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target-tilegx: Use TILEGX_EXCP_SIGNAL instead of TILEGX_EXCP_SEGV 

Consolidate signal handling under a single exception.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-09-27 14:26:04 -07:00
parent dd8070d865
commit a0577d2aa9
3 changed files with 30 additions and 21 deletions
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41
linux-user/main.c
View File

@ -3414,17 +3414,6 @@ void cpu_loop(CPUS390XState *env)
#ifdef TARGET_TILEGX
static void gen_sigsegv_maperr(CPUTLGState *env, target_ulong addr)
{
target_siginfo_t info;
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = addr;
queue_signal(env, info.si_signo, &info);
}
static void gen_sigill_reg(CPUTLGState *env)
{
target_siginfo_t info;
@ -3436,17 +3425,36 @@ static void gen_sigill_reg(CPUTLGState *env)
queue_signal(env, info.si_signo, &info);
}
static void do_signal(CPUTLGState *env)
static void do_signal(CPUTLGState *env, int signo, int sigcode)
{
target_siginfo_t info;
info.si_signo = env->signo;
info.si_signo = signo;
info.si_errno = 0;
info.si_code = env->sigcode;
info._sifields._sigfault._addr = env->pc;
if (signo == TARGET_SIGSEGV) {
/* The passed in sigcode is a dummy; check for a page mapping
and pass either MAPERR or ACCERR. */
target_ulong addr = env->excaddr;
info._sifields._sigfault._addr = addr;
if (page_check_range(addr, 1, PAGE_VALID) < 0) {
sigcode = TARGET_SEGV_MAPERR;
} else {
sigcode = TARGET_SEGV_ACCERR;
}
}
info.si_code = sigcode;
queue_signal(env, info.si_signo, &info);
}
static void gen_sigsegv_maperr(CPUTLGState *env, target_ulong addr)
{
env->excaddr = addr;
do_signal(env, TARGET_SIGSEGV, 0);
}
static void set_regval(CPUTLGState *env, uint8_t reg, uint64_t val)
{
if (unlikely(reg >= TILEGX_R_COUNT)) {
@ -3634,15 +3642,12 @@ void cpu_loop(CPUTLGState *env)
do_fetch(env, trapnr, false);
break;
case TILEGX_EXCP_SIGNAL:
do_signal(env);
do_signal(env, env->signo, env->sigcode);
break;
case TILEGX_EXCP_REG_IDN_ACCESS:
case TILEGX_EXCP_REG_UDN_ACCESS:
gen_sigill_reg(env);
break;
case TILEGX_EXCP_SEGV:
gen_sigsegv_maperr(env, env->excaddr);
break;
default:
fprintf(stderr, "trapnr is %d[0x%x].\n", trapnr, trapnr);
g_assert_not_reached();

7
target-tilegx/cpu.c
View File

@ -22,6 +22,7 @@
#include "qemu-common.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "linux-user/syscall_defs.h"
static void tilegx_cpu_dump_state(CPUState *cs, FILE *f,
fprintf_function cpu_fprintf, int flags)
@ -121,8 +122,12 @@ static int tilegx_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
{
TileGXCPU *cpu = TILEGX_CPU(cs);
cs->exception_index = TILEGX_EXCP_SEGV;
/* The sigcode field will be filled in by do_signal in main.c. */
cs->exception_index = TILEGX_EXCP_SIGNAL;
cpu->env.excaddr = address;
cpu->env.signo = TARGET_SIGSEGV;
cpu->env.sigcode = 0;
return 1;
}

3
target-tilegx/cpu.h
View File

@ -60,8 +60,7 @@ enum {
typedef enum {
TILEGX_EXCP_NONE = 0,
TILEGX_EXCP_SYSCALL = 1,
TILEGX_EXCP_SEGV = 2,
TILEGX_EXCP_SIGNAL = 3,
TILEGX_EXCP_SIGNAL = 2,
TILEGX_EXCP_OPCODE_UNKNOWN = 0x101,
TILEGX_EXCP_OPCODE_UNIMPLEMENTED = 0x102,
TILEGX_EXCP_OPCODE_CMPEXCH = 0x103,