsigned int ovl = overlay_index (sec);
+ if (ovl != 0)
+ {
+ unsigned int set_id = (ovl - 1) >> htab->num_lines_log2;
+ relocation += set_id << 18;
+ overlay_encoded = set_id != 0;
+ }
+ }
+ }
+
+ if (unresolved_reloc)
+ ;
+ else if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
{
if (is_ea_sym)
{
emit_these_relocs = TRUE;
continue;
}
-
- if (is_ea_sym)
+ else if (is_ea_sym)
unresolved_reloc = TRUE;
if (unresolved_reloc)
ret = FALSE;
}
- /* If this symbol is in an overlay area, we may need to relocate
- to the overlay stub. */
- addend = rel->r_addend;
- if (stubs
- && (stub_type = needs_ovl_stub (h, sym, sec, input_section, rel,
- contents, info)) != no_stub)
- {
- unsigned int ovl = 0;
- struct got_entry *g, **head;
-
- if (stub_type != nonovl_stub)
- ovl = (spu_elf_section_data (input_section->output_section)
- ->u.o.ovl_index);
-
- if (h != NULL)
- head = &h->got.glist;
- else
- head = elf_local_got_ents (input_bfd) + r_symndx;
-
- for (g = *head; g != NULL; g = g->next)
- if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
- break;
- if (g == NULL)
- abort ();
-
- relocation = g->stub_addr;
- addend = 0;
- }
-
r = _bfd_final_link_relocate (howto,
input_bfd,
input_section,
switch (r)
{
case bfd_reloc_overflow:
+ /* FIXME: We don't want to warn on most references
+ within an overlay to itself, but this may silence a
+ warning that should be reported. */
+ if (overlay_encoded && sec == input_section)
+ break;
if (!((*info->callbacks->reloc_overflow)
(info, (h ? &h->root : NULL), sym_name, howto->name,
(bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
struct got_entry *g;
for (g = h->got.glist; g != NULL; g = g->next)
- if (g->addend == 0 && g->ovl == 0)
+ if (htab->params->ovly_flavour == ovly_soft_icache
+ ? g->br_addr == g->stub_addr
+ : g->addend == 0 && g->ovl == 0)
{
sym->st_shndx = (_bfd_elf_section_from_bfd_section
(htab->stub_sec[0]->output_section->owner,
/* Mark this as an overlay header. */
phdr[i].p_flags |= PF_OVERLAY;
- if (htab->ovtab != NULL && htab->ovtab->size != 0)
+ if (htab->ovtab != NULL && htab->ovtab->size != 0
+ && htab->params->ovly_flavour != ovly_soft_icache)
{
bfd_byte *p = htab->ovtab->contents;
unsigned int off = o * 16 + 8;
bfd_put_32 (htab->ovtab->owner, phdr[i].p_offset, p + off);
}
}
+ /* Soft-icache has its file offset put in .ovl.init. */
+ if (htab->init != NULL && htab->init->size != 0)
+ {
+ bfd_vma val = elf_section_data (htab->ovl_sec[0])->this_hdr.sh_offset;
+
+ bfd_put_32 (htab->init->owner, val, htab->init->contents + 4);
+ }
}
/* Round up p_filesz and p_memsz of PT_LOAD segments to multiples
# This shell script emits a C file. -*- C -*-
-# Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+# Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
&spu_elf_load_ovl_mgr,
&spu_elf_open_overlay_script,
&spu_elf_relink,
- 0, ovly_normal, 0, 0, 0, 0,
+ 0, ovly_normal, 0, 0, 0, 0, 0,
0, 0x3ffff,
- 1, 0, 0, 2000
+ 1, 0, 16, 0, 0, 2000
};
+static unsigned int num_lines_set = 0;
+static unsigned int line_size_set = 0;
static char *auto_overlay_file = 0;
int my_argc;
char **my_argv;
if ! cat ${srcdir}/emultempl/spu_ovl.o_c >> e${EMULATION_NAME}.c
then
echo >&2 "Missing ${srcdir}/emultempl/spu_ovl.o_c"
- echo >&2 "You must build gas/as-new with --target=spu to build spu_ovl.o"
+ echo >&2 "You must build gas/as-new with --target=spu"
+ exit 1
+fi
+
+fragment <<EOF
+};
+
+static const char icache_mgr[] = {
+EOF
+
+if ! cat ${srcdir}/emultempl/spu_icache.o_c >> e${EMULATION_NAME}.c
+then
+ echo >&2 "Missing ${srcdir}/emultempl/spu_icache.o_c"
+ echo >&2 "You must build gas/as-new with --target=spu"
exit 1
fi
ovl_mgr + sizeof (ovl_mgr)
};
+static const struct _ovl_stream icache_mgr_stream = {
+ icache_mgr,
+ icache_mgr + sizeof (icache_mgr)
+};
+
static int
is_spu_target (void)
}
/* If O is NULL, add section S at the end of output section OUTPUT_NAME.
- If O is not NULL, add section S at the beginning of output section O.
+ If O is not NULL, add section S at the beginning of output section O,
+ except for soft-icache which adds to the end.
Really, we should be duplicating ldlang.c map_input_to_output_sections
logic here, ie. using the linker script to find where the section
output_name = o->name;
os = lang_output_section_find (output_name);
if (os == NULL)
- gld${EMULATION_NAME}_place_orphan (s, output_name, 0);
- else if (o != NULL && os->children.head != NULL)
+ {
+ os = gld${EMULATION_NAME}_place_orphan (s, output_name, 0);
+ os->addr_tree = NULL;
+ }
+ else if (params.ovly_flavour != ovly_soft_icache
+ && o != NULL && os->children.head != NULL)
{
lang_statement_list_type add;
os->children.head = add.head;
}
else
- lang_add_section (&os->children, s, os);
+ {
+ if (params.ovly_flavour == ovly_soft_icache && o != NULL)
+ {
+ /* Pad this stub section so that it finishes at the
+ end of the icache line. */
+ etree_type *e_size;
+ lang_statement_list_type *save = stat_ptr;
+
+ stat_ptr = &os->children;
+ e_size = exp_intop (params.line_size - s->size);
+ lang_add_assignment (exp_assop ('=', ".", e_size));
+ stat_ptr = save;
+ }
+ lang_add_section (&os->children, s, os);
+ }
s->output_section->size += s->size;
}
spu_elf_load_ovl_mgr (void)
{
struct elf_link_hash_entry *h;
+ const char *ovly_mgr_entry;
+ const struct _ovl_stream *mgr_stream;
bfd_size_type total = 0;
+ ovly_mgr_entry = "__ovly_load";
+ mgr_stream = &ovl_mgr_stream;
+ if (params.ovly_flavour == ovly_soft_icache)
+ {
+ ovly_mgr_entry = "__icache_br_handler";
+ mgr_stream = &icache_mgr_stream;
+ }
h = elf_link_hash_lookup (elf_hash_table (&link_info),
- "__ovly_load", FALSE, FALSE, FALSE);
+ ovly_mgr_entry, FALSE, FALSE, FALSE);
if (h != NULL
&& (h->root.type == bfd_link_hash_defined
{
/* User supplied __ovly_load. */
}
- else if (ovl_mgr_stream.start == ovl_mgr_stream.end)
+ else if (mgr_stream->start == mgr_stream->end)
einfo ("%F%P: no built-in overlay manager\n");
else
{
lang_input_file_is_file_enum,
NULL);
- if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream))
+ if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, mgr_stream))
einfo ("%X%P: can not open built-in overlay manager: %E\n");
else
{
if (!load_symbols (ovl_is, NULL))
einfo ("%X%P: can not load built-in overlay manager: %E\n");
- /* Map overlay manager sections to output sections. */
+ /* Map overlay manager sections to output sections.
+ First try for a matching output section name, if that
+ fails then try mapping .abc.xyz to .abc, otherwise map
+ to .text. */
for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next)
if ((in->flags & (SEC_ALLOC | SEC_LOAD))
== (SEC_ALLOC | SEC_LOAD))
{
- total += in->size;
- spu_place_special_section (in, NULL, ".text");
+ const char *oname = in->name;
+ if (strncmp (in->name, ".ovl.init", 9) != 0)
+ {
+ total += in->size;
+ if (!lang_output_section_find (oname))
+ {
+ lang_output_section_statement_type *os = NULL;
+ char *p = strchr (oname + 1, '.');
+ if (p != NULL)
+ {
+ size_t len = p - oname;
+ p = memcpy (xmalloc (len + 1), oname, len);
+ p[len] = '\0';
+ os = lang_output_section_find (p);
+ free (p);
+ }
+ if (os != NULL)
+ oname = os->name;
+ else
+ oname = ".text";
+ }
+ }
+
+ spu_place_special_section (in, NULL, oname);
}
}
}
}
else if (params.auto_overlay)
einfo ("%P: --auto-overlay ignored with zero local store range\n");
-
- if (!spu_elf_build_stubs (&link_info))
- einfo ("%F%P: can not build overlay stubs: %E\n");
}
finish_default ();
#define OPTION_SPU_AUTO_OVERLAY (OPTION_SPU_STACK_SYMS + 1)
#define OPTION_SPU_AUTO_RELINK (OPTION_SPU_AUTO_OVERLAY + 1)
#define OPTION_SPU_OVERLAY_RODATA (OPTION_SPU_AUTO_RELINK + 1)
-#define OPTION_SPU_NUM_REGIONS (OPTION_SPU_OVERLAY_RODATA + 1)
-#define OPTION_SPU_FIXED_SPACE (OPTION_SPU_NUM_REGIONS + 1)
+#define OPTION_SPU_SOFT_ICACHE (OPTION_SPU_OVERLAY_RODATA + 1)
+#define OPTION_SPU_LINE_SIZE (OPTION_SPU_SOFT_ICACHE + 1)
+#define OPTION_SPU_NUM_LINES (OPTION_SPU_LINE_SIZE + 1)
+#define OPTION_SPU_LRLIVE (OPTION_SPU_NUM_LINES + 1)
+#define OPTION_SPU_FIXED_SPACE (OPTION_SPU_LRLIVE + 1)
#define OPTION_SPU_RESERVED_SPACE (OPTION_SPU_FIXED_SPACE + 1)
#define OPTION_SPU_EXTRA_STACK (OPTION_SPU_RESERVED_SPACE + 1)
#define OPTION_SPU_NO_AUTO_OVERLAY (OPTION_SPU_EXTRA_STACK + 1)
PARSE_AND_LIST_LONGOPTS='
{ "plugin", no_argument, NULL, OPTION_SPU_PLUGIN },
+ { "soft-icache", no_argument, NULL, OPTION_SPU_SOFT_ICACHE },
+ { "lrlive-analysis", no_argument, NULL, OPTION_SPU_LRLIVE },
+ { "num-lines", required_argument, NULL, OPTION_SPU_NUM_LINES },
+ { "line-size", required_argument, NULL, OPTION_SPU_LINE_SIZE },
{ "no-overlays", no_argument, NULL, OPTION_SPU_NO_OVERLAYS },
{ "emit-stub-syms", no_argument, NULL, OPTION_SPU_STUB_SYMS },
{ "extra-overlay-stubs", no_argument, NULL, OPTION_SPU_NON_OVERLAY_STUBS },
{ "auto-overlay", optional_argument, NULL, OPTION_SPU_AUTO_OVERLAY },
{ "auto-relink", no_argument, NULL, OPTION_SPU_AUTO_RELINK },
{ "overlay-rodata", no_argument, NULL, OPTION_SPU_OVERLAY_RODATA },
- { "num-regions", required_argument, NULL, OPTION_SPU_NUM_REGIONS },
+ { "num-regions", required_argument, NULL, OPTION_SPU_NUM_LINES },
+ { "region-size", required_argument, NULL, OPTION_SPU_LINE_SIZE },
{ "fixed-space", required_argument, NULL, OPTION_SPU_FIXED_SPACE },
{ "reserved-space", required_argument, NULL, OPTION_SPU_RESERVED_SPACE },
{ "extra-stack-space", required_argument, NULL, OPTION_SPU_EXTRA_STACK },
--overlay-rodata Place read-only data with associated function\n\
code in overlays.\n\
--num-regions Number of overlay buffers (default 1).\n\
+ --region-size Size of overlay buffers (default 0, auto).\n\
--fixed-space=bytes Local store for non-overlay code and data.\n\
--reserved-space=bytes Local store for stack and heap. If not specified\n\
ld will estimate stack size and assume no heap.\n\
--extra-stack-space=bytes Space for negative sp access (default 2000) if\n\
- --reserved-space not given.\n"
+ --reserved-space not given.\n\
+ --soft-icache Generate software icache overlays.\n\
+ --num-lines Number of soft-icache lines (default 32).\n\
+ --line-size Size of soft-icache lines (default 1k).\n\
+ --lrlive-analysis Scan function prologue for lr liveness.\n"
));
'
params.auto_overlay |= 4;
break;
- case OPTION_SPU_NUM_REGIONS:
+ case OPTION_SPU_SOFT_ICACHE:
+ params.ovly_flavour = ovly_soft_icache;
+ if (!num_lines_set)
+ params.num_lines = 32;
+ else if ((params.num_lines & -params.num_lines) != params.num_lines)
+ einfo (_("%P%F: invalid --num-lines/--num-regions `%u'\''\n"),
+ params.num_lines);
+ if (!line_size_set)
+ params.line_size = 1024;
+ else if ((params.line_size & -params.line_size) != params.line_size)
+ einfo (_("%P%F: invalid --line-size/--region-size `%u'\''\n"),
+ params.line_size);
+ break;
+
+ case OPTION_SPU_LRLIVE:
+ params.lrlive_analysis = 1;
+ break;
+
+ case OPTION_SPU_NUM_LINES:
+ {
+ char *end;
+ params.num_lines = strtoul (optarg, &end, 0);
+ num_lines_set = 1;
+ if (*end == 0
+ && (params.ovly_flavour != ovly_soft_icache
+ || (params.num_lines & -params.num_lines) == params.num_lines))
+ break;
+ einfo (_("%P%F: invalid --num-lines/--num-regions `%s'\''\n"), optarg);
+ }
+ break;
+
+ case OPTION_SPU_LINE_SIZE:
{
char *end;
- params.num_regions = strtoul (optarg, &end, 0);
- if (*end == 0)
+ params.line_size = strtoul (optarg, &end, 0);
+ line_size_set = 1;
+ if (*end == 0
+ && (params.ovly_flavour != ovly_soft_icache
+ || (params.line_size & -params.line_size) == params.line_size))
break;
- einfo (_("%P%F: invalid --num-regions `%s'\''\n"), optarg);
+ einfo (_("%P%F: invalid --line-size/--region-size `%s'\''\n"), optarg);
}
break;
projects / deliverable / binutils-gdb.git / commitdiff
