diff options
Diffstat (limited to 'doc/nasmdoc.src')
| -rw-r--r-- | doc/nasmdoc.src | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/doc/nasmdoc.src b/doc/nasmdoc.src index 09e06fa..327e3cf 100644 --- a/doc/nasmdoc.src +++ b/doc/nasmdoc.src @@ -956,6 +956,10 @@ Enabled by default. prefixes. Enabled by default. +\b \i\c{bnd} warns about ineffective use of the \c{BND} prefix when a relaxed +form of jmp instruction becomes jmp short form. +Enabled by default. + \b \i\c{error} causes warnings to be treated as errors. Disabled by default. @@ -1214,7 +1218,7 @@ The instruction field may contain any machine instruction: Pentium and P6 instructions, FPU instructions, MMX instructions and even undocumented instructions are all supported. The instruction may be prefixed by \c{LOCK}, \c{REP}, \c{REPE}/\c{REPZ}, \c{REPNE}/\c{REPNZ}, -\c{XACQUIRE}/\c{XRELEASE} or \c{BND}, in the usual way. Explicit +\c{XACQUIRE}/\c{XRELEASE} or \c{BND}/\c{NOBND}, in the usual way. Explicit \I{address-size prefixes}address-size and \i{operand-size prefixes} \i\c{A16}, \i\c{A32}, \i\c{A64}, \i\c{O16} and \i\c{O32}, \i\c{O64} are provided - one example of their use is given in \k{mixsize}. You can also use the name of a \I{segment @@ -4434,9 +4438,12 @@ specify most features directly. However, this is occationally obnoxious, as the explicit form is pretty much the only one one wishes to use. -Currently, the only \c{DEFAULT} that is settable is whether or not -registerless instructions in 64-bit mode are \c{RIP}-relative or not. -By default, they are absolute unless overridden with the \i\c{REL} +Currently, \c{DEFAULT} can set \c{REL} & \c{ABS} and \c{BND} & \c{NOBND}. + +\S{REL & ABS} \i\c{REL} & \i\c{ABS}: RIP-relative addressing + +This sets whether registerless instructions in 64-bit mode are \c{RIP}-relative +or not. By default, they are absolute unless overridden with the \i\c{REL} specifier (see \k{effaddr}). However, if \c{DEFAULT REL} is specified, \c{REL} is default, unless overridden with the \c{ABS} specifier, \e{except when used with an FS or GS segment override}. @@ -4448,6 +4455,19 @@ other special functions in 64-bit mode, and generating \c{DEFAULT REL} is disabled with \c{DEFAULT ABS}. +\S{BND & NOBND} \i\c{BND} & \i\c{NOBND}: \c{BND} prefix + +If \c{DEFAULT BND} is set, all bnd-prefix available instructions following +this directive are prefixed with bnd. To override it, \c{NOBND} prefix can +be used. + +\c DEFAULT BND +\c call foo ; BND will be prefixed +\c nobnd call foo ; BND will NOT be prefixed + +DEFAULT NOBND can disable DEFAULT BND and then \c{BND} prefix will be added +only when explicitly specified in code. + \H{section} \i\c{SECTION} or \i\c{SEGMENT}: Changing and \i{Defining Sections} |