[Xen-changelog] [qemu-xen master] target-i386: document how x86 gdb_num_core_regs is computed.

[patchbot@xxxxxxx]

commit 175cad36a599bb24ab2a5cd195c96b1f123e25a9
Author:     Doug Evans <dje@xxxxxxxxxx>
AuthorDate: Thu Nov 3 21:48:56 2016 +0000
Commit:     Paolo Bonzini <pbonzini@xxxxxxxxxx>
CommitDate: Thu Nov 10 16:01:09 2016 +0100

    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: Doug Evans <dje@xxxxxxxxxx>
    Message-Id: <94eb2c187eda43dba005406c86f7@xxxxxxxxxx>
    Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 target-i386/cpu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 14c5186..6eec5dc 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -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;
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

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