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[PATCH 05/22] bsd-user/arm/target_arch_cpu.h: Only support FreeBSD sys c
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From: |
Warner Losh |
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Subject: |
[PATCH 05/22] bsd-user/arm/target_arch_cpu.h: Only support FreeBSD sys calls |
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Date: |
Tue, 1 Feb 2022 04:14:38 -0700 |
Since we don't build on OpenBSD, only do FreeBSD system calls here. In
the future, we'll need to move this to some place like
bsd-user/freebsd/arm/mumble.h, but until then just leave this
inline. This reflects changes to the upstream.
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
bsd-user/arm/target_arch_cpu.h | 139 ++++++++++++++++-----------------
1 file changed, 66 insertions(+), 73 deletions(-)
diff --git a/bsd-user/arm/target_arch_cpu.h b/bsd-user/arm/target_arch_cpu.h
index b087db48fa4..afb7814a8d1 100644
--- a/bsd-user/arm/target_arch_cpu.h
+++ b/bsd-user/arm/target_arch_cpu.h
@@ -40,7 +40,6 @@ static inline void target_cpu_init(CPUARMState *env,
static inline void target_cpu_loop(CPUARMState *env)
{
int trapnr, si_signo, si_code;
- unsigned int n;
CPUState *cs = env_cpu(env);
for (;;) {
@@ -66,82 +65,76 @@ static inline void target_cpu_loop(CPUARMState *env)
break;
case EXCP_SWI:
{
- n = env->regs[7];
- if (bsd_type == target_freebsd) {
- int ret;
- abi_ulong params = get_sp_from_cpustate(env);
- int32_t syscall_nr = n;
- int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
+ int ret;
+ abi_ulong params = get_sp_from_cpustate(env);
+ int32_t syscall_nr = env->regs[7];
+ int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
- /* See arm/arm/syscall.c cpu_fetch_syscall_args() */
- if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
- syscall_nr = env->regs[0];
- arg1 = env->regs[1];
- arg2 = env->regs[2];
- arg3 = env->regs[3];
- get_user_s32(arg4, params);
- params += sizeof(int32_t);
- get_user_s32(arg5, params);
- params += sizeof(int32_t);
- get_user_s32(arg6, params);
- params += sizeof(int32_t);
- get_user_s32(arg7, params);
- arg8 = 0;
- } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
- syscall_nr = env->regs[0];
- arg1 = env->regs[2];
- arg2 = env->regs[3];
- get_user_s32(arg3, params);
- params += sizeof(int32_t);
- get_user_s32(arg4, params);
- params += sizeof(int32_t);
- get_user_s32(arg5, params);
- params += sizeof(int32_t);
- get_user_s32(arg6, params);
- arg7 = 0;
- arg8 = 0;
- } else {
- arg1 = env->regs[0];
- arg2 = env->regs[1];
- arg3 = env->regs[2];
- arg4 = env->regs[3];
- get_user_s32(arg5, params);
- params += sizeof(int32_t);
- get_user_s32(arg6, params);
- params += sizeof(int32_t);
- get_user_s32(arg7, params);
- params += sizeof(int32_t);
- get_user_s32(arg8, params);
- }
- ret = do_freebsd_syscall(env, syscall_nr, arg1, arg2, arg3,
- arg4, arg5, arg6, arg7, arg8);
+ /* See arm/arm/syscall.c cpu_fetch_syscall_args() */
+ if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
+ syscall_nr = env->regs[0];
+ arg1 = env->regs[1];
+ arg2 = env->regs[2];
+ arg3 = env->regs[3];
+ get_user_s32(arg4, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg5, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg6, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg7, params);
+ arg8 = 0;
+ } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
+ syscall_nr = env->regs[0];
+ arg1 = env->regs[2];
+ arg2 = env->regs[3];
+ get_user_s32(arg3, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg4, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg5, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg6, params);
+ arg7 = 0;
+ arg8 = 0;
+ } else {
+ arg1 = env->regs[0];
+ arg2 = env->regs[1];
+ arg3 = env->regs[2];
+ arg4 = env->regs[3];
+ get_user_s32(arg5, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg6, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg7, params);
+ params += sizeof(int32_t);
+ get_user_s32(arg8, params);
+ }
+ ret = do_freebsd_syscall(env, syscall_nr, arg1, arg2, arg3,
+ arg4, arg5, arg6, arg7, arg8);
+ /*
+ * Compare to arm/arm/vm_machdep.c
+ * cpu_set_syscall_retval()
+ */
+ if (-TARGET_EJUSTRETURN == ret) {
/*
- * Compare to arm/arm/vm_machdep.c
- * cpu_set_syscall_retval()
+ * Returning from a successful sigreturn syscall.
+ * Avoid clobbering register state.
*/
- if (-TARGET_EJUSTRETURN == ret) {
- /*
- * Returning from a successful sigreturn syscall.
- * Avoid clobbering register state.
- */
- break;
- }
- if (-TARGET_ERESTART == ret) {
- env->regs[15] -= env->thumb ? 2 : 4;
- break;
- }
- if ((unsigned int)ret >= (unsigned int)(-515)) {
- ret = -ret;
- cpsr_write(env, CPSR_C, CPSR_C, CPSRWriteByInstr);
- env->regs[0] = ret;
- } else {
- cpsr_write(env, 0, CPSR_C, CPSRWriteByInstr);
- env->regs[0] = ret; /* XXX need to handle lseek()? */
- /* env->regs[1] = 0; */
- }
+ break;
+ }
+ if (-TARGET_ERESTART == ret) {
+ env->regs[15] -= env->thumb ? 2 : 4;
+ break;
+ }
+ if ((unsigned int)ret >= (unsigned int)(-515)) {
+ ret = -ret;
+ cpsr_write(env, CPSR_C, CPSR_C, CPSRWriteByInstr);
+ env->regs[0] = ret;
} else {
- fprintf(stderr, "qemu: bsd_type (= %d) syscall "
- "not supported\n", bsd_type);
+ cpsr_write(env, 0, CPSR_C, CPSRWriteByInstr);
+ env->regs[0] = ret; /* XXX need to handle lseek()? */
+ /* env->regs[1] = 0; */
}
}
break;
--
2.33.1
- [PATCH 10/22] bsd-user: Move system call building to os-syscall.c, (continued)
- [PATCH 10/22] bsd-user: Move system call building to os-syscall.c, Warner Losh, 2022/02/01
- [PATCH 02/22] bsd-user/x86_64/target_arch_cpu.h: int $80 never was a BSD system call on amd64, Warner Losh, 2022/02/01
- [PATCH 06/22] bsd-user/arm/target_arch_thread.h: Assume a FreeBSD target, Warner Losh, 2022/02/01
- [PATCH 01/22] bsd-user/main.c: Drop syscall flavor arg -bsd, Warner Losh, 2022/02/01
- [PATCH 05/22] bsd-user/arm/target_arch_cpu.h: Only support FreeBSD sys calls,
Warner Losh <=
- [PATCH 04/22] bsd-user/i386/target_arch_cpu.h: Remove openbsd syscall, Warner Losh, 2022/02/01
- [PATCH 18/22] bsd-user: Define target_arg64, Warner Losh, 2022/02/01
- [PATCH 14/22] bsd-user/freebsd/os-syscall.c: lock_iovec, Warner Losh, 2022/02/01