GOOGLE CHROME POWERPC G5 HOW TO READ ASSEMBLY

Chrome Canary is available for Windows and Mac and autoupdates daily. They also auto-update as new releases occur, which makes them a good choice for most uses. Chrome builds have the most infrastructure for analyzing crashes and reporting bugs. You can test Chrome builds or Chromium builds.

The usual reason is when using a PowerPC Mac, such as. Sorry - I assumed that you had to stay with 10.5.8. Mac OS X 10.1 (Firefox 1.0.8), OS X 10.2 and OS X 10.3 (Firefox 2.0.0.20), Mac OS X 10.4 (Firefox 3.X), Mac OS X 10.5 or above (Current Version). If this isn't your thing, don't worry our usual non-technical stuff will be back soon.)This computer will no longer receive Google Chrome updates because Mac OS X 10.6. It is designed to compliment Mac Linux USB Loader, though it can also be used separately (albeit with some setup work).(Note: this is one of our occasional extra-geeky technical posts.

Google Chrome Powerpc G5 How To Read Assembly

Video Streaming Capture For Mac Spss For Mac Os Download Google Chrome 64 Bit For Mac Dragon Nest Download Mac Binding Of.In any case, though, you need to know how to read assembly, either PowerPC (if you have an older Mac) or x86 (if you have anything recent). (We're all adults here, so I won't lecture you about the dangers of using private or undocumented interfaces in your apps.)5 (PowerPC G4, PowerPC G5). Or perhaps you're just curious about how things work. You might want to learn how how Apple achieves interesting effects.

But reading x86 assembly really isn't that hard. Most of it is Windows- or DOS-centric, usually with syntax that doesn't apply (Intel syntax vs the AT&T syntax that GCC uses), and with the aim of teaching how to write it. Despite the present and future of the Mac being x86, it seems like people have lots of anxiety about having to work with it.I think the problem is not a lack of documentation on x86 assembly, but a surfeit of it.

In this case, I chose SetWindowTitleWithCFString because it has to somehow set the title of a window even if it's minimized. And finally, this is only for the 32-bit version of each platform things change even more with 64 bits.The trail always begins with a public call that uses the SPI that you want to figure out. I'm going to go over each function twice (once for PowerPC and once for x86) feel free to skim the PowerPC version if you're accustomed to it.

Every function needs scratch registers to hold local variables, and usually the high-numbered registers are used. Then in we save off some registers that we're going to smash. Thus, almost every function starts with mflr r0, to pull the old PC into a usable register. Instead, the PowerPC has a link register and a command bl to branch and put the old PC value into the link register. The PowerPC doesn't have a dedicated stack pointer (convention is to use r1 for that), so the common way of implementing branches by pushing the PC onto the stack doesn't work.

Why are we using cr7 here? Probably because cr7 is volatile and we can get away with not saving/restoring it. (The end of the function will move r0 into r3 for return.)The PowerPC condition register has eight condition sets. We compare both r3 and r30 to zero, and if either are zero we jump to the end with r0 set to the appropriate error code. That's fine, as the WindowRef was just an index into a table and won't be needed further.At this point we run some checks. In addition, note that the function return value, being in r3, will overwrite the WindowRef value which wasn't saved in a high register. We see that we use the WindowRef as a parameter to a C++ function GetWindowData(OpaqueWindowPtr), as the WindowRef was passed in as r3 and r3 wasn't altered before the call.

There are eight registers you care about. Seriously, forget about that. X86 has fewer registers and they've historically had different roles (accumulator, base, source index, destination index, and so on). We restore the stack pointer, put the return value into r3, restore the registers, move the old PC back into the link register, and branch to the link register ( blr), returning us to our caller.The PowerPC register file is really easy: r0, r1, r2. We call a member function WindowData::SetTitleCommon(CFString*), and then do common tear down.

Ebp+4 is the PC of the function that called us. It points (to the stack) at the old frame pointer. In we save the old values of registers we're going to use, and in we allocate space on the stack.This is a perfect example of an ideal stack frame. At this point ebp is fixed for the entire function.

One interesting note is that rarely are parameters pushed onto the stack for a call. And below that is a bunch of stack space used for either register spillage or calling subsequent functions. Immediately below ebp are the values saved from the registers, which will be restored before the return.

There, lower registers like r3 are reused for parameter passing so important values are kept in the high registers. It's actually pretty analogous to how things go in PowerPC. Since fiddling in memory is slow, we pull the values into registers. : mov 0x8(%ebp),%eax // get WindowRef in %eax: mov 0xc(%ebp),%esi // get new title in %esiThe parameters are passed on the stack. We just set the memory right above esp (the stack pointer) and make the call.

In the constant 0xffffea20 is loaded into eax. The only thing of interest to note is the clever use of the peculiar register structure. : mov %eax,%edx // stick WindowData into %edx: mov $0xffffea20,%eax // errInvalidWindowRef: test %edx,%edx // if no window data, bail: test %esi,%esi // if no string to set, bailReturn values come back from functions in eax, but otherwise this is pretty much the same. Here, we just look at the register indirect addressing with esp. Why eax and esi? Why not? : mov %eax,(%esp) // put WindowRef on the stackWith the PowerPC, you can tell how many parameters a function has by seeing how many registers starting with r3 are loaded.

Just a fancy trick as the generated code is faster and smaller than the equivalent mov $0x0,%eax.: add $0x14,%esp // tear down stack frame and returnThe mirror image of the stack frame creation.That's one function down and one left to go. The one note is the zeroing of eax with an xor. Why do this? Because loading a 32 bit constant takes 5 bytes while loading a 16 bit constant only takes 4.: mov %esi,0x4(%esp) // load new title as param 2: mov %edx,(%esp) // load WindowData as param 1Same stuff as before. But since ax is just an alias for the lower 16 bits of eax, the upper half of the word is left as 0xffff and we get the full constant 0xffffffce in eax.

Google Chrome For Mac Powerpc G5