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Implement _POSIX_SPAWN_DISABLE_ASLR (darlinghq/darling#304)
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src/kernel/emulation/linux/process/posix_spawn.c
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src/kernel/emulation/linux/process/posix_spawn.c
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#include "fork.h"
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#include <stddef.h>
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#include <stdint.h>
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#include "../../../../../kernel-include/sys/spawn.h"
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#include <sys/spawn.h>
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#ifndef _POSIX_SPAWN_DISABLE_ASLR
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#define _POSIX_SPAWN_DISABLE_ASLR 0x0100
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#endif
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#define LINUX_ADDR_NO_RANDOMIZE 0x40000
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long sys_posix_spawn(int* pid, const char* path, const struct _posix_spawn_args_desc* desc,
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char** argvp, char** envp)
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ret = sys_sigprocmask(3 /* SIG_SETMASK */, &desc->attrp->psa_sigmask, NULL);
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if (ret != 0)
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goto fail;
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}
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if (desc->attrp->psa_flags & _POSIX_SPAWN_DISABLE_ASLR)
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{
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unsigned int pers = LINUX_SYSCALL(__NR_personality, 0xffffffff);
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if (!(pers & LINUX_ADDR_NO_RANDOMIZE))
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{
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pers |= LINUX_ADDR_NO_RANDOMIZE;
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LINUX_SYSCALL(__NR_personality, pers);
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}
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}
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// TODO: other attributes