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linux-user: move riscv cpu loop to riscv directory 

No code change, only move code from main.c to
riscv/cpu_loop.c.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael Clark <mjc@sifive.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180411185651.21351-18-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2018-04-11 20:56:49 +02:00
parent 9397e56497
commit 5a0b6d2286
2 changed files with 93 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

101
linux-user/main.c
View File

@ -149,100 +149,6 @@ void fork_end(int child)
}
}
#ifdef TARGET_RISCV
void cpu_loop(CPURISCVState *env)
{
CPUState *cs = CPU(riscv_env_get_cpu(env));
int trapnr, signum, sigcode;
target_ulong sigaddr;
target_ulong ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
signum = 0;
sigcode = 0;
sigaddr = 0;
switch (trapnr) {
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
case RISCV_EXCP_U_ECALL:
env->pc += 4;
if (env->gpr[xA7] == TARGET_NR_arch_specific_syscall + 15) {
/* riscv_flush_icache_syscall is a no-op in QEMU as
self-modifying code is automatically detected */
ret = 0;
} else {
ret = do_syscall(env,
env->gpr[xA7],
env->gpr[xA0],
env->gpr[xA1],
env->gpr[xA2],
env->gpr[xA3],
env->gpr[xA4],
env->gpr[xA5],
0, 0);
}
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->gpr[xA0] = ret;
}
if (cs->singlestep_enabled) {
goto gdbstep;
}
break;
case RISCV_EXCP_ILLEGAL_INST:
signum = TARGET_SIGILL;
sigcode = TARGET_ILL_ILLOPC;
break;
case RISCV_EXCP_BREAKPOINT:
signum = TARGET_SIGTRAP;
sigcode = TARGET_TRAP_BRKPT;
sigaddr = env->pc;
break;
case RISCV_EXCP_INST_PAGE_FAULT:
case RISCV_EXCP_LOAD_PAGE_FAULT:
case RISCV_EXCP_STORE_PAGE_FAULT:
signum = TARGET_SIGSEGV;
sigcode = TARGET_SEGV_MAPERR;
break;
case EXCP_DEBUG:
gdbstep:
signum = gdb_handlesig(cs, TARGET_SIGTRAP);
sigcode = TARGET_TRAP_BRKPT;
break;
default:
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
trapnr);
exit(EXIT_FAILURE);
}
if (signum) {
target_siginfo_t info = {
.si_signo = signum,
.si_errno = 0,
.si_code = sigcode,
._sifields._sigfault._addr = sigaddr
};
queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
}
process_pending_signals(env);
}
}
#endif /* TARGET_RISCV */
#ifdef TARGET_HPPA
static abi_ulong hppa_lws(CPUHPPAState *env)
@ -1322,12 +1228,7 @@ int main(int argc, char **argv, char **envp)
target_cpu_copy_regs(env, regs);
#if defined(TARGET_RISCV)
{
env->pc = regs->sepc;
env->gpr[xSP] = regs->sp;
}
#elif defined(TARGET_HPPA)
#if defined(TARGET_HPPA)
{
int i;
for (i = 1; i < 32; i++) {

92
linux-user/riscv/cpu_loop.c
View File

@ -21,6 +21,98 @@
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPURISCVState *env)
{
CPUState *cs = CPU(riscv_env_get_cpu(env));
int trapnr, signum, sigcode;
target_ulong sigaddr;
target_ulong ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
signum = 0;
sigcode = 0;
sigaddr = 0;
switch (trapnr) {
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
case RISCV_EXCP_U_ECALL:
env->pc += 4;
if (env->gpr[xA7] == TARGET_NR_arch_specific_syscall + 15) {
/* riscv_flush_icache_syscall is a no-op in QEMU as
self-modifying code is automatically detected */
ret = 0;
} else {
ret = do_syscall(env,
env->gpr[xA7],
env->gpr[xA0],
env->gpr[xA1],
env->gpr[xA2],
env->gpr[xA3],
env->gpr[xA4],
env->gpr[xA5],
0, 0);
}
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->gpr[xA0] = ret;
}
if (cs->singlestep_enabled) {
goto gdbstep;
}
break;
case RISCV_EXCP_ILLEGAL_INST:
signum = TARGET_SIGILL;
sigcode = TARGET_ILL_ILLOPC;
break;
case RISCV_EXCP_BREAKPOINT:
signum = TARGET_SIGTRAP;
sigcode = TARGET_TRAP_BRKPT;
sigaddr = env->pc;
break;
case RISCV_EXCP_INST_PAGE_FAULT:
case RISCV_EXCP_LOAD_PAGE_FAULT:
case RISCV_EXCP_STORE_PAGE_FAULT:
signum = TARGET_SIGSEGV;
sigcode = TARGET_SEGV_MAPERR;
break;
case EXCP_DEBUG:
gdbstep:
signum = gdb_handlesig(cs, TARGET_SIGTRAP);
sigcode = TARGET_TRAP_BRKPT;
break;
default:
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
trapnr);
exit(EXIT_FAILURE);
}
if (signum) {
target_siginfo_t info = {
.si_signo = signum,
.si_errno = 0,
.si_code = sigcode,
._sifields._sigfault._addr = sigaddr
};
queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
env->pc = regs->sepc;
env->gpr[xSP] = regs->sp;
}