From b2a71af6e2818b867ad486efd9bbadb2b57570e9 Mon Sep 17 00:00:00 2001 From: Xianmiao Qu Date: Tue, 13 Nov 2018 09:12:36 +0000 Subject: [PATCH] linux-unwind.h (_sig_ucontext_t): Remove. 2018-11-13 Xianmiao Qu libgcc/ * config/csky/linux-unwind.h (_sig_ucontext_t): Remove. (csky_fallback_frame_state): Modify the check of the instructions to adapt to changes in the kernel From-SVN: r266060 --- libgcc/ChangeLog | 6 ++ libgcc/config/csky/linux-unwind.h | 105 +++++++++++++++--------------- 2 files changed, 58 insertions(+), 53 deletions(-) diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index cba324428ba..5232118614c 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,9 @@ +2018-11-13 Xianmiao Qu + + * config/csky/linux-unwind.h (_sig_ucontext_t): Remove. + (csky_fallback_frame_state): Modify the check of the + instructions to adapt to changes in the kernel + 2018-11-09 Stafford Horne Richard Henderson diff --git a/libgcc/config/csky/linux-unwind.h b/libgcc/config/csky/linux-unwind.h index 24638defd52..25e4e6c8002 100644 --- a/libgcc/config/csky/linux-unwind.h +++ b/libgcc/config/csky/linux-unwind.h @@ -25,22 +25,33 @@ #ifndef inhibit_libc -/* Do code reading to identify a signal frame, and set the frame - state data appropriately. See unwind-dw2.c for the structs. */ +/* + * Do code reading to identify a signal frame, and set the frame state data + * appropriately. See unwind-dw2.c for the structs. + */ #include #include -/* The third parameter to the signal handler points to something with - this structure defined in asm/ucontext.h, but the name clashes with - struct ucontext from sys/ucontext.h so this private copy is used. */ -typedef struct _sig_ucontext { - unsigned long uc_flags; - struct _sig_ucontext *uc_link; - stack_t uc_stack; - struct sigcontext uc_mcontext; - sigset_t uc_sigmask; -} _sig_ucontext_t; +#define TRAP0_V1 0x0008 +#define MOVI_R1_119_V1 (0x6000 + (119 << 4) + 1) +#define MOVI_R1_127_V1 (0x6000 + (127 << 4) + 1) +#define ADDI_R1_32_V1 (0x2000 + (31 << 4) + 1) +#define ADDI_R1_14_V1 (0x2000 + (13 << 4) + 1) +#define ADDI_R1_12_V1 (0x2000 + (11 << 4) + 1) + +#define TRAP0_V2_PART0 0xc000 +#define TRAP0_V2_PART1 0x2020 +#define MOVI_R7_119_V2_PART0 0xea07 +#define MOVI_R7_119_V2_PART1 119 +#define MOVI_R7_173_V2_PART0 0xea07 +#define MOVI_R7_173_V2_PART1 173 +#define MOVI_R7_139_V2_PART0 0xea07 +#define MOVI_R7_139_V2_PART1 139 + +#define sc_pt_regs(x) (sc->sc_##x) +#define sc_pt_regs_lr (sc->sc_r15) +#define sc_pt_regs_tls(x) (sc->sc_exregs[15]) #define MD_FALLBACK_FRAME_STATE_FOR csky_fallback_frame_state @@ -54,78 +65,66 @@ csky_fallback_frame_state (struct _Unwind_Context *context, int i; /* movi r7, __NR_rt_sigreturn; trap 0 */ - if ((*(pc+0) == 0xea07) && (*(pc+1) == 119) - && (*(pc+2) == 0xc000) && (*(pc+3) == 0x2020)) - { - struct sigframe + if ((*(pc + 0) == MOVI_R7_139_V2_PART0) + && (*(pc + 1) == MOVI_R7_139_V2_PART1) && (*(pc + 2) == TRAP0_V2_PART0) + && (*(pc + 3) == TRAP0_V2_PART1)) { - int sig; - int code; - struct sigcontext *psc; - unsigned long extramask[2]; /* _NSIG_WORDS */ - struct sigcontext sc; - } *_rt = context->cfa; - sc = _rt->psc; // &(_rt->sc); - } - /* movi r7, __NR_rt_sigreturn; trap 0 */ - else if ((*(pc+0) == 0xea07) && (*(pc+1) == 173) - && (*(pc+2) == 0xc000) && (*(pc+3) == 0x2020)) - { - struct rt_sigframe - { - int sig; - struct siginfo *pinfo; - void* puc; - siginfo_t info; - struct ucontext uc; - } *_rt = context->cfa; - sc = &(_rt->uc.uc_mcontext); - } + struct rt_sigframe + { + int sig; + struct siginfo *pinfo; + void *puc; + siginfo_t info; + ucontext_t uc; + } *_rt = context->cfa; + sc = &(_rt->uc.uc_mcontext); + } else return _URC_END_OF_STACK; - new_cfa = (_Unwind_Ptr) sc->sc_usp; + new_cfa = (_Unwind_Ptr) sc_pt_regs (usp); fs->regs.cfa_how = CFA_REG_OFFSET; fs->regs.cfa_reg = STACK_POINTER_REGNUM; fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa; fs->regs.reg[0].how = REG_SAVED_OFFSET; - fs->regs.reg[0].loc.offset = (_Unwind_Ptr)&(sc->sc_a0) - new_cfa; + fs->regs.reg[0].loc.offset = (_Unwind_Ptr) & sc_pt_regs (a0) - new_cfa; fs->regs.reg[1].how = REG_SAVED_OFFSET; - fs->regs.reg[1].loc.offset = (_Unwind_Ptr)&(sc->sc_a1) - new_cfa; + fs->regs.reg[1].loc.offset = (_Unwind_Ptr) & sc_pt_regs (a1) - new_cfa; fs->regs.reg[2].how = REG_SAVED_OFFSET; - fs->regs.reg[2].loc.offset = (_Unwind_Ptr)&(sc->sc_a2) - new_cfa; + fs->regs.reg[2].loc.offset = (_Unwind_Ptr) & sc_pt_regs (a2) - new_cfa; fs->regs.reg[3].how = REG_SAVED_OFFSET; - fs->regs.reg[3].loc.offset = (_Unwind_Ptr)&(sc->sc_a3) - new_cfa; + fs->regs.reg[3].loc.offset = (_Unwind_Ptr) & sc_pt_regs (a3) - new_cfa; for (i = 4; i < 14; i++) { fs->regs.reg[i].how = REG_SAVED_OFFSET; - fs->regs.reg[i].loc.offset = ((_Unwind_Ptr)&(sc->sc_regs[i - 4]) - - new_cfa); + fs->regs.reg[i].loc.offset = + (_Unwind_Ptr) & sc_pt_regs (regs[i - 4]) - new_cfa; } - for (i = 16; i < 32; i++) + for (i = 16; i < 31; i++) { fs->regs.reg[i].how = REG_SAVED_OFFSET; - fs->regs.reg[i].loc.offset = ((_Unwind_Ptr)&(sc->sc_exregs[i - 16]) - - new_cfa); + fs->regs.reg[i].loc.offset = + (_Unwind_Ptr) & sc_pt_regs (exregs[i - 16]) - new_cfa; } + fs->regs.reg[31].loc.offset = + (_Unwind_Ptr) & sc_pt_regs_tls (tls) - new_cfa; /* FIXME : hi lo ? */ fs->regs.reg[15].how = REG_SAVED_OFFSET; - fs->regs.reg[15].loc.offset = (_Unwind_Ptr)&(sc->sc_r15) - new_cfa; + fs->regs.reg[15].loc.offset = (_Unwind_Ptr) & sc_pt_regs_lr - new_cfa; - fs->regs.reg[56].how = REG_SAVED_OFFSET; - fs->regs.reg[56].loc.offset = (_Unwind_Ptr)&(sc->sc_pc) - new_cfa; - fs->retaddr_column = 56; + fs->regs.reg[32].how = REG_SAVED_OFFSET; + fs->regs.reg[32].loc.offset = (_Unwind_Ptr) & sc_pt_regs (pc) - new_cfa; + fs->retaddr_column = 32; fs->signal_frame = 1; return _URC_NO_REASON; } - #endif