Hi Claudiu, ping! Is is possible to switch between mcount modes (Linux-style <-> baremetal-style) via command-line options for ARC GCC? >From: Alexey Brodkin <abrodkin@xxxxxxxxxxxx> >Sent: Thursday, April 2, 2020 17:15 >To: Claudiu Zissulescu Ianculescu >Cc: linux-kernel@xxxxxxxxxxxxxxx; Steven Rostedt; Ingo Molnar; linux-snps-arc@xxxxxxxxxxxxxxxxxxx; Eugeniy Paltsev; Vineet Gupta >Subject: RE: [RFC] ARC: initial ftrace support > > Hi Claus, > >> -----Original Message----- >> From: linux-snps-arc <linux-snps-arc-bounces@xxxxxxxxxxxxxxxxxxx> On Behalf Of Claudiu Zissulescu >> Ianculescu >> Sent: Thursday, April 2, 2020 11:10 AM >> To: Vineet Gupta <vgupta@xxxxxxxxxxxx> >> Cc: Alexey Brodkin <abrodkin@xxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; Steven Rostedt >> <rostedt@xxxxxxxxxxx>; Ingo Molnar <mingo@xxxxxxxxxx>; linux-snps-arc@xxxxxxxxxxxxxxxxxxx; Eugeniy >> Paltsev <paltsev@xxxxxxxxxxxx> >> Subject: Re: [RFC] ARC: initial ftrace support >> >> Hi, >> >> ARC-gcc has two modes to call the mcount routines. When using elf32 >> configuration, the toolchain is set to use newlib mcount. When >> configured for linux, gcc toolchain is using a library call to _mcall >> (single underscore) having blink as input argument. >> So, using the proper linux toolchain, your patch should work. > > > Is there a chance to switch to Linux-style mcount in Elf32 toolchain with a command-line > option? > > Otherwise I guess we'll need to implement some warning which explicitly says why Elf32 > toolchain is not usable for building the Linux kernel... at least in case with ftrace enabled. > >-Alexey _______________________________________________ linux-snps-arc mailing list linux-snps-arc@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-snps-arc
