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109 lines
3.5 KiB
Diff
109 lines
3.5 KiB
Diff
From 7d3692c6933f7ff87bf110dede8e33e922b164c6 Mon Sep 17 00:00:00 2001
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From: jcmvbkbc <jcmvbkbc@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Tue, 15 Sep 2015 19:30:32 +0000
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Subject: [PATCH] xtensa: fix xtensa_fallback_frame_state for call0 ABI
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2015-09-15 Max Filippov <jcmvbkbc@gmail.com>
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gcc/
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* config/xtensa/xtensa.h (DWARF_ALT_FRAME_RETURN_COLUMN): New
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definition.
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(DWARF_FRAME_REGISTERS): Reserve space for one extra register in
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call0 ABI.
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libgcc/
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* config/xtensa/linux-unwind.h (xtensa_fallback_frame_state):
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Add support for call0 ABI.
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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@227809 138bc75d-0d04-0410-961f-82ee72b054a4
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Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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---
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gcc/config/xtensa/xtensa.h | 4 +++-
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libgcc/config/xtensa/linux-unwind.h | 30 ++++++++++++++++++++++++++++--
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2 files changed, 31 insertions(+), 3 deletions(-)
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diff --git a/gcc/config/xtensa/xtensa.h b/gcc/config/xtensa/xtensa.h
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index 584080b..e165def 100644
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--- a/gcc/config/xtensa/xtensa.h
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+++ b/gcc/config/xtensa/xtensa.h
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@@ -813,7 +813,9 @@ typedef struct xtensa_args
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for debugging. */
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#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, 0)
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#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (0)
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-#define DWARF_FRAME_REGISTERS 16
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+#define DWARF_ALT_FRAME_RETURN_COLUMN 16
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+#define DWARF_FRAME_REGISTERS (DWARF_ALT_FRAME_RETURN_COLUMN \
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+ + (TARGET_WINDOWED_ABI ? 0 : 1))
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#define EH_RETURN_DATA_REGNO(N) ((N) < 2 ? (N) + 2 : INVALID_REGNUM)
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#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
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(flag_pic \
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diff --git a/libgcc/config/xtensa/linux-unwind.h b/libgcc/config/xtensa/linux-unwind.h
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index 9daf738..9a67b5d 100644
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--- a/libgcc/config/xtensa/linux-unwind.h
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+++ b/libgcc/config/xtensa/linux-unwind.h
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@@ -52,7 +52,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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#define ENTRY_BYTE 0x36
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#endif
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-#ifdef __XTENSA_WINDOWED_ABI__
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#define MD_FALLBACK_FRAME_STATE_FOR xtensa_fallback_frame_state
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static _Unwind_Reason_Code
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@@ -61,6 +60,10 @@ xtensa_fallback_frame_state (struct _Unwind_Context *context,
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{
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unsigned char *pc = context->ra;
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struct sigcontext *sc;
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+#if defined(__XTENSA_CALL0_ABI__)
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+ _Unwind_Ptr new_cfa;
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+ int i;
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+#endif
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struct rt_sigframe {
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siginfo_t info;
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@@ -76,6 +79,7 @@ xtensa_fallback_frame_state (struct _Unwind_Context *context,
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|| pc[5] != SYSC_BYTE2)
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return _URC_END_OF_STACK;
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+#if defined(__XTENSA_WINDOWED_ABI__)
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rt_ = context->sp;
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sc = &rt_->uc.uc_mcontext;
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fs->signal_regs = (_Unwind_Word *) sc->sc_a;
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@@ -90,11 +94,33 @@ xtensa_fallback_frame_state (struct _Unwind_Context *context,
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}
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else
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fs->signal_ra = sc->sc_pc;
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+#elif defined(__XTENSA_CALL0_ABI__)
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+ rt_ = context->cfa;
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+ sc = &rt_->uc.uc_mcontext;
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+
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+ new_cfa = (_Unwind_Ptr) sc;
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+ fs->regs.cfa_how = CFA_REG_OFFSET;
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+ fs->regs.cfa_reg = __LIBGCC_STACK_POINTER_REGNUM__;
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+ fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa;
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+
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+ for (i = 0; i < 16; i++)
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+ {
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+ fs->regs.reg[i].how = REG_SAVED_OFFSET;
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+ fs->regs.reg[i].loc.offset = (_Unwind_Ptr) &(sc->sc_a[i]) - new_cfa;
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+ }
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+
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+ fs->regs.reg[__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__].how =
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+ REG_SAVED_VAL_OFFSET;
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+ fs->regs.reg[__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__].loc.offset =
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+ (_Unwind_Ptr) (sc->sc_pc) - new_cfa;
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+ fs->retaddr_column = __LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__;
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+#else
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+#error Unsupported Xtensa ABI
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+#endif
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fs->signal_frame = 1;
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return _URC_NO_REASON;
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}
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-#endif /* __XTENSA_WINDOWED_ABI__ */
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#endif /* ifdef inhibit_libc */
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--
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2.1.4
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