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9951c38515
This adds a new persistent hook library `mipsel_read_into_a0.c`. With it, you can test the persistent hook on the *mipsel* architecture. I'm also updating the README in `utils/qemu_persistent_hook` and Makefile and explain how to test the persistent hook on *mipsel*. This all works thanks to qemuafl already having the correct CPU struct for *mipsel* in `qemuafl/api.h`. This patch also updates the root `.gitignore` file to ignore the two test binaries `test` and `mipsel_test`.
36 lines
939 B
C
36 lines
939 B
C
#define TARGET_MIPS
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#include "../../qemu_mode/qemuafl/qemuafl/api.h"
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#include <stdio.h>
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#include <string.h>
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#define g2h(x) ((void *)((unsigned long)(x) + guest_base))
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#define h2g(x) ((uint64_t)(x) - guest_base)
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void afl_persistent_hook(struct mips_regs *regs, uint64_t guest_base,
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uint8_t *input_buf, uint32_t input_buf_len) {
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// In this example the register $a0 is pointing to the memory location
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// of the target buffer, and the length of the input is in $a1.
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// This can be seen with a debugger, e.g. gdb (and "disass main")
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printf("Placing input into 0x%lx\n", regs->a0);
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if (input_buf_len > 1024) input_buf_len = 1024;
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memcpy(g2h(regs->a0), input_buf, input_buf_len);
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regs->a1 = input_buf_len;
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}
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#undef g2h
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#undef h2g
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int afl_persistent_hook_init(void) {
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// 1 for shared memory input (faster), 0 for normal input (you have to use
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// read(), input_buf will be NULL)
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return 1;
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}
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