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linux-user/m68k: remove simulator syscall interface 

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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1
linux-user/Makefile.objs
View File

@ -8,4 +8,3 @@ obj-$(TARGET_I386) += vm86.o
obj-$(TARGET_ARM) += arm/nwfpe/
obj-$(TARGET_ARM) += arm/semihost.o
obj-$(TARGET_AARCH64) += arm/semihost.o
obj-$(TARGET_M68K) += m68k-sim.o

163
linux-user/m68k-sim.c
View File

@ -1,163 +0,0 @@
/*
* m68k simulator syscall interface
*
* Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#define SYS_EXIT 1
#define SYS_READ 3
#define SYS_WRITE 4
#define SYS_OPEN 5
#define SYS_CLOSE 6
#define SYS_BRK 17
#define SYS_FSTAT 28
#define SYS_ISATTY 29
#define SYS_LSEEK 199
struct m68k_sim_stat {
uint16_t sim_st_dev;
uint16_t sim_st_ino;
uint32_t sim_st_mode;
uint16_t sim_st_nlink;
uint16_t sim_st_uid;
uint16_t sim_st_gid;
uint16_t sim_st_rdev;
uint32_t sim_st_size;
uint32_t sim_st_atime;
uint32_t sim_st_mtime;
uint32_t sim_st_ctime;
uint32_t sim_st_blksize;
uint32_t sim_st_blocks;
};
static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
{
env->dregs[0] = code;
if (code == (uint32_t)-1) {
env->dregs[1] = errno;
} else {
env->dregs[1] = 0;
}
return code;
}
#define SIM_O_APPEND 0x0008
#define SIM_O_CREAT 0x0200
#define SIM_O_TRUNC 0x0400
#define SIM_O_EXCL 0x0800
#define SIM_O_NONBLOCK 0x4000
#define SIM_O_NOCTTY 0x8000
#define SIM_O_SYNC 0x2000
static int translate_openflags(int flags)
{
int hf;
switch (flags & 3) {
case 0: hf = O_RDONLY; break;
case 1: hf = O_WRONLY; break;
case 2: hf = O_RDWR; break;
default: hf = O_RDWR; break;
}
if (flags & SIM_O_APPEND) hf |= O_APPEND;
if (flags & SIM_O_CREAT) hf |= O_CREAT;
if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
if (flags & SIM_O_EXCL) hf |= O_EXCL;
if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
if (flags & SIM_O_SYNC) hf |= O_SYNC;
return hf;
}
#define ARG(x) tswap32(args[x])
void do_m68k_simcall(CPUM68KState *env, int nr)
{
uint32_t *args;
args = (uint32_t *)(unsigned long)(env->aregs[7] + 4);
switch (nr) {
case SYS_EXIT:
exit(ARG(0));
case SYS_READ:
check_err(env, read(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
break;
case SYS_WRITE:
check_err(env, write(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
break;
case SYS_OPEN:
check_err(env, open((char *)(unsigned long)ARG(0),
translate_openflags(ARG(1)), ARG(2)));
break;
case SYS_CLOSE:
{
/* Ignore attempts to close stdin/out/err. */
int fd = ARG(0);
if (fd > 2)
check_err(env, close(fd));
else
check_err(env, 0);
break;
}
case SYS_BRK:
{
int32_t ret;
ret = do_brk((abi_ulong)ARG(0));
if (ret == -ENOMEM)
ret = -1;
check_err(env, ret);
}
break;
case SYS_FSTAT:
{
struct stat s;
int rc;
struct m68k_sim_stat *p;
rc = check_err(env, fstat(ARG(0), &s));
if (rc == 0) {
p = (struct m68k_sim_stat *)(unsigned long)ARG(1);
p->sim_st_dev = tswap16(s.st_dev);
p->sim_st_ino = tswap16(s.st_ino);
p->sim_st_mode = tswap32(s.st_mode);
p->sim_st_nlink = tswap16(s.st_nlink);
p->sim_st_uid = tswap16(s.st_uid);
p->sim_st_gid = tswap16(s.st_gid);
p->sim_st_rdev = tswap16(s.st_rdev);
p->sim_st_size = tswap32(s.st_size);
p->sim_st_atime = tswap32(s.st_atime);
p->sim_st_mtime = tswap32(s.st_mtime);
p->sim_st_ctime = tswap32(s.st_ctime);
p->sim_st_blksize = tswap32(s.st_blksize);
p->sim_st_blocks = tswap32(s.st_blocks);
}
}
break;
case SYS_ISATTY:
check_err(env, isatty(ARG(0)));
break;
case SYS_LSEEK:
check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2)));
break;
default:
cpu_abort(env_cpu(env), "Unsupported m68k sim syscall %d\n", nr);
}
}

17
linux-user/m68k/cpu_loop.c
View File

@ -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. */

2
linux-user/m68k/target_syscall.h
View File

@ -26,6 +26,4 @@ struct target_pt_regs {
#define TARGET_WANT_OLD_SYS_SELECT
void do_m68k_simcall(CPUM68KState *, int);
#endif /* M68K_TARGET_SYSCALL_H */

1
linux-user/qemu.h
View File

@ -116,7 +116,6 @@ typedef struct TaskState {
#endif
abi_ulong child_tidptr;
#ifdef TARGET_M68K
int sim_syscalls;
abi_ulong tp_value;
#endif
#if defined(TARGET_ARM) || defined(TARGET_M68K)