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Improve the comment in the ARM setjmp.S. 

Based on code review comments for 460130b7d0.

Bug: N/A
Test: N/A
Change-Id: Ia86bc92dfe3f18261e06af33488a548ea9911b10
This commit is contained in:
Elliott Hughes 2018-02-05 13:36:02 -08:00
parent a026108ec1
commit e58d49e76c
1 changed files with 5 additions and 7 deletions
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12
libc/arch-arm/bionic/setjmp.S
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@ -58,17 +58,15 @@
// 0 sigflag/cookie setjmp cookie in top 31 bits, signal mask flag in low bit
// 1 sigmask 64-bit signal mask (not used with _setjmp / _longjmp)
// 2 " "
// 3 reserved (unused to allow float_base to be maximally aligned)
// 3 reserved (unused to allow float_base to be maximally aligned;
// this avoids software emulation of unaligned loads/stores)
// 4 float_base base of float registers (d8 to d15)
// 20 float_state floating-point status and control register
// 21 core_base base of core registers (r4-r11, r13-r14)
// 31 checksum checksum of all of the core registers, to give better error messages.
// 31 checksum checksum of all of the core registers, to give better error messages
// 32 reserved reserved entries (room to grow)
// 64
//
// NOTE: float_base must be at an even word index, since the
// FP registers will be loaded/stored with instructions
// that expect 8-byte alignment.
// ...
// 63 " "
#define _JB_SIGFLAG 0
#define _JB_SIGMASK (_JB_SIGFLAG + 1)