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* [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire
@ 2006-08-30 6:14 kazu at gcc dot gnu dot org
2006-08-31 2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: kazu at gcc dot gnu dot org @ 2006-08-30 6:14 UTC (permalink / raw)
To: gcc-bugs
m68k port quietly accepts -fstack-limit-symbol on ColdFire.
-fstack-limit-symbol causes gcc to output "trapcs".
However, ColdFire does not support any conditional trap.
--
Summary: m68k port quietly accepts -fstack-limit-symbol on
ColdFire
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: kazu at gcc dot gnu dot org
GCC target triplet: m68k-elf
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug target/28896] conditional trap goes messed up 2006-08-30 6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org @ 2006-08-31 2:50 ` pinskia at gcc dot gnu dot org 2006-08-31 2:58 ` kazu at gcc dot gnu dot org 2006-08-31 3:06 ` [Bug target/28896] -fstack-limit-symbol and m68k and non 68020 pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2006-08-31 2:50 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from pinskia at gcc dot gnu dot org 2006-08-31 02:50 ------- Actually it is not just -fstack-limit-symbol that could go wrong but it is also builtin_trap: (define_insn "conditional_trap" [(trap_if (match_operator 0 "valid_dbcc_comparison_p" [(cc0) (const_int 0)]) (match_operand:SI 1 "const_int_operand" "I"))] "TARGET_68020 && ! flags_in_68881 ()" Are you sure you supplied the correct flags to the compiler because conditional_trap is only enabled for 020. -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|m68k port quietly accepts - |conditional trap goes messed |fstack-limit-symbol on |up |ColdFire | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/28896] conditional trap goes messed up 2006-08-30 6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org 2006-08-31 2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org @ 2006-08-31 2:58 ` kazu at gcc dot gnu dot org 2006-08-31 3:06 ` [Bug target/28896] -fstack-limit-symbol and m68k and non 68020 pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: kazu at gcc dot gnu dot org @ 2006-08-31 2:58 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from kazu at gcc dot gnu dot org 2006-08-31 02:58 ------- trapcs for -fstack-limit-symbol is printed as text in m68k.c, not as an insn in m68k.md. Search for trapcs in m68k.c. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/28896] -fstack-limit-symbol and m68k and non 68020 2006-08-30 6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org 2006-08-31 2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org 2006-08-31 2:58 ` kazu at gcc dot gnu dot org @ 2006-08-31 3:06 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2006-08-31 3:06 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from pinskia at gcc dot gnu dot org 2006-08-31 03:06 ------- Oh: if (current_function_limit_stack && GET_CODE (stack_limit_rtx) == SYMBOL_REF) asm_fprintf (stream, "\tcmp" ASM_DOT "l %I%s+%wd,%Rsp\n\ttrapcs\n", XSTR (stack_limit_rtx, 0), current_frame.size + 4); So this is a problem with more than coldfire then and also 68000 and 68010 code gen. Really m68k_output_function_prologue should be rewritten to use rtl patterns instead of text. -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2006-08-31 03:06:40 date| | Summary|conditional trap goes messed|-fstack-limit-symbol and |up |m68k and non 68020 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-08-31 3:06 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2006-08-30 6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org 2006-08-31 2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org 2006-08-31 2:58 ` kazu at gcc dot gnu dot org 2006-08-31 3:06 ` [Bug target/28896] -fstack-limit-symbol and m68k and non 68020 pinskia at gcc dot gnu dot org
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