2018-09-25 09:22:51 -07:00
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/* See COPYRIGHT for copyright information. */
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#ifndef JOS_KERN_ENV_H
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#define JOS_KERN_ENV_H
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#include <inc/env.h>
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2018-10-06 06:52:47 -07:00
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#include <kern/cpu.h>
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2018-09-25 09:22:51 -07:00
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extern struct Env *envs; // All environments
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2018-10-06 06:52:47 -07:00
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#define curenv (thiscpu->cpu_env) // Current environment
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2018-09-25 09:22:51 -07:00
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extern struct Segdesc gdt[];
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void env_init(void);
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void env_init_percpu(void);
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int env_alloc(struct Env **e, envid_t parent_id);
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void env_free(struct Env *e);
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void env_create(uint8_t *binary, enum EnvType type);
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void env_destroy(struct Env *e); // Does not return if e == curenv
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int envid2env(envid_t envid, struct Env **env_store, bool checkperm);
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// The following two functions do not return
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void env_run(struct Env *e) __attribute__((noreturn));
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void env_pop_tf(struct Trapframe *tf) __attribute__((noreturn));
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// Without this extra macro, we couldn't pass macros like TEST to
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// ENV_CREATE because of the C pre-processor's argument prescan rule.
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#define ENV_PASTE3(x, y, z) x ## y ## z
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#define ENV_CREATE(x, type) \
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do { \
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extern uint8_t ENV_PASTE3(_binary_obj_, x, _start)[]; \
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env_create(ENV_PASTE3(_binary_obj_, x, _start), \
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type); \
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} while (0)
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#endif // !JOS_KERN_ENV_H
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