#include "aout/aout64.h"
#include "hppa_stubs.h"
-/* ELF/PA relocation howto entries. */
+/* The basic stub types supported. If/when shared libraries are
+ implemented some form of IMPORT and EXPORT stubs will be needed. */
+typedef enum
+{
+ HPPA_STUB_ILLEGAL,
+ HPPA_STUB_ARG_RELOC,
+ HPPA_STUB_LONG_CALL,
+} hppa_stub_type;
+
+/* This is a list of all the stubs for a particular BFD. */
+
+typedef struct elf32_hppa_stub_name_list_struct
+{
+ /* The symbol associated with this stub. */
+ asymbol *sym;
+ /* Pointer to chain of all stub chains. */
+ struct elf32_hppa_stub_description_struct *stub_desc;
+ /* Pointer to the stub contents (eg instructions). */
+ int *stub_secp;
+ /* Size of this stub? (in what units? FIXME). */
+ unsigned size;
+ /* Pointer to the next stub entry in the chain. */
+ struct elf32_hppa_stub_name_list_struct *next;
+} elf32_hppa_stub_name_list;
+
+/* This is a linked list in which each entry describes all the
+ linker stubs for a particular bfd. */
+
+typedef struct elf32_hppa_stub_description_struct
+{
+ /* The next group of stubs. */
+ struct elf32_hppa_stub_description_struct *next;
+ /* Used to identify this group of stubs as belonging
+ to a particular bfd. */
+ bfd *this_bfd;
+ /* FIXME: The stub section for this group of stubs? Is
+ this redundant with stub_listP->sym->section? */
+ asection *stub_sec;
+ /* FIXME: what the hell is this? */
+ unsigned relocs_allocated_cnt;
+ /* The current real size of the stubs (in bytes?). */
+ unsigned real_size;
+ /* How much space we have allocated for stubs (in bytes?). */
+ unsigned allocated_size;
+ /* Pointer to the first available space for new stubs. */
+ int *stub_secp;
+ /* Pointer to the beginning of the stubs. FIXME: Why an int *
+ above and a char * here? */
+ char *stub_contents;
+ /* The list of stubs for this bfd. */
+ elf32_hppa_stub_name_list *stub_listP;
+ /* I guess we just carry this around for fun. */
+ struct bfd_link_info *link_info;
+} elf32_hppa_stub_description;
+
+/* FIXME. */
+#define ARGUMENTS 0
+#define RETURN_VALUE 1
+
+/* The various argument relocations that may be performed.
+ Note GRX,GRY really means ARGX,ARGY. */
+typedef enum
+{
+ /* No relocation. */
+ NO_ARG_RELOC,
+ /* Relocate 32 bits from general to FP register. */
+ R_TO_FR,
+ /* Relocate 64 bits from arg0,arg1 to FParg1. */
+ R01_TO_FR,
+ /* Relocate 64 bits from arg2,arg3 to FParg3. */
+ R23_TO_FR,
+ /* Relocate 32 bits from FP to general register. */
+ FR_TO_R,
+ /* Relocate 64 bits from FParg1 to arg0,arg1. */
+ FR_TO_R01,
+ /* Relocate 64 bits from FParg3 to arg2,arg3. */
+ FR_TO_R23,
+ /* Death. */
+ ARG_RELOC_ERR,
+} arg_reloc_type;
+
+/* Where (what register type) is an argument comming from? */
+typedef enum
+{
+ /* Not in a register. */
+ AR_NO,
+ /* In a general argument register. */
+ AR_GR,
+ /* In right half of a FP argument register. */
+ AR_FR,
+ /* In upper (left) half of a FP argument register. */
+ AR_FU,
+ /* In general argument register pair 0 (arg0, arg1). */
+ AR_DBL01,
+ /* In general argument register pair 1 (arg2, arg3). */
+ AR_DBL23,
+} arg_location;
+
+/* What is being relocated (eg which argument or the return value). */
+typedef enum
+{
+ ARG0, ARG1, ARG2, ARG3, RETVAL,
+} arg_reloc_location;
+
+/* Horizontal represents callee's argument location information, vertical
+ represents caller's argument location information. Value at a particular
+ X, Y location represents what (if any) argument relocation needs to
+ be performed to make caller and callee agree. */
+static CONST arg_reloc_type mismatches[6][6] =
+{
+ {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, ARG_RELOC_ERR,
+ NO_ARG_RELOC, NO_ARG_RELOC},
+ {NO_ARG_RELOC, NO_ARG_RELOC, R_TO_FR, ARG_RELOC_ERR,
+ R01_TO_FR, ARG_RELOC_ERR},
+ {NO_ARG_RELOC, FR_TO_R, NO_ARG_RELOC, ARG_RELOC_ERR,
+ ARG_RELOC_ERR, ARG_RELOC_ERR},
+ {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR,
+ ARG_RELOC_ERR, ARG_RELOC_ERR},
+ {NO_ARG_RELOC, FR_TO_R01, NO_ARG_RELOC, ARG_RELOC_ERR,
+ NO_ARG_RELOC, ARG_RELOC_ERR},
+ {NO_ARG_RELOC, FR_TO_R23, NO_ARG_RELOC, ARG_RELOC_ERR,
+ ARG_RELOC_ERR, NO_ARG_RELOC},
+};
+
+/* Likewise for the return value. */
+static CONST arg_reloc_type retval_mismatches[6][6] =
+{
+ {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, ARG_RELOC_ERR,
+ NO_ARG_RELOC, NO_ARG_RELOC},
+ {NO_ARG_RELOC, NO_ARG_RELOC, FR_TO_R, ARG_RELOC_ERR,
+ FR_TO_R01, ARG_RELOC_ERR},
+ {NO_ARG_RELOC, R_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
+ ARG_RELOC_ERR, ARG_RELOC_ERR},
+ {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR,
+ ARG_RELOC_ERR, ARG_RELOC_ERR},
+ {NO_ARG_RELOC, R01_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
+ NO_ARG_RELOC, ARG_RELOC_ERR},
+ {NO_ARG_RELOC, R23_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
+ ARG_RELOC_ERR, NO_ARG_RELOC},
+};
+
+/* Used for index mapping in symbol-extension sections. */
+struct elf32_hppa_symextn_map_struct
+{
+ int old_index;
+ bfd *bfd;
+ asymbol *sym;
+ int new_index;
+};
static bfd_reloc_status_type hppa_elf_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
unsigned long, unsigned long));
static long get_symbol_value PARAMS ((asymbol *));
+
static bfd_reloc_status_type hppa_elf_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd*, char **));
static CONST reloc_howto_type * elf_hppa_reloc_type_lookup
PARAMS ((bfd_arch_info_type *, bfd_reloc_code_real_type));
+static symext_entryS elf32_hppa_get_sym_extn PARAMS ((bfd *, asymbol *, int));
+
+static elf32_hppa_stub_description * find_stubs PARAMS ((bfd *, asection *));
+
+static elf32_hppa_stub_description * new_stub
+ PARAMS ((bfd *, asection *, struct bfd_link_info *));
+
+static arg_reloc_type type_of_mismatch PARAMS ((int, int, int));
+
+static elf32_hppa_stub_name_list * find_stub_by_name
+ PARAMS ((bfd *, asection *, char *));
+
+static elf32_hppa_stub_name_list * add_stub_by_name
+ PARAMS ((bfd *, asection *, asymbol *, struct bfd_link_info *));
+
+static void hppa_elf_stub_finish PARAMS ((bfd *));
+
+static void hppa_elf_stub_reloc
+ PARAMS ((elf32_hppa_stub_description *, bfd *, asymbol *, int,
+ elf32_hppa_reloc_type));
+
+static int hppa_elf_arg_reloc_needed_p
+ PARAMS ((bfd *, arelent *, arg_reloc_type [5], symext_entryS));
+
+static asymbol * hppa_elf_build_linker_stub
+ PARAMS ((bfd *, bfd *, struct bfd_link_info *, arelent *,
+ arg_reloc_type [5], int, unsigned *, hppa_stub_type));
+
+static void hppa_elf_create_stub_sec
+ PARAMS ((bfd *, bfd *, asection **, struct bfd_link_info *));
+
+static int hppa_elf_long_branch_needed_p
+ PARAMS ((bfd *, asection *, arelent *, asymbol *, unsigned));
+
+static boolean hppa_elf_set_section_contents
+ PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
+
+static void elf_info_to_howto
+ PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
+
+static void elf32_hppa_backend_symbol_processing PARAMS ((bfd *, asymbol *));
+
+static boolean elf32_hppa_backend_section_processing
+ PARAMS ((bfd *, Elf32_Internal_Shdr *));
+
+static boolean elf32_hppa_backend_symbol_table_processing
+ PARAMS ((bfd *, elf_symbol_type *, int));
+
+static boolean elf32_hppa_backend_section_from_shdr
+ PARAMS ((bfd *, Elf32_Internal_Shdr *, char *));
+
+static boolean elf32_hppa_backend_fake_sections
+ PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
+
+static boolean elf32_hppa_backend_section_from_bfd_section
+ PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *));
+
+/* ELF/PA relocation howto entries. */
+
static reloc_howto_type elf_hppa_howto_table[ELF_HOWTO_TABLE_SIZE] =
{
{R_HPPA_NONE, 0, 3, 19, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_HPPA_NONE"},
static long GOT_value;
static asymbol *global_symbol;
static int global_sym_defined;
-
static symext_entryS *symextn_contents;
static unsigned int symextn_contents_real_size;
+static elf32_hppa_stub_description *elf_hppa_stub_rootP;
+static boolean stubs_finished = false;
+static struct elf32_hppa_symextn_map_struct *elf32_hppa_symextn_map;
+static int elf32_hppa_symextn_map_size;
+
+static char *linker_stubs = NULL;
+static int linker_stubs_size = 0;
+static int linker_stubs_max_size = 0;
+#define STUB_ALLOC_INCR 100
+#define STUB_SYM_BUFFER_INC 5
/* Relocate the given INSN given the various input parameters.
}
/* Return one (or more) BFD relocations which implement the base
- relocation with modifications based on format and field.
-
- FIXME: Needs a decl in elf32-hppa.h. */
+ relocation with modifications based on format and field. */
elf32_hppa_reloc_type **
hppa_elf_gen_reloc_type (abfd, base_type, format, field)
return;
}
-/* Support for HP PA-RISC stub generation.
-
- Written by
-
- Center for Software Science
- Department of Computer Science
- University of Utah
-
- */
-
-/*
- HP-PA calling conventions state:
+/* Return the symbol extension record of type TYPE for the symbol SYM. */
- 1. an argument relocation stub is required whenever the callee and
- caller argument relocation bits do not match exactly. The exception
- to this rule is if either the caller or callee argument relocation
- bit are 00 (do not relocate).
-
- 2. The linker can optionally add a symbol record for the stub so that
- the stub can be reused. The symbol record will be the same as the
- original export symbol record, except that the relocation bits will
- reflect the input of the stub, the type would be STUB and the symbol
- value will be the location of the relocation stub.
-
- Other notes:
-
- Stubs can be inserted *before* the section of the caller. The stubs
- can be treated as calls to code that manipulates the arguments.
-
- */
-
-typedef enum
- {
- HPPA_STUB_ILLEGAL,
- HPPA_STUB_ARG_RELOC,
- HPPA_STUB_LONG_BRANCH
- } hppa_stub_type;
-
-symext_entryS
+static symext_entryS
elf32_hppa_get_sym_extn (abfd, sym, type)
bfd *abfd;
asymbol *sym;
int type;
{
- /* This function finds the symbol extension record of the */
- /* specified type for the specified symbol. It returns the */
- /* value of the symbol extension record. */
- symext_entryS retval;
-
switch (type)
{
- case HPPA_SXT_NULL:
- retval = (symext_entryS) 0;
- break;
case HPPA_SXT_SYMNDX:
- retval = (symext_entryS) 0; /* XXX: need to fix this */
- break;
+ case HPPA_SXT_NULL:
+ return (symext_entryS) 0;
case HPPA_SXT_ARG_RELOC:
{
elf_symbol_type *esymP = (elf_symbol_type *) sym;
- retval = (symext_entryS) esymP->tc_data.hppa_arg_reloc;
- break;
+ return (symext_entryS) esymP->tc_data.hppa_arg_reloc;
}
/* This should never happen. */
default:
abort();
}
- return retval;
}
-typedef struct elf32_hppa_stub_name_list_struct
-{
- /* name of this stub */
- asymbol *sym;
- /* stub description for this stub */
- struct elf32_hppa_stub_description_struct *stub_desc;
- /* pointer into stub contents */
- int *stub_secp;
- /* size of this stub */
- unsigned size;
- /* next stub name entry */
- struct elf32_hppa_stub_name_list_struct *next;
-} elf32_hppa_stub_name_list;
-
-typedef struct elf32_hppa_stub_description_struct
- {
- struct elf32_hppa_stub_description_struct *next;
- bfd *this_bfd; /* bfd to which this stub applies */
- asection *stub_sec; /* stub section for this bfd */
- unsigned relocs_allocated_cnt; /* count of relocations for this stub section */
- unsigned real_size;
- unsigned allocated_size;
- int *stub_secp; /* pointer to the next available location in the buffer */
- char *stub_contents; /* contents of the stubs for this bfd */
- elf32_hppa_stub_name_list *stub_listP;
- struct bfd_link_info *link_info;
- }
-elf32_hppa_stub_description;
+/* Search the chain of stub descriptions and locate the stub
+ description for this the given section within the given bfd.
-static elf32_hppa_stub_description *elf_hppa_stub_rootP;
+ FIXME: I see yet another wonderful linear linked list search
+ here. This is probably bad. */
-/* Locate the stub section information for the given bfd. */
static elf32_hppa_stub_description *
find_stubs (abfd, stub_sec)
bfd *abfd;
for (stubP = elf_hppa_stub_rootP; stubP; stubP = stubP->next)
{
- if (stubP->this_bfd == abfd
- && stubP->stub_sec == stub_sec)
+ /* Is this the right one? */
+ if (stubP->this_bfd == abfd && stubP->stub_sec == stub_sec)
return stubP;
}
-
- return (elf32_hppa_stub_description *) NULL;
+ return NULL;
}
static elf32_hppa_stub_description *
{
elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
+ /* If we found a list for this bfd, then use it. */
if (stub)
return stub;
- stub = (elf32_hppa_stub_description *) bfd_zalloc (abfd, sizeof (elf32_hppa_stub_description));
+ /* Nope, allocate and initialize a new entry in the stub list chain. */
+ stub = (elf32_hppa_stub_description *)
+ bfd_zalloc (abfd, sizeof (elf32_hppa_stub_description));
if (stub)
{
stub->this_bfd = abfd;
return stub;
}
-/* Locate the stub by the given name. */
+/* Try and locate a stub with the name NAME within the stubs
+ associated with ABFD. More linked list searches. */
+
static elf32_hppa_stub_name_list *
find_stub_by_name (abfd, stub_sec, name)
bfd *abfd;
asection *stub_sec;
char *name;
{
+ /* Find the stubs associated with this bfd. */
elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
+ /* If found, then we have to walk down them looking for a match. */
if (stub)
{
elf32_hppa_stub_name_list *name_listP;
- for (name_listP = stub->stub_listP; name_listP; name_listP = name_listP->next)
+ for (name_listP = stub->stub_listP;
+ name_listP;
+ name_listP = name_listP->next)
{
if (!strcmp (name_listP->sym->name, name))
return name_listP;
}
}
+ /* Not found. */
return 0;
}
-/* Locate the stub by the given name. */
+/* Add a new stub (SYM) to the list of stubs associated with the given BFD. */
static elf32_hppa_stub_name_list *
add_stub_by_name(abfd, stub_sec, sym, link_info)
bfd *abfd;
elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
elf32_hppa_stub_name_list *stub_entry;
+ /* If no stubs are associated with this bfd, then we have to make
+ a chain-of-stubs associated with this bfd. */
if (!stub)
- stub = new_stub(abfd, stub_sec, link_info);
+ stub = new_stub (abfd, stub_sec, link_info);
if (stub)
{
+ /* Allocate and initialize an entry in the stub chain. */
stub_entry = (elf32_hppa_stub_name_list *)
bfd_zalloc (abfd, sizeof (elf32_hppa_stub_name_list));
/* First byte of this stub is the pointer to
the next available location in the stub buffer. */
stub_entry->stub_secp = stub->stub_secp;
+ /* Add it to the chain. */
if (stub->stub_listP)
stub_entry->next = stub->stub_listP;
else
abort(); /* FIXME */
}
}
-
+ /* Death by mis-adventure. */
+ abort ();
return (elf32_hppa_stub_name_list *)NULL;
}
-#define ARGUMENTS 0
-#define RETURN_VALUE 1
-
-#define NO_ARG_RELOC 0
-#define R_TO_FR 1
-#define R01_TO_FR 2
-#define R23_TO_FR 3
-#define FR_TO_R 4
-#define FR_TO_R01 5
-#define FR_TO_R23 6
-#define ARG_RELOC_ERR 7
-
-#define ARG0 0
-#define ARG1 1
-#define ARG2 2
-#define ARG3 3
-#define RETVAL 4
-
-#define AR_NO 0
-#define AR_GR 1
-#define AR_FR 2
-#define AR_FU 3
-/* FP register in arg0/arg1. This value can only appear in the arg0 location. */
-#define AR_DBL01 4
-/* FP register in arg2/arg3. This value can only appear in the arg2 location. */
-#define AR_DBL23 5
-
-#define AR_WARN(type,loc) \
- fprintf(stderr,"WARNING: Illegal argument relocation: %s for %s\n", \
- reloc_type_strings[type],reloc_loc_strings[loc])
-
-static CONST char *CONST reloc_type_strings[] =
-{
- "NONE", "GR->FR", "GR0,GR1->FR1", "GR2,GR3->FR3", "FR->GR", "FR->GR0,GR1", "FR->GR2,GR3", "ERROR"
-};
-
-static CONST char *CONST reloc_loc_strings[] =
-{
- "ARG0", "ARG1", "ARG2", "ARG3", "RETVAL"
-};
-
-static CONST char mismatches[6][6] =
-{ /* CALLEE NONE CALLEE GR CALLEE FR CALLEE FU CALLEE DBL01 CALLEE DBL23 */
- /* CALLER NONE */
- {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, ARG_RELOC_ERR, NO_ARG_RELOC, NO_ARG_RELOC},
- /* CALLER GR */
- {NO_ARG_RELOC, NO_ARG_RELOC, R_TO_FR, ARG_RELOC_ERR, R01_TO_FR, ARG_RELOC_ERR},
- /* CALLER FR */
- {NO_ARG_RELOC, FR_TO_R, NO_ARG_RELOC, ARG_RELOC_ERR, ARG_RELOC_ERR},
- /* CALLER FU */
- {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR},
- /* CALLER DBL01 */
- {NO_ARG_RELOC, FR_TO_R01, NO_ARG_RELOC, ARG_RELOC_ERR, NO_ARG_RELOC, ARG_RELOC_ERR},
- /* CALLER DBL23 */
- {NO_ARG_RELOC, FR_TO_R23, NO_ARG_RELOC, ARG_RELOC_ERR, ARG_RELOC_ERR, NO_ARG_RELOC},
-};
-
-static CONST char retval_mismatches[6][6] =
-{ /* CALLEE NONE CALLEE GR CALLEE FR CALLEE FU CALLEE DBL01 CALLEE DBL23 */
- /* CALLER NONE */
- {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, ARG_RELOC_ERR, NO_ARG_RELOC, NO_ARG_RELOC},
- /* CALLER GR */
- {NO_ARG_RELOC, NO_ARG_RELOC, FR_TO_R, ARG_RELOC_ERR, FR_TO_R01, ARG_RELOC_ERR},
- /* CALLER FR */
- {NO_ARG_RELOC, R_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR},
- /* CALLER FU */
- {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR},
- /* CALLER DBL01 */
- {NO_ARG_RELOC, R01_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR, NO_ARG_RELOC, ARG_RELOC_ERR},
- /* CALLER DBL23 */
- {NO_ARG_RELOC, R23_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR, ARG_RELOC_ERR, NO_ARG_RELOC},
-};
+/* For the given caller/callee argument location information and the
+ type of relocation (arguments or return value), return the type
+ of argument relocation needed to make caller and callee happy. */
-static int
+static arg_reloc_type
type_of_mismatch (caller_bits, callee_bits, type)
int caller_bits;
int callee_bits;
case RETURN_VALUE:
return retval_mismatches[caller_bits][callee_bits];
}
-
- return 0;
+ return ARG_RELOC_ERR;
}
-#define EXTRACT_ARBITS(ar,which) ((ar) >> (8-(which*2))) & 3
+/* Extract specific argument location bits for WHICH from the
+ the full argument location information in AR. */
+#define EXTRACT_ARBITS(ar, which) ((ar) >> (8 - ((which) * 2))) & 3
-#define NEW_INSTRUCTION(entry,insn) \
+/* Add the new instruction INSN into the stub area denoted by ENTRY.
+ FIXME: Looks like more cases where we assume sizeof (int) ==
+ sizeof (insn) which may not be true if building cross tools. */
+#define NEW_INSTRUCTION(entry, insn) \
{ \
*((entry)->stub_desc->stub_secp)++ = (insn); \
- (entry)->stub_desc->real_size += sizeof(int); \
+ (entry)->stub_desc->real_size += sizeof (int); \
(entry)->size += sizeof(int); \
bfd_set_section_size((entry)->stub_desc->this_bfd, \
(entry)->stub_desc->stub_sec, \
(entry)->stub_desc->real_size); \
}
+/* Find the offset of the current stub? Looks more like it
+ finds the offset of the last instruction to me. */
#define CURRENT_STUB_OFFSET(entry) \
((char *)(entry)->stub_desc->stub_secp \
- (char *)(entry)->stub_desc->stub_contents - 4)
-static boolean stubs_finished = false;
+/* All the stubs have already been built, finish up stub stuff
+ by applying relocations to the stubs. */
-void
+static void
hppa_elf_stub_finish (output_bfd)
bfd *output_bfd;
{
elf32_hppa_stub_description *stub_list = elf_hppa_stub_rootP;
- /* All the stubs have been built. Finish up building */
- /* stub section. Apply relocations to the section. */
+ /* If the stubs have been finished, then we're already done. */
if (stubs_finished)
return;
+ /* Walk down the list of stub lists. */
for (; stub_list; stub_list = stub_list->next)
{
+ /* If this list has stubs, then do something. */
if (stub_list->real_size)
{
bfd *stub_bfd = stub_list->this_bfd;
- asection *stub_sec = bfd_get_section_by_name (stub_bfd, ".hppa_linker_stubs");
+ asection *stub_sec = bfd_get_section_by_name (stub_bfd,
+ ".hppa_linker_stubs");
bfd_size_type reloc_size;
arelent **reloc_vector;
+ /* Some sanity checking. */
BFD_ASSERT (stub_sec == stub_list->stub_sec);
- reloc_size = bfd_get_reloc_upper_bound (stub_bfd, stub_sec);
- reloc_vector = (arelent **) alloca (reloc_size);
-
BFD_ASSERT (stub_sec);
- /* We are not relaxing the section, so just copy the size info */
+ /* For stub sections raw_size == cooked_size. Also update
+ reloc_done as we're handling the relocs now. */
stub_sec->_cooked_size = stub_sec->_raw_size;
stub_sec->reloc_done = true;
+ /* Make space to hold the relocations for the stub section. */
+ reloc_size = bfd_get_reloc_upper_bound (stub_bfd, stub_sec);
+ reloc_vector = (arelent **) alloca (reloc_size);
- if (bfd_canonicalize_reloc (stub_bfd,
- stub_sec,
- reloc_vector,
+ /* If we have relocations, do them. */
+ if (bfd_canonicalize_reloc (stub_bfd, stub_sec, reloc_vector,
output_bfd->outsymbols))
{
arelent **parent;
- for (parent = reloc_vector; *parent != (arelent *) NULL;
- parent++)
+ for (parent = reloc_vector; *parent != NULL; parent++)
{
- char *err = (char *) NULL;
+ char *err = NULL;
bfd_reloc_status_type r =
- bfd_perform_relocation (stub_bfd,
- *parent,
+ bfd_perform_relocation (stub_bfd, *parent,
stub_list->stub_contents,
stub_sec, (bfd *) NULL, &err);
-
+ /* If there was an error, tell someone about it. */
if (r != bfd_reloc_ok)
{
struct bfd_link_info *link_info = stub_list->link_info;
}
}
- bfd_set_section_contents (output_bfd,
- stub_sec,
+ /* All done with the relocations. Set the final contents
+ of the stub section. FIXME: no check of return value! */
+ bfd_set_section_contents (output_bfd, stub_sec,
stub_list->stub_contents,
- 0,
- stub_list->real_size);
-
- free (reloc_vector);
+ 0, stub_list->real_size);
}
}
+ /* All done. */
stubs_finished = true;
}
-void
-hppa_elf_stub_branch_reloc (stub_desc, /* the bfd */
- output_bfd, /* the output bfd */
- target_sym, /* the target symbol */
- offset) /* the offset within the stub buffer (pre-calculated) */
- elf32_hppa_stub_description *stub_desc;
- bfd *output_bfd;
- asymbol *target_sym;
- int offset;
-{
- /* Allocate a new relocation entry. */
- arelent relent;
- int size;
-
- if (stub_desc->relocs_allocated_cnt == stub_desc->stub_sec->reloc_count)
- {
- if (stub_desc->stub_sec->relocation == NULL)
- {
- stub_desc->relocs_allocated_cnt = STUB_RELOC_INCR;
- size = sizeof (arelent) * stub_desc->relocs_allocated_cnt;
- stub_desc->stub_sec->relocation = (arelent *) bfd_zmalloc (size);
- }
- else
- {
- stub_desc->relocs_allocated_cnt += STUB_RELOC_INCR;
- size = sizeof (arelent) * stub_desc->relocs_allocated_cnt;
- stub_desc->stub_sec->relocation = (arelent *) realloc (stub_desc->stub_sec->relocation,
- size);
- }
- if (!stub_desc->stub_sec->relocation)
- {
- bfd_set_error (bfd_error_no_memory);
- abort(); /* FIXME */
- }
- }
-
- /* Fill in the details. */
- relent.address = offset;
- relent.addend = 0;
- relent.sym_ptr_ptr = (asymbol **) bfd_zalloc (stub_desc->this_bfd, sizeof (asymbol *));
- BFD_ASSERT (relent.sym_ptr_ptr); /* FIXME */
-
- relent.sym_ptr_ptr[0] = target_sym;
- relent.howto = bfd_reloc_type_lookup (stub_desc->this_bfd, R_HPPA_PCREL_CALL_17);
+/* Allocate a new relocation entry to be used in a linker stub. */
- /* Save it in the array of relocations for the stub section. */
-
- memcpy (&stub_desc->stub_sec->relocation[stub_desc->stub_sec->reloc_count++],
- &relent,
- sizeof (arelent));
-}
-
-void
-hppa_elf_stub_reloc (stub_desc, /* the bfd */
- output_bfd, /* the output bfd */
- target_sym, /* the target symbol */
- offset, /* the offset within the stub buffer (pre-calculated) */
- type)
+static void
+hppa_elf_stub_reloc (stub_desc, output_bfd, target_sym, offset, type)
elf32_hppa_stub_description *stub_desc;
bfd *output_bfd;
asymbol *target_sym;
int offset;
elf32_hppa_reloc_type type;
{
- /* Allocate a new relocation entry. */
arelent relent;
int size;
Elf_Internal_Shdr *rela_hdr;
+ /* I really don't like the realloc nonsense in here. FIXME. */
if (stub_desc->relocs_allocated_cnt == stub_desc->stub_sec->reloc_count)
{
+ /* Allocate the first few relocation entries. */
if (stub_desc->stub_sec->relocation == NULL)
{
stub_desc->relocs_allocated_cnt = STUB_RELOC_INCR;
}
else
{
+ /* We've used all the entries we've already allocated. So get
+ some more. */
stub_desc->relocs_allocated_cnt += STUB_RELOC_INCR;
size = sizeof (arelent) * stub_desc->relocs_allocated_cnt;
- stub_desc->stub_sec->relocation = (arelent *) realloc (stub_desc->stub_sec->relocation,
- size);
+ stub_desc->stub_sec->relocation = (arelent *)
+ realloc (stub_desc->stub_sec->relocation, size);
}
if (!stub_desc->stub_sec->relocation)
{
bfd_set_error (bfd_error_no_memory);
- abort(); /* FIXME */
+ abort (); /* FIXME */
}
}
/* Fill in the details. */
relent.address = offset;
relent.addend = 0;
- relent.sym_ptr_ptr = (asymbol **) bfd_zalloc (stub_desc->this_bfd, sizeof (asymbol *));
- BFD_ASSERT (relent.sym_ptr_ptr); /* FIXME */
-
- relent.sym_ptr_ptr[0] = target_sym;
+ relent.sym_ptr_ptr = &target_sym;
relent.howto = bfd_reloc_type_lookup (stub_desc->this_bfd, type);
- /* Save it in the array of relocations for the stub section. */
-
+ /* Save it in the array of relocations for the stub section. */
memcpy (&stub_desc->stub_sec->relocation[stub_desc->stub_sec->reloc_count++],
- &relent,
- sizeof (arelent));
+ &relent, sizeof (arelent));
}
-asymbol *
-hppa_elf_build_arg_reloc_stub (abfd, output_bfd, link_info, reloc_entry,
- stub_types, rtn_adjust, data)
+/* Build an argument relocation stub. RTN_ADJUST is a hint that an
+ adjust to the return pointer from within the stub itself may be
+ needed. */
+
+static asymbol *
+hppa_elf_build_linker_stub (abfd, output_bfd, link_info, reloc_entry,
+ stub_types, rtn_adjust, data, linker_stub_type)
bfd *abfd;
bfd *output_bfd;
struct bfd_link_info *link_info;
arelent *reloc_entry;
- int stub_types[5];
+ arg_reloc_type stub_types[5];
int rtn_adjust;
unsigned *data;
+ hppa_stub_type linker_stub_type;
{
- asection *stub_sec = bfd_get_section_by_name (abfd, ".hppa_linker_stubs");
- elf32_hppa_stub_description *stub_desc = find_stubs (abfd, stub_sec);
- asymbol *stub_sym = NULL;
- asymbol *target_sym = reloc_entry->sym_ptr_ptr[0];
- asection *output_text_section = bfd_get_section_by_name (output_bfd, ".text");
int i;
+ boolean milli, dyncall;
char stub_sym_name[128];
elf32_hppa_stub_name_list *stub_entry;
+ /* Some initialization. */
unsigned insn = data[0];
+ asymbol *stub_sym = NULL;
+ asymbol *target_sym = reloc_entry->sym_ptr_ptr[0];
+ asection *stub_sec = bfd_get_section_by_name (abfd, ".hppa_linker_stubs");
+ elf32_hppa_stub_description *stub_desc = find_stubs (abfd, stub_sec);
/* Perform some additional checks on whether we should really do the
return adjustment. For example, if the instruction is nullified
rtn_adjust = false;
}
- /* See if the proper stub entry has already been made. */
+ /* Some special code for long-call stubs. */
+ if (linker_stub_type == HPPA_STUB_LONG_CALL)
+ {
+
+ /* Is this a millicode call? If so, the return address
+ comes in on r31 rather than r2 (rp) so a slightly
+ different code sequence is needed. */
+ unsigned rtn_reg = (insn & 0x03e00000) >> 21;
+ if (rtn_reg == 31)
+ milli = true;
+
+ /* Dyncall is special because the user code has already
+ put the return pointer in %r2 (aka RP). Other millicode
+ calls have the return pointer in %r31. */
+ if (strcmp (target_sym->name, "$$dyncall") == 0)
+ dyncall = true;
+
+ /* If we are creating a call from a stub to another stub, then
+ never do the instruction reordering. We can tell if we are
+ going to be calling one stub from another by the fact that
+ the symbol name has '_stub_' (arg. reloc. stub) or '_lb_stub_'
+ prepended to the name. Alternatively, the section of the
+ symbol will be '.hppa_linker_stubs'. This is only an issue
+ for long-calls; they are the only stubs allowed to call another
+ stub. */
+ if ((strncmp (target_sym->name, "_stub_", 6) == 0)
+ || (strncmp (target_sym->name, "_lb_stub_", 9) == 0))
+ {
+ BFD_ASSERT (strcmp (target_sym->section->name, ".hppa_linker_stubs")
+ == 0);
+ rtn_adjust = false;
+ }
+ }
+
+ /* Create the stub section if necessary. */
if (!stub_sec)
{
BFD_ASSERT (stub_desc == NULL);
- stub_sec = bfd_make_section (abfd, ".hppa_linker_stubs");
- bfd_set_section_flags (abfd,
- stub_sec,
- SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
- | SEC_RELOC | SEC_CODE | SEC_READONLY);
- stub_sec->output_section = output_text_section->output_section;
- stub_sec->output_offset = 0;
- bfd_set_section_alignment (abfd, stub_sec, 2);
+ hppa_elf_create_stub_sec (abfd, output_bfd, &stub_sec, link_info);
stub_desc = new_stub (abfd, stub_sec, link_info);
}
stub_desc = new_stub (abfd, stub_sec, link_info);
/* Allocate space to write the stub.
- FIXME. Why using realloc?!? */
+ FIXME: Why using realloc?!? */
if (!stub_desc->stub_contents)
{
stub_desc->allocated_size = STUB_BUFFER_INCR;
stub_desc->stub_contents = (char *) malloc (STUB_BUFFER_INCR);
- if (!stub_desc->stub_contents)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
}
else if ((stub_desc->allocated_size - stub_desc->real_size) < STUB_MAX_SIZE)
{
stub_desc->allocated_size);
}
+ /* If no memory die. (I seriously doubt the other routines
+ are prepared to get a NULL return value). */
+ if (!stub_desc->stub_contents)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ abort ();
+ }
+
+ /* Generate an appropriate name for this stub. */
+ if (linker_stub_type == HPPA_STUB_ARG_RELOC)
+ sprintf (stub_sym_name,
+ "_stub_%s_%02d_%02d_%02d_%02d_%02d_%s",
+ reloc_entry->sym_ptr_ptr[0]->name,
+ stub_types[0], stub_types[1], stub_types[2],
+ stub_types[3], stub_types[4],
+ rtn_adjust ? "RA" : "");
+ else
+ sprintf (stub_sym_name,
+ "_lb_stub_%s_%s", reloc_entry->sym_ptr_ptr[0]->name,
+ rtn_adjust ? "RA" : "");
+
+
stub_desc->stub_secp
= (int *) (stub_desc->stub_contents + stub_desc->real_size);
-
- sprintf (stub_sym_name,
- "_stub_%s_%02d_%02d_%02d_%02d_%02d_%s",
- reloc_entry->sym_ptr_ptr[0]->name,
- stub_types[0], stub_types[1], stub_types[2],
- stub_types[3], stub_types[4],
- rtn_adjust ? "RA" : "");
stub_entry = find_stub_by_name (abfd, stub_sec, stub_sym_name);
+ /* See if we already have one by this name. */
if (stub_entry)
{
+ /* Yes, re-use it. Redirect the original relocation from the
+ old symbol (a function symbol) to the stub (the stub will call
+ the original function). */
stub_sym = stub_entry->sym;
- /* Redirect the original relocation from the old symbol (a function)
- to the stub (the stub calls the function). Should we need to
- change the relocation type? */
- reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (stub_desc->this_bfd,
- sizeof (asymbol *));
- if (!reloc_entry->sym_ptr_ptr)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- reloc_entry->sym_ptr_ptr[0] = stub_sym;
- if (reloc_entry->howto->type != R_HPPA_PLABEL_32
- && (get_opcode(insn) == BLE
- || get_opcode (insn) == BE
- || get_opcode (insn) == BL))
+ reloc_entry->sym_ptr_ptr = &stub_sym;
+ if (linker_stub_type == HPPA_STUB_LONG_CALL
+ || (reloc_entry->howto->type != R_HPPA_PLABEL_32
+ && (get_opcode(insn) == BLE
+ || get_opcode (insn) == BE
+ || get_opcode (insn) == BL)))
reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_HPPA_STUB_CALL_17);
}
else
if (!stub_sym)
{
bfd_set_error (bfd_error_no_memory);
- return NULL;
+ abort ();
}
stub_sym->name = bfd_zalloc (abfd, strlen (stub_sym_name) + 1);
if (!stub_sym->name)
{
bfd_set_error (bfd_error_no_memory);
- return NULL;
+ abort ();
}
strcpy ((char *) stub_sym->name, stub_sym_name);
stub_sym->value
stub_entry = add_stub_by_name (abfd, stub_sec, stub_sym, link_info);
/* Redirect the original relocation from the old symbol (a function)
- to the stub (the stub calls the function). Change the type of
- relocation to be the internal use only stub R_HPPA_STUB_CALL_17. */
- reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (stub_desc->this_bfd,
- sizeof (asymbol *));
- if (!reloc_entry->sym_ptr_ptr)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- reloc_entry->sym_ptr_ptr[0] = stub_sym;
- if (reloc_entry->howto->type != R_HPPA_PLABEL_32
- && (get_opcode (insn) == BLE
- || get_opcode (insn) == BE
- || get_opcode (insn) == BL))
+ to the stub (the stub calls the function). */
+ reloc_entry->sym_ptr_ptr = &stub_sym;
+ if (linker_stub_type == HPPA_STUB_LONG_CALL
+ || (reloc_entry->howto->type != R_HPPA_PLABEL_32
+ && (get_opcode (insn) == BLE
+ || get_opcode (insn) == BE
+ || get_opcode (insn) == BL)))
reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_HPPA_STUB_CALL_17);
- /* Generate common code for all stubs. */
+ /* Now generate the code for the stub. Starting with two
+ common instructions.
- NEW_INSTRUCTION (stub_entry, LDSID_31_1);
- NEW_INSTRUCTION (stub_entry, MTSP_1_SR0);
- NEW_INSTRUCTION (stub_entry, ADDI_8_SP);
+ FIXME: Do we still need the SP adjustment?
+ Do we still need to muck with space registers? */
+ NEW_INSTRUCTION (stub_entry, LDSID_31_1)
+ NEW_INSTRUCTION (stub_entry, MTSP_1_SR0)
- /* Generate code to move the arguments around. */
- for (i = ARG0; i < ARG3; i++)
+ if (linker_stub_type == HPPA_STUB_ARG_RELOC)
{
- if (stub_types[i] != NO_ARG_RELOC)
- {
- switch (stub_types[i])
- {
- case R_TO_FR:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, STWS_ARG0_M8SP);
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG0);
- break;
- case ARG1:
- NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP);
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG1);
- break;
- case ARG2:
- NEW_INSTRUCTION (stub_entry, STWS_ARG2_M8SP);
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG2);
- break;
- case ARG3:
- NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP);
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG3);
- break;
- }
- continue;
-
- case R01_TO_FR:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, STWS_ARG0_M4SP);
- NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP);
- NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG1);
- break;
- default:
- AR_WARN (stub_types[i],i);
- break;
- }
- continue;
-
- case R23_TO_FR:
- switch (i)
- {
- case ARG2:
- NEW_INSTRUCTION (stub_entry, STWS_ARG2_M4SP);
- NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP);
- NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG3);
- break;
- default:
- AR_WARN (stub_types[i],i);
- break;
- }
- continue;
-
- case FR_TO_R:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG0_M8SP);
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0);
- break;
- case ARG1:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG1_M8SP);
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG1);
- break;
- case ARG2:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG2_M8SP);
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2);
- break;
- case ARG3:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG3_M8SP);
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG3);
- break;
- }
- continue;
-
- case FR_TO_R01:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, FSTDS_FARG1_M8SP);
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0);
- NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG1);
- break;
- default:
- AR_WARN (stub_types[i],i);
- break;
- }
- continue;
-
- case FR_TO_R23:
- switch (i)
- {
- case ARG2:
- NEW_INSTRUCTION (stub_entry, FSTDS_FARG3_M8SP);
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2);
- NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG3);
- break;
- default:
- AR_WARN (stub_types[i],i);
- break;
- }
- continue;
-
- }
- }
- }
+ NEW_INSTRUCTION (stub_entry, ADDI_8_SP)
- NEW_INSTRUCTION (stub_entry, ADDI_M8_SP_SP);
+ /* Examine each argument, generating code to relocate it
+ into a different register if necessary. */
+ for (i = ARG0; i < ARG3; i++)
+ {
+ switch (stub_types[i])
+ {
- /* Adjust the return address if necessary. */
- if (rtn_adjust)
+ case NO_ARG_RELOC:
+ continue;
+
+ case R_TO_FR:
+ switch (i)
+ {
+ case ARG0:
+ NEW_INSTRUCTION (stub_entry, STWS_ARG0_M8SP)
+ NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG0)
+ break;
+ case ARG1:
+ NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP)
+ NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG1)
+ break;
+ case ARG2:
+ NEW_INSTRUCTION (stub_entry, STWS_ARG2_M8SP)
+ NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG2)
+ break;
+ case ARG3:
+ NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP)
+ NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG3)
+ break;
+ }
+ continue;
+
+ case R01_TO_FR:
+ switch (i)
+ {
+ case ARG0:
+ NEW_INSTRUCTION (stub_entry, STWS_ARG0_M4SP)
+ NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP)
+ NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG1)
+ break;
+ default:
+ abort ();
+ break;
+ }
+ continue;
+
+ case R23_TO_FR:
+ switch (i)
+ {
+ case ARG2:
+ NEW_INSTRUCTION (stub_entry, STWS_ARG2_M4SP)
+ NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP)
+ NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG3)
+ break;
+ default:
+ abort ();
+ break;
+ }
+ continue;
+
+ case FR_TO_R:
+ switch (i)
+ {
+ case ARG0:
+ NEW_INSTRUCTION (stub_entry, FSTWS_FARG0_M8SP)
+ NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0)
+ break;
+ case ARG1:
+ NEW_INSTRUCTION (stub_entry, FSTWS_FARG1_M8SP)
+ NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG1)
+ break;
+ case ARG2:
+ NEW_INSTRUCTION (stub_entry, FSTWS_FARG2_M8SP)
+ NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2)
+ break;
+ case ARG3:
+ NEW_INSTRUCTION (stub_entry, FSTWS_FARG3_M8SP)
+ NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG3)
+ break;
+ }
+ continue;
+
+ case FR_TO_R01:
+ switch (i)
+ {
+ case ARG0:
+ NEW_INSTRUCTION (stub_entry, FSTDS_FARG1_M8SP)
+ NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0)
+ NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG1)
+ break;
+ default:
+ abort ();
+ break;
+ }
+ continue;
+
+ case FR_TO_R23:
+ switch (i)
+ {
+ case ARG2:
+ NEW_INSTRUCTION (stub_entry, FSTDS_FARG3_M8SP)
+ NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2)
+ NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG3)
+ break;
+ default:
+ abort ();
+ break;
+ }
+ continue;
+
+ default:
+ abort ();
+ break;
+ }
+ }
+
+ /* Put the stack pointer back. FIXME: Is this still necessary? */
+ NEW_INSTRUCTION (stub_entry, ADDI_M8_SP_SP)
+ }
+
+ /* Common code again. Return pointer adjustment and the like. */
+ if (!dyncall)
{
- NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP);
+ /* This isn't dyncall. */
+ if (!milli)
+ {
+ /* It's not a millicode call, so get the correct return
+ value into %r2 (aka RP). */
+ if (rtn_adjust)
+ NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP)
+ else
+ NEW_INSTRUCTION (stub_entry, COPY_31_2)
+ }
+ else
+ {
+ /* It is a millicode call, so get the correct return
+ value into %r1?!?. FIXME: Shouldn't this be
+ %r31? Yes, and a little re-arrangement of the
+ code below would make that possible. */
+ if (rtn_adjust)
+ NEW_INSTRUCTION (stub_entry, ADDI_M4_31_1)
+ else
+ NEW_INSTRUCTION (stub_entry, COPY_31_1)
+ }
}
else
- NEW_INSTRUCTION (stub_entry, COPY_31_2);
+ {
+ /* This is dyncall, so the code is a little different as the
+ return pointer is already in %r2 (aka RP). */
+ if (rtn_adjust)
+ NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP)
+ }
/* Save the return address. */
- NEW_INSTRUCTION (stub_entry, STW_RP_M8SP);
+ if (linker_stub_type == HPPA_STUB_ARG_RELOC)
+ NEW_INSTRUCTION (stub_entry, STW_RP_M8SP)
/* Long branch to the target function. */
- NEW_INSTRUCTION (stub_entry, LDIL_XXX_31);
+ NEW_INSTRUCTION (stub_entry, LDIL_XXX_31)
hppa_elf_stub_reloc (stub_entry->stub_desc,
- abfd,
- target_sym,
+ abfd, target_sym,
CURRENT_STUB_OFFSET (stub_entry),
R_HPPA_L21);
- NEW_INSTRUCTION (stub_entry, BLE_XXX_0_31);
+ NEW_INSTRUCTION (stub_entry, BLE_XXX_0_31)
hppa_elf_stub_reloc (stub_entry->stub_desc,
- abfd,
- target_sym,
+ abfd, target_sym,
CURRENT_STUB_OFFSET (stub_entry),
R_HPPA_ABS_CALL_R17);
- NEW_INSTRUCTION (stub_entry, COPY_31_2);
-
- /* Restore the return address. */
- NEW_INSTRUCTION (stub_entry, LDW_M8SP_RP);
+ if (linker_stub_type == HPPA_STUB_ARG_RELOC)
+ {
+ /* In delay slot of long-call, copy %r31 into %r2 so that
+ the callee can return in the normal fashion. */
+ NEW_INSTRUCTION (stub_entry, COPY_31_2)
+
+ /* Restore the return address. */
+ NEW_INSTRUCTION (stub_entry, LDW_M8SP_RP)
- /* Generate the code to move the return value around. */
- i = RETVAL;
- if (stub_types[i] != NO_ARG_RELOC)
+ /* Generate the code to move the return value around. */
+ switch (stub_types[RETVAL])
+ {
+ case NO_ARG_RELOC:
+ break;
+
+ case R_TO_FR:
+ NEW_INSTRUCTION (stub_entry, STWS_RET0_M8SP)
+ NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FRET0)
+ break;
+
+ case FR_TO_R:
+ NEW_INSTRUCTION (stub_entry, FSTWS_FRET0_M8SP)
+ NEW_INSTRUCTION (stub_entry, LDWS_M4SP_RET0)
+ break;
+
+ default:
+ abort ();
+ break;
+ }
+
+ /* Return back to the main code stream. */
+ NEW_INSTRUCTION (stub_entry, BV_N_0_RP)
+ }
+ else
{
- switch (stub_types[i])
+ if (!dyncall)
{
- case R_TO_FR:
- NEW_INSTRUCTION (stub_entry, STWS_RET0_M8SP);
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FRET0);
- break;
-
- case FR_TO_R:
- NEW_INSTRUCTION (stub_entry, FSTWS_FRET0_M8SP);
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_RET0);
- break;
+ /* Get return address into %r31. Both variants may be necessary
+ (I think) as we could be cascading into another stub. */
+ if (!milli)
+ NEW_INSTRUCTION (stub_entry, COPY_2_31)
+ else
+ NEW_INSTRUCTION (stub_entry, COPY_1_31)
+ }
+ else
+ {
+ /* Get the return address into %r31 too. Might be necessary
+ (I think) as we could be cascading into another stub. */
+ NEW_INSTRUCTION (stub_entry, COPY_2_31)
}
+
+ /* No need for a return to the main stream. */
}
- NEW_INSTRUCTION (stub_entry, BV_N_0_RP);
}
-
return stub_sym;
}
-int
+/* Return nonzero if an argument relocation will be needed to call
+ the function (symbol in RELOC_ENTRY) assuming the caller has
+ argument relocation bugs CALLER_AR. */
+
+static int
hppa_elf_arg_reloc_needed_p (abfd, reloc_entry, stub_types, caller_ar)
bfd *abfd;
arelent *reloc_entry;
- int stub_types[5];
+ arg_reloc_type stub_types[5];
symext_entryS caller_ar;
{
- /* If the symbol is still undefined, there is */
- /* no way to know if a stub is required. */
-
- if (reloc_entry->sym_ptr_ptr[0] && reloc_entry->sym_ptr_ptr[0]->section != &bfd_und_section)
+ /* If the symbol is still undefined, then it's impossible to know
+ if an argument relocation is needed. */
+ if (reloc_entry->sym_ptr_ptr[0]
+ && reloc_entry->sym_ptr_ptr[0]->section != &bfd_und_section)
{
symext_entryS callee_ar = elf32_hppa_get_sym_extn (abfd,
reloc_entry->sym_ptr_ptr[0],
HPPA_SXT_ARG_RELOC);
- /* Now, determine if a stub is */
- /* required. A stub is required if they the callee and caller */
- /* argument relocation bits are both nonzero and not equal. */
-
+ /* Now examine all the argument and return value location
+ information to determine if a relocation stub will be needed. */
if (caller_ar && callee_ar)
{
- /* Both are non-zero, we need to do further checking. */
- /* First, check if there is a return value relocation to be done */
- int caller_loc[5];
- int callee_loc[5];
+ arg_location caller_loc[5];
+ arg_location callee_loc[5];
+ /* Extract the location information for the return value
+ and argument registers separately. */
callee_loc[RETVAL] = EXTRACT_ARBITS (callee_ar, RETVAL);
caller_loc[RETVAL] = EXTRACT_ARBITS (caller_ar, RETVAL);
callee_loc[ARG0] = EXTRACT_ARBITS (callee_ar, ARG0);
callee_loc[ARG3] = EXTRACT_ARBITS (callee_ar, ARG3);
caller_loc[ARG3] = EXTRACT_ARBITS (caller_ar, ARG3);
- /* Check some special combinations. For */
- /* example, if FU appears in ARG1 or ARG3, we */
- /* can move it to ARG0 or ARG2, respectively. */
+ /* Check some special combinations. For example, if FU
+ appears in ARG1 or ARG3, we can move it to ARG0 or ARG2,
+ respectively. (I guess this braindamage is correct? It'd
+ take an hour or two of reading PA calling conventions to
+ really know). */
if (caller_loc[ARG0] == AR_FU || caller_loc[ARG1] == AR_FU)
{
callee_loc[ARG3] = AR_NO;
}
- stub_types[ARG0] = type_of_mismatch (caller_loc[ARG0], callee_loc[ARG0], ARGUMENTS);
- stub_types[ARG1] = type_of_mismatch (caller_loc[ARG1], callee_loc[ARG1], ARGUMENTS);
- stub_types[ARG2] = type_of_mismatch (caller_loc[ARG2], callee_loc[ARG2], ARGUMENTS);
- stub_types[ARG3] = type_of_mismatch (caller_loc[ARG3], callee_loc[ARG3], ARGUMENTS);
- stub_types[RETVAL] = type_of_mismatch (caller_loc[RETVAL], callee_loc[RETVAL], RETURN_VALUE);
-
- /* Steps involved in building stubs: */
- /* 1. Determine what argument registers need to relocated. This */
- /* step is already done here. */
- /* 2. Build the appropriate stub in the .hppa_linker_stubs section. */
- /* This section should never appear in an object file. It is */
- /* only used internally. The output_section of the */
- /* .hppa_linker_stubs section is the .text section of the */
- /* executable. */
- /* 3. Build a symbol that is used (internally only) as the entry */
- /* point of the stub. */
- /* 4. Change the instruction of the original branch into a branch to */
- /* the stub routine. */
- /* 5. Build a relocation entry for the instruction of the original */
- /* branch to be R_HPPA_PCREL_CALL to the stub routine. */
-
-
- if (stub_types[0]
- || stub_types[1]
- || stub_types[2]
- || stub_types[3]
- || stub_types[4])
- {
-#ifdef DETECT_STUBS
- int i;
-
- fprintf (stderr, "Stub needed for %s @ %s+0x%x: callee/caller ar=0x%x/0x%x ",
- reloc_entry->sym_ptr_ptr[0]->name,
- abfd->filename, reloc_entry->address,
- callee_ar, caller_ar);
- for (i = ARG0; i < RETVAL; i++)
- {
- if (stub_types[i] != NO_ARG_RELOC)
- {
- fprintf (stderr, "%s%d: %s ",
- i == RETVAL ? "ret" : "arg",
- i == RETVAL ? 0 : i,
- reloc_type_strings[stub_types[i]]);
- }
- }
- fprintf (stderr, "\n");
-#endif
- return 1;
- }
-
+ /* Now look up potential mismatches. */
+ stub_types[ARG0] = type_of_mismatch (caller_loc[ARG0],
+ callee_loc[ARG0],
+ ARGUMENTS);
+ stub_types[ARG1] = type_of_mismatch (caller_loc[ARG1],
+ callee_loc[ARG1],
+ ARGUMENTS);
+ stub_types[ARG2] = type_of_mismatch (caller_loc[ARG2],
+ callee_loc[ARG2],
+ ARGUMENTS);
+ stub_types[ARG3] = type_of_mismatch (caller_loc[ARG3],
+ callee_loc[ARG3],
+ ARGUMENTS);
+ stub_types[RETVAL] = type_of_mismatch (caller_loc[RETVAL],
+ callee_loc[RETVAL],
+ RETURN_VALUE);
+
+ /* If any of the arguments or return value need an argument
+ relocation, then we will need an argument relocation stub. */
+ if (stub_types[ARG0] != NO_ARG_RELOC
+ || stub_types[ARG1] != NO_ARG_RELOC
+ || stub_types[ARG2] != NO_ARG_RELOC
+ || stub_types[ARG3] != NO_ARG_RELOC
+ || stub_types[RETVAL] != NO_ARG_RELOC)
+ return 1;
}
}
return 0;
}
-asymbol *
-hppa_elf_build_long_branch_stub (abfd, output_bfd, link_info, reloc_entry,
- symbol, data)
+/* Create the linker stub section. */
+
+static void
+hppa_elf_create_stub_sec (abfd, output_bfd, secptr, link_info)
bfd *abfd;
bfd *output_bfd;
+ asection **secptr;
struct bfd_link_info *link_info;
- arelent *reloc_entry;
- asymbol *symbol;
- unsigned *data;
{
- asection *stub_sec = bfd_get_section_by_name (abfd, ".hppa_linker_stubs");
- elf32_hppa_stub_description *stub_desc = find_stubs (abfd, stub_sec);
- asymbol *stub_sym = NULL;
- asymbol *target_sym = reloc_entry->sym_ptr_ptr[0];
- asection *output_text_section = bfd_get_section_by_name (output_bfd, ".text");
- char stub_sym_name[128];
- int milli = false;
- int dyncall = false;
- elf32_hppa_stub_name_list *stub_entry;
- int rtn_adjust = true;
- int rtn_reg;
- unsigned insn;
-
- /* Create the stub section if it does not already exist. */
- if (!stub_sec)
- {
- BFD_ASSERT (stub_desc == NULL);
- stub_sec = bfd_make_section (abfd, ".hppa_linker_stubs");
- bfd_set_section_flags (abfd,
- stub_sec,
- SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
- | SEC_RELOC | SEC_CODE | SEC_READONLY);
- stub_sec->output_section = output_text_section->output_section;
- stub_sec->output_offset = 0;
-
- /* Set up the ELF section header for this new section. This
- is basically the same processing as elf_make_sections().
- elf_make_sections is static and therefore not accessable
- here. */
+ asection *output_text_section;
+
+ output_text_section = bfd_get_section_by_name (output_bfd, ".text");
+ *secptr = bfd_make_section (abfd, ".hppa_linker_stubs");
+ bfd_set_section_flags (abfd, *secptr,
+ SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
+ | SEC_RELOC | SEC_CODE | SEC_READONLY);
+ (*secptr)->output_section = output_text_section->output_section;
+ (*secptr)->output_offset = 0;
+
+ /* Set up the ELF section header for this new section. This
+ is basically the same processing as elf_make_sections().
+ elf_make_sections is static and therefore not accessable
+ here. */
+ {
+ Elf_Internal_Shdr *this_hdr;
+ this_hdr = &elf_section_data ((*secptr))->this_hdr;
+
+ /* Set the sizes of this section. The contents have already
+ been set up ?!? */
+ this_hdr->sh_addr = (*secptr)->vma;
+ this_hdr->sh_size = (*secptr)->_raw_size;
+
+ /* Set appropriate flags for sections with relocations. */
+ if ((*secptr)->flags & SEC_RELOC)
{
- Elf_Internal_Shdr *this_hdr;
- this_hdr = &elf_section_data (stub_sec)->this_hdr;
+ Elf_Internal_Shdr *rela_hdr;
+ int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
- /* Set the sizes of this section. The contents have already
- been set up ?!? */
- this_hdr->sh_addr = stub_sec->vma;
- this_hdr->sh_size = stub_sec->_raw_size;
+ rela_hdr = &elf_section_data ((*secptr))->rel_hdr;
- /* Set appropriate flags for sections with relocations. */
- if (stub_sec->flags & SEC_RELOC)
+ if (use_rela_p)
{
- Elf_Internal_Shdr *rela_hdr;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- rela_hdr = &elf_section_data (stub_sec)->rel_hdr;
-
- if (use_rela_p)
- {
- rela_hdr->sh_type = SHT_RELA;
- rela_hdr->sh_entsize = sizeof (Elf32_External_Rela);
- }
- else
- {
- rela_hdr->sh_type = SHT_REL;
- rela_hdr->sh_entsize = sizeof (Elf32_External_Rel);
- }
- rela_hdr->sh_flags = 0;
- rela_hdr->sh_addr = 0;
- rela_hdr->sh_offset = 0;
- rela_hdr->sh_addralign = 0;
- rela_hdr->size = 0;
+ rela_hdr->sh_type = SHT_RELA;
+ rela_hdr->sh_entsize = sizeof (Elf32_External_Rela);
}
-
- if (stub_sec->flags & SEC_ALLOC)
+ else
{
- this_hdr->sh_flags |= SHF_ALLOC;
- /* FIXME. If SEC_LOAD is true should we do something with
- with sh_type? */
+ rela_hdr->sh_type = SHT_REL;
+ rela_hdr->sh_entsize = sizeof (Elf32_External_Rel);
}
-
- if (!(stub_sec->flags & SEC_READONLY))
- this_hdr->sh_flags |= SHF_WRITE;
-
- if (stub_sec->flags & SEC_CODE)
- this_hdr->sh_flags |= SHF_EXECINSTR;
+ rela_hdr->sh_flags = 0;
+ rela_hdr->sh_addr = 0;
+ rela_hdr->sh_offset = 0;
+ rela_hdr->sh_addralign = 0;
+ rela_hdr->size = 0;
}
-
- bfd_set_section_alignment (abfd, stub_sec, 2);
- stub_desc = new_stub (abfd, stub_sec, link_info);
- }
-
- if (!stub_desc)
- stub_desc = new_stub (abfd, stub_sec, link_info);
-
- /* Allocate memory to contain the stub. FIXME. Why isn't this using
- the BFD memory allocation routines? */
- if (!stub_desc->stub_contents)
- {
- stub_desc->allocated_size = STUB_BUFFER_INCR;
- stub_desc->stub_contents = (char *) malloc (STUB_BUFFER_INCR);
- }
- else if ((stub_desc->allocated_size - stub_desc->real_size) < STUB_MAX_SIZE)
- {
- stub_desc->allocated_size = stub_desc->allocated_size + STUB_BUFFER_INCR;
- stub_desc->stub_contents = (char *) realloc (stub_desc->stub_contents,
- stub_desc->allocated_size);
- }
-
- stub_desc->stub_secp
- = (int *) (stub_desc->stub_contents + stub_desc->real_size);
-
- /* Is this a millicode call? If so, the return address
- comes in on r31 rather than r2 (rp) so a slightly
- different code sequence is needed. */
-
- insn = data[0];
- rtn_reg = (insn & 0x03e00000) >> 21;
- if (rtn_reg == 31)
- milli = true;
-
- if (strcmp (symbol->name, "$$dyncall") == 0)
- dyncall = true;
-
- /* If we are creating a call from a stub to another stub, then
- never do the instruction reordering. We can tell if we are
- going to be calling one stub from another by the fact that
- the symbol name has '_stub_' (arg. reloc. stub) or '_lb_stub_'
- prepended to the name. Alternatively, the section of the
- symbol will be '.hppa_linker_stubs'. */
-
- if ((strncmp (symbol->name, "_stub_", 6) == 0)
- || (strncmp (symbol->name, "_lb_stub_", 9) == 0))
- {
- BFD_ASSERT (strcmp (symbol->section->name, ".hppa_linker_stubs") == 0);
- rtn_adjust = false;
- }
-
- /* Check to see if we modify the return pointer
- in the delay slot of the branch. */
- {
- unsigned delay_insn = data[1];
- /* If we nullify the delay slot, or if the delay slot contains an
- instruction that modifies the return pointer, then no additional
- modification of the return pointer is necessary. */
- if (insn & 2 || insn == 0)
- rtn_adjust = false;
- else
- {
- if (get_opcode (delay_insn) == LDO
- && (((delay_insn & 0x001f0000) >> 16) == rtn_reg))
- rtn_adjust = false;
- if (milli)
- rtn_adjust = false;
- }
+ if ((*secptr)->flags & SEC_ALLOC)
+ this_hdr->sh_flags |= SHF_ALLOC;
+
+ if (!((*secptr)->flags & SEC_READONLY))
+ this_hdr->sh_flags |= SHF_WRITE;
+
+ if ((*secptr)->flags & SEC_CODE)
+ this_hdr->sh_flags |= SHF_EXECINSTR;
}
- sprintf (stub_sym_name,
- "_lb_stub_%s_%s", reloc_entry->sym_ptr_ptr[0]->name,
- rtn_adjust ? "RA" : "");
- stub_entry = find_stub_by_name(abfd, stub_sec, stub_sym_name);
-
- /* If a copy of this stub already exists re-use it. */
- if (stub_entry)
- {
- stub_sym = stub_entry->sym;
-
- /* Change symbol associated with the original relocation to point
- to the stub.
-
- FIXME. Is there a need to change the relocation type too? */
- reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (stub_desc->this_bfd,
- sizeof (asymbol *));
- if (!reloc_entry->sym_ptr_ptr)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- reloc_entry->sym_ptr_ptr[0] = stub_sym;
- reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_HPPA_STUB_CALL_17);
- }
- else
- {
- /* We will need to allocate a new stub. */
- stub_sym = bfd_make_empty_symbol (abfd);
- if (!stub_sym)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- stub_sym->name = bfd_zalloc (abfd, strlen (stub_sym_name) + 1);
- if (!stub_sym->name)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- strcpy ((char *) stub_sym->name, stub_sym_name);
- stub_sym->value
- = (char *) stub_desc->stub_secp - (char *) stub_desc->stub_contents;
- stub_sym->section = stub_sec;
- stub_sym->flags = BSF_LOCAL | BSF_FUNCTION;
- stub_entry = add_stub_by_name (abfd, stub_sec, stub_sym, link_info);
-
- /* Change symbol associated with the original relocation to point
- to the stub.
-
- FIXME. Is there a need to change the relocation type too? */
- reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (stub_desc->this_bfd,
- sizeof (asymbol *));
- if (!reloc_entry->sym_ptr_ptr)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- reloc_entry->sym_ptr_ptr[0] = stub_sym;
- reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_HPPA_STUB_CALL_17);
-
- /* Build the stub. */
-
- /* 1. initialization for the call. */
- NEW_INSTRUCTION (stub_entry, LDSID_31_1);
- NEW_INSTRUCTION (stub_entry, MTSP_1_SR0);
-
- if (!dyncall)
- {
- if (!milli)
- {
- if (rtn_adjust)
- {
- NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP);
- }
- else
- {
- NEW_INSTRUCTION (stub_entry, COPY_31_2);
- }
- }
- else
- {
- if (rtn_adjust)
- {
- NEW_INSTRUCTION (stub_entry, ADDI_M4_31_1);
- }
- else
- {
- NEW_INSTRUCTION (stub_entry, COPY_31_1);
- }
- }
-
- NEW_INSTRUCTION (stub_entry, LDIL_XXX_31);
- hppa_elf_stub_reloc (stub_desc,
- abfd,
- target_sym,
- CURRENT_STUB_OFFSET (stub_entry),
- R_HPPA_L21);
-
- /* 2. Make the call. */
- if (!milli)
- {
- NEW_INSTRUCTION (stub_entry, BE_XXX_0_31);
- hppa_elf_stub_reloc (stub_desc,
- abfd,
- target_sym,
- CURRENT_STUB_OFFSET (stub_entry),
- R_HPPA_ABS_CALL_R17);
- NEW_INSTRUCTION (stub_entry, COPY_2_31);
- }
- else
- {
- NEW_INSTRUCTION (stub_entry, BE_XXX_0_31);
- hppa_elf_stub_reloc (stub_desc,
- abfd,
- target_sym,
- CURRENT_STUB_OFFSET (stub_entry),
- R_HPPA_ABS_CALL_R17);
- NEW_INSTRUCTION (stub_entry, COPY_1_31);
- }
- }
- else
- {
- /* 3. Branch back to the original location.
- (For non-millicode calls, this is accomplished with the
- COPY_31_2 instruction. For millicode calls, the return
- location is already in r2.) */
- if (rtn_adjust)
- {
- NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP);
- }
- NEW_INSTRUCTION (stub_entry, LDIL_XXX_31);
- hppa_elf_stub_reloc (stub_desc,
- abfd,
- target_sym,
- CURRENT_STUB_OFFSET (stub_entry),
- R_HPPA_L21);
-
- NEW_INSTRUCTION (stub_entry, BE_XXX_0_31);
- hppa_elf_stub_reloc (stub_desc,
- abfd,
- target_sym,
- CURRENT_STUB_OFFSET (stub_entry),
- R_HPPA_ABS_CALL_R17);
- NEW_INSTRUCTION (stub_entry, COPY_2_31);
- }
- }
- return stub_sym;
+ bfd_set_section_alignment (abfd, *secptr, 2);
}
-int
+/* Return nonzero if a long-call stub will be needed to call the
+ function (symbol in RELOC_ENTRY). */
+
+static int
hppa_elf_long_branch_needed_p (abfd, asec, reloc_entry, symbol, insn)
bfd *abfd;
asection *asec;
asymbol *symbol;
unsigned insn;
{
- long sym_value = get_symbol_value(symbol);
+ long sym_value = get_symbol_value (symbol);
int fmt = reloc_entry->howto->bitsize;
- unsigned char op = get_opcode(insn);
+ unsigned char op = get_opcode (insn);
unsigned raddr;
-#define too_far(val,num_bits) ((int)(val) > (1<<(num_bits))-1) || ((int)(val) < (-1<<(num_bits)))
+#define too_far(val,num_bits) \
+ ((int)(val) > (1 << (num_bits)) - 1) || ((int)(val) < (-1 << (num_bits)))
switch (op)
{
case BL:
raddr =
reloc_entry->address + asec->output_offset + asec->output_section->vma;
- if (too_far(sym_value - raddr,fmt+1))
- {
-#ifdef DETECT_STUBS
- fprintf(stderr,"long_branch needed on BL insn: abfd=%s,sym=%s,distance=0x%x\n",abfd->filename,symbol->name,sym_value - reloc_entry->address);
-#endif
+ /* If the symbol and raddr (relocated addr?) are too far away from
+ each other, then a long-call stub will be needed. */
+ if (too_far (sym_value - raddr, fmt + 1))
return 1;
- }
break;
}
return 0;
}
-#define STUB_SYM_BUFFER_INC 5
+/* Search the given section and determine if linker stubs will be
+ needed for any calls within that section.
+
+ Return any new stub symbols created.
+ Used out of hppaelf.em in the linker. */
+
asymbol *
hppa_look_for_stubs_in_section (stub_bfd, abfd, output_bfd, asec,
syms, new_sym_cnt, link_info)
struct bfd_link_info *link_info;
{
int i;
- int stub_types[5];
- asymbol *new_syms = (asymbol *) NULL;
+ arg_reloc_type stub_types[5];
+ asymbol *new_syms = NULL;
int new_cnt = 0;
int new_max = 0;
/* Relocations are in different places depending on whether this is
an output section or an input section. Also, the relocations are
- in different forms. Sigh. Luckily, we have
- bfd_canonicalize_reloc() to straighten this out for us . */
-
+ in different forms. Sigh. Luckily, we have bfd_canonicalize_reloc()
+ to straighten this out for us . */
if (asec->reloc_count > 0)
{
arelent **reloc_vector
= (arelent **) alloca (asec->reloc_count * (sizeof (arelent *) + 1));
bfd_canonicalize_reloc (abfd, asec, reloc_vector, syms);
+
+ /* Examine each relocation entry in this section. */
for (i = 0; i < asec->reloc_count; i++)
{
arelent *rle = reloc_vector[i];
switch (rle->howto->type)
{
+ /* Any call could need argument relocation stubs, and
+ some may need long-call stubs. */
case R_HPPA_ABS_CALL_11:
case R_HPPA_ABS_CALL_14:
case R_HPPA_ABS_CALL_17:
= (symext_entryS) HPPA_R_ARG_RELOC (rle->addend);
unsigned insn[2];
+ /* We'll need this for the long-call checks. */
bfd_get_section_contents (abfd, asec, insn, rle->address,
sizeof(insn));
+
+ /* See if this call needs an argument relocation stub. */
if (hppa_elf_arg_reloc_needed_p (abfd, rle, stub_types,
caller_ar))
{
new_max += STUB_SYM_BUFFER_INC;
new_syms = (asymbol *)
realloc (new_syms, new_max * sizeof (asymbol));
+ if (new_syms == NULL)
+ abort ();
}
- /* The rtn_adjust argument is true here because we
- know that we have a branch and (with a few exceptions
- detailed under the relocation code for relocation type
- R_HPPA_STUB_CALL_17) it will be possible to perform
- the code reorientation. */
- r = hppa_elf_build_arg_reloc_stub (stub_bfd, output_bfd,
- link_info, rle,
- stub_types,
- true, insn);
+ /* Build the argument relocation stub. */
+ r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
+ link_info, rle,
+ stub_types, true, insn,
+ HPPA_STUB_ARG_RELOC);
new_syms[new_cnt++] = *r;
}
- /* We need to retrieve the section contents to check for
- long branch stubs. */
+ /* See if this call needs a long-call stub. */
if (hppa_elf_long_branch_needed_p (abfd, asec, rle,
rle->sym_ptr_ptr[0],
insn[0]))
new_max += STUB_SYM_BUFFER_INC;
new_syms = (asymbol *)
realloc (new_syms, (new_max * sizeof (asymbol)));
+ if (! new_syms)
+ abort ();
}
- r = hppa_elf_build_long_branch_stub (stub_bfd, output_bfd,
- link_info, rle,
- rle->sym_ptr_ptr[0],
- insn);
+
+ /* Build the long-call stub. */
+ r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
+ link_info, rle,
+ NULL, true, insn,
+ HPPA_STUB_LONG_CALL);
new_syms[new_cnt++] = *r;
}
}
break;
+ /* PLABELs may need argument relocation stubs. */
case R_HPPA_PLABEL_32:
case R_HPPA_PLABEL_11:
case R_HPPA_PLABEL_14:
case R_HPPA_PLABEL_R14:
{
/* On a plabel relocation, assume the arguments of the
- caller are set up in general registers.
- NOTE: 0x155 = ARGW0=CR,ARGW1=GR,ARGW2=GR,RETVAL=GR */
+ caller are set up in general registers (indirect
+ calls only use general registers.
+ NOTE: 0x155 = ARGW0=GR,ARGW1=GR,ARGW2=GR,RETVAL=GR. */
symext_entryS caller_ar = (symext_entryS) 0x155;
unsigned insn[2];
+ /* Do we really need this? */
bfd_get_section_contents (abfd, asec, insn, rle->address,
sizeof(insn));
+ /* See if this call needs an argument relocation stub. */
if (hppa_elf_arg_reloc_needed_p (abfd, rle, stub_types,
caller_ar))
{
(see the relocation code for relocation type
R_HPPA_STUB_CALL_17) is possible. Basically,
determine whether we are looking at a branch or not. */
-
if (rle->howto->type == R_HPPA_PLABEL_32)
rtn_adjust = false;
else
rtn_adjust = false;
}
}
- r = hppa_elf_build_arg_reloc_stub (stub_bfd, output_bfd,
- link_info, rle,
- stub_types,
- rtn_adjust, insn);
+
+ /* Build the argument relocation stub. */
+ r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
+ link_info, rle, stub_types,
+ rtn_adjust, insn,
+ HPPA_STUB_ARG_RELOC);
new_syms[new_cnt++] = *r;
}
}
default:
break;
-
}
}
}
+
+ /* Return the new symbols and update the counters. */
*new_sym_cnt = new_cnt;
return new_syms;
}
+/* Set the contents of a particular section at a particular location. */
-char *linker_stubs = NULL;
-int linker_stubs_size = 0;
-int linker_stubs_max_size = 0;
-#define STUB_ALLOC_INCR 100
-
-boolean
+static boolean
hppa_elf_set_section_contents (abfd, section, location, offset, count)
bfd *abfd;
sec_ptr section;
file_ptr offset;
bfd_size_type count;
{
- if (strcmp(section->name, ".hppa_linker_stubs") == 0)
+ /* Linker stubs are handled a little differently. */
+ if (! strcmp (section->name, ".hppa_linker_stubs"))
{
if (linker_stubs_max_size < offset + count)
{
linker_stubs_max_size = offset + count + STUB_ALLOC_INCR;
- linker_stubs = (char *)realloc(linker_stubs, linker_stubs_max_size);
+ linker_stubs = (char *)realloc (linker_stubs, linker_stubs_max_size);
+ if (! linker_stubs)
+ abort ();
}
if (offset + count > linker_stubs_size)
linker_stubs_size = offset + count;
- memcpy(linker_stubs + offset,location,count);
+ /* Set the contents. */
+ memcpy(linker_stubs + offset, location, count);
return (true);
}
else
+ /* For everything but the linker stub section, use the generic
+ code. */
return bfd_elf32_set_section_contents (abfd, section, location,
offset, count);
}
{
int i;
int *symtab_map =
- (int *) elf_sym_extra(section->output_section->owner);
+ (int *) elf_sym_extra (section->output_section->owner);
for (i = 0; i < section->output_section->owner->symcount; i++)
{
- elf_hppa_tc_symbol(section->output_section->owner,
- ((elf_symbol_type *)
- section->output_section->owner->outsymbols[i]),
- symtab_map[i], &symext_rootP, &symext_lastP);
+ elf_hppa_tc_symbol (section->output_section->owner,
+ ((elf_symbol_type *)
+ section->output_section->owner->outsymbols[i]),
+ symtab_map[i], &symext_rootP, &symext_lastP);
}
symext_chain_built++;
elf_hppa_tc_make_sections (section->output_section->owner,
return (false);
memcpy (location,
- ((char *)symextn_contents + section->output_offset + offset),
+ (char *)symextn_contents + section->output_offset + offset,
count);
return (true);
}
else
+ /* It's not the symbol extension or linker stub sections, use
+ the generic routines. */
return bfd_generic_get_section_contents (abfd, section, location,
offset, count);
}
+/* Translate from an elf into field into a howto relocation pointer. */
+
static void
elf_info_to_howto (abfd, cache_ptr, dst)
bfd *abfd;
Elf32_Internal_Rela *dst;
{
BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_HPPA_UNIMPLEMENTED);
- cache_ptr->howto = &elf_hppa_howto_table[ELF32_R_TYPE(dst->r_info)];
+ cache_ptr->howto = &elf_hppa_howto_table[ELF32_R_TYPE (dst->r_info)];
}
+/* Do PA ELF specific processing for symbols. Needed to find the
+ value of $global$. */
+
static void
elf32_hppa_backend_symbol_processing (abfd, sym)
bfd *abfd;
{
/* Is this a definition of $global$? If so, keep it because it will be
needed if any relocations are performed. */
-
if (!strcmp (sym->name, "$global$")
&& sym->section != &bfd_und_section)
{
}
}
-#define elf_backend_symbol_processing elf32_hppa_backend_symbol_processing
-
-struct elf32_hppa_symextn_map_struct
-{
- int old_index;
- bfd *bfd;
- asymbol *sym;
- int new_index;
-};
-
-static struct elf32_hppa_symextn_map_struct *elf32_hppa_symextn_map;
-static int elf32_hppa_symextn_map_size;
-
+/* Do some PA ELF specific work after reading in the symbol table.
+ In particular attach the argument relocation from the
+ symbol extension section to the appropriate symbols. */
static boolean
elf32_hppa_backend_symbol_table_processing (abfd, esyms,symcnt)
bfd *abfd;
elf_symbol_type *esyms;
int symcnt;
{
- Elf32_Internal_Shdr *symextn_hdr = bfd_elf_find_section (abfd, SYMEXTN_SECTION_NAME);
- int i;
- int current_sym_idx = 0;
-
- /* If the symbol extension section does not exist, all the symbol */
- /* all the symbol extension information is assumed to be zero. */
+ Elf32_Internal_Shdr *symextn_hdr =
+ bfd_elf_find_section (abfd, SYMEXTN_SECTION_NAME);
+ int i, current_sym_idx = 0;
+ /* If no symbol extension existed, then all symbol extension information
+ is assumed to be zero. */
if (symextn_hdr == NULL)
{
for (i = 0; i < symcnt; i++)
- {
- esyms[i].tc_data.hppa_arg_reloc = 0;
- }
+ esyms[i].tc_data.hppa_arg_reloc = 0;
return (true);
}
- /* allocate a buffer of the appropriate size for the symextn section */
-
+ /* Allocate a buffer of the appropriate size for the symextn section. */
symextn_hdr->contents = bfd_zalloc(abfd,symextn_hdr->sh_size);
if (!symextn_hdr->contents)
{
}
symextn_hdr->size = symextn_hdr->sh_size;
- /* read in the symextn section */
-
+ /* Read in the symextn section. */
if (bfd_seek (abfd, symextn_hdr->sh_offset, SEEK_SET) == -1)
{
bfd_set_error (bfd_error_system_call);
if (bfd_read ((PTR) symextn_hdr->contents, 1, symextn_hdr->size, abfd)
!= symextn_hdr->size)
{
- free ((PTR)symextn_hdr->contents);
bfd_set_error (bfd_error_system_call);
return (false);
}
- /* parse the entries, updating the symtab entries as we go */
-
+ /* Parse entries in the symbol extension section, updating the symtab
+ entries as we go */
for (i = 0; i < symextn_hdr->size / sizeof(symext_entryS); i++)
{
symext_entryS *seP = ((symext_entryS *)symextn_hdr->contents) + i;
- int se_value = ELF32_HPPA_SX_VAL(*seP);
- int se_type = ELF32_HPPA_SX_TYPE(*seP);
+ int se_value = ELF32_HPPA_SX_VAL (*seP);
+ int se_type = ELF32_HPPA_SX_TYPE (*seP);
switch (se_type)
{
if (se_value >= symcnt)
{
bfd_set_error (bfd_error_bad_value);
- bfd_perror("elf32_hppa_backend_symbol_table_processing -- symbol index");
return (false);
}
current_sym_idx = se_value - 1;
default:
bfd_set_error (bfd_error_bad_value);
- bfd_perror("elf32_hppa_backend_symbol_table_processing");
return (false);
}
}
return (true);
}
-#define elf_backend_symbol_table_processing elf32_hppa_backend_symbol_table_processing
+/* Perform on PA ELF specific processing once a section has been
+ read in. In particular keep the symbol indexes correct for
+ the symbol extension information. */
static boolean
elf32_hppa_backend_section_processing (abfd, secthdr)
bfd *abfd;
Elf32_Internal_Shdr *secthdr;
{
- int i,j,k;
+ int i, j, k;
if (secthdr->sh_type == SHT_HPPA_SYMEXTN)
{
- for (i = 0; i < secthdr->size / sizeof(symext_entryS); i++)
+ for (i = 0; i < secthdr->size / sizeof (symext_entryS); i++)
{
symext_entryS *seP = ((symext_entryS *)secthdr->contents) + i;
- int se_value = ELF32_HPPA_SX_VAL(*seP);
- int se_type = ELF32_HPPA_SX_TYPE(*seP);
+ int se_value = ELF32_HPPA_SX_VAL (*seP);
+ int se_type = ELF32_HPPA_SX_TYPE (*seP);
switch (se_type)
{
case HPPA_SXT_SYMNDX:
for (j = 0; j < abfd->symcount; j++)
{
- /* locate the map entry for this symbol, if there is one. */
- /* modify the symbol extension section symbol index entry */
- /* to reflect the new symbol table index */
-
+ /* Locate the map entry for this symbol and modify the
+ symbol extension section symbol index entry to reflect
+ the new symbol table index. */
for (k = 0; k < elf32_hppa_symextn_map_size; k++)
{
if (elf32_hppa_symextn_map[k].old_index == se_value
- && elf32_hppa_symextn_map[k].bfd == abfd->outsymbols[j]->the_bfd
- && elf32_hppa_symextn_map[k].sym == abfd->outsymbols[j])
+ && elf32_hppa_symextn_map[k].bfd
+ == abfd->outsymbols[j]->the_bfd
+ && elf32_hppa_symextn_map[k].sym
+ == abfd->outsymbols[j])
{
bfd_put_32(abfd,
ELF32_HPPA_SX_WORD (HPPA_SXT_SYMNDX, j),
default:
bfd_set_error (bfd_error_bad_value);
- bfd_perror("elf32_hppa_backend_section_processing");
return (false);
}
}
return true;
}
-#define elf_backend_section_processing elf32_hppa_backend_section_processing
+/* What does this really do? Just determine if there is an appropriate
+ mapping from ELF section headers to backend sections? More symbol
+ extension braindamage. */
static boolean
elf32_hppa_backend_section_from_shdr (abfd, hdr, name)
if (hdr->sh_type == SHT_HPPA_SYMEXTN)
{
- BFD_ASSERT (strcmp(name,".hppa_symextn") == 0);
+ BFD_ASSERT (strcmp (name, ".hppa_symextn") == 0);
- /* Bits that get saved. This one is real. */
+ /* Bits that get saved. This one is real. */
if (!hdr->rawdata)
{
newsect = bfd_make_section (abfd, name);
{
newsect->vma = hdr->sh_addr;
newsect->_raw_size = hdr->sh_size;
- newsect->filepos = hdr->sh_offset; /* so we can read back the bits */
+ newsect->filepos = hdr->sh_offset;
newsect->flags |= SEC_HAS_CONTENTS;
newsect->alignment_power = hdr->sh_addralign;
newsect->flags |= SEC_READONLY;
if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
+ newsect->flags |= SEC_CODE;
else
newsect->flags |= SEC_DATA;
return false;
}
-#define elf_backend_section_from_shdr elf32_hppa_backend_section_from_shdr
+/* Return true if the given section is a fake section. */
static boolean
elf32_hppa_backend_fake_sections (abfd, secthdr, asect)
return false;
}
-#define elf_backend_fake_sections elf32_hppa_backend_fake_sections
+/* Return true if there is a mapping from bfd section into a
+ backend section. */
static boolean
-elf32_hppa_backend_section_from_bfd_section (abfd, hdr, asect, retval)
+elf32_hppa_backend_section_from_bfd_section (abfd, hdr, asect, ignored)
bfd *abfd;
Elf32_Internal_Shdr *hdr;
asection *asect;
- int *retval;
+ int *ignored;
{
if (hdr->sh_type == SHT_HPPA_SYMEXTN)
{
{
if (((struct sec *) (hdr->rawdata)) == asect)
{
- BFD_ASSERT (strcmp(asect->name, ".hppa_symextn") == 0);
+ BFD_ASSERT (strcmp (asect->name, ".hppa_symextn") == 0);
return true;
}
}
#define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
#define elf_backend_section_from_bfd_section elf32_hppa_backend_section_from_bfd_section
+#define elf_backend_symbol_processing elf32_hppa_backend_symbol_processing
+#define elf_backend_symbol_table_processing elf32_hppa_backend_symbol_table_processing
+
#define bfd_generic_get_section_contents hppa_elf_get_section_contents
#define bfd_elf32_set_section_contents hppa_elf_set_section_contents
+#define elf_backend_section_processing elf32_hppa_backend_section_processing
+
+#define elf_backend_section_from_shdr elf32_hppa_backend_section_from_shdr
+#define elf_backend_fake_sections elf32_hppa_backend_fake_sections
+
#define TARGET_BIG_SYM bfd_elf32_hppa_vec
#define TARGET_BIG_NAME "elf32-hppa"
#define ELF_ARCH bfd_arch_hppa
projects / binutils-gdb.git / commitdiff