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142 lines
3.4 KiB
142 lines
3.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_SPARC_SYSCALL_H |
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#define __ASM_SPARC_SYSCALL_H |
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#include <uapi/linux/audit.h> |
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#include <linux/kernel.h> |
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#include <linux/compat.h> |
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#include <linux/sched.h> |
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#include <asm/ptrace.h> |
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#include <asm/thread_info.h> |
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/* |
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* The syscall table always contains 32 bit pointers since we know that the |
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* address of the function to be called is (way) below 4GB. So the "int" |
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* type here is what we want [need] for both 32 bit and 64 bit systems. |
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*/ |
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extern const unsigned int sys_call_table[]; |
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/* The system call number is given by the user in %g1 */ |
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static inline long syscall_get_nr(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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int syscall_p = pt_regs_is_syscall(regs); |
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return (syscall_p ? regs->u_regs[UREG_G1] : -1L); |
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} |
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static inline void syscall_rollback(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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/* XXX This needs some thought. On Sparc we don't |
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* XXX save away the original %o0 value somewhere. |
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* XXX Instead we hold it in register %l5 at the top |
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* XXX level trap frame and pass this down to the signal |
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* XXX dispatch code which is the only place that value |
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* XXX ever was needed. |
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*/ |
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} |
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#ifdef CONFIG_SPARC32 |
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static inline bool syscall_has_error(struct pt_regs *regs) |
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{ |
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return (regs->psr & PSR_C) ? true : false; |
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} |
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static inline void syscall_set_error(struct pt_regs *regs) |
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{ |
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regs->psr |= PSR_C; |
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} |
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static inline void syscall_clear_error(struct pt_regs *regs) |
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{ |
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regs->psr &= ~PSR_C; |
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} |
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#else |
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static inline bool syscall_has_error(struct pt_regs *regs) |
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{ |
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return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false; |
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} |
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static inline void syscall_set_error(struct pt_regs *regs) |
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{ |
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regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY); |
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} |
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static inline void syscall_clear_error(struct pt_regs *regs) |
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{ |
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regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY); |
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} |
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#endif |
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static inline long syscall_get_error(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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long val = regs->u_regs[UREG_I0]; |
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return (syscall_has_error(regs) ? -val : 0); |
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} |
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static inline long syscall_get_return_value(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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long val = regs->u_regs[UREG_I0]; |
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return val; |
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} |
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static inline void syscall_set_return_value(struct task_struct *task, |
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struct pt_regs *regs, |
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int error, long val) |
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{ |
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if (error) { |
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syscall_set_error(regs); |
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regs->u_regs[UREG_I0] = -error; |
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} else { |
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syscall_clear_error(regs); |
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regs->u_regs[UREG_I0] = val; |
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} |
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} |
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static inline void syscall_get_arguments(struct task_struct *task, |
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struct pt_regs *regs, |
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unsigned long *args) |
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{ |
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int zero_extend = 0; |
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unsigned int j; |
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unsigned int n = 6; |
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#ifdef CONFIG_SPARC64 |
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if (test_tsk_thread_flag(task, TIF_32BIT)) |
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zero_extend = 1; |
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#endif |
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for (j = 0; j < n; j++) { |
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unsigned long val = regs->u_regs[UREG_I0 + j]; |
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if (zero_extend) |
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args[j] = (u32) val; |
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else |
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args[j] = val; |
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} |
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} |
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static inline void syscall_set_arguments(struct task_struct *task, |
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struct pt_regs *regs, |
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const unsigned long *args) |
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{ |
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unsigned int i; |
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for (i = 0; i < 6; i++) |
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regs->u_regs[UREG_I0 + i] = args[i]; |
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} |
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static inline int syscall_get_arch(struct task_struct *task) |
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{ |
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#if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT) |
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return test_tsk_thread_flag(task, TIF_32BIT) |
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? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64; |
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#elif defined(CONFIG_SPARC64) |
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return AUDIT_ARCH_SPARC64; |
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#else |
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return AUDIT_ARCH_SPARC; |
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#endif |
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} |
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#endif /* __ASM_SPARC_SYSCALL_H */
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