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Enable use of a global shared page for RISC-V.

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machine/vmparam.h already defines the SHAREDPAGE constant.  This
change just enables it for ELF executables.  The only use of the
shared page currently is to hold the signal trampoline.

Reviewed by:	markj, kib
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D17875
This commit is contained in:
John Baldwin 2018-11-07 18:27:43 +00:00
parent fda4dad508
commit 274c0a806a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=340228
1 changed files with 3 additions and 1 deletions
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4
sys/riscv/riscv/elf_machdep.c
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@ -83,10 +83,12 @@ struct sysentvec elf64_freebsd_sysvec = {
.sv_setregs = exec_setregs,
.sv_fixlimit = NULL,
.sv_maxssiz = NULL,
.sv_flags = SV_ABI_FREEBSD | SV_LP64,
.sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP,
.sv_set_syscall_retval = cpu_set_syscall_retval,
.sv_fetch_syscall_args = cpu_fetch_syscall_args,
.sv_syscallnames = syscallnames,
.sv_shared_page_base = SHAREDPAGE,
.sv_shared_page_len = PAGE_SIZE,
.sv_schedtail = NULL,
.sv_thread_detach = NULL,
.sv_trap = NULL,