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linux-user/m68k: remove simulator syscall interface

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This interface has been introduced in 2005 with the
coldfire implementation (e6e5906b6e ColdFire target.)
and looks like to do what the linux-user interface already
does with the TRAP exception rather than the ILLEGAL
exception.

This interface has not been maintained since that.
The semi-hosting interface is not removed so coldfire kernel
with semi-hosting is always supported.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20190524162049.806-1-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Laurent Vivier
2019-05-24 18:20:49 +02:00
parent 808d77bc5f
commit c6d0700f57
5 changed files with 1 additions and 183 deletions
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17
linux-user/m68k/cpu_loop.c
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@ -28,7 +28,6 @@ void cpu_loop(CPUM68KState *env)
int trapnr;
unsigned int n;
target_siginfo_t info;
TaskState *ts = cs->opaque;
for(;;) {
cpu_exec_start(cs);
@ -37,26 +36,14 @@ void cpu_loop(CPUM68KState *env)
process_queued_cpu_work(cs);
switch(trapnr) {
case EXCP_ILLEGAL:
{
if (ts->sim_syscalls) {
uint16_t nr;
get_user_u16(nr, env->pc + 2);
env->pc += 4;
do_m68k_simcall(env, nr);
} else {
goto do_sigill;
}
}
break;
case EXCP_HALT_INSN:
/* Semihosing syscall. */
env->pc += 4;
do_m68k_semihosting(env, env->dregs[0]);
break;
case EXCP_ILLEGAL:
case EXCP_LINEA:
case EXCP_LINEF:
do_sigill:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
@ -80,7 +67,6 @@ void cpu_loop(CPUM68KState *env)
case EXCP_TRAP0:
{
abi_long ret;
ts->sim_syscalls = 0;
n = env->dregs[0];
env->pc += 2;
ret = do_syscall(env,
@ -154,7 +140,6 @@ void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
env->aregs[7] = regs->usp;
env->sr = regs->sr;
ts->sim_syscalls = 1;
ts->stack_base = info->start_stack;
ts->heap_base = info->brk;
/* This will be filled in on the first SYS_HEAPINFO call. */