From dde0538b484df627dac14ff030dd09f55c78558e Mon Sep 17 00:00:00 2001 From: vanhauser-thc Date: Wed, 28 Apr 2021 10:59:34 +0200 Subject: nits --- utils/qemu_persistent_hook/read_into_rdi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'utils/qemu_persistent_hook/read_into_rdi.c') diff --git a/utils/qemu_persistent_hook/read_into_rdi.c b/utils/qemu_persistent_hook/read_into_rdi.c index c1c6642f..14b2ed85 100644 --- a/utils/qemu_persistent_hook/read_into_rdi.c +++ b/utils/qemu_persistent_hook/read_into_rdi.c @@ -3,12 +3,12 @@ #include #include -void afl_persistent_hook(struct x86_64_regs *regs, uint64_t guest_base, - uint8_t *input_buf, uint32_t input_buf_len) { - #define g2h(x) ((void *)((unsigned long)(x) + guest_base)) #define h2g(x) ((uint64_t)(x)-guest_base) +void afl_persistent_hook(struct x86_64_regs *regs, uint64_t guest_base, + uint8_t *input_buf, uint32_t input_buf_len) { + // In this example the register RDI is pointing to the memory location // of the target buffer, and the length of the input is in RSI. // This can be seen with a debugger, e.g. gdb (and "disass main") @@ -19,11 +19,11 @@ void afl_persistent_hook(struct x86_64_regs *regs, uint64_t guest_base, memcpy(g2h(regs->rdi), input_buf, input_buf_len); regs->rsi = input_buf_len; +} + #undef g2h #undef h2g -} - int afl_persistent_hook_init(void) { // 1 for shared memory input (faster), 0 for normal input (you have to use -- cgit 1.4.1