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[sh-elf-4_1] linux specific patch (2/2) (applied)
- From: Kaz Kojima <kkojima at rr dot iij4u dot or dot jp>
- To: gcc-patches at gcc dot gnu dot org
- Date: Mon, 09 May 2005 08:39:35 +0900 (JST)
- Subject: [sh-elf-4_1] linux specific patch (2/2) (applied)
This is another patch for sh64-linux that I've checked in on
sh-elf-4_1 branch. It provides an SHmedia version of
MD_FALLBACK_FRAME_STATE_FOR. Tested on sh64-unknown-linux-gnu
and sh4-unknown-linux-gnu.
Regards,
kaz
--
2005-05-08 Kaz Kojima <kkojima@gcc.gnu.org>
* config/sh/linux-unwind.h (SH_DWARF_FRAME_XD0): Remove for SH5.
(SH_DWARF_FRAME_PR, SH_DWARF_FRAME_GBR, SH_DWARF_FRAME_MACL)
(SH_DWARF_FRAME_MACH, SH_DWARF_FRAME_PC, SH_DWARF_FRAME_FPUL):
Likewise.
(SH_DWARF_FRAME_FP0, SH_DWARF_FRAME_FPSCR): Define to the correct
dwarf register number for SHmedia.
(shmedia_fallback_frame_state): New.
(MD_FALLBACK_FRAME_STATE_FOR): Define to it for SH5.
diff -uprN ORIG/gcc-4.1-sh/gcc/config/sh/linux-unwind.h LOCAL/gcc-4.1-sh/gcc/config/sh/linux-unwind.h
--- ORIG/gcc-4.1-sh/gcc/config/sh/linux-unwind.h 2005-02-11 10:12:57.000000000 +0900
+++ LOCAL/gcc-4.1-sh/gcc/config/sh/linux-unwind.h 2005-05-06 07:22:04.981506305 +0900
@@ -35,18 +35,11 @@ Boston, MA 02111-1307, USA. */
# if defined (__SH5__)
#define SH_DWARF_FRAME_GP0 0
-#define SH_DWARF_FRAME_FP0 (__SH5__ == 32 ? 245 : 77)
-#define SH_DWARF_FRAME_XD0 289
+#define SH_DWARF_FRAME_FP0 77
#define SH_DWARF_FRAME_BT0 68
-#define SH_DWARF_FRAME_PR 241
#define SH_DWARF_FRAME_PR_MEDIA 18
-#define SH_DWARF_FRAME_GBR 238
-#define SH_DWARF_FRAME_MACH 239
-#define SH_DWARF_FRAME_MACL 240
-#define SH_DWARF_FRAME_PC 64
#define SH_DWARF_FRAME_SR 65
-#define SH_DWARF_FRAME_FPUL 244
-#define SH_DWARF_FRAME_FPSCR 243
+#define SH_DWARF_FRAME_FPSCR 76
#else
#define SH_DWARF_FRAME_GP0 0
#define SH_DWARF_FRAME_FP0 25
@@ -62,7 +55,88 @@ Boston, MA 02111-1307, USA. */
#endif /* defined (__SH5__) */
#if defined (__SH5__)
-/* MD_FALLBACK_FRAME_STATE_FOR is not yet defined for SHMEDIA. */
+
+#define MD_FALLBACK_FRAME_STATE_FOR shmedia_fallback_frame_state
+
+static _Unwind_Reason_Code
+shmedia_fallback_frame_state (struct _Unwind_Context *context,
+ _Unwind_FrameState *fs)
+{
+ unsigned char *pc = context->ra;
+ struct sigcontext *sc;
+ long new_cfa;
+ int i, r;
+
+ /* movi 0x10,r9; shori 0x77,r9; trapa r9; nop (sigreturn) */
+ /* movi 0x10,r9; shori 0xad,r9; trapa r9; nop (rt_sigreturn) */
+ if ((*(unsigned long *) (pc-1) == 0xcc004090)
+ && (*(unsigned long *) (pc+3) == 0xc801dc90)
+ && (*(unsigned long *) (pc+7) == 0x6c91fff0)
+ && (*(unsigned long *) (pc+11) == 0x6ff0fff0))
+ sc = context->cfa;
+ else if ((*(unsigned long *) (pc-1) == 0xcc004090)
+ && (*(unsigned long *) (pc+3) == 0xc802b490)
+ && (*(unsigned long *) (pc+7) == 0x6c91fff0)
+ && (*(unsigned long *) (pc+11) == 0x6ff0fff0))
+ {
+ struct rt_sigframe {
+ struct siginfo *pinfo;
+ void *puc;
+ struct siginfo info;
+ struct ucontext uc;
+ } *rt_ = context->cfa;
+ sc = (struct sigcontext *) &rt_->uc.uc_mcontext;
+ }
+ else
+ return _URC_END_OF_STACK;
+
+ new_cfa = sc->sc_regs[15];
+ fs->cfa_how = CFA_REG_OFFSET;
+ fs->cfa_reg = 15;
+ fs->cfa_offset = new_cfa - (long) context->cfa;
+
+ for (i = 0; i < 63; i++)
+ {
+ if (i == 15)
+ continue;
+
+ fs->regs.reg[i].how = REG_SAVED_OFFSET;
+ fs->regs.reg[i].loc.offset
+ = (long)&(sc->sc_regs[i]) - new_cfa;
+ }
+
+ fs->regs.reg[SH_DWARF_FRAME_SR].how = REG_SAVED_OFFSET;
+ fs->regs.reg[SH_DWARF_FRAME_SR].loc.offset
+ = (long)&(sc->sc_sr) - new_cfa;
+
+ r = SH_DWARF_FRAME_BT0;
+ for (i = 0; i < 8; i++)
+ {
+ fs->regs.reg[r+i].how = REG_SAVED_OFFSET;
+ fs->regs.reg[r+i].loc.offset
+ = (long)&(sc->sc_tregs[i]) - new_cfa;
+ }
+
+ r = SH_DWARF_FRAME_FP0;
+ for (i = 0; i < 32; i++)
+ {
+ fs->regs.reg[r+i].how = REG_SAVED_OFFSET;
+ fs->regs.reg[r+i].loc.offset
+ = (long)&(sc->sc_fpregs[i]) - new_cfa;
+ }
+
+ fs->regs.reg[SH_DWARF_FRAME_FPSCR].how = REG_SAVED_OFFSET;
+ fs->regs.reg[SH_DWARF_FRAME_FPSCR].loc.offset
+ = (long)&(sc->sc_fpscr) - new_cfa;
+
+ /* We use the slot for the zero register to save return address. */
+ fs->regs.reg[63].how = REG_SAVED_OFFSET;
+ fs->regs.reg[63].loc.offset
+ = (long)&(sc->sc_pc) - new_cfa;
+ fs->retaddr_column = 63;
+ return _URC_NO_REASON;
+}
+
#else /* defined (__SH5__) */
#define MD_FALLBACK_FRAME_STATE_FOR sh_fallback_frame_state