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linux-unwind.h (_sig_ucontext_t): Remove.

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2018-11-13  Xianmiao Qu  <xianmiao_qu@c-sky.com>

	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
This commit is contained in:
Xianmiao Qu 2018-11-13 09:12:36 +00:00 • committed by Xianmiao Qu
parent 77ece7f52e
commit b2a71af6e2
2 changed files with 58 additions and 53 deletions
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6
libgcc/ChangeLog
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@ -1,3 +1,9 @@
2018-11-13 Xianmiao Qu <xianmiao_qu@c-sky.com>
* 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 <shorne@gmail.com>
Richard Henderson <rth@twiddle.net>

105
libgcc/config/csky/linux-unwind.h
View file

@ -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 <signal.h>
#include <asm/unistd.h>
/* 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