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libgcc2.c (__eh_ffetmnpc): Add support for machines that cannot access globals after throw's epilogue when...

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* libgcc2.c (__eh_ffetmnpc): Add support for machines that cannot
	access globals after throw's epilogue when -fno-sjlj-exceptions is
	used.
	* rs6000.c (DONT_ACCESS_GBLS_AFTER_EPILOGUE): Likewise.
	* mips.h (DONT_ACCESS_GBLS_AFTER_EPILOGUE): Likewise.
	(INITIAL_ELIMINATION_OFFSET): Fix RETURN_ADDRESS_POINTER_REGNUM
	for 64 bit words, with 32 bit pointers and variable endianness.
Fixes throwing across shared library lines (useful at times on mips and rs6000)

From-SVN: r14168
This commit is contained in:
Mike Stump 1997-06-06 23:18:36 +00:00
parent 7ec189f2ec
commit 28174a1465
3 changed files with 22 additions and 1 deletions
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9
gcc/config/mips/mips.h
View File

@ -1966,7 +1966,9 @@ extern struct mips_frame_info current_frame_info;
else if ((FROM) == RETURN_ADDRESS_POINTER_REGNUM \
&& ((TO) == FRAME_POINTER_REGNUM \
|| (TO) == STACK_POINTER_REGNUM)) \
(OFFSET) = current_frame_info.gp_sp_offset; \
(OFFSET) = current_frame_info.gp_sp_offset \
+ ((UNITS_PER_WORD - (POINTER_SIZE / BITS_PER_UNIT)) \
* (BYTES_BIG_ENDIAN != 0)); \
else \
abort (); \
}
@ -4047,3 +4049,8 @@ while (0)
#define NO_BUILTIN_PTRDIFF_TYPE
#define PTRDIFF_TYPE (TARGET_LONG64 ? "long int" : "int")
#endif
/* See mips_expand_prologue's use of loadgp for when this should be
true. */
#define DONT_ACCESS_GBLS_AFTER_EPILOGUE (TARGET_ABICALLS && mips_abi != ABI_32)

4
gcc/config/rs6000/rs6000.h
View File

@ -3126,3 +3126,7 @@ extern int rs6000_valid_type_attribute_p ();
extern void rs6000_set_default_type_attributes ();
extern struct rtx_def *rs6000_dll_import_ref ();
extern struct rtx_def *rs6000_longcall_ref ();
/* See nonlocal_goto_receiver for when this must be set. */
#define DONT_ACCESS_GBLS_AFTER_EPILOGUE (TARGET_TOC && TARGET_MINIMAL_TOC)

10
gcc/libgcc2.c
View File

@ -3436,6 +3436,16 @@ __throw ()
void *__eh_pc;
/* See expand_builtin_throw for details. */
void **__eh_ffetmnpc () {
static void *buf[2] = {
&__find_first_exception_table_match,
&__eh_pc
};
return buf;
}
void
__empty ()
{