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arch/x86_64/intel64/intel64_schedulesigaction.c: properly align signal handler stack for vector operations

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signal handler stack must be properly aligned, otherwise vector instructions doesn't work in signal handler

Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
This commit is contained in:
p-szafonimateusz 2024-08-22 10:36:05 +02:00 • committed by Xiang Xiao
parent ed4acb20cc
commit ce61347ddf
1 changed files with 8 additions and 1 deletions
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9
arch/x86_64/src/intel64/intel64_schedulesigaction.c
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@ -130,6 +130,7 @@ void up_schedule_sigaction(struct tcb_s *tcb, sig_deliver_t sigdeliver)
*/
up_current_regs()[REG_RIP] = (uint64_t)x86_64_sigdeliver;
up_current_regs()[REG_RSP] = up_current_regs()[REG_RSP] - 8;
up_current_regs()[REG_RFLAGS] = 0;
/* And make sure that the saved context in the TCB
@ -162,6 +163,7 @@ void up_schedule_sigaction(struct tcb_s *tcb, sig_deliver_t sigdeliver)
*/
tcb->xcp.regs[REG_RIP] = (uint64_t)x86_64_sigdeliver;
tcb->xcp.regs[REG_RSP] = tcb->xcp.regs[REG_RSP] - 8;
tcb->xcp.regs[REG_RFLAGS] = 0;
}
}
@ -242,6 +244,7 @@ void up_schedule_sigaction(struct tcb_s *tcb, sig_deliver_t sigdeliver)
*/
tcb->xcp.regs[REG_RIP] = (uint64_t)x86_64_sigdeliver;
tcb->xcp.regs[REG_RSP] = tcb->xcp.regs[REG_RSP] - 8;
tcb->xcp.regs[REG_RFLAGS] = 0;
}
else
@ -261,7 +264,10 @@ void up_schedule_sigaction(struct tcb_s *tcb, sig_deliver_t sigdeliver)
* disabled
*/
up_current_regs()[REG_RIP] = (uint64_t)x86_64_sigdeliver;
up_current_regs()[REG_RIP] =
(uint64_t)x86_64_sigdeliver;
up_current_regs()[REG_RSP] =
up_current_regs()[REG_RSP] - 8;
up_current_regs()[REG_RFLAGS] = 0;
/* And make sure that the saved context in the TCB
@ -308,6 +314,7 @@ void up_schedule_sigaction(struct tcb_s *tcb, sig_deliver_t sigdeliver)
*/
tcb->xcp.regs[REG_RIP] = (uint64_t)x86_64_sigdeliver;
tcb->xcp.regs[REG_RSP] = tcb->xcp.regs[REG_RSP] - 8;
tcb->xcp.regs[REG_RFLAGS] = 0;
}
}