Update the Microblaze main loop and sigreturn code: * on TARGET_ERESTARTSYS, wind guest PC backwards to repeat syscall insn * set all guest CPU state within signal.c code on sigreturn * handle TARGET_QEMU_ESIGRETURN in the main loop as the indication that the main loop should not touch any guest CPU state Note that this in passing fixes a bug where we were corrupting the guest r[3] on sigreturn with the guest's r[10] because do_sigreturn() was returning env->regs[10] but the register for syscall return values is env->regs[3]. Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk> Message-id: 1441497448-32489-11-git-send-email-T.E.Baldwin99@members.leeds.ac.uk Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: Commit message tweaks; drop TARGET_USE_ERESTARTSYS define; drop whitespace changes] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
31 lines
539 B
C
31 lines
539 B
C
#ifndef TARGET_SIGNAL_H
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#define TARGET_SIGNAL_H
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#include "cpu.h"
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/* this struct defines a stack used during syscall handling */
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typedef struct target_sigaltstack {
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abi_ulong ss_sp;
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abi_ulong ss_size;
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abi_long ss_flags;
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} target_stack_t;
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/*
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* sigaltstack controls
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*/
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#define TARGET_SS_ONSTACK 1
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#define TARGET_SS_DISABLE 2
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#define TARGET_MINSIGSTKSZ 2048
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#define TARGET_SIGSTKSZ 8192
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static inline abi_ulong get_sp_from_cpustate(CPUMBState *state)
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{
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return state->regs[14];
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}
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#endif /* TARGET_SIGNAL_H */
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