powerpc.c File Reference

Filter for PowerPC (big endian) binaries. More...

#include "simple_private.h"

Go to the source code of this file.

Functions
static size_t	powerpc_code (void *simple lzma_attribute((__unused__)), uint32_t now_pos, bool is_encoder, uint8_t *buffer, size_t size)
static lzma_ret	powerpc_coder_init (lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters, bool is_encoder)
lzma_ret	lzma_simple_powerpc_encoder_init (lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters)
lzma_ret	lzma_simple_powerpc_decoder_init (lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters)

Detailed Description

Filter for PowerPC (big endian) binaries.

Definition in file powerpc.c.

Function Documentation

lzma_simple_powerpc_decoder_init()

lzma_ret lzma_simple_powerpc_decoder_init	(	lzma_next_coder *	next,
		const lzma_allocator *	allocator,
		const lzma_filter_info *	filters
	)

Definition at line 71 of file powerpc.c.

{
    return powerpc_coder_init(next, allocator, filters, false);
}

References allocator, filters, and powerpc_coder_init().

lzma_simple_powerpc_encoder_init()

lzma_ret lzma_simple_powerpc_encoder_init	(	lzma_next_coder *	next,
		const lzma_allocator *	allocator,
		const lzma_filter_info *	filters
	)

Definition at line 62 of file powerpc.c.

{
    return powerpc_coder_init(next, allocator, filters, true);
}

References allocator, filters, and powerpc_coder_init().

powerpc_code()

static size_t powerpc_code ( void *simple   lzma_attribute(__unused__), uint32_t  now_pos, bool  is_encoder, uint8_t *  buffer, size_t  size  )

static

Definition at line 18 of file powerpc.c.

{
    size_t i;
    for (i = 0; i + 4 <= size; i += 4) {
        // PowerPC branch 6(48) 24(Offset) 1(Abs) 1(Link)
        if ((buffer[i] >> 2) == 0x12
                && ((buffer[i + 3] & 3) == 1)) {
 
            const uint32_t src
                = (((uint32_t)(buffer[i + 0]) & 3) << 24)
                | ((uint32_t)(buffer[i + 1]) << 16)
                | ((uint32_t)(buffer[i + 2]) << 8)
                | ((uint32_t)(buffer[i + 3]) & ~UINT32_C(3));
 
            uint32_t dest;
            if (is_encoder)
                dest = now_pos + (uint32_t)(i) + src;
            else
                dest = src - (now_pos + (uint32_t)(i));
 
            buffer[i + 0] = 0x48 | ((dest >> 24) &  0x03);
            buffer[i + 1] = (dest >> 16);
            buffer[i + 2] = (dest >> 8);
            buffer[i + 3] &= 0x03;
            buffer[i + 3] |= dest;
        }
    }
 
    return i;
}

References dest, i, src, and UINT32_C.

Referenced by powerpc_coder_init().

powerpc_coder_init()

static lzma_ret powerpc_coder_init ( lzma_next_coder *  next, const lzma_allocator *  allocator, const lzma_filter_info *  filters, bool  is_encoder  )

static

Definition at line 53 of file powerpc.c.

{
    return lzma_simple_coder_init(next, allocator, filters,
            &powerpc_code, 0, 4, 4, is_encoder);
}

References allocator, filters, lzma_simple_coder_init(), and powerpc_code().

Referenced by lzma_simple_powerpc_decoder_init(), and lzma_simple_powerpc_encoder_init().