Commit 175cad36 authored by Doug Evans's avatar Doug Evans Committed by Paolo Bonzini
Browse files

target-i386: document how x86 gdb_num_core_regs is computed. 



It helps when reading the code to see how the number is arrived at.

Signed-off-by: default avatarDoug Evans <dje@google.com>
Message-Id: <94eb2c187eda43dba005406c86f7@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 2209401f

target-i386/cpu.c

+3 −0
Original line number Diff line number Diff line
@@ -3721,6 +3721,9 @@ static void x86_cpu_common_class_init(ObjectClass *oc, void *data) 
    cc->write_elf32_qemunote = x86_cpu_write_elf32_qemunote;

    cc->vmsd = &vmstate_x86_cpu;

#endif

    /* CPU_NB_REGS * 2 = general regs + xmm regs

     * 25 = eip, eflags, 6 seg regs, st[0-7], fctrl,...,fop, mxcsr.

     */

    cc->gdb_num_core_regs = CPU_NB_REGS * 2 + 25;

#ifndef CONFIG_USER_ONLY

    cc->debug_excp_handler = breakpoint_handler;