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Implement rt signal frames for microblaze-linux-user

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Adjust linux-user test for musl
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Merge remote-tracking branch 'remotes/rth/tags/pull-mb-20201014' into staging

Implement rt signal frames for microblaze-linux-user
Adjust linux-user test for musl

# gpg: Signature made Thu 15 Oct 2020 05:50:00 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-mb-20201014:
  linux-user/microblaze: Remove non-rt signal frames
  linux-user/microblaze: Implement rt signal frames
  tests/tcg/linux-test: Adjust getsockname for musl

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2020-10-15 20:30:24 +01:00
commit 3e40748834
3 changed files with 84 additions and 105 deletions
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186
linux-user/microblaze/signal.c
View File

@ -35,21 +35,15 @@ struct target_stack_t {
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
struct target_stack_t tuc_stack;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
target_sigset_t tuc_sigmask;
};
/* Signal frames. */
struct target_signal_frame {
struct target_rt_sigframe {
target_siginfo_t info;
struct target_ucontext uc;
uint32_t extramask[TARGET_NSIG_WORDS - 1];
uint32_t tramp[2];
};
struct rt_signal_frame {
siginfo_t info;
ucontext_t uc;
uint32_t tramp[2];
};
@ -137,109 +131,95 @@ static abi_ulong get_sigframe(struct target_sigaction *ka,
return ((sp - frame_size) & -8UL);
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUMBState *env)
{
struct target_signal_frame *frame;
abi_ulong frame_addr;
int i;
frame_addr = get_sigframe(ka, env, sizeof *frame);
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto badframe;
/* Save the mask. */
__put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->extramask[i - 1]);
}
setup_sigcontext(&frame->uc.tuc_mcontext, env);
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
/* minus 8 is offset to cater for "rtsd r15,8" offset */
if (ka->sa_flags & TARGET_SA_RESTORER) {
env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
} else {
uint32_t t;
/* Note, these encodings are _big endian_! */
/* addi r12, r0, __NR_sigreturn */
t = 0x31800000UL | TARGET_NR_sigreturn;
__put_user(t, frame->tramp + 0);
/* brki r14, 0x8 */
t = 0xb9cc0008UL;
__put_user(t, frame->tramp + 1);
/* Return from sighandler will jump to the tramp.
Negative 8 offset because return is rtsd r15, 8 */
env->regs[15] = frame_addr + offsetof(struct target_signal_frame, tramp)
- 8;
}
/* Set up registers for signal handler */
env->regs[1] = frame_addr;
/* Signal handler args: */
env->regs[5] = sig; /* Arg 0: signum */
env->regs[6] = 0;
/* arg 1: sigcontext */
env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
/* Offset of 4 to handle microblaze rtid r14, 0 */
env->pc = (unsigned long)ka->_sa_handler;
unlock_user_struct(frame, frame_addr, 1);
return;
badframe:
force_sigsegv(sig);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUMBState *env)
{
qemu_log_mask(LOG_UNIMP, "setup_rt_frame: not implemented\n");
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
frame_addr = get_sigframe(ka, env, sizeof *frame);
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
force_sigsegv(sig);
return;
}
tswap_siginfo(&frame->info, info);
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
target_save_altstack(&frame->uc.tuc_stack, env);
setup_sigcontext(&frame->uc.tuc_mcontext, env);
for (int i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
/* Kernel does not use SA_RESTORER. */
/* addi r12, r0, __NR_sigreturn */
__put_user(0x31800000U | TARGET_NR_rt_sigreturn, frame->tramp + 0);
/* brki r14, 0x8 */
__put_user(0xb9cc0008U, frame->tramp + 1);
/*
* Return from sighandler will jump to the tramp.
* Negative 8 offset because return is rtsd r15, 8
*/
env->regs[15] =
frame_addr + offsetof(struct target_rt_sigframe, tramp) - 8;
/* Set up registers for signal handler */
env->regs[1] = frame_addr;
/* Signal handler args: */
env->regs[5] = sig;
env->regs[6] = frame_addr + offsetof(struct target_rt_sigframe, info);
env->regs[7] = frame_addr + offsetof(struct target_rt_sigframe, uc);
/* Offset to handle microblaze rtid r14, 0 */
env->pc = (unsigned long)ka->_sa_handler;
unlock_user_struct(frame, frame_addr, 1);
}
long do_sigreturn(CPUMBState *env)
{
struct target_signal_frame *frame;
abi_ulong frame_addr;
target_sigset_t target_set;
sigset_t set;
int i;
frame_addr = env->regs[R_SP];
trace_user_do_sigreturn(env, frame_addr);
/* Make sure the guest isn't playing games. */
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
goto badframe;
/* Restore blocked signals */
__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
}
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
restore_sigcontext(&frame->uc.tuc_mcontext, env);
/* We got here through a sigreturn syscall, our path back is via an
rtb insn so setup r14 for that. */
env->regs[14] = env->pc;
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
return -TARGET_ENOSYS;
}
long do_rt_sigreturn(CPUMBState *env)
{
trace_user_do_rt_sigreturn(env, 0);
qemu_log_mask(LOG_UNIMP, "do_rt_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
struct target_rt_sigframe *frame = NULL;
abi_ulong frame_addr = env->regs[1];
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
restore_sigcontext(&frame->uc.tuc_mcontext, env);
if (do_sigaltstack(frame_addr +
offsetof(struct target_rt_sigframe, uc.tuc_stack),
0, get_sp_from_cpustate(env)) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

1
linux-user/microblaze/target_signal.h
View File

@ -21,5 +21,4 @@ typedef struct target_sigaltstack {
#include "../generic/signal.h"
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* MICROBLAZE_TARGET_SIGNAL_H */

2
tests/tcg/multiarch/linux-test.c
View File

@ -296,7 +296,7 @@ static void test_socket(void)
server_fd = server_socket();
/* find out what port we got */
socklen = sizeof(server_addr);
ret = getsockname(server_fd, &server_addr, &socklen);
ret = getsockname(server_fd, (struct sockaddr *)&server_addr, &socklen);
chk_error(ret);
server_port = ntohs(server_addr.sin_port);