Jakub Jelinek
8d9254fc8a
Update copyright years.
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From-SVN: r279813
2020-01-01 12:51:42 +01:00
Jakub Jelinek
a554497024
Update copyright years.
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From-SVN: r267494
2019-01-01 13:31:55 +01:00
Alan Modra
1ea7ea181d
[RS6000] libgcc cfi
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There are a few places in libgcc assembly where we don't emit call
frame information for functions, potentially breaking unwinding from
asynchronous signal handlers. This patch fixes them. Although I
patch tramp.S there is no attempt made to provide CFI for the actual
trampoline on the stack. Doing that would require generating CFI at
run time and both registering and deregistering it, which is probably
not worth doing since it would significantly slow down the call.
* config/rs6000/morestack.S (__stack_split_initialize),
(__morestack_get_guard, __morestack_set_guard),
(__morestack_make_guard): Provide CFI covering these functions.
* config/rs6000/tramp.S (__trampoline_setup): Likewise.
From-SVN: r266503
2018-11-27 12:29:56 +10:30
Jakub Jelinek
85ec4feb11
Update copyright years.
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From-SVN: r256169
2018-01-03 11:03:58 +01:00
Jakub Jelinek
cbe34bb5ed
Update copyright years.
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From-SVN: r243994
2017-01-01 13:07:43 +01:00
Jakub Jelinek
818ab71a41
Update copyright years.
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From-SVN: r232055
2016-01-04 15:30:50 +01:00
Alan Modra
3dafb2207e
re PR libgcc/66225 (libgcc/config/rs6000/morecore.S will not build on systems with an older assembler)
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PR libgcc/66225
* config/rs6000/morestack.S: Remove ".abiversion 1".
From-SVN: r223464
2015-05-21 09:25:08 +09:30
Alan Modra
0f0fd74525
rs6000-common.c (TARGET_SUPPORTS_SPLIT_STACK): Define.
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gcc/
* common/config/rs6000/rs6000-common.c (TARGET_SUPPORTS_SPLIT_STACK):
Define.
(rs6000_supports_split_stack): New function.
* gcc/config/rs6000/rs6000.c (machine_function): Add
split_stack_arg_pointer.
(TARGET_EXTRA_LIVE_ON_ENTRY, TARGET_INTERNAL_ARG_POINTER): Define.
(setup_incoming_varargs): Use crtl->args.internal_arg_pointer
rather than virtual_incoming_args_rtx.
(rs6000_va_start): Likewise.
(split_stack_arg_pointer_used_p): New function.
(rs6000_emit_prologue): Set up arg pointer for -fsplit-stack.
(morestack_ref): New var.
(gen_add3_const, rs6000_expand_split_stack_prologue,
rs6000_internal_arg_pointer, rs6000_live_on_entry,
rs6000_split_stack_space_check): New functions.
(rs6000_elf_file_end): Call file_end_indicate_split_stack.
* gcc/config/rs6000/rs6000.md (UNSPEC_STACK_CHECK): Define.
(UNSPECV_SPLIT_STACK_RETURN): Define.
(split_stack_prologue, load_split_stack_limit,
load_split_stack_limit_di, load_split_stack_limit_si,
split_stack_return, split_stack_space_check): New expands and insns.
* gcc/config/rs6000/rs6000-protos.h
(rs6000_expand_split_stack_prologue): Declare.
(rs6000_split_stack_space_check): Declare.
libgcc/
* config/rs6000/morestack.S: New.
* config/rs6000/t-stack-rs6000: New.
* config.host (powerpc*-*-linux*): Add t-stack and t-stack-rs6000
to tmake_file.
* generic-morestack.c: Don't build for powerpc 32-bit.
From-SVN: r223426
2015-05-20 10:56:28 +09:30
