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launch payloads in a thread, and do some cleanup before the thread te…
…rminates
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| /* Copyright (C) 2023 John Törnblom | ||
| This program is free software; you can redistribute it and/or modify it | ||
| under the terms of the GNU General Public License as published by the | ||
| Free Software Foundation; either version 3, or (at your option) any | ||
| later version. | ||
| This program is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU General Public License for more details. | ||
| You should have received a copy of the GNU General Public License | ||
| along with this program; see the file COPYING. If not, see | ||
| <http://www.gnu.org/licenses/>. */ | ||
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| #include "payload.h" | ||
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| typedef void* pthread_t; | ||
| typedef void* pthread_attr_t; | ||
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| typedef struct payload_ctx { | ||
| payload_entry_t *entry; | ||
| payload_args_t *args; | ||
| int stdout; | ||
| } payload_ctx_t; | ||
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| static void* (*malloc)(unsigned long); | ||
| static void (*free)(void*); | ||
| static void* (*memcpy)(void*, const void*, unsigned long); | ||
| static int (*close)(int); | ||
| static int (*dup)(int); | ||
| static int (*dup2)(int, int); | ||
| static int (*pthread_create)(pthread_t*, pthread_attr_t*, | ||
| void*(*f)(void*), void*); | ||
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| static void* | ||
| payload_thread(void* args) { | ||
| payload_ctx_t *ctx = (payload_ctx_t*)args; | ||
| int stdout = dup(1); | ||
| int stderr = dup(2); | ||
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| dup2(ctx->stdout, 1); | ||
| dup2(ctx->stdout, 2); | ||
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| ctx->entry(ctx->args); | ||
| free(args); | ||
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| dup2(stdout, 1); | ||
| dup2(stderr, 2); | ||
| close(ctx->stdout); | ||
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| return 0; | ||
| } | ||
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| int main(payload_ctx_t *ctx) { | ||
| pthread_t trd; | ||
| void* trd_args = malloc(sizeof(payload_ctx_t)); | ||
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| memcpy(trd_args, ctx, sizeof(payload_ctx_t)); | ||
| pthread_create(&trd, 0, payload_thread, trd_args); | ||
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| return 0; | ||
| } | ||
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| static int | ||
| init(payload_args_t *args) { | ||
| int error; | ||
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| if((error=args->sceKernelDlsym(0x2001, "pthread_create", &pthread_create))) { | ||
| return error; | ||
| } | ||
| if((error=args->sceKernelDlsym(0x2001, "dup", &dup))) { | ||
| return error; | ||
| } | ||
| if((error=args->sceKernelDlsym(0x2001, "dup2", &dup2))) { | ||
| return error; | ||
| } | ||
| if((error=args->sceKernelDlsym(0x2001, "close", &close))) { | ||
| return error; | ||
| } | ||
| if((error=args->sceKernelDlsym(0x2, "malloc", &malloc))) { | ||
| return error; | ||
| } | ||
| if((error=args->sceKernelDlsym(0x2, "free", &free))) { | ||
| return error; | ||
| } | ||
| if((error=args->sceKernelDlsym(0x2, "memcpy", &memcpy))) { | ||
| return error; | ||
| } | ||
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| return 0; | ||
| } | ||
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| void | ||
| _start(payload_entry_t *entry, payload_args_t *args, int stdout) { | ||
| payload_ctx_t ctx = { | ||
| .entry = entry, | ||
| .args = args, | ||
| .stdout = stdout | ||
| }; | ||
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| if(!(*args->payloadout=init(args))) { | ||
| *args->payloadout = main(&ctx); | ||
| } | ||
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| __builtin_debugtrap(); | ||
| } |