mirror of
https://github.com/fluencelabs/musl
synced 2025-06-21 10:41:53 +00:00
12e9b4faf6
this doubles the performance of the fastest syscalls on the atom I tested it on; improvement is reportedly much more dramatic on worst-case cpus. cannot be used for cancellable syscalls.
44 lines
932 B
C
44 lines
932 B
C
#include <elf.h>
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#include "libc.h"
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void __init_tls(size_t *);
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void __init_security(size_t *);
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#define AUX_CNT 38
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extern size_t __hwcap, __sysinfo;
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void __init_libc(char **envp)
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{
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size_t i, *auxv, aux[AUX_CNT] = { 0 };
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__environ = envp;
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for (i=0; envp[i]; i++);
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libc.auxv = auxv = (void *)(envp+i+1);
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for (i=0; auxv[i]; i+=2) if (auxv[i]<AUX_CNT) aux[auxv[i]] = auxv[i+1];
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__hwcap = aux[AT_HWCAP];
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__sysinfo = aux[AT_SYSINFO];
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__init_tls(aux);
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__init_security(aux);
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}
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int __libc_start_main(
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int (*main)(int, char **, char **), int argc, char **argv,
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int (*init)(int, char **, char **), void (*fini)(void),
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void (*ldso_fini)(void))
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{
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char **envp = argv+argc+1;
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__init_libc(envp);
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libc.ldso_fini = ldso_fini;
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libc.fini = fini;
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/* Execute constructors (static) linked into the application */
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if (init) init(argc, argv, envp);
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/* Pass control to to application */
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exit(main(argc, argv, envp));
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return 0;
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}
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