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* dw2gencfi.c (SUPPORT_FRAME_LINKONCE): Define. Use throughout

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file to conditionally compile code added 2011-04-26.
	(cfi_change_reg_numbers): Add ATTRIBUTE_UNUSED on params only used
	when SUPPORT_FRAME_LINKONCE.
	(get_cfi_seg): Likewise.  Reintroduce old code for when not
	SUPPORT_FRAME_LINKONCE.
	(cfi_finish): Move get_cfi_seg calls out of loop when not
	SUPPORT_FRAME_LINKONCE.  Avoid unused var warning.
This commit is contained in:
Alan Modra 2011-05-05 13:11:36 +00:00
parent c7e4b1840a
commit 67ed740125
2 changed files with 93 additions and 21 deletions
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11
gas/ChangeLog
View File

@ -1,3 +1,14 @@
2011-05-05 Alan Modra <amodra@gmail.com>
* dw2gencfi.c (SUPPORT_FRAME_LINKONCE): Define. Use throughout
file to conditionally compile code added 2011-04-26.
(cfi_change_reg_numbers): Add ATTRIBUTE_UNUSED on params only used
when SUPPORT_FRAME_LINKONCE.
(get_cfi_seg): Likewise. Reintroduce old code for when not
SUPPORT_FRAME_LINKONCE.
(cfi_finish): Move get_cfi_seg calls out of loop when not
SUPPORT_FRAME_LINKONCE. Avoid unused var warning.
2011-05-03 Paul Brook <paul@codesourcery.com>

95
gas/dw2gencfi.c
View File

@ -76,6 +76,13 @@
#define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
#endif
#if defined (TE_PE) || defined (TE_PEP)
#define SUPPORT_FRAME_LINKONCE 1
#else
#define SUPPORT_FRAME_LINKONCE 0
#endif
#if SUPPORT_FRAME_LINKONCE
/* Private segment collection list. */
struct dwcfi_seg_list
{
@ -141,13 +148,11 @@ alloc_debugseg_item (segT seg, int subseg, char *name)
static segT
is_now_linkonce_segment (void)
{
#if defined (TE_PE) || defined (TE_PEP)
if ((bfd_get_section_flags (stdoutput, now_seg)
& (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
| SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE
| SEC_LINK_DUPLICATES_SAME_CONTENTS)) != 0)
return now_seg;
#endif
return NULL;
}
@ -227,6 +232,7 @@ dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags)
return item;
}
#endif
/* ??? Share this with dwarf2cfg.c. */
#ifndef TC_DWARF2_EMIT_OFFSET
@ -255,7 +261,9 @@ struct cfi_escape_data
struct cfi_insn_data
{
struct cfi_insn_data *next;
#if SUPPORT_FRAME_LINKONCE
segT cur_seg;
#endif
int insn;
union
{
@ -293,7 +301,9 @@ struct cfi_insn_data
struct fde_entry
{
struct fde_entry *next;
#if SUPPORT_FRAME_LINKONCE
segT cseg;
#endif
symbolS *start_address;
symbolS *end_address;
struct cfi_insn_data *data;
@ -304,13 +314,17 @@ struct fde_entry
expressionS lsda;
unsigned int return_column;
unsigned int signal_frame;
#if SUPPORT_FRAME_LINKONCE
int handled;
#endif
};
struct cie_entry
{
struct cie_entry *next;
#if SUPPORT_FRAME_LINKONCE
segT cur_seg;
#endif
symbolS *start_address;
unsigned int return_column;
unsigned int signal_frame;
@ -357,8 +371,10 @@ alloc_fde_entry (void)
frchain_now->frch_cfi_data->cur_fde_data = fde;
*last_fde_data = fde;
last_fde_data = &fde->next;
#if SUPPORT_FRAME_LINKONCE
fde->cseg = is_now_linkonce_segment ();
fde->handled = 0;
#endif
fde->last = &fde->data;
fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN;
fde->per_encoding = DW_EH_PE_omit;
@ -382,8 +398,9 @@ alloc_cfi_insn_data (void)
*cur_fde_data->last = insn;
cur_fde_data->last = &insn->next;
#if SUPPORT_FRAME_LINKONCE
insn->cur_seg = is_now_linkonce_segment ();
#endif
return insn;
}
@ -1552,8 +1569,10 @@ output_cie (struct cie_entry *cie, bfd_boolean eh_frame, int align)
{
for (i = cie->first; i != cie->last; i = i->next)
{
#if SUPPORT_FRAME_LINKONCE
if (i->cur_seg != cie->cur_seg)
continue;
#endif
output_cfi_insn (i);
}
}
@ -1663,10 +1682,10 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie,
}
for (; first; first = first->next)
{
#if SUPPORT_FRAME_LINKONCE
if (first->cur_seg == fde->cseg)
#endif
output_cfi_insn (first);
}
frag_align (align, DW_CFA_nop, 0);
symbol_set_value_now (end_address);
@ -1681,8 +1700,11 @@ select_cie_for_fde (struct fde_entry *fde, bfd_boolean eh_frame,
for (cie = cie_root; cie; cie = cie->next)
{
if (cie->cur_seg != fde->cseg
|| cie->return_column != fde->return_column
#if SUPPORT_FRAME_LINKONCE
if (cie->cur_seg != fde->cseg)
continue;
#endif
if (cie->return_column != fde->return_column
|| cie->signal_frame != fde->signal_frame
|| cie->per_encoding != fde->per_encoding
|| cie->lsda_encoding != fde->lsda_encoding)
@ -1780,7 +1802,9 @@ select_cie_for_fde (struct fde_entry *fde, bfd_boolean eh_frame,
cie = (struct cie_entry *) xmalloc (sizeof (struct cie_entry));
cie->next = cie_root;
cie_root = cie;
#if SUPPORT_FRAME_LINKONCE
cie->cur_seg = fde->cseg;
#endif
cie->return_column = fde->return_column;
cie->signal_frame = fde->signal_frame;
cie->per_encoding = fde->per_encoding;
@ -1805,12 +1829,14 @@ select_cie_for_fde (struct fde_entry *fde, bfd_boolean eh_frame,
#ifdef md_reg_eh_frame_to_debug_frame
static void
cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg)
cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg ATTRIBUTE_UNUSED)
{
for (; insn; insn = insn->next)
{
#if SUPPORT_FRAME_LINKONCE
if (insn->cur_seg != ccseg)
continue;
#endif
switch (insn->insn)
{
case DW_CFA_advance_loc:
@ -1852,15 +1878,22 @@ cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg)
#endif
static segT
get_cfi_seg (segT cseg, const char *base, flagword flags, int align)
get_cfi_seg (segT cseg ATTRIBUTE_UNUSED,
const char *base, flagword flags, int align)
{
#if SUPPORT_FRAME_LINKONCE
struct dwcfi_seg_list *l;
l = dwcfi_hash_find_or_make (cseg, base, flags);
subseg_set (l->seg, l->subseg);
record_alignment (l->seg, align);
return l->seg;
cseg = l->seg;
subseg_set (cseg, l->subseg);
#else
cseg = subseg_new (base, 0);
bfd_set_section_flags (stdoutput, cseg, flags);
#endif
record_alignment (cseg, align);
return cseg;
}
void
@ -1881,11 +1914,24 @@ cfi_finish (void)
save_flag_traditional_format = flag_traditional_format;
flag_traditional_format = 1;
#if !SUPPORT_FRAME_LINKONCE
/* Open .eh_frame section. */
cfi_seg = get_cfi_seg (NULL, ".eh_frame",
SEC_ALLOC | SEC_LOAD | SEC_DATA
| DWARF2_EH_FRAME_READ_ONLY,
EH_FRAME_ALIGNMENT);
#ifdef md_fix_up_eh_frame
md_fix_up_eh_frame (cfi_seg);
#else
(void) cfi_seg;
#endif
#endif
do
{
ccseg = NULL;
cfi_seg = NULL;
seek_next_seg = 0;
for (cie = cie_root; cie; cie = cie_next)
{
cie_next = cie->next;
@ -1895,6 +1941,7 @@ cfi_finish (void)
for (fde = all_fde_data; fde ; fde = fde->next)
{
#if SUPPORT_FRAME_LINKONCE
if (fde->handled != 0)
continue;
if (seek_next_seg && fde->cseg != ccseg)
@ -1912,10 +1959,13 @@ cfi_finish (void)
EH_FRAME_ALIGNMENT);
#ifdef md_fix_up_eh_frame
md_fix_up_eh_frame (cfi_seg);
#else
(void) cfi_seg;
#endif
seek_next_seg = 1;
}
fde->handled = 1;
#endif
if (fde->end_address == NULL)
{
@ -1928,10 +1978,12 @@ cfi_finish (void)
fde->next == NULL ? EH_FRAME_ALIGNMENT : 2);
}
}
while (seek_next_seg == 2);
while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2);
#if SUPPORT_FRAME_LINKONCE
for (fde = all_fde_data; fde ; fde = fde->next)
fde->handled = 0;
#endif
flag_traditional_format = save_flag_traditional_format;
}
@ -1940,11 +1992,16 @@ cfi_finish (void)
{
int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1;
#if !SUPPORT_FRAME_LINKONCE
get_cfi_seg (NULL, ".debug_frame",
SEC_READONLY | SEC_DEBUGGING,
alignment);
#endif
do
{
ccseg = NULL;
cfi_seg = NULL;
seek_next_seg = 0;
for (cie = cie_root; cie; cie = cie_next)
{
cie_next = cie->next;
@ -1954,6 +2011,7 @@ cfi_finish (void)
for (fde = all_fde_data; fde ; fde = fde->next)
{
#if SUPPORT_FRAME_LINKONCE
if (fde->handled != 0)
continue;
if (seek_next_seg && fde->cseg != ccseg)
@ -1965,12 +2023,13 @@ cfi_finish (void)
{
ccseg = fde->cseg;
/* Open .debug_frame section. */
cfi_seg = get_cfi_seg (ccseg, ".debug_frame",
get_cfi_seg (ccseg, ".debug_frame",
SEC_READONLY | SEC_DEBUGGING,
alignment);
seek_next_seg = 1;
}
fde->handled = 1;
#endif
if (fde->end_address == NULL)
{
as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
@ -1984,10 +2043,12 @@ cfi_finish (void)
output_fde (fde, cie, FALSE, first, alignment);
}
}
while (seek_next_seg == 2);
while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2);
#if SUPPORT_FRAME_LINKONCE
for (fde = all_fde_data; fde ; fde = fde->next)
fde->handled = 0;
#endif
}
}