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gas .align limit

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At the moment we allow alignment of up to half the address space,
which is stupidly large and results in OOM on x86_64.  Change that to
1G alignment in text sections.  Also fix the warning message on
exceeding max allowed alignment.

	* read.c (TC_ALIGN_LIMIT): Limit to 30 in text sections.
	(s_align): Correct "alignment too large" value.
This commit is contained in:
Alan Modra
2025-05-16 12:31:39 +09:30
parent e04c2a82f2
commit ff4c03516c
1 changed files with 11 additions and 5 deletions
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16
gas/read.c
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@@ -234,7 +234,6 @@ static unsigned int bundle_lock_depth;
#endif
static void do_s_func (int end_p, const char *default_prefix);
static void s_align (int, int);
static void s_altmacro (int);
static void s_bad_end (int);
static void s_reloc (int);
@@ -1514,13 +1513,19 @@ s_abort (int ignore ATTRIBUTE_UNUSED)
as_fatal (_(".abort detected. Abandoning ship."));
}
#ifndef TC_ALIGN_LIMIT
/* Limit alignment in code to 1G, to limit the amount of memory used
by rs_code_align frags. */
#define TC_ALIGN_LIMIT \
((subseg_text_p (now_seg) \
&& stdoutput->arch_info->bits_per_address >= 32) \
? 30 : stdoutput->arch_info->bits_per_address - 1)
#endif
/* Handle the .align pseudo-op. A positive ARG is a default alignment
(in bytes). A negative ARG is the negative of the length of the
fill pattern. BYTES_P is non-zero if the alignment value should be
interpreted as the byte boundary, rather than the power of 2. */
#ifndef TC_ALIGN_LIMIT
#define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
#endif
static void
s_align (signed int arg, int bytes_p)
@@ -1573,7 +1578,8 @@ s_align (signed int arg, int bytes_p)
if (align > align_limit)
{
align = align_limit;
as_warn (_("alignment too large: %u assumed"), align_limit);
as_warn (_("alignment too large: %u assumed"),
bytes_p ? 1u << align_limit : align_limit);
}
if (*input_line_pointer != ',')