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mainly link-relax changes

This commit is contained in:
Ken Raeburn 1992-08-19 14:42:21 +00:00
parent 305c1e74c3
commit 09952cd955
6 changed files with 206 additions and 102 deletions
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29
gas/ChangeLog
View File

@ -1,3 +1,32 @@
Wed Aug 19 09:25:09 1992 Ken Raeburn (raeburn@cygnus.com)
* as.h (enum _relax_state): Start off at one, not zero, to better
catch uninitialized-variable errors.
(linkrelax): Declare new variable.
* messages.c (warning_count, error_count): Default initializer is
sufficient.
* write.c: Merged some declarations, using PARMS macro.
(text_frag_root, data_frag_root, bss_frag_root, text_last_frag,
data_last_frag): No longer static.
(write_object_file, case rs_align or rs_org): If HANDLE_ALIGN is
defined, call it. Change segments before calling fixup_segment.
(relax_align): If linkrelax, provide extra padding.
* obj-bout.c (obj_emit_relocations): Emit alignment relocs despite
their not having symbols associated.
* tc-i960.c (norelax, instrument_branches): Default initializer is
sufficient.
(linkrelax): Delete variable definition.
(mem_fmt): Call fix_new with NO_RELOC.
(tc_bout_fix_to_chars): Handle alignment relocs.
(i960_handle_align): New function.
* tc-i960.h (linkrelax): Delete declaration.
(HANDLE_ALIGN): New macro; calls i960_handle_align.
(NEED_FX_R_TYPE, NO_RELOC): New macros.
Tue Aug 18 14:59:21 1992 Ken Raeburn (raeburn@cygnus.com)
* config/sparc.mt: New file. Grab sparc opcode table from bfd

17
gas/as.h
View File

@ -197,9 +197,9 @@ extern int section_alignment[];
/* relax() */
typedef enum _relax_state {
rs_fill, /* Variable chars to be repeated fr_offset times. Fr_symbol
unused. Used with fr_offset == 0 for a constant length
frag. */
rs_fill = 1, /* Variable chars to be repeated fr_offset times.
Fr_symbol unused. Used with fr_offset == 0 for a
constant length frag. */
rs_align, /* Align: Fr_offset: power of 2. 1 variable char: fill
character. */
@ -281,13 +281,14 @@ COMMON fragS bss_address_frag; /* For local common (N_BSS segment) fixups. */
/* main program "as.c" (command arguments etc) */
COMMON char
flagseen[128]; /* ['x'] TRUE if "-x" seen. */
COMMON char flagseen[128]; /* ['x'] TRUE if "-x" seen. */
COMMON char *
out_file_name; /* name of emitted object file */
COMMON char * out_file_name; /* name of emitted object file */
COMMON int need_pass_2; /* TRUE if we need a second pass. */
COMMON int need_pass_2; /* TRUE if we need a second pass. */
COMMON int linkrelax; /* TRUE if we should do no relaxing, and
leave lots of padding. */
typedef struct {
char * poc_name; /* assembler mnemonic, lower case, no '.' */

3
gas/config/obj-bout.c
View File

@ -102,7 +102,8 @@ fixS *fixP; /* Fixup chain for this segment. */
relax_addressT segment_address_in_file;
{
for (; fixP; fixP = fixP->fx_next) {
if (fixP->fx_addsy != NULL) {
if (fixP->fx_addsy != NULL
|| fixP->fx_r_type != NO_RELOC) {
tc_bout_fix_to_chars(*where, fixP, segment_address_in_file);
*where += sizeof(struct relocation_info);
} /* if there's a symbol */

124
gas/config/tc-i960.c
View File

@ -126,8 +126,8 @@ static int targ_has_iclass();/* Target chip supports instruction set? */
/* static void unlink_sym(); */ /* Remove a symbol from the symbol list */
/* See md_parse_option() for meanings of these options */
static char norelax = 0; /* True if -norelax switch seen */
static char instrument_branches = 0; /* True if -b switch seen */
static char norelax; /* True if -norelax switch seen */
static char instrument_branches; /* True if -b switch seen */
/* Characters that always start a comment.
* If the pre-processor is disabled, these aren't very useful.
@ -186,19 +186,17 @@ const relax_typeS
#define S_LEAFPROC 1
#define S_SYSPROC 2
const pseudo_typeS
md_pseudo_table[] = {
{ "bss", s_lcomm, 1 },
{ "extended", float_cons, 't' },
{ "leafproc", parse_po, S_LEAFPROC },
{ "sysproc", parse_po, S_SYSPROC },
{ "word", cons, 4 },
{ "quad", big_cons, 16 },
{ 0, 0, 0 }
};
const pseudo_typeS md_pseudo_table[] = {
{ "bss", s_lcomm, 1 },
{ "extended", float_cons, 't' },
{ "leafproc", parse_po, S_LEAFPROC },
{ "sysproc", parse_po, S_SYSPROC },
{ "word", cons, 4 },
{ "quad", big_cons, 16 },
{ 0, 0, 0 }
};
/* Macros to extract info from an 'expressionS' structure 'e' */
#define adds(e) e.X_add_symbol
@ -479,7 +477,7 @@ char *textP; /* Source text of instruction */
* replaced by decimal numbers
*/
int n_ops; /* Number of instruction operands */
int callx;
struct i960_opcode *oP;
/* Pointer to instruction description */
int branch_predict;
@ -509,6 +507,8 @@ char *textP; /* Source text of instruction */
return;
}
}
/* Check for branch-prediction suffix on opcode mnemonic, strip it off */
n = strlen(args[0]) - 1;
@ -556,6 +556,15 @@ char *textP; /* Source text of instruction */
reg_fmt(args, oP);
break;
case MEM1:
if (args[0][0] == 'c' && args[0][1] == 'a')
{
if (branch_predict)
{
as_warn(bp_error_msg);
}
mem_fmt(args, oP, 1);
break;
}
case MEM2:
case MEM4:
case MEM8:
@ -564,7 +573,7 @@ char *textP; /* Source text of instruction */
if (branch_predict){
as_warn(bp_error_msg);
}
mem_fmt(args, oP);
mem_fmt(args, oP, 0);
break;
case CALLJ:
if (branch_predict){
@ -833,8 +842,10 @@ char ***vecP;
NULL, 0
};
struct tabentry *tp;
if (!strcmp(*argP,"norelax")){
if (!strcmp(*argP,"linkrelax")){
linkrelax = 1;
flagseen ['L'] = 1;
} else if (!strcmp(*argP,"norelax")){
norelax = 1;
} else if (**argP == 'b'){
@ -1062,7 +1073,7 @@ void
0,
0,
0);
fixP->fx_im_disp = 2; /* 32-bit displacement fix */
fixP->fx_im_disp = 2; /* 32-bit displacement fix */
}
}
@ -1459,9 +1470,10 @@ char *args[]; /* Output arg: pointers to opcode and operands placed
* mem_fmt: generate a MEMA- or MEMB-format instruction
*
**************************************************************************** */
static void mem_fmt(args, oP)
static void mem_fmt(args, oP, callx)
char *args[]; /* args[0]->opcode mnemonic, args[1-3]->operands */
struct i960_opcode *oP; /* Pointer to description of instruction */
int callx; /* Is this a callx opcode */
{
int i; /* Loop counter */
struct regop regop; /* Description of register operand */
@ -1546,8 +1558,9 @@ struct i960_opcode *oP; /* Pointer to description of instruction */
subs(expr),
offs(expr),
0,
0);
fixP->fx_im_disp = 2; /* 32-bit displacement fix */
NO_RELOC);
fixP->fx_im_disp = 2; /* 32-bit displacement fix */
fixP->fx_bsr = callx; /*SAC LD RELAX HACK */ /* Mark reloc as being in i stream */
break;
default:
@ -2245,7 +2258,7 @@ fixS *fixP; /* Relocation that can be done at assembly time */
if (!fixP->fx_callj) {
return;
} /* This wasn't a callj instruction in the first place */
where = fixP->fx_frag->fr_literal + fixP->fx_where;
if (TC_S_IS_SYSPROC(fixP->fx_addsy)) {
@ -2552,17 +2565,42 @@ relax_addressT segment_address_in_file;
/* JF this is for paranoia */
memset((char *)&ri, '\0', sizeof(ri));
know((symbolP = fixP->fx_addsy) != 0);
symbolP = fixP->fx_addsy;
know(symbolP != 0 || fixP->fx_r_type != NO_RELOC);
ri.r_bsr = fixP->fx_bsr; /*SAC LD RELAX HACK */
/* These two 'cuz of NS32K */
ri.r_callj = fixP->fx_callj;
ri.r_length = nbytes_r_length[fixP->fx_size];
if(fixP->fx_bit_fixP) {
ri.r_length = 1;
}
else {
ri.r_length = nbytes_r_length[fixP->fx_size];
}
ri.r_pcrel = fixP->fx_pcrel;
ri.r_address = fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file;
if (!S_IS_DEFINED(symbolP)) {
if (fixP->fx_r_type != NO_RELOC)
{
switch (fixP->fx_r_type)
{
case rs_align:
ri.r_index = -2;
ri.r_pcrel = 1;
ri.r_length = fixP->fx_size - 1;
break;
case rs_org:
ri.r_index = -2;
ri.r_pcrel = 0;
break;
case rs_fill:
ri.r_index = -1;
break;
default:
abort ();
}
ri.r_extern = 0;
}
else if (linkrelax || !S_IS_DEFINED(symbolP)) {
ri.r_extern = 1;
ri.r_index = symbolP->sy_number;
} else {
@ -2749,6 +2787,32 @@ symbolS *symbolP;
return;
} /* tc_coff_symbol_emit_hook() */
void
i960_handle_align (fragp)
fragS *fragp;
{
fixS *fixp;
segT old_seg = now_seg, this_seg;
int old_subseg = now_subseg;
int pad_size;
extern struct frag *text_last_frag, *data_last_frag;
if (!linkrelax)
return;
/* The text section "ends" with another alignment reloc, to which we
aren't adding padding. */
if (fragp->fr_next == text_last_frag
|| fragp->fr_next == data_last_frag)
{
return;
}
/* alignment directive */
fixp = fix_new (fragp, fragp->fr_fix, fragp->fr_offset, 0, 0, 0, 0,
(int) fragp->fr_type);
}
/*
* Local Variables:
* comment-column: 0

6
gas/messages.c
View File

@ -92,7 +92,7 @@
*/
static int warning_count = 0; /* Count of number of warnings issued */
static int warning_count; /* Count of number of warnings issued */
int had_warnings() {
return(warning_count);
@ -101,7 +101,7 @@ int had_warnings() {
/* Nonzero if we've hit a 'bad error', and should not write an obj file,
and exit with a nonzero error code */
static int error_count = 0;
static int error_count;
int had_errors() {
return(error_count);
@ -177,7 +177,7 @@ char *Format;
/*
* a s _ w a r n ()
*
* Send to stderr a string (with bell) (JF: Bell is obnoxious!) as a warning, and locate warning
* Send to stderr a string as a warning, and locate warning
* in input file(s).
* Please only use this for when we have some recovery action.
* Please explain in string (which may have '\n's) what recovery was done.

129
gas/write.c
View File

@ -34,12 +34,12 @@
#endif
#ifndef MANY_SEGMENTS
static struct frag *text_frag_root;
static struct frag *data_frag_root;
static struct frag *bss_frag_root;
struct frag *text_frag_root;
struct frag *data_frag_root;
struct frag *bss_frag_root;
static struct frag *text_last_frag; /* Last frag in segment. */
static struct frag *data_last_frag; /* Last frag in segment. */
struct frag *text_last_frag; /* Last frag in segment. */
struct frag *data_last_frag; /* Last frag in segment. */
static struct frag *bss_last_frag; /* Last frag in segment. */
#endif
@ -53,24 +53,10 @@ char *next_object_file_charP; /* Tracks object file bytes. */
int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
/* static long length; JF unused */ /* String length, including trailing '\0'. */
#if __STDC__ == 1
static int is_dnrange(struct frag *f1, struct frag *f2);
static long fixup_segment(fixS *fixP, segT this_segment_type);
static relax_addressT relax_align(relax_addressT address, long alignment);
void relax_segment(struct frag *segment_frag_root, segT segment_type);
#else
static int is_dnrange();
static long fixup_segment();
static relax_addressT relax_align();
void relax_segment();
#endif /* not __STDC__ */
static int is_dnrange PARAMS ((struct frag *f1, struct frag *f2));
static long fixup_segment PARAMS ((fixS *fixP, segT this_segment_type));
static relax_addressT relax_align PARAMS ((relax_addressT addr, long align));
void relax_segment PARAMS ((struct frag *seg_frag_root, segT seg_type));
/*
* fix_new()
@ -111,7 +97,7 @@ int r_type; /* Relocation type */
comparing to older versions of gas that have relocs
reverse sorted, it is convenient to have this compile
time option. xoxorich. */
#ifdef REVERSE_SORT_RELOCS
fixP->fx_next = *seg_fix_rootP;
@ -160,10 +146,6 @@ void write_object_file()
register fragS * fragP; /* Track along all frags. */
register struct frchain * next_frchainP;
register fragS * * prev_fragPP;
/* register char * name; */
/* symbolS *symbolP; */
/* register symbolS ** symbolPP; */
/* register fixS * fixP; JF unused */
unsigned int data_siz;
long object_file_size;
@ -178,10 +160,11 @@ void write_object_file()
VMS_Check_For_Main();
#endif /* VMS */
/*
* After every sub-segment, we fake an ".align ...". This conforms to BSD4.2
* brane-damage. We then fake ".fill 0" because that is the kind of frag
* that requires least thought. ".align" frags like to have a following
* frag since that makes calculating their intended length trivial.
* After every sub-segment, we fake an ".align ...". This conforms to
* BSD4.2 brane-damage. We then fake ".fill 0" because that is the
* kind of frag that requires least thought. ".align" frags like to
* have a following frag since that makes calculating their intended
* length trivial.
*/
#define SUB_SEGMENT_ALIGN (2)
for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) {
@ -213,7 +196,8 @@ void write_object_file()
/*
* From now on, we don't care about sub-segments.
* Build one frag chain for each segment. Linked thru fr_next.
* We know that there is at least 1 text frchain & at least 1 data frchain.
* We know that there is at least 1 text frchain & at least 1 data
* frchain.
*/
remove_subsegs(frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
@ -304,6 +288,7 @@ void write_object_file()
bss_address_frag.fr_address = (H_GET_TEXT_SIZE(&headers) +
H_GET_DATA_SIZE(&headers));
/* Slide all the frags */
if (bss_frag_root)
{
@ -316,7 +301,10 @@ void write_object_file()
}
#endif
H_SET_BSS_SIZE(&headers,local_bss_counter + bss_last_frag ? bss_last_frag->fr_address: 0);
if(bss_last_frag) {
local_bss_counter += bss_last_frag->fr_address - bss_frag_root->fr_address;
}
H_SET_BSS_SIZE(&headers,local_bss_counter );
/*
*
@ -362,6 +350,9 @@ void write_object_file()
switch (fragP->fr_type) {
case rs_align:
case rs_org:
#ifdef HANDLE_ALIGN
HANDLE_ALIGN (fragP);
#endif
fragP->fr_type = rs_fill;
know(fragP->fr_var == 1);
know(fragP->fr_next != NULL);
@ -522,12 +513,16 @@ void write_object_file()
* Scan every FixS performing fixups. We had to wait until now to do
* this because md_convert_frag() may have made some fixSs.
*/
H_SET_RELOCATION_SIZE(&headers,
md_reloc_size * fixup_segment(text_fix_root, SEG_TEXT),
md_reloc_size * fixup_segment(data_fix_root, SEG_DATA));
int trsize, drsize;
subseg_change (SEG_TEXT, 0);
trsize = md_reloc_size * fixup_segment (text_fix_root,
SEG_TEXT);
subseg_change (SEG_DATA, 0);
drsize = md_reloc_size * fixup_segment (data_fix_root,
SEG_DATA);
H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
/* FIXME move this stuff into the pre-write-hook */
H_SET_MAGIC_NUMBER(&headers, magic_number_for_object_file);
H_SET_ENTRY_POINT(&headers, 0);
@ -660,16 +655,15 @@ segT segment; /* SEG_DATA or SEG_TEXT */
{
register struct frag * fragP;
register relax_addressT address;
/* register relax_addressT old_address; JF unused */
/* register relax_addressT new_address; JF unused */
#ifndef MANY_SEGMENTS
know(segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS) ;
know(segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
#endif
/* In case md_estimate_size_before_relax() wants to make fixSs. */
subseg_change(segment, 0);
/*
* For each frag in segment: count and store (a 1st guess of) fr_address.
* For each frag in segment: count and store (a 1st guess of)
* fr_address.
*/
address = 0;
for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) {
@ -687,7 +681,8 @@ segT segment; /* SEG_DATA or SEG_TEXT */
case rs_org:
/*
* Assume .org is nugatory. It will grow with 1st relax.
* Assume .org is nugatory. It will grow with 1st
* relax.
*/
break;
@ -804,7 +799,7 @@ segT segment; /* SEG_DATA or SEG_TEXT */
if (symbolP) {
#ifdef MANY_SEGMENTS
#else
know((S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT(symbolP) == SEG_DATA) || (S_GET_SEGMENT(symbolP) == SEG_TEXT));
know((S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT(symbolP) == SEG_DATA) || (S_GET_SEGMENT(symbolP) == SEG_TEXT) || S_GET_SEGMENT(symbolP) == SEG_BSS);
know(symbolP->sy_frag);
know(!(S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (symbolP->sy_frag == &zero_address_frag));
#endif
@ -833,7 +828,7 @@ segT segment; /* SEG_DATA or SEG_TEXT */
if (symbolP) {
#ifndef MANY_SEGMENTS
know((S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT(symbolP) == SEG_DATA) || (S_GET_SEGMENT(symbolP) == SEG_TEXT));
know((S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT(symbolP) == SEG_DATA)|| (S_GET_SEGMENT(symbolP) == SEG_BSS) || (S_GET_SEGMENT(symbolP) == SEG_TEXT));
#endif
know(symbolP->sy_frag);
know(!(S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || symbolP->sy_frag==&zero_address_frag );
@ -953,16 +948,21 @@ segT segment; /* SEG_DATA or SEG_TEXT */
*/
/* How many addresses does the .align take? */
static relax_addressT relax_align(address, alignment)
register relax_addressT address; /* Address now. */
register long alignment; /* Alignment (binary). */
static relax_addressT
relax_align(address, alignment)
register relax_addressT address; /* Address now. */
register long alignment; /* Alignment (binary). */
{
relax_addressT mask;
relax_addressT new_address;
mask = ~ ( (~0) << alignment );
new_address = (address + mask) & (~ mask);
return (new_address - address);
relax_addressT mask;
relax_addressT new_address;
mask = ~ ( (~0) << alignment );
new_address = (address + mask) & (~ mask);
if (linkrelax)
/* We must provide lots of padding, so the linker can discard it
when needed. The linker will not add extra space, ever. */
new_address += (1 << alignment);
return (new_address - address);
} /* relax_align() */
/* fixup_segment()
@ -976,9 +976,10 @@ register long alignment; /* Alignment (binary). */
handle the remaining fixS's that we couldn't completely handle here.
These will be output later by emit_relocations(). */
static long fixup_segment(fixP, this_segment_type)
register fixS * fixP;
segT this_segment_type; /* N_TYPE bits for segment. */
static long
fixup_segment(fixP, this_segment_type)
register fixS *fixP;
segT this_segment_type; /* N_TYPE bits for segment. */
{
register long seg_reloc_count;
register symbolS *add_symbolP;
@ -993,7 +994,15 @@ segT this_segment_type; /* N_TYPE bits for segment. */
/* FIXME: remove this line */ /* fixS *orig = fixP; */
seg_reloc_count = 0;
#ifdef TC_I960
/* If the linker is doing the relaxing, we must not do any fixups */
if (linkrelax) {
for ( ; fixP ; fixP = fixP->fx_next) {
seg_reloc_count++;
}
}
else
#endif
for ( ; fixP; fixP = fixP->fx_next) {
fragP = fixP->fx_frag;
know(fragP);