Prevent internal assembler errors if a stabs creation function builds an badly formatted input string.
* read.c (temp_ilp): New function. Installs a temporary input line pointer. (restore_ilp): New function. Restores the original input line pointer. * read.h (temp_ilp): Prototype. (restore_ilp): Prototype. * stabs.c (dot_func_p): Use bfd_boolean type. (generate_asm_file): Use temp_ilp and restore_ilp. (stabs_generate_asm_lineno): Likewise. (stabs_generate_asm_endfunc): Likewise.
This commit is contained in:
parent
d95014a2ef
commit
1181551ef0
|
@ -1,3 +1,16 @@
|
|||
2017-01-12 Nick Clifton <nickc@redhat.com>
|
||||
|
||||
* read.c (temp_ilp): New function. Installs a temporary input
|
||||
line pointer.
|
||||
(restore_ilp): New function. Restores the original input line
|
||||
pointer.
|
||||
* read.h (temp_ilp): Prototype.
|
||||
(restore_ilp): Prototype.
|
||||
* stabs.c (dot_func_p): Use bfd_boolean type.
|
||||
(generate_asm_file): Use temp_ilp and restore_ilp.
|
||||
(stabs_generate_asm_lineno): Likewise.
|
||||
(stabs_generate_asm_endfunc): Likewise.
|
||||
|
||||
2017-01-11 Jeremy Soller <jackpot51@gmail.com>
|
||||
|
||||
* configure.tgt: Add entry for i386-redox.
|
||||
|
|
44
gas/read.c
44
gas/read.c
|
@ -6333,3 +6333,47 @@ find_end_of_line (char *s, int mri_string)
|
|||
{
|
||||
return _find_end_of_line (s, mri_string, 0, 0);
|
||||
}
|
||||
|
||||
static char *saved_ilp = NULL;
|
||||
static char *saved_limit;
|
||||
|
||||
/* Use BUF as a temporary input pointer for calling other functions in this
|
||||
file. BUF must be a C string, so that its end can be found by strlen.
|
||||
Also sets the buffer_limit variable (local to this file) so that buffer
|
||||
overruns should not occur. Saves the current input line pointer so that
|
||||
it can be restored by calling restore_ilp().
|
||||
|
||||
Does not support recursion.
|
||||
|
||||
FIXME: This function is currently only used by stabs.c but that
|
||||
should be extended to other files in the gas source directory. */
|
||||
|
||||
void
|
||||
temp_ilp (char *buf)
|
||||
{
|
||||
gas_assert (saved_ilp == NULL);
|
||||
gas_assert (buf != NULL);
|
||||
|
||||
saved_ilp = input_line_pointer;
|
||||
saved_limit = buffer_limit;
|
||||
/* Prevent the assert in restore_ilp from triggering if
|
||||
the input_line_pointer has not yet been initialised. */
|
||||
if (saved_ilp == NULL)
|
||||
saved_limit = saved_ilp = (char *) "";
|
||||
|
||||
input_line_pointer = buf;
|
||||
buffer_limit = buf + strlen (buf);
|
||||
}
|
||||
|
||||
/* Restore a saved input line pointer. */
|
||||
|
||||
void
|
||||
restore_ilp (void)
|
||||
{
|
||||
gas_assert (saved_ilp != NULL);
|
||||
|
||||
input_line_pointer = saved_ilp;
|
||||
buffer_limit = saved_limit;
|
||||
|
||||
saved_ilp = NULL;
|
||||
}
|
||||
|
|
|
@ -213,3 +213,5 @@ extern void s_xstab (int what);
|
|||
extern void s_rva (int);
|
||||
extern void s_incbin (int);
|
||||
extern void s_weakref (int);
|
||||
extern void temp_ilp (char *);
|
||||
extern void restore_ilp (void);
|
||||
|
|
47
gas/stabs.c
47
gas/stabs.c
|
@ -46,13 +46,13 @@ static void generate_asm_file (int, const char *);
|
|||
#define STAB_STRING_SECTION_NAME ".stabstr"
|
||||
#endif
|
||||
|
||||
/* Non-zero if we're in the middle of a .func function, in which case
|
||||
/* True if we're in the middle of a .func function, in which case
|
||||
stabs_generate_asm_lineno emits function relative line number stabs.
|
||||
Otherwise it emits line number stabs with absolute addresses. Note that
|
||||
both cases only apply to assembler code assembled with -gstabs. */
|
||||
static int in_dot_func_p;
|
||||
static bfd_boolean in_dot_func_p = FALSE;
|
||||
|
||||
/* Label at start of current function if in_dot_func_p != 0. */
|
||||
/* Label at start of current function if in_dot_func_p != FALSE. */
|
||||
static const char *current_function_label;
|
||||
|
||||
/*
|
||||
|
@ -510,7 +510,6 @@ generate_asm_file (int type, const char *file)
|
|||
{
|
||||
static char *last_file;
|
||||
static int label_count;
|
||||
char *hold;
|
||||
char sym[30];
|
||||
char *buf;
|
||||
const char *tmp = file;
|
||||
|
@ -525,8 +524,6 @@ generate_asm_file (int type, const char *file)
|
|||
generate a string and then parse it again. That lets us use the
|
||||
existing stabs hook, which expect to see a string, rather than
|
||||
inventing new ones. */
|
||||
hold = input_line_pointer;
|
||||
|
||||
sprintf (sym, "%sF%d", FAKE_LABEL_NAME, label_count);
|
||||
++label_count;
|
||||
|
||||
|
@ -556,8 +553,10 @@ generate_asm_file (int type, const char *file)
|
|||
|
||||
sprintf (bufp, "\",%d,0,0,%s\n", type, sym);
|
||||
|
||||
input_line_pointer = buf;
|
||||
temp_ilp (buf);
|
||||
s_stab ('s');
|
||||
restore_ilp ();
|
||||
|
||||
colon (sym);
|
||||
|
||||
if (last_file != NULL)
|
||||
|
@ -565,8 +564,6 @@ generate_asm_file (int type, const char *file)
|
|||
last_file = xstrdup (file);
|
||||
|
||||
free (buf);
|
||||
|
||||
input_line_pointer = hold;
|
||||
}
|
||||
|
||||
/* Generate stabs debugging information for the current line. This is
|
||||
|
@ -576,7 +573,6 @@ void
|
|||
stabs_generate_asm_lineno (void)
|
||||
{
|
||||
static int label_count;
|
||||
char *hold;
|
||||
const char *file;
|
||||
unsigned int lineno;
|
||||
char *buf;
|
||||
|
@ -590,8 +586,6 @@ stabs_generate_asm_lineno (void)
|
|||
existing stabs hook, which expect to see a string, rather than
|
||||
inventing new ones. */
|
||||
|
||||
hold = input_line_pointer;
|
||||
|
||||
file = as_where (&lineno);
|
||||
|
||||
/* Don't emit sequences of stabs for the same line. */
|
||||
|
@ -638,11 +632,13 @@ stabs_generate_asm_lineno (void)
|
|||
buf = XNEWVEC (char, 100);
|
||||
sprintf (buf, "%d,0,%d,%s\n", N_SLINE, lineno, sym);
|
||||
}
|
||||
input_line_pointer = buf;
|
||||
|
||||
temp_ilp (buf);
|
||||
s_stab ('n');
|
||||
restore_ilp ();
|
||||
|
||||
colon (sym);
|
||||
|
||||
input_line_pointer = hold;
|
||||
outputting_stabs_line_debug = 0;
|
||||
free (buf);
|
||||
}
|
||||
|
@ -653,29 +649,30 @@ stabs_generate_asm_lineno (void)
|
|||
void
|
||||
stabs_generate_asm_func (const char *funcname, const char *startlabname)
|
||||
{
|
||||
static int void_emitted_p;
|
||||
char *hold = input_line_pointer;
|
||||
static bfd_boolean void_emitted_p = FALSE;
|
||||
char *buf;
|
||||
unsigned int lineno;
|
||||
|
||||
if (! void_emitted_p)
|
||||
{
|
||||
input_line_pointer = (char *) "\"void:t1=1\",128,0,0,0";
|
||||
temp_ilp ((char *) "\"void:t1=1\",128,0,0,0");
|
||||
s_stab ('s');
|
||||
void_emitted_p = 1;
|
||||
restore_ilp ();
|
||||
void_emitted_p = TRUE;
|
||||
}
|
||||
|
||||
as_where (&lineno);
|
||||
if (asprintf (&buf, "\"%s:F1\",%d,0,%d,%s",
|
||||
funcname, N_FUN, lineno + 1, startlabname) == -1)
|
||||
as_fatal ("%s", xstrerror (errno));
|
||||
input_line_pointer = buf;
|
||||
|
||||
temp_ilp (buf);
|
||||
s_stab ('s');
|
||||
restore_ilp ();
|
||||
free (buf);
|
||||
|
||||
input_line_pointer = hold;
|
||||
current_function_label = xstrdup (startlabname);
|
||||
in_dot_func_p = 1;
|
||||
in_dot_func_p = TRUE;
|
||||
}
|
||||
|
||||
/* Emit a stab to record the end of a function. */
|
||||
|
@ -685,7 +682,6 @@ stabs_generate_asm_endfunc (const char *funcname ATTRIBUTE_UNUSED,
|
|||
const char *startlabname)
|
||||
{
|
||||
static int label_count;
|
||||
char *hold = input_line_pointer;
|
||||
char *buf;
|
||||
char sym[30];
|
||||
|
||||
|
@ -695,11 +691,12 @@ stabs_generate_asm_endfunc (const char *funcname ATTRIBUTE_UNUSED,
|
|||
|
||||
if (asprintf (&buf, "\"\",%d,0,0,%s-%s", N_FUN, sym, startlabname) == -1)
|
||||
as_fatal ("%s", xstrerror (errno));
|
||||
input_line_pointer = buf;
|
||||
|
||||
temp_ilp (buf);
|
||||
s_stab ('s');
|
||||
restore_ilp ();
|
||||
free (buf);
|
||||
|
||||
input_line_pointer = hold;
|
||||
in_dot_func_p = 0;
|
||||
in_dot_func_p = FALSE;
|
||||
current_function_label = NULL;
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue