Using objdump, the actual program start is _rt0_amd64_linux <https://github.com/golang/go/blob/0f02664666bb30e7cb4041dd0f8d7f739ffd54af/src/runtime/rt0_linux_amd64.s#L7> (on that platform, obviously), which, if you follow it, pretty much does nothing but call runtime•rt0_go <https://github.com/golang/go/blob/0f02664666bb30e7cb4041dd0f8d7f739ffd54af/src/runtime/asm_amd64.s#L87>, which seems to be doing the initialization you are talking about. For the implementation of getg you have to look at the compiler <https://github.com/golang/go/blob/0f02664666bb30e7cb4041dd0f8d7f739ffd54af/src/cmd/compile/internal/amd64/ssa.go#L925> (found by grepping in src/cmd/compile).
Hope this can serve as a starting point for further investigation - I'm not actually familiar with this stuff myself, I'm afraid :) On Tue, Nov 20, 2018 at 8:53 AM Fei Ding <fding...@gmail.com> wrote: > Hi > > I am trying to figure out the process of creation of the very first > g(goroutine), together with the very fist m, and p. It seems that the > deepest code I can find is at proc.go > <https://github.com/golang/go/blob/master/src/runtime/proc.go#L110>, and > the getg() function is my dead end, which has no implementation written by > golang. So, here is my q: > > 1. I guess before the user main() function be executed, a lot of work has > already been finished, including creating the very first g/m/p, where the > code is? It seems to be asm code? I do have some problem reading/digging > asm code. > > 2. Could any one explain the whole process of creating the very first > g/m/p? > > Thanks. > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
