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* config/tc-xtensa.c (xtensa_leb128): New function. 

(md_pseudo_table): Use it for sleb128 and uleb128.
	(is_leb128_expr): New internal flag.
	(xtensa_symbol_new_hook): Check new flag.
This commit is contained in:
Bob Wilson 2008-01-18 19:13:48 +00:00
parent 32c9a79572
commit fb227da0a1
2 changed files with 27 additions and 6 deletions
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7
gas/ChangeLog
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@ -1,3 +1,10 @@
2008-01-18 Bob Wilson <bob.wilson@acm.org>
* config/tc-xtensa.c (xtensa_leb128): New function.
(md_pseudo_table): Use it for sleb128 and uleb128.
(is_leb128_expr): New internal flag.
(xtensa_symbol_new_hook): Check new flag.
2008-01-16 Eric B. Weddington <eric.weddington@atmel.com>
* config/tc-avr.c (mcu_types): Change opcode set for avr3,

26
gas/config/tc-xtensa.c
View File

@ -1,5 +1,5 @@
/* tc-xtensa.c -- Assemble Xtensa instructions.
Copyright 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
Copyright 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
@ -442,6 +442,7 @@ static void xtensa_literal_position (int);
static void xtensa_literal_pseudo (int);
static void xtensa_frequency_pseudo (int);
static void xtensa_elf_cons (int);
static void xtensa_leb128 (int);
/* Parsing and Idiom Translation. */
@ -1004,6 +1005,8 @@ const pseudo_typeS md_pseudo_table[] =
{ "4byte", xtensa_elf_cons, 4 },
{ "short", xtensa_elf_cons, 2 },
{ "2byte", xtensa_elf_cons, 2 },
{ "sleb128", xtensa_leb128, 1},
{ "uleb128", xtensa_leb128, 0},
{ "begin", xtensa_begin_directive, 0 },
{ "end", xtensa_end_directive, 0 },
{ "literal", xtensa_literal_pseudo, 0 },
@ -1569,6 +1572,16 @@ xtensa_elf_cons (int nbytes)
demand_empty_rest_of_line ();
}
static bfd_boolean is_leb128_expr;
static void
xtensa_leb128 (int sign)
{
is_leb128_expr = TRUE;
s_leb128 (sign);
is_leb128_expr = FALSE;
}
/* Parsing and Idiom Translation. */
@ -5635,7 +5648,7 @@ symbolS *expr_symbols = NULL;
void
xtensa_symbol_new_hook (symbolS *sym)
{
if (S_GET_SEGMENT (sym) == expr_section)
if (is_leb128_expr && S_GET_SEGMENT (sym) == expr_section)
{
symbol_get_tc (sym)->next_expr_symbol = expr_symbols;
expr_symbols = sym;
@ -7256,10 +7269,11 @@ xtensa_mark_zcl_first_insns (void)
}
/* Some difference-of-symbols expressions make it out to the linker. Some
don't. If one does, then the linker can optimize between the two labels.
If it doesn't, then the linker shouldn't. */
/* When a difference-of-symbols expression is encoded as a uleb128 or
sleb128 value, the linker is unable to adjust that value to account for
link-time relaxation. Mark all the code between such symbols so that
its size cannot be changed by linker relaxation. */
static void
xtensa_mark_difference_of_two_symbols (void)
{